CN110260431A - Spinning and weaving workshop air conditioner system control method - Google Patents

Spinning and weaving workshop air conditioner system control method Download PDF

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Publication number
CN110260431A
CN110260431A CN201910421346.1A CN201910421346A CN110260431A CN 110260431 A CN110260431 A CN 110260431A CN 201910421346 A CN201910421346 A CN 201910421346A CN 110260431 A CN110260431 A CN 110260431A
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China
Prior art keywords
value
air
relative humidity
frequency
target relative
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CN201910421346.1A
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Chinese (zh)
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CN110260431B (en
Inventor
汪虎明
韩云龙
陆彪
高杰
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JIANGSU JINGYA ENVIRONMENT TECHNOLOGY Co Ltd
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JIANGSU JINGYA ENVIRONMENT TECHNOLOGY Co Ltd
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Priority to CN201910421346.1A priority Critical patent/CN110260431B/en
Publication of CN110260431A publication Critical patent/CN110260431A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0245—Manufacturing or assembly of air ducts; Methods therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/04—Air-mixing units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/54—Free-cooling systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

Spinning and weaving workshop Air-condition system control system of the present invention, Temperature Humidity Sensor detect the temperature value and rh value of current air-conditioned workshopController calculates current air-conditioned workshop water capacity d according to temperature and humidity valueS, judge water capacity dSWith target moisture content dNSize relation Δ d=| (dS‑dN)/dN|；When judging Δ d≤error threshold, the frequency of controller control spray pump remains unchanged；When judging Δ d > error threshold, d is further determined whetherS<dN, controller control spray pump frequency increases until d when beingS=dN；In dS>dNWhen, judge rh valueWith target relative humidity valueSize,When, the frequency that controller controls spray pump reduces until dS=dN,When, the frequency that controller controls spray pump increases until dS=dN, in dS=dNWhen, the frequency of PLC controller control spray pump remains unchanged.

Description

Spinning and weaving workshop air conditioner system control method
Technical field
The present invention relates to system control strategy technical fields, more particularly to a kind of spinning and weaving workshop Air-condition system control side Method.
Background technique
Textile industry is the traditional industries closely related with the people's livelihood and traditional labor-intensive production, with country The continuous adjustment and the continuous improvement of technical level of industrial policy, textile industry are also gradually making the transition to automation direction.Weaving The workshop of enterprise is more demanding to temperature and humidity, to keep constant temperature and humidity under normal circumstances, and even if in the same vehicle Between, with the variation in season and weather, temperature and humidity all can ceaselessly change, and this requires the textile air-conditioners to workshop to carry out constantly Ground adjustment, China are all to be controlled using the method for artificial fuzzy's control the temperature and humidity of spinning and weaving workshop for a long time, this obvious nothing The requirement of method adaptation automated workshop.
And LUWA company, Switzerland (Luo Wa air engineering Co., Ltd) just had developed early in the 1980s it is suitable Close the textile air-conditioner automatic control system of textile air-conditioner characteristic, domestic Henan Hui Yin Ingegneria Ambientale SRL (former name: Zhengzhou Hui Yin air-conditioning Ingegneria Ambientale SRL) and applicant company also textile air-conditioner Automatic Control technology is ground earlier It sends out and achieves certain achievement.But currently used textile air-conditioner control method, such as Chinese invention patent: textile mills are compound As being proposed in the control method (Authorization Notice No.: CN104214911B) of formula PLC automatic control system of air conditioner, according to " wet Degree is preferential " principle, it is adjusted using the humidity in workshop as primary object, temperature is adjusted again after then humidity is met the requirements Section after temperature is met the requirements, the wet heating such as carries out to workshop or waits wet cooling, reach according to the 34th section of the description of its specification To required temperature；But during practical adjustments, due to the coupled relation of temperature and humidity, waits wet heating or wait wet cooling Control process is extremely complex, it is difficult to reach accurate control.
Summary of the invention
The present invention is in view of the problems of the existing technology and insufficient, provides a kind of novel spinning and weaving workshop Air-condition system control Method.
The present invention is to solve above-mentioned technical problem by following technical proposals:
The present invention provides a kind of spinning and weaving workshop Air-condition system control system, it is characterized in that comprising spray chamber, secondary returning Wind channel, air-supply passage, air-conditioned workshop, PLC controller and secondary air mixing channel, the spray chamber lower section are equipped with spray pump, institute The return air in secondary return air channel is stated by leading to the air by spray chamber blowout in secondary mixed wind after secondary return air adjusting window Through mixed gas is sent into air-conditioned workshop by air-supply passage after mixing in road, air-supply passage is equipped with pressure fan, air-conditioned workshop Interior to be equipped with Temperature Humidity Sensor, the spray pump, secondary return air adjusting window, pressure fan and Temperature Humidity Sensor are controlled with PLC Device is connected；
The Temperature Humidity Sensor is used to detect the temperature value and rh value of current air-conditioned workshopAnd it is transmitted to PLC Controller；
The PLC controller is used to calculate the water capacity d of current air-conditioned workshop according to temperature value and rh valueS, Judge water capacity dSWith target moisture content dNSize relation Δ d=| (dS-dN)/dN|；
When judging Δ d≤error threshold, the frequency of PLC controller control spray pump remains unchanged；
When judging Δ d > error threshold, d is further determined whetherS<dN, PLC controller controls spray pump when to be Frequency increases until water capacity dSReach target moisture content dN；
In dS>dNWhen, judge rh valueWith target relative humidity valueSize, in rh valueGreatly In target relative humidity valueWhen, the frequency that PLC controller controls spray pump reduces, until water capacity dSReach target moisture content dN, in rh valueLess than target relative humidity valueWhen, the frequency that PLC controller controls spray pump increases, until containing Moisture dSReach target moisture content dN, in water capacity dSReach target moisture content dNWhen, PLC controller controls the frequency of spray pump It remains unchanged.
Preferably, the PLC controller is used for when judging Δ d≤error threshold, according to rh valueWith mesh Mark rh valueBetween deviation, adjust the frequency of pressure fan or the aperture of secondary return air adjusting window so that relatively wet Angle valueReach target relative humidity value
Preferably, rh valueWith target relative humidity valueBetween deviation when belonging to the first setting range, adjust The frequency of pressure fan is saved so that rh valueReach target relative humidity valueRh valueIt is opposite with target Humidity valueBetween deviation when belonging to the second setting range, adjust the aperture of secondary return air adjusting window so that relative humidity ValueReach target relative humidity valueWherein, the first setting range is greater than the second setting range.
Preferably, judging Δ d > error threshold and dS<dNWhen, according to rh valueWith target relative humidity valueBetween deviation, adjust the frequency of pressure fan or the aperture of secondary return air adjusting window so that rh valueReach mesh Mark rh value
Preferably, rh valueWith target relative humidity valueBetween deviation when belonging to the first setting range, The frequency of pressure fan is adjusted so that rh valueReach target relative humidity valueRh valueWith target phase To humidity valueBetween deviation when belonging to the second setting range, adjust the aperture of secondary return air adjusting window so that relatively wet Angle valueReach target relative humidity valueWherein, the first setting range is greater than the second setting range.
Preferably, judging Δ d > error threshold and dS>dNWhen, according to rh valueWith target relative humidity valueBetween deviation, adjust the frequency of pressure fan or the aperture of secondary return air adjusting window so that rh valueReach mesh Mark rh value
Preferably, rh valueWith target relative humidity valueBetween deviation when belonging to the first setting range, adjust The frequency of pressure fan is saved so that rh valueReach target relative humidity valueRh valueIt is opposite with target Humidity valueBetween deviation when belonging to the second setting range, adjust the aperture of secondary return air adjusting window so that relative humidity ValueReach target relative humidity valueWherein, the first setting range is greater than the second setting range.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention Example.
The positive effect of the present invention is that:
(1) being precisely controlled for spinning workshop epidemic disaster may be implemented, while realizing humid control, temperature obtains simultaneously It is effectively ensured；
(2) water pump is control loop in parallel with pressure fan, when deviation occurs in workshop moisture temperature, is regulated the speed fast, and not It will appear overshoot；
(3) the water capacities line variation such as ventilation state point edge is the realization of air handling process theory, passes through fan delivery of blowing Variation meet the increase and decrease of shop loading, while realizing Fan Energy-saving using fan frequency conversion.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the spinning and weaving workshop Air-condition system control system of present pre-ferred embodiments；
Fig. 2 is the control flow chart of the spinning and weaving workshop Air-condition system control system of present pre-ferred embodiments；
Wherein, 1: fresh air channel, 11: fresh air adjusting window, 12: fresh air Temperature Humidity Sensor, 2: primary retirn air channel, 21: Ground return air channel, 22: ground return air adjusting window, 23: outer suction dirt catcher, 24: blower, 25: ground air draft adjusting window, 26: technique is returned Wind channel, 27: technique return air adjusting window, 28: technique air draft adjusting window, 29: technique return air temperature sensor, 3: spray chamber, 31: Temperature sensor, 32: spray pump, 4: secondary return air channel, 41: secondary return air adjusting window, 5: air-supply passage, 51: pressure fan, 6: Air-conditioned workshop, 61: Temperature Humidity Sensor, 7:PLC controller, 8: air mixing channels, 9: secondary air mixing channel.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present embodiment provides a kind of structural schematic diagram of spinning and weaving workshop Air-condition system control system, it is empty in figure Line show PLC control circuit, and solid line is air duct, and arrow direction is airflow direction.
Spinning and weaving workshop Air-condition system control system includes fresh air channel 1, and fresh air duct 1 and primary retirn air channel 2 pass through one Secondary air mixing channel 8 connects spray chamber 3 after mixing, fresh air channel 1 is equipped with fresh air adjusting window 11, and 11 front end of fresh air adjusting window is equipped with Fresh air Temperature Humidity Sensor 12, fresh air adjusting window 11 and fresh air Temperature Humidity Sensor 12 are connected with PLC controller 7；It is primary to return Wind channel 2 includes ground return air channel 21 and technique return air channel 26, and ground return air channel 21 and technique return air channel 26 are from air-conditioning Workshop 6 is drawn, and ground return air channel 21 is sequentially connected outer suction dirt catcher 23, blower 24, ground return air warp after the extraction of air-conditioned workshop 6 24 transport portion of blower is discharged by ground air draft adjusting window 25, partially enters an air mixing channel 8 by ground return air adjusting window 22, Part enters secondary return air channel 4；Technique return air channel 26 from air-conditioned workshop 6 extraction after be sequentially connected outer suction dirt catcher 23, Blower 24, technique return air temperature sensor 29, technique return air are discharged through 24 transport portion of blower by technique air draft adjusting window 28, Part enters an air mixing channel 8 by technique return air adjusting window 27, partially enters secondary return air channel 4, and blower 24, temperature pass Sensor 29, air draft adjusting window 25, return air adjusting window 22, technique return air adjusting window 27, technique air draft adjusting window 28 and PLC Controller 7 is connected；Spray chamber 3 is made of components such as spraying row, water fender, deflectors, and the outlet side of spray chamber 3 is provided with temperature Sensor 31, lower section are equipped with spray pump 32, and temperature sensor 31 and spray pump 32 are all connected with PLC controller 7；Secondary return air Return air in channel 4 with the air blown out by spray chamber 3 after secondary return air adjusting window 41 in secondary air mixing channel 9 by mixing Through mixed gas is sent into air-conditioned workshop 6 by air-supply passage 5 after conjunction, air-supply passage 5 is equipped with pressure fan 51, air-conditioned workshop 6 It is interior be equipped with Temperature Humidity Sensor 61, secondary return air adjusting window 41, pressure fan 51 and Temperature Humidity Sensor 61 with PLC controller 7 It is connected.
Above-mentioned temperature sensor is all made of the big TOC-T1-W2 for opening up (Vector) of Switzerland, and detection accuracy can achieve ± 0.2 DEG C, Temperature Humidity Sensor using Switzerland it is big open up (Vector) TOC-H1T1 Temperature Humidity Sensor (its temperature detecting precision ± 0.2 DEG C, Humidity Detection precision is for ± 2.3%RH) or using EE210-HT Temperature Humidity Sensor (its temperature inspection of Austria E+E Precision ± 0.2 DEG C is surveyed, Humidity Detection precision is ± 2%RH).
Fig. 2 show the humid control logic chart of spinning and weaving workshop Air-condition system control system of the present invention, is joined by design of workshop Number, that is, the temperature t setN, relative humidityCalculate the water capacity d of corresponding design pointN(calculation formula is referring to Zhou Yasu Etc. " textile mills' air conditioning " (third edition) write), due to spinning workshop moisture dispersed amount very little, it is believed that workshop refrigeration duty master It to be sensible heat load, treated air is along vertical line in ventilation state point, i.e., the water capacities line such as is to indoor design condition point Variation.In automatic control process, ventilation state is determined by the standard humid air psychrometric chart of ECOTECT Software Create this area Point increaseds or decreases the water capacity of air-supply, makes in workshop air humidity content near setting value by changing 32 frequency of spray pump Minor change can guarantee ventilation state point always along the water capacity of design point at this point, need to only change 51 frequency of pressure fan i.e. dNLine changes up and down, and the air-supply burden requirement in workshop is met using the variable air rate function of blower, while meeting workshop humidity, Also the control of temperature is accordingly realized.To realize this function, execution is tactful control as follows:
The Temperature Humidity Sensor 61 is used to detect the temperature value and rh value of current air-conditioned workshopAnd it is transmitted to PLC controller 7.
The PLC controller 7 is used to calculate the water capacity d of current air-conditioned workshop according to temperature value and rh valueS, Judge water capacity dSWith target moisture content dNSize relation Δ d=| (dS-dN)/dN|。
PLC controller 7 is used for when judging Δ d≤error threshold (such as 2%), and the frequency of control spray pump 32 maintains It is constant；Moreover, according to rh valueWith target relative humidity valueBetween deviation, adjust pressure fan 51 frequency or The aperture of secondary return air adjusting window 41 is so that rh valueReach target relative humidity value
Specifically, rh valueWith target relative humidity valueBetween deviation when belonging to the first setting range, adjust The frequency of pressure fan 51 is saved so that rh valueReach target relative humidity valueRh valueWith target phase To humidity valueBetween deviation when belonging to the second setting range, adjust the aperture of secondary return air adjusting window 41 so that opposite Humidity valueReach target relative humidity valueWherein, the first setting range is greater than the second setting range.
PLC controller 7 is used for when judging Δ d > error threshold (such as 2%), further determines whether dS<dN, for 32 frequency of spray pump is controlled when being to increase until water capacity dSReach target moisture content dN；Moreover, according to rh valueWith Target relative humidity valueBetween deviation, adjust pressure fan 51 frequency or secondary return air adjusting window 41 aperture so that Rh valueReach target relative humidity value
Specifically, rh valueWith target relative humidity valueBetween deviation when belonging to the first setting range, adjust The frequency of pressure fan 51 is saved so that rh valueReach target relative humidity valueRh valueWith target phase To humidity valueBetween deviation when belonging to the second setting range, adjust the aperture of secondary return air adjusting window 41 so that opposite Humidity valueReach target relative humidity valueWherein, the first setting range is greater than the second setting range.
PLC controller 7 is used in dS>dNWhen, judge rh valueWith target relative humidity valueSize,When, the frequency of control spray pump 32 reduces, until water capacity dSReach Target moisture content dN, moreover, according to rh valueWith target relative humidity valueBetween deviation, adjust pressure fan 51 Frequency or secondary return air adjusting window 41 aperture so that rh valueReach target relative humidity value
PLC controller 7 is used in dS>dNAndWhen, control spray The frequency of pump 32 increases, until water capacity dSReach target moisture content dN, moreover, according to rh valueIt is opposite with target wet Angle valueBetween deviation, adjust pressure fan 51 frequency or secondary return air adjusting window 41 aperture so that rh valueReach target relative humidity value
PLC controller 7 is used in water capacity dSReach target moisture content dNWhen, the frequency of control spray pump 32 remains unchanged.
Selected control and regulation of a certain textile enterprise's Workshop air conditioner system in Wuxi City, Jiangsu Province to workshop air temperature and humidity It is described in detail.
ECOTECT Software Create psychrometric chart is used according to parameters such as local season, temperature and humidity, atmospheric pressure, selectes spring and autumn Season blowing room, temperature requirement be 24-28 DEG C, relative humidity require be 60-65%RH.Take 26 DEG C of temperature median, it is relatively wet Spending 65%RH is that workshop sets state parameter, is calculated from the formula setting water capacity dNFor 13.6g/kg dry air.
1, one day, workshop observed temperature are 26.5 DEG C, and relative humidity 63%RH is computed water capacity dSFor 13.7g/kg Dry air, Δ d=0.7% (the case where being not more than 2%, and the value of temperature and humidity meets the parameter request of setting), shows shape of blowing State point is located at the d of design pointNLine maintains 32 current operation frequency of spray pump constant at this time.
2, one day, workshop observed temperature are 28 DEG C, and relative humidity 57%RH is computed water capacity dSIt is dry for 13.4g/kg Air, Δ d=1.5% (the case where being not more than 2%, but the value of temperature and humidity does not meet the parameter request of setting), shows shape of blowing State point is located at the d of design pointNLine maintains 32 current operation frequency of spray pump constant at this time.The deviation of relative humidity is to pass through Compare calculating with design value, then PLC automatic program exports a PI value, and secondary return air adjusting window 41 and pressure fan 51 constitute one A sequence control loop, such as the control PI value range of secondary return air adjusting window 41 is 0-0.5, the control PI value model of pressure fan 51 Enclosing is 0.5-1, if PI value in the section 0.5-1, belongs to, deviation is big, then adjusts the frequency of pressure fan 51.If PI value is in the area 0-0.5 Between, then only adjust the aperture of secondary return air adjusting window 41.
3, one day, workshop observed temperature are 26 DEG C, and relative humidity 60%RH is computed water capacity dSIt is dry for 12.6g/kg Air, Δ d=7.4% (the case where being greater than 2%, and the water capacity d in workshopSLess than setting water capacity dN), (spray should be improved at this time Pump frequency is drenched, the water capacity of air-supply is increased, until the workshop relative humidity of actual measurementMeet design requirement) at this point, according to containing wet The size for measuring Δ d deviation calculates PI value by automatic program PLC and increases by 32 frequency of spray pump, while surveying parameter meter by workshop Current water capacity is calculated compared with setting value, PI value adjustment 32 frequency of spray pump is so exported by automatic program until water capacity Meet sets requirement.And the A loop of automatic program calculates corresponding PI value according to the deviation of relative humidity, according to the big of its value The small aperture for automatically controlling pressure fan 51 or secondary return air adjusting window 41.Secondary return air adjusting window 41 and pressure fan 51 constitute one Sequence control loop, such as the control PI value range of secondary return air adjusting window 41 is 0-0.5, the control PI value range of pressure fan 51 It is 0.5-1, if PI value in the section 0.5-1, belongs to, deviation is big, then adjusts the frequency of pressure fan 51.If PI value is in the area 0-0.5 Between, then only adjust the aperture of secondary return air adjusting window 41.
4, one day, workshop observed temperature are 26 DEG C, and relative humidity 70%RH is computed water capacity dSIt is dry for 14.7g/kg Air, Δ d=8.1% (the case where being greater than 2%, and the water capacity d in workshopSGreater than setting water capacity dN, workshop), at this point, being calculated according to the size of Δ d by automatic program PLC PI value reduces 32 frequency of spray pump, while calculating current water capacity compared with setting value by workshop actual measurement parameter, by automatic control Program so exports PI value adjustment 32 frequency of spray pump until water capacity meets sets requirement.If Δ d is within 2%, workshop temperature Humidity is still unsatisfactory for design requirement, then carries out 2 process of case of front.And the A loop of automatic program is according to the inclined of relative humidity Difference calculates corresponding PI value, reduces 51 frequency of pressure fan automatically according to the size of its value or increases secondary return air adjusting window 41 Aperture.Secondary return air adjusting window 41 and pressure fan 51 constitute a sequence control loop, such as the control of secondary return air adjusting window 41 PI value range processed is 0-0.5, and the control PI value range of pressure fan 51 is 0.5-1, if it is big to belong to deviation in the section 0.5-1 for PI value , then the frequency of pressure fan 51 is adjusted.If PI value in the section 0-0.5, only adjusts the aperture of secondary return air adjusting window 41.
5, one day, workshop observed temperature are 29 DEG C, and relative humidity 58%RH is computed water capacity dSIt is dry for 14.7g/kg Air, Δ d=8.1% (the case where being greater than 2%, and the water capacity d in workshopSGreater than setting water capacity dN, workshop), automatic program executes humidity priority strategy, although Δ d is at this time It is greater than 2%, but humidity is less than setting value, so executing humidification automatic program, i.e., relative humidity and setting value is surveyed by workshop Deviation size, by automatic control level calculate PI value increase by 32 frequency of spray pump, meanwhile, by workshop actual measurement parameter calculate currently Relative humidity compared with setting value, PI value adjustment 32 frequency of spray pump is so exported by automatic program until relative humidityIt is full Sufficient sets requirement.The A loop of automatic program calculates corresponding PI value according to the deviation of relative humidity simultaneously, according to the big of its value Small automatic 51 frequency of raising pressure fan or the aperture for reducing secondary return air adjusting window 41.Secondary return air adjusting window 41 and pressure fan 51 A sequence control loop is constituted, such as the control PI value range of secondary return air adjusting window 41 is 0-0.5, the control of pressure fan 51 PI value range is 0.5-1, if PI value in the section 0.5-1, belongs to, deviation is big, then adjusts the frequency of pressure fan 51.If PI value exists The section 0-0.5 then only adjusts the aperture of secondary return air adjusting window 41.
Secondary return air is connected with pressure fan and realizes that sequence control is a control loop A by the realization of humid control logic, By spray pump separately as a control loop B, two loops are simultaneously operation in parallel.A loop is according to relative humidity and design shape The deviation of state relative humidity realizes sequence control, and B loop is controlled according to the frequency that the deviation of water capacity carries out spray pump.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back Under the premise of from the principle and substance of the present invention, many changes and modifications may be made, but these are changed Protection scope of the present invention is each fallen with modification.

Claims (7)

1. a kind of spinning and weaving workshop Air-condition system control system, which is characterized in that it includes spray chamber, secondary return air channel, air-supply Channel, air-conditioned workshop, PLC controller and secondary air mixing channel, the spray chamber lower section are equipped with spray pump, and the secondary return air is logical Return air in road after secondary return air adjusting window with after the air that spray chamber is blown out mixes in secondary air mixing channel by passing through Mixed gas is sent into air-conditioned workshop by air-supply passage, air-supply passage is equipped with pressure fan, is equipped with temperature and humidity in air-conditioned workshop Sensor, the spray pump, secondary return air adjusting window, pressure fan and Temperature Humidity Sensor are connected with PLC controller；
The Temperature Humidity Sensor is used to detect the temperature value and rh value of current air-conditioned workshopAnd it is transmitted to PLC control Device；
The PLC controller is used to calculate the water capacity d of current air-conditioned workshop according to temperature value and rh valueS, judgement contains Moisture dSWith target moisture content dNSize relation Δ d=| (dS-dN)/dN|；
When judging Δ d≤error threshold, the frequency of PLC controller control spray pump remains unchanged；
When judging Δ d > error threshold, d is further determined whetherS<dN, PLC controller control spray pump frequency when to be Increase until water capacity dSReach target moisture content dN；
In dS>dNWhen, judge rh valueWith target relative humidity valueSize, in rh valueGreater than mesh Mark rh valueWhen, the frequency that PLC controller controls spray pump reduces, until water capacity dSReach target moisture content dN, In rh valueLess than target relative humidity valueWhen, the frequency that PLC controller controls spray pump increases, until containing wet Measure dSReach target moisture content dN, in water capacity dSReach target moisture content dNWhen, PLC controller controls the frequency dimension of spray pump It holds constant.
2. spinning and weaving workshop Air-condition system control system as described in claim 1, which is characterized in that the PLC controller is used for When judging Δ d≤error threshold, according to rh valueWith target relative humidity valueBetween deviation, adjusting send The frequency of blower or the aperture of secondary return air adjusting window are so that rh valueReach target relative humidity value
3. spinning and weaving workshop Air-condition system control system as claimed in claim 2, which is characterized in that rh valueWith target Rh valueBetween deviation when belonging to the first setting range, adjust the frequency of pressure fan so that rh value Reach target relative humidity valueRh valueWith target relative humidity valueBetween deviation belong to the second setting model When enclosing, the aperture of secondary return air adjusting window is adjusted so that rh valueReach target relative humidity valueWherein, One setting range is greater than the second setting range.
4. spinning and weaving workshop Air-condition system control system as described in claim 1, which is characterized in that judging Δ d > error threshold Value and dS<dNWhen, according to rh valueWith target relative humidity valueBetween deviation, adjust pressure fan frequency or The aperture of secondary return air adjusting window is so that rh valueReach target relative humidity value
5. spinning and weaving workshop Air-condition system control system as claimed in claim 4, which is characterized in that rh valueWith target Rh valueBetween deviation when belonging to the first setting range, adjust the frequency of pressure fan so that rh value Reach target relative humidity valueRh valueWith target relative humidity valueBetween deviation belong to the second setting model When enclosing, the aperture of secondary return air adjusting window is adjusted so that rh valueReach target relative humidity valueWherein, One setting range is greater than the second setting range.
6. spinning and weaving workshop Air-condition system control system as described in claim 1, which is characterized in that judging Δ d > error threshold Value and dS>dNWhen, according to rh valueWith target relative humidity valueBetween deviation, adjust pressure fan frequency or The aperture of secondary return air adjusting window is so that rh valueReach target relative humidity value
7. spinning and weaving workshop Air-condition system control system as claimed in claim 6, which is characterized in that rh valueWith target Rh valueBetween deviation when belonging to the first setting range, adjust the frequency of pressure fan so that rh value Reach target relative humidity valueRh valueWith target relative humidity valueBetween deviation belong to the second setting model When enclosing, the aperture of secondary return air adjusting window is adjusted so that rh valueReach target relative humidity valueWherein, One setting range is greater than the second setting range.
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