CN107702284A - A kind of constant temperature and humidity system and its control method - Google Patents
A kind of constant temperature and humidity system and its control method Download PDFInfo
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- CN107702284A CN107702284A CN201710930303.7A CN201710930303A CN107702284A CN 107702284 A CN107702284 A CN 107702284A CN 201710930303 A CN201710930303 A CN 201710930303A CN 107702284 A CN107702284 A CN 107702284A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 238000004378 air conditioning Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract 1
- 230000004069 differentiation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Abstract
The invention discloses a kind of constant temperature and humidity system and its control method, belongs to air-conditioning system technical field, is designed to solve the problems such as prior art high energy consumption.The control method of constant temperature and humidity system of the present invention, measurement actual room temperature T1SurveyWith actual indoor dew-point temperature T2Survey；According to actual room temperature T1SurveyWith setting wind pushing temperature T1IfDifference △ T1 to T1IfIt is corrected：T1School=T1If+f(△T1),△T1>When 0, f (△ T1)<0, △ T1<When 0, f (△ T1)>0；According to actual indoor dew-point temperature T2SurveyWith setting air-supply dew-point temperature T2IfDifference △ T2 to T2IfIt is corrected：T2School=T2If+F(△T2),△T2>When 0, F (△ T2)<0, △ T2<When 0, F (△ T2)>0.Constant temperature and humidity system and its control method energy consumption provided by the invention is low.
Description
Technical field
The present invention relates to air-conditioning system technical field, more particularly to a kind of constant temperature and humidity system and its control method.
Background technology
At present, the application scenario of constant temperature and humidity air-conditioning system is more and more, such as in electronics, hospital, metering, weaving and light
The fields such as instrument are learned, to ensure the environment of some products or operation in constant temperature and humidity.
But there is problems with current constant temperature and humidity system：
When the temperature of interior is raised and lowered, the setting wind pushing temperature of the fresh air handining unit of constant temperature and humidity system will not
Change, the energy consumption increase for causing to freeze or heating；When indoor dew-point temperature is raised and lowered, the fresh air of constant temperature and humidity system is empty
Adjusting the setting air-supply dew point of unit will not change, the energy consumption increase for causing to dehumidify or humidifying.
The content of the invention
It is an object of the present invention to propose a kind of control method of the small constant temperature and humidity system of energy consumption；
The constant temperature and humidity system small it is another object of the present invention to propose a kind of energy consumption.
For up to this purpose, on the one hand, the present invention uses following technical scheme：
A kind of control method of constant temperature and humidity system, including：
Measure the actual room temperature T1 in constant temperature and humidity roomSurveyWith actual indoor dew-point temperature T2Survey；
According to actual room temperature T1SurveyWith the setting wind pushing temperature T1 of the air supplying part of constant temperature and humidity systemIfDifference △ T1 to T1If
It is corrected：T1School=T1If+ f (△ T1), wherein, △ T1=T1Survey-T1If, △ T1>When 0, f (△ T1)<0, △ T1<When 0, f (△
T1)>0, T1SchoolFor the setting wind pushing temperature after the correction of the air supplying part；
According to actual indoor dew-point temperature T2SurveyWith the setting air-supply dew-point temperature T2 of the air supplying part of constant temperature and humidity systemIf's
Difference △ T2 are to T2IfIt is corrected：T2School=T2If+ F (△ T2), wherein, △ T2=T2Survey-T2If, △ T2>When 0, F (△ T2)<0,
△T2<When 0, F (△ T2)>0, T2SchoolFor the setting air-supply dew-point temperature after the correction of the air supplying part.
Further, f (△ T1) and F (△ T2) are calculated by controller by PID respectively.
Further, when constant temperature and humidity system is freezed, wind pushing temperature is set as T1 after air supplying part correctionSchool,
When constant temperature and humidity system heats, wind pushing temperature is set as T1 ' after the air supplying part correctionSchool, T1 'School=T1School- the
One dead band temperature, 0<First dead band Wen Du≤1 DEG C；
When constant temperature and humidity system dehumidifies, air-supply dew-point temperature is set as T2 after the air supplying part correctionSchool,
When constant temperature and humidity system humidifies, air-supply dew-point temperature is set as T2 ' after the air supplying part correction, T2 'School=T2School-
Second dead band temperature, 0<Second dead band Wen Du≤1 DEG C.
Further, constant temperature and humidity system includes cooling unit, when the constant temperature and humidity system is used to cool and dehumidify,
The constant temperature and humidity system is cooled and dehumidified by the cooling unit；The cooling unit includes the first heat exchanger tube and set
The first control valve being placed on first heat exchanger tube, when according to the T1SchoolWith the T2SchoolControl first control valve tool
When having different aperture changing values, the controller is with the T1SchoolWith the T2SchoolIn make it is described first control valve opening changing value
Bigger one controls the aperture of first control valve to change.
On the other hand, the present invention uses following technical scheme：
A kind of constant temperature and humidity system, including controller and be connected respectively with the controller temperature regulation section, humidity adjust
Section portion, air supplying part, temperature sensor and indoor dew point temperature sensor；
The air supplying part be used for by by the treated air in the temperature regulation section and the humidity regulation portion feed to
In the constant temperature and humidity room, the air supplying part sets wind pushing temperature as T1If, the air supplying part set air-supply dew-point temperature as
T2If, the indoor temperature transmitter and the indoor dew point transducer are respectively used to measure the actual room temperature in constant temperature and humidity room
T1SurveyWith actual indoor dew-point temperature T2Survey；
The controller is used for according to T1SurveyWith T1IfDifference △ T1 to T1IfIt is corrected and according to T2SurveyWith T2If's
Difference △ T2 are to T2IfIt is corrected, wherein:
T1School=T1If+ f (△ T1), wherein, △ T1=T1Survey-T1If, △ T1>When 0, f (△ T1)<0, △ T1<When 0, f (△
T1)>0, T1SchoolFor the setting wind pushing temperature after the correction of the air supplying part,
T2School=T2If+ F (△ T2), wherein, △ T2=T2Survey-T2If, △ T2>When 0, F (△ T2)<0, △ T2<When 0, F (△
T2)>0, T2SchoolFor the setting air-supply dew-point temperature after the correction of the air supplying part.
Further, f (△ T1) and F (△ T2) are calculated by the controller by PID respectively.
Further, the humidity regulation portion includes the cooling unit and humidifier being connected respectively with the controller；When
When the constant temperature and humidity system is used to dehumidify, the controller closes the humidifier and controls the cooling unit to work；When
When the constant temperature and humidity system is used to humidify, the controller control closes the cooling unit and controls the humidifier work
Make.
Further, when the constant temperature and humidity system is used to cool and dehumidify, the constant temperature and humidity system passes through described
Cooling unit is cooled and dehumidified；
The cooling unit includes the first heat exchanger tube and the first control valve being arranged on first heat exchanger tube, when respectively
According to the T1SchoolWith the T2SchoolControl first control valve when there are different aperture changing values, the controller is with institute
State T1SchoolWith the T2SchoolIt is middle to make the first control valve opening changing value bigger one to control opening for first control valve
Degree change.
Further, the constant temperature and humidity system also includes fresh wind tube and return air portion, the fresh wind tube and the return air portion
Wind export air inlet respectively with the thermostatic air inlet and the humidity control apparatus and connect.
Further, it is provided with filtration in the fresh wind tube.
Beneficial effects of the present invention are as follows：
Constant temperature and humidity system and its control method provided by the invention, it sets wind pushing temperature and setting air-supply dew-point temperature
It is not fixed, but the difference based on actual room temperature and actual indoor dew-point temperature and the setting value carries out school to the setting value
Just, adjust automatically, using closed-loop automatic control, avoids the operation of constant temperature and humidity system high energy consumption, and overall operation cost is low.
Brief description of the drawings
Fig. 1 is the schematic diagram for the constant temperature and humidity system control method that the preferred embodiment of the present invention one provides.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Preferred embodiment one：
This preferred embodiment provides a kind of control method of constant temperature and humidity system, and this method is specially：
Measure the actual room temperature T1 in constant temperature and humidity roomSurveyWith actual indoor dew-point temperature T2Survey；
According to actual room temperature T1SurveyWith the setting wind pushing temperature T1 of the air supplying part of constant temperature and humidity systemIfDifference △ T1 to T1If
It is corrected：T1School=T1If+ f (△ T1), wherein, △ T1=T1Survey-T1If, △ T1>When 0, f (△ T1)<0, △ T1<When 0, f (△
T1)>0, T1SchoolFor the setting wind pushing temperature after the correction of air supplying part；
According to actual indoor dew-point temperature T2SurveyWith the setting air-supply dew-point temperature T2 of the air supplying part of constant temperature and humidity systemIf's
Difference △ T2 are to T2IfIt is corrected：T2School=T2If+ f (△ T2), wherein, △ T2=T2Survey-T2If, △ T2>When 0, f (△ T2)<0,
△T2<When 0, f (△ T2)>0, T2SchoolFor the setting air-supply dew-point temperature after the correction of air supplying part.
Wherein, f (△ T1) and F (△ T2) can pass through PID (Proportion Integration by controller respectively
Differentiation) it is calculated.PID operation control amount includes proportional unit P, integral unit I and differentiation element D.
Data △ T1 or the △ T2 and a reference value that are collected into are compared in PID arithmetic, then this difference is used to calculate f
(△ T1) or F (△ T2).Wherein, proportional unit P, integral unit I and differentiation element D and reference value can by empirical parameter or
Tuning parameter obtains.
In the present embodiment, for example, as constant temperature and humidity system refrigeration and T1IfAt=22 DEG C, if T1Survey=23 DEG C, △ T=1>
0, now f (△ T1)<0, T1School=22 DEG C of+f (△ T1).I.e. when room temperature is higher, during more than 22 DEG C of setting value, fresh air handining unit
Value that can be less than 22 DEG C is blown, rather than with 22 DEG C of air-supplies.As constant temperature and humidity system refrigeration and T1IfAt=22 DEG C, if T1Survey
=21 DEG C, △ T=1<0, now f (△ T1)>0, T1School=22 DEG C of+f (△ T1).I.e. when room temperature is relatively low, more than 22 DEG C of setting value
When, constant temperature and humidity system can be blown with the temperature value higher than 22 DEG C, rather than with 22 DEG C of air-supplies.
The control method for the constant temperature and humidity system that the present embodiment provides, it sets wind pushing temperature and setting air-supply dew-point temperature
It is not fixed, but the difference based on actual room temperature and actual indoor dew-point temperature and the setting value carries out school to the setting value
Just, adjust automatically, using closed-loop automatic control, avoids the operation of constant temperature and humidity system high energy consumption, and overall operation cost is low.
In the present embodiment, based on the above method, when constant temperature and humidity system is freezed, the setting after air supplying part correction is sent
Air temperature is T1School, when constant temperature and humidity system heats, wind pushing temperature is set as T1 ' after air supplying part correctionSchool, T1 'School=T1School- the
One dead band temperature, 0<First dead band Wen Du≤1 DEG C；When constant temperature and humidity system dehumidifies, the setting air-supply dew point after air supplying part correction
Temperature is T2School, when constant temperature and humidity system humidifies, air-supply dew-point temperature is set as T2 ' after air supplying part correction, T2 'School=T2School- the
Two dead band temperature, 0<Second dead band Wen Du≤1 DEG C.First dead band temperature and the second dead band temperature refer to due to constant temperature and humidity system
The temperature province that can not accurately control, its occurrence can be selected according to the control accuracy of constant temperature and humidity system.
In the present embodiment, based on the above method, constant temperature and humidity system includes cooling unit, works as constant temperature and humidity system
During for cooling and dehumidify, constant temperature and humidity system is cooled and dehumidified by cooling unit；
Cooling unit includes the first heat exchanger tube and the first control valve being arranged on the first heat exchanger tube, when respectively according to T1School
And T2SchoolThe control valve of control first when there are different aperture changing values, controller is with T1SchoolAnd T2SchoolIn make the first control valve open
Degree changing value bigger one controls the aperture of the first control valve to change.
The present embodiment additionally provides a kind of constant temperature and humidity system for being used to realize above-mentioned constant temperature and humidity system control method, its
Temperature regulation section, humidity regulation portion, air supplying part, temperature sensor and the indoor dew being connected including controller and respectively with controller
Point temperature sensor；Air supplying part is used to feed to constant temperature and humidity by the treated air of temperature regulation section and humidity regulation portion
Interior, air supplying part set wind pushing temperature as T1If, air supplying part set air-supply dew-point temperature as T2If, indoor temperature transmitter and
Indoor dew point transducer is respectively used to measure the actual room temperature T1 in constant temperature and humidity roomSurveyWith actual indoor dew-point temperature T2Survey；
Controller is used for according to T1SurveyWith T1IfDifference △ T1 to T1IfIt is corrected and according to T2SurveyWith T2IfDifference
△ T2 are to T2IfIt is corrected, wherein:
T1School=T1If+ f (△ T1), wherein, △ T1=T1Survey-T1If, △ T1>When 0, f (△ T1)<0, △ T1<When 0, f (△
T1)>0, T1SchoolFor the setting wind pushing temperature after the correction of air supplying part,
T2School=T2If+ F (△ T2), wherein, △ T2=T2Survey-T2If, △ T2>When 0, F (△ T2)<0, △ T2<When 0, F (△
T2)>0, T2SchoolFor the setting air-supply dew-point temperature after the correction of air supplying part.
The constant temperature and humidity system that the present embodiment provides, it is not fixed that it, which sets wind pushing temperature and setting air-supply dew-point temperature,
, but the difference based on actual room temperature and actual indoor dew-point temperature and the setting value is corrected, automatically to the setting value
Adjustment, using closed-loop automatic control, avoids the operation of constant temperature and humidity system high energy consumption, and overall operation cost is low.
In the present embodiment, on the basis of said structure, f (△ T1) and F (△ T2) are calculated by controller by PID respectively
Obtain.
In the present embodiment, on the basis of said structure, humidity regulation portion includes the cooling list being connected respectively with controller
Member and humidifier；When constant temperature and humidity system is used to dehumidify, controller closes humidifier and controls cooling unit to work；Work as constant temperature
When constant humidity system is used to humidify, controller control closes cooling unit and controls humidifier to work.When constant temperature and humidity system is used for
During humidification, controller is controlled with T2 'SchoolAs the setting air-supply dew-point temperature after the secondary correction of air supplying part, T2 'School=T2School- the
Two dead band temperature, 0<Second dead band Wen Du≤1 DEG C.
In the present embodiment, on the basis of said structure, temperature regulation section includes the preheating list being connected respectively with controller
Member and hot cell again, preheating unit include the second heat exchanger tube, preheating temperature sensor and be arranged on the second heat exchanger tube second
Control valve, preheating temperature sensor are used for the actual preheating temperature T11 for measuring the second heat exchanger tubeSurvey；Controller is used to change second
The actual preheating temperature T11 of heat pipeSurveyMore than heat exchanger tube setting preheating temperature when reduce the aperture of the second control valve, actual pre-
Hot temperature T11SurveyLess than heat exchanger tube setting preheating temperature when increase the aperture of the second control valve.
In the present embodiment, on the basis of said structure, constant temperature and humidity system also includes fresh wind tube and return air portion, fresh wind tube
The air inlet exported with the wind in return air portion respectively with thermostatic air inlet and humidity control apparatus connects.Fresh air
In pipe preferably but be not limited to be provided with filtration.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed in any way.Based on explanation herein, the technology of this area
Personnel would not require any inventive effort the other embodiments that can associate the present invention, and these modes are fallen within
Within protection scope of the present invention.
Claims (10)
- A kind of 1. control method of constant temperature and humidity system, it is characterised in thatMeasure the actual room temperature T1 in constant temperature and humidity roomSurveyWith actual indoor dew-point temperature T2Survey；According to actual room temperature T1SurveyWith the setting wind pushing temperature T1 of the air supplying part of constant temperature and humidity systemIfDifference △ T1 to T1IfCarry out Correction：T1School=T1If+ f (△ T1), wherein, △ T1=T1Survey-T1If, △ T1>When 0, f (△ T1)<0, △ T1<When 0, f (△ T1)> 0, T1SchoolFor the setting wind pushing temperature after the correction of the air supplying part；According to actual indoor dew-point temperature T2SurveyWith the setting air-supply dew-point temperature T2 of the air supplying part of constant temperature and humidity systemIfDifference △ T2 are to T2IfIt is corrected：T2School=T2If+ F (△ T2), wherein, △ T2=T2Survey-T2If, △ T2>When 0, F (△ T2)<0, △ T2 <When 0, F (△ T2)>0, T2SchoolFor the setting air-supply dew-point temperature after the correction of the air supplying part.
- 2. the control method of constant temperature and humidity system according to claim 1, it is characterised in that f (△ T1) and F (△ T2) points It is not calculated by controller by PID.
- 3. the control method of constant temperature and humidity system according to claim 1, it is characterised in thatWhen constant temperature and humidity system is freezed, wind pushing temperature is set as T1 after the air supplying part correctionSchool,When constant temperature and humidity system heats, wind pushing temperature is set as T1 ' after the air supplying part correctionSchool, T1 'School=T1School- the first is dead Area's temperature, 0<First dead band Wen Du≤1 DEG C；When constant temperature and humidity system dehumidifies, air-supply dew-point temperature is set as T2 after the air supplying part correctionSchool,When constant temperature and humidity system humidifies, air-supply dew-point temperature is set as T2 ' after the air supplying part correction, T2 'School=T2School- the second Dead band temperature, 0<Second dead band Wen Du≤1 DEG C.
- 4. the control method of the constant temperature and humidity system according to any one of claims 1 to 3, it is characterised in that the constant temperature Constant humidity system includes cooling unit, and when the constant temperature and humidity system is used to cool and dehumidify, the constant temperature and humidity system passes through The cooling unit is cooled and dehumidified；The cooling unit includes the first heat exchanger tube and the first control valve for being arranged on first heat exchanger tube, when basis respectively The T1SchoolWith the T2SchoolControl first control valve when there are different aperture changing values, the controller is with described T1SchoolWith the T2SchoolIt is middle to make the first control valve opening changing value bigger one to control the aperture of first control valve Change.
- A kind of 5. constant temperature and humidity system, it is characterised in that the temperature adjustment being connected including controller and respectively with the controller Portion, humidity regulation portion, air supplying part, temperature sensor and indoor dew point temperature sensor；The air supplying part is used to feed to described by the treated air of the temperature regulation section and the humidity regulation portion In constant temperature and humidity room, the air supplying part sets wind pushing temperature as T1If, the air supplying part set air-supply dew-point temperature as T2If, The indoor temperature transmitter and the indoor dew point transducer are respectively used to measure the actual room temperature T1 in constant temperature and humidity roomSurveyWith Actual indoor dew-point temperature T2Survey；The controller is used for according to T1SurveyWith T1IfDifference △ T1 to T1IfIt is corrected and according to T2SurveyWith T2IfDifference △ T2 are to T2IfIt is corrected, wherein:T1School=T1If+ f (△ T1), wherein, △ T1=T1Survey-T1If, △ T1>When 0, f (△ T1)<0, △ T1<When 0, f (△ T1)> 0, T1SchoolFor the setting wind pushing temperature after the correction of the air supplying part,T2School=T2If+ F (△ T2), wherein, △ T2=T2Survey-T2If, △ T2>When 0, F (△ T2)<0, △ T2<When 0, F (△ T2)> 0, T2SchoolFor the setting air-supply dew-point temperature after the correction of the air supplying part.
- 6. constant temperature and humidity system according to claim 5, it is characterised in that f (△ T1) and F (△ T2) are respectively by the control Device processed is calculated by PID.
- 7. constant temperature and humidity system according to claim 5, it is characterised in that the humidity regulation portion include respectively with it is described The cooling unit and humidifier of controller connection；When the constant temperature and humidity system is used to dehumidify, described in the controller closing Humidifier simultaneously controls the cooling unit to work；When the constant temperature and humidity system is used to humidify, the controller control is closed The cooling unit simultaneously controls the humidifier to work.
- 8. according to the constant temperature and humidity system described in any one of claim 5 to 7, it is characterised in that when the constant temperature and humidity system is used When cooling and dehumidifying, the constant temperature and humidity system is cooled and dehumidified by the cooling unit；The cooling unit includes the first heat exchanger tube and the first control valve being arranged on first heat exchanger tube, when according to T1SchoolWith the T2SchoolControl first control valve when there are different aperture changing values, the controller is with the T1SchoolWith The T2SchoolIt is middle to make the first control valve opening changing value bigger one to control the aperture of first control valve to change.
- 9. according to the constant temperature and humidity system described in any one of claim 5 to 7, it is characterised in that the constant temperature and humidity system is also Including fresh wind tube and return air portion, the outlet of the wind in the fresh wind tube and the return air portion respectively with it is described it is thermostatic enter The air inlet of air port and the humidity control apparatus connects.
- 10. constant temperature and humidity system according to claim 9, it is characterised in that be provided with filtration in the fresh wind tube.
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| CN201710930303.7A CN107702284B (en) | 2017-10-09 | 2017-10-09 | Constant temperature and humidity system and control method thereof |
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Cited By (1)
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| CN110645680A (en) * | 2019-10-10 | 2020-01-03 | 南京天加环境科技有限公司 | Humidity control method for constant-temperature and constant-humidity air conditioning system |
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