CN104214911A - Control method of compound PLC (programmable logic controller) air conditioning automatic control system in textile mill - Google Patents
Control method of compound PLC (programmable logic controller) air conditioning automatic control system in textile mill Download PDFInfo
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- CN104214911A CN104214911A CN201410465112.4A CN201410465112A CN104214911A CN 104214911 A CN104214911 A CN 104214911A CN 201410465112 A CN201410465112 A CN 201410465112A CN 104214911 A CN104214911 A CN 104214911A
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Abstract
The invention discloses a control method of a compound PLC (programmable logic controller) air conditioning automatic control system in a textile mill. The method is based on the compound PLC air conditioning automatic system in the textile mill; adjustment is performed by taking the humidity of shop air as a primary object according to a principle of humidity priority; according to a principle of 'increasing low and reducing high' adjustment is performed by sequentially increasing the frequency of equipment with low power consumption to meet production requirements when the humidity of the shop air is lower than a set standard, and adjustment is performed by sequentially reducing the frequency of equipment with high consumption to meet the production requirements when the shop humidity is higher than a set standard. The control method of the compound PLC air conditioning automatic control system in the textile mill further reduces the operation energy consumption of an air conditioning system on the basis that temperature and humidity requirements of a production shop are met, solves the problems of hysteresis quality and high energy consumption of the existing control method, guarantees production technological requirements of the shop, greatly reduces the operation energy consumption of the air conditioning system, and achieves the purposes of high efficiency and energy conservation.
Description
Technical field
The invention belongs to air for air conditioning in textile factories control method field, be specifically related to a kind of control method of textile mills combined type PLC automatic control system of air conditioner.
Background technology
Current textile mills PLC automatic control system of air conditioner can only make corresponding adjustment according to actual production conditions to blower fan frequency and water pump frequency in limited scope, but there is certain hysteresis quality and the feature of high energy consumption in this adjustment, so existing textile mills PLC automatic control system of air conditioner is difficult to reach energy-efficient object.
Summary of the invention
The object of the present invention is to provide a kind of control method of textile mills combined type PLC automatic control system of air conditioner, solve existing control method and there is hysteresis quality and the high problem of energy consumption.
The technical solution adopted in the present invention is: the control method of textile mills combined type PLC automatic control system of air conditioner, based on textile mills combined type PLC automatic control system of air conditioner, according to " humidity is preferential " principle, the humidity of workshop air is regulated as primary object; According to " increasing little subtracting greatly " principle, when the humidity of workshop air is lower than the standard set, carry out adjustment compared with the frequency of skinny device meet Production requirement by increasing power consumption successively, when the standard of workshop humidity higher than setting, carry out adjustment compared with the frequency of large equipment meet Production requirement by reducing power consumption successively.
Feature of the present invention is also,
Textile mills' combined type PLC automatic control system of air conditioner is set as that three kinds of different operating modes regulate targetedly to air-conditioning system:
(1), during summer condition, spray chamber adopts two-stage spray to process air, and the first order is water circulating pump, and the second level adopts chilled water pump; According to " humidity is preferential " principle using the primary control object of the humidity in workshop as control loop, when workshop actual humidity is less than setting value, regulate the equipment that operation energy consumption is ascending successively, the air quantity namely first increasing the wind that water capacity is larger in wind mixed chamber, the frequency increasing water circulating pump frequency again, finally increase breeze fan; Otherwise the equipment regulating operation energy consumption descending successively when workshop actual humidity is greater than setting value, namely reduces the air quantity of the wind that water capacity is larger in breeze fan frequency, water circulating pump frequency and wind mixed chamber successively;
Secondly, for the control of workshop temperature, the temperature in workshop is controlled by controlling chilled water pump, when workshop temperature is lower than the temperature set, then chilled water pump is out of service, workshop temperature is allowed naturally to be warmed up to setting value, as necessary by the ratio regulating new air regulator volume damper and return wind transom volume damper to come resh air requirement in adjusting mixed air room and return air amount; When workshop temperature is higher than the temperature set, then chilled water pump is opened, until when workshop temperature reaches design temperature, chilled water pump is out of service;
(2) during transition season operating mode, control route with reference to summer condition, close the inlet valve of chilled water pump, use water circulating pump and chilled water pump spray process air; Control for humidity: when workshop actual humidity is lower than setting humidity, increase the air quantity mixing the larger wind of wind water capacity in wind mixed chamber, the frequency increasing water circulating pump and chilled water pump successively, increase breeze fan frequency, workshop humidity is increased until the scope of setting; When workshop humidity is higher than setting value, reduce the frequency of breeze fan frequency, water circulating pump and chilled water pump successively, reduce to mix in wind mixed chamber the air quantity of the larger wind of wind water capacity, make workshop humidity reach setting value;
On the basis meeting humidity requirement, again temperature is regulated: when workshop temperature is higher than design temperature, then opening large new air regulator volume damper makes new wind air quantity increase gradually, turning down return wind transom volume damper makes return air air quantity reduce gradually, until reach workshop design temperature, if but new air regulator volume damper is opened and still can not be met the demands to when maximum, then increase water circulating pump and the frequency of chilled water pump, the frequency of breeze fan successively, until temperature reaches requirement; When workshop temperature is lower than design temperature, then turning down new air regulator volume damper makes new wind air quantity reduce gradually, opening large return wind transom volume damper makes return air air quantity increase gradually, until reach workshop design temperature, if but increase to 90% in the aperture of return wind transom volume damper, the aperture of new air regulator volume damper still can not meet the demands when being decreased to 10%, then reduce the frequency of breeze fan successively, reduce the frequency of water circulating pump and chilled water pump, until temperature reaches requirement;
(3) during winter condition, close the chilled water valve of chilled water pump, use water circulating pump and chilled water pump process air; For the control of workshop moisture temperature, principle according to " humidity is preferential " and " increasing little subtracting greatly ": when workshop humidity is lower than setting value, first increase the air quantity of the wind that water capacity is larger in wind mixed chamber, the frequency of the water circulating pump of spray chamber is just increased if can not meet the demands, until water circulating pump frequency reaches maximum rating, if can't meet the demands, just increase breeze fan frequency until workshop humidity reaches requirement; When workshop humidity is higher than setting value, just reduce the frequency of breeze fan and water circulating pump successively, maximum using is to the adjustment of resh air requirement in wind mixed chamber and return air amount ratio; Control for temperature is equally also carry out on the basis of humidity regulation, when workshop temperature is lower than setting value, except increasing the air quantity of return air in wind mixed chamber, also usually use the mode of auxiliary heating to heat wind mixed chamber's air, thus raise workshop temperature; For workshop temperature higher than operating mode during design temperature, disregard.
Textile mills' combined type PLC automatic air conditionning comprises return airway, return airway connects return air chamber by return air fan, return air chamber connects wind mixed chamber, return wind transom is provided with between return air chamber and wind mixed chamber, wind mixed chamber side connects new air compartment, opposite side connects spray chamber, and new air compartment is provided with new air regulator, and spray chamber connects plenum chamber, plenum chamber connects supply air duct by breeze fan, and return air fan, return wind transom, spray chamber, new air regulator, breeze fan are all connected with PLC.
Return airway is communicated with workshop respectively with supply air duct, and be provided with workshop humidity tester and workshop temperature measuring device in workshop, workshop humidity tester is all connected with PLC with workshop temperature measuring device.
Be provided with between wind mixed chamber with spray chamber and mix wind filter.
Mixing wind filter mix wind humidity tester and mix air temperature tester with being provided with between spray chamber, mixes wind humidity tester and mixes air temperature tester and be all connected with PLC.
New air compartment is also provided with new wind humidity tester and new air temperature tester, and new wind humidity tester is connected with the even PLC of new air temperature tester.
Spray chamber is connected to water circulating pump and chilled water pump, and water circulating pump is connected with PLC by water circulating pump frequency converter, and chilled water pump is connected with PLC by chilled water pump frequency converter.
Be provided with return air fan frequency converter between return air fan and PLC, between return wind transom and PLC, be provided with return wind transom volume damper, be newly provided with new air regulator volume damper between air regulator and PLC, between breeze fan and PLC, be provided with breeze fan frequency converter.
The invention has the beneficial effects as follows: the control method of textile mills combined type PLC automatic control system of air conditioner of the present invention, different to air-conditioning system demand in Various Seasonal for textile mills workshop on the one hand, and multi-state operation control route is set to meet efficient control overflow in actual production process; Use the control mode of " humidity is preferential " principle and " increasing little subtracting greatly " principle on the other hand, on the basis that the temperature and humidity meeting workshop requires, the energy consumption that further reduction air-conditioning system is run, solve existing control method and there is hysteresis quality and the high problem of energy consumption, ensure that the manufacturing technique requirent in workshop, greatly reduce the energy consumption that air-conditioning system is run, reach energy-efficient object.
Accompanying drawing explanation
The structural representation of Tu1Shi textile mills combined type PLC automatic control system of air conditioner;
The control flow chart in summer of the control method of Tu2Shi textile mills of the present invention combined type PLC automatic control system of air conditioner;
The control flow chart in excessive season of the control method of Tu3Shi textile mills of the present invention combined type PLC automatic control system of air conditioner;
The control flow chart in winter of the control method of Tu4Shi textile mills of the present invention combined type PLC automatic control system of air conditioner.
In figure, 1. return air chamber, 2. return air fan, 3. return airway, 4. new air compartment, 5. wind mixed chamber, 6. plenum chamber, 7. breeze fan, 8. supply air duct, 9. water circulating pump, 10. chilled water pump, 11. return wind transom volume dampers, 12. new air regulator volume dampers, 13. water circulating pump frequency converters, 14. chilled water pump frequency converters, 15. new air regulators, 16. return wind transoms, 17. mixing wind filters, 18. breeze fan frequency converters, 19. return air fan frequency converters, 20. new air temperature testers, 21. new wind humidity testers, 22. mixing air temperature testers, 23. mixing wind humidity testers, 24. workshop temperature measuring devices, 25. workshop humidity testers, 26. spray chambers, 27.PLC controller.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The control method of textile mills combined type PLC automatic control system of air conditioner of the present invention, based on textile mills combined type PLC automatic control system of air conditioner, as shown in Figure 1, comprise return airway 3, return airway 3 connects return air chamber 1 by return air fan 2, return air chamber 1 connects wind mixed chamber 5, return wind transom 16 is provided with between return air chamber 1 and wind mixed chamber 5, wind mixed chamber 5 side connects new air compartment 4, opposite side connects spray chamber 26, be provided with between wind mixed chamber 5 with spray chamber 26 and mix wind filter 17, mixing wind filter 17 mix wind humidity tester 23 and mixes air temperature tester 22 with being provided with between spray chamber 26, mixing wind humidity tester 23 is all connected with PLC 27 with mixing air temperature tester 22, new air compartment 4 is provided with new air regulator 15, spray chamber 26 connects plenum chamber 6, plenum chamber 6 connects supply air duct 8 by breeze fan 7, return air fan 2, return wind transom 16, spray chamber 26, new air regulator 15, breeze fan 7 is all connected with PLC 27, return airway 3 is communicated with workshop respectively with supply air duct 8, and be provided with workshop humidity tester 25 and workshop temperature measuring device 24 in workshop, workshop humidity tester 25 is all connected with PLC 27 with workshop temperature measuring device 24,
New air compartment 4 is also provided with new wind humidity tester 21 and new air temperature tester 20, and new wind humidity tester 21 and new air temperature tester 20 evenly PLC 27 are connected;
Spray chamber 26 is connected to water circulating pump 9 and chilled water pump 10, and water circulating pump 9 is connected with PLC 27 by water circulating pump frequency converter 13, and chilled water pump 10 is connected with PLC 27 by chilled water pump frequency converter 14;
Be provided with return air fan frequency converter 19 between return air fan 2 and PLC 27, between return wind transom 16 and PLC 27, be provided with return wind transom volume damper 11, be newly provided with new air regulator volume damper 12 between air regulator 15 and PLC 27, between breeze fan 7 and PLC 27, be provided with breeze fan frequency converter 18.
The control method of textile mills combined type PLC automatic control system of air conditioner, according to " humidity is preferential " principle, regulates workshop air water capacity as primary object; According to " increasing little subtracting greatly " principle, when the humidity of workshop air is lower than the standard set, carry out adjustment compared with the frequency of skinny device meet Production requirement by increasing power consumption successively, when the standard of workshop humidity higher than setting, carry out adjustment compared with the frequency of large equipment meet Production requirement by reducing power consumption successively.
PLC automatic control system of air conditioner is set as three kinds of different operating modes regulate targetedly to air-conditioning system:
In PLC 27, setting meets the concrete numerical value of the temperature and humidity of the different duty requirements air of workshop, the temperature and humidity of new air temperature tester 20 and the outer new wind of new wind humidity tester 21 difference measuring cell; Mixing air temperature tester 22 and mixing wind humidity tester 23 measure the temperature and humidity of the mixing wind of new wind and return air composition; Workshop temperature measuring device 24 and workshop humidity tester 25 measure the humidity and temperature of workshop respectively; Become fiduciary level signal by input interface the instant data transformations collected, through PLC 27 result is transformed into can executive signal by regulate new air regulator volume damper 12 control new air regulator 15 aperture, regulate return wind transom volume damper 11 control return wind transom 16 aperture, regulate breeze fan frequency converter 18 control breeze fan 7 frequency, regulate return air fan frequency converter 19 control return air fan 2 frequency, regulate the frequency of water circulating pump frequency converter 13 controlled circulation water pump 9, regulate chilled water pump frequency converter 14 to control the frequency of chilled water pump 10.
(1), as shown in Figure 2, during summer condition, spray chamber 26 adopts two-stage to spray and processes air, and the first order is water circulating pump 9, and the second level adopts chilled water pump 10.According to " humidity is preferential " principle using the primary control object of the humidity in workshop as control loop, the mode controlling workshop humidity has three kinds, is distinguished the ratio of new wind and return air in adjusting mixed air room 5 by PLC 27, is regulated the frequency of water circulating pump 9 frequency and breeze fan 7; Control circuit departs from according to workshop actual humidity direction and the degree of setting humidity, controls route and can be divided into two kinds: a kind of actual humidity being workshop humidity tester 25 measures is less than setting value; Another actual humidity being workshop humidity tester 25 measures is greater than setting value.In conjunction with " increasing little subtracting greatly " principle, when workshop actual humidity is less than setting value, in order to increase the humidity in workshop, need the frequency increasing the air quantity of the wind that water capacity is larger in wind mixed chamber 5, the frequency increasing water circulating pump 9, increase breeze fan 7, need the equipment regulating operation energy consumption ascending successively, the frequency namely first increase the air quantity of the wind that water capacity is larger in wind mixed chamber 5, increasing water circulating pump 9 frequency again, finally increase breeze fan 7; Otherwise the equipment regulating operation energy consumption descending successively when workshop actual humidity is greater than setting value, namely reduces the air quantity of the wind that water capacity is larger in breeze fan 7 frequency, water circulating pump 9 frequency, wind mixed chamber 5 successively;
Secondly, for the control of workshop temperature, due to the coupled relation of temperature and humidity, so the adjustment in conjunction with humidity carried out the adjustment of temperature, when regulating workshop humidity, workshop temperature also can increase with humidity and reduce, humidity reduces and raises, so when humidity meets Production requirement then needs wet intensification or cooling are carried out etc. to workshop, water circulating pump 9 is for humidifying air, and chilled water pump 10 pairs of air carry out dehumidifying and cooling.Summer outdoor fresh air enthalpy be larger than the enthalpy of workshop air in most time.Therefore the regulative mode that primary responsibility controls workshop temperature in summer is the temperature that operating condition by controlling chilled water pump 10 controls workshop, when the workshop temperature that workshop temperature measuring device 24 measures is lower than the temperature set, then chilled water pump 10 is out of service, workshop temperature is allowed naturally to be warmed up to setting value, as necessary by the ratio regulating new air regulator volume damper 12 and return wind transom volume damper 11 to come resh air requirement in adjusting mixed air room 5 and return air amount; When the workshop temperature that workshop temperature measuring device 24 measures is higher than the temperature set, then chilled water pump 10 is opened, and runs under the state that frequency is 25Hz, until when workshop temperature reaches design temperature, chilled water pump 10 is out of service;
(2) as shown in Figure 3, during spring and autumn transition season operating mode, control route with reference to summer condition, close the chilled water inlet valve of chilled water pump 10, use water circulating pump 9 and chilled water pump 10 to spray process air.First, humidity is controlled: when the workshop actual humidity that workshop humidity tester 25 measures is lower than setting humidity, increase the air quantity mixing the larger wind of wind water capacity in wind mixed chamber 5, the frequency increasing water circulating pump 9 and chilled water pump 10 successively, increase breeze fan 7 frequency, workshop humidity is increased until the scope of setting; When the workshop humidity that workshop humidity tester 25 measures is higher than setting value, reduces the frequency of breeze fan 7 frequency, water circulating pump 9 and chilled water pump 10 successively, reduce to mix in wind mixed chamber 5 air quantity of the larger wind of wind water capacity, make workshop humidity reach setting value;
On the basis meeting humidity requirement, again temperature is regulated: when the temperature that workshop temperature measuring device 24 measures is higher than design temperature, then opening large new air regulator volume damper 12 makes new wind air quantity increase gradually, turning down return wind transom volume damper 11 makes return air air quantity reduce gradually, until reach workshop design temperature, if but new air regulator volume damper 12 is opened and still can not be met the demands to when maximum, then increase water circulating pump 9 and the frequency of chilled water pump 10, the frequency of breeze fan 7 successively, until temperature reaches requirement; When the temperature that workshop temperature measuring device 24 measures is lower than design temperature, then turning down new air regulator volume damper 12 makes new wind air quantity reduce gradually, opening large return wind transom volume damper 11 makes return air air quantity increase gradually, until reach workshop design temperature, if but increase to 90% in the aperture of return wind transom volume damper 11, the aperture of new air regulator volume damper 12 still can not meet the demands when being decreased to 10%, then reduce the frequency of breeze fan 7 successively, reduce the frequency of water circulating pump 9 and chilled water pump 10, until temperature reaches requirement;
(3) as shown in Figure 4, during winter condition, close the chilled water valve of chilled water pump 10, use water circulating pump 9 and chilled water pump 10 to process air.For the control of workshop moisture temperature, principle according to " humidity is preferential " and " increasing little subtracting greatly ": when the workshop humidity that workshop humidity tester 25 measures is lower than setting value, first increase the air quantity of the wind that water capacity is larger in wind mixed chamber 5, just the water circulating pump 9 of spray chamber 26 and the frequency of chilled water pump 10 is increased if can not meet the demands, until water circulating pump 9 and chilled water pump 10 frequency reach maximum rating, if can't meet the demands, just increase breeze fan 7 frequency until workshop humidity reaches requirement; When the workshop humidity that workshop humidity tester 25 measures is higher than setting value, just reduce the frequency of breeze fan 7, water circulating pump 9 and chilled water pump 10 successively, maximum using is to the adjustment of resh air requirement in wind mixed chamber 5 and return air amount ratio; For the control of temperature, be equally also carry out on the basis of humidity regulation; Outdoor temperature is lower than workshop temperature in the winter time, so, when the workshop temperature that workshop temperature measuring device 24 measures is lower than design temperature, except increasing the air quantity of return air in wind mixed chamber 5, also usually use the mode of auxiliary heating to heat wind mixed chamber 5 air, thus raise workshop temperature; For workshop temperature measuring device 24 measure workshop temperature higher than operating mode during design temperature, disregard.
Embodiment
The selected control and regulation of certain Workshop air conditioner system to workshop air humiture are described in detail.
Selected workshop actual humidity is less than this operating mode of setting value.First, setting workshop relative humidity is 55%, and actual humidity is
be divided into four humidity ranges, it controls route and is respectively: (1)
namely when the relative humidity in workshop differs less than 1% with setting value, then lower a moment, air-conditioning equipment kept original duty.(2)
when relative humidity than setting value difference 1% ~ 3% time, then new air regulator 15 closes 10% in every 5 seconds, and return wind transom 16 opens 10% in every 5 seconds simultaneously, in order to ensure a certain amount of resh air requirement, until new air regulator 15 aperture be 10% and the aperture of return wind transom 16 be 90%.During this period, the actual humidity in workshop all can collect one group of data, when the relative humidity in workshop reach setting value fluctuate be 1% scope in, then new air regulator 15 and return wind transom 16 no longer change, and keep the aperture of eve.Still can not meet the demands if return wind transom 16 reaches relative humidity between maximum opening rear car, then start water circulating pump 9 and chilled water pump 10, the low-limit frequency that water circulating pump 9 and chilled water pump 10 are opened is 25Hz, within every 20 seconds, increase 5Hz, regulate the same with new air regulator 15, return wind transom 16, when the relative humidity in workshop meets the demands, the frequency of water circulating pump 9 no longer changes.When the frequency of water circulating pump 9 and chilled water pump 10 reaches maximum, the relative humidity in workshop does not still meet the demands, then breeze fan 7 increases 5Hz in every 20 seconds, if relative humidity meets the demands, breeze fan 7 frequency then no longer changes, if can not meet the demands, breeze fan 7 reaches peak frequency.(3)
when relative humidity is within the scope of this, new air regulator 15 aperture directly closes 10%, return wind transom 16 reaches maximum, water circulating pump 9 and chilled water pump 10 increase 5Hz in every 20 seconds on original basis simultaneously, until the frequency of water circulating pump 9 and chilled water pump 10 is 50Hz, if the actual humidity in workshop still can not meet the demands, then the frequency of breeze fan 7 also increases 5Hz in every 20 seconds on original basis, if the relative humidity in workshop can meet the demands, breeze fan 7 frequency no longer changes, if can not meet the demands, breeze fan 7 reaches peak frequency.(4)
if workshop relative humidity is at this range section, new air regulator 15 aperture directly closes 10%, return wind transom 16 reaches maximum, water circulating pump 9 and chilled water pump 10 frequency are 50Hz, breeze fan 7 increases 5Hz in every 20 seconds on original basis, if the relative humidity in workshop can meet the demands, breeze fan 7 frequency remains unchanged, if can not meet the demands, till breeze fan 7 reaches the frequency satisfied condition.
Control for temperature carries out on the basis meeting humid control, workshop desired temperature is 28 DEG C, actual workshop temperature is t, the control route of four temperature ranges is: (1) 24 DEG C of < t≤28 DEG C, and the ratio of resh air requirement and return air amount in adjusting mixed air room 5 first can be adopted to regulate workshop temperature.Namely when workshop temperature is lower than outdoor temperature, the wind ratio that in mixing wind, temperature is higher increases gradually, if can not meet the demands, uses ancillary heating equipment to heat mixing wind spray chamber 26 sections.(2) 28 DEG C of < t≤32 DEG C, if when workshop temperature reaches this scope, first adopt the change new wind of wind mixed chamber 5 and the ratio of return air to regulate workshop temperature.When regulating new wind and return air ratio can not meet Production requirement, if when outdoor temperature is higher than workshop temperature, use chilled water pump 10.For chilled water pump 10, if are halted states at eve chilled water pump 10, then chilled water pump 10 still keeps stopping; If the frequency that eve chilled water pump 10 operates is 25Hz, then chilled water pump 10 directly stops, if be greater than 25Hz, then within every 20 seconds, reduces 1Hz, until directly stop when the frequency of chilled water pump 10 is 25Hz.When outdoor temperature is lower than workshop temperature, close the chilled water valve of chilled water pump 10, use water circulating pump 9 and chilled water pump 10 two stage cycle Water spray section instead and to be processed air for humidification, ruuning situation is with reference to chilled water pump.(3) 32 DEG C of < t≤35 DEG C when workshop temperature reaches this scope, if eve chilled water pump 10 stops, then start chilled water pump 10 directly to frequency be 25Hz, and every 20 seconds increase 1Hz; If chilled water pump 10 is run at eve, but frequency is less than 50Hz, then within every 20 seconds, increase 1Hz, until workshop temperature meets the demands or chilled water pump 10 frequency is 50Hz; If eve chilled water pump 10 running frequency is 50Hz, then chilled water pump 10 running status remains unchanged, until temperature satisfies the demands.(4) t > 35 DEG C, when workshop temperature reaches this scope, no matter whether chilled water pump 10 operates at eve, all will start and rise to 50Hz gradually.If still can not meet the demands, then increase breeze fan 7 frequency further, until satisfied temperature requirement.
Compared with the control method of existing textile mills PLC Air-conditioning system, the invention has the beneficial effects as follows:
(1) feature of the control method process for producing workshop condition response lag of the textile mills PLC automatic control system of air conditioner of relatively existing use, the present invention is to the different duty requirements of Various Seasonal, carry out concrete, that specific aim is stronger control thinking, response can be made to workshop change fast;
(2) to compare the control method of textile mills PLC automatic control system of air conditioner of existing use, process for producing workshop condition operation energy consumption is too high, the present invention adopts the control thinking of " humidity is preferential " and " increasing little subtracting greatly ", greatly can reduce the energy consumption that air-conditioning system is run.
Claims (9)
1. the control method of textile mills combined type PLC automatic control system of air conditioner, is characterized in that, based on textile mills combined type PLC automatic control system of air conditioner, according to " humidity is preferential " principle, the humidity of workshop air is regulated as primary object; According to " increasing little subtracting greatly " principle, when the humidity of workshop air is lower than the standard set, carry out adjustment compared with the frequency of skinny device meet Production requirement by increasing power consumption successively, when the standard of workshop humidity higher than setting, carry out adjustment compared with the frequency of large equipment meet Production requirement by reducing power consumption successively.
2. the control method of textile mills combined type PLC automatic control system of air conditioner as claimed in claim 1, is characterized in that, textile mills' combined type PLC automatic control system of air conditioner is set as that three kinds of different operating modes regulate targetedly to air-conditioning system:
(1), during summer condition, spray chamber (26) adopts two-stage spray to process air, and the first order is water circulating pump (9), and the second level adopts chilled water pump (10); According to " humidity is preferential " principle using the primary control object of the humidity in workshop as control loop, when workshop actual humidity is less than setting value, regulate the equipment that operation energy consumption is ascending successively, the air quantity namely first increasing the wind that water capacity is larger in wind mixed chamber (5), the frequency increasing water circulating pump (9) frequency again, finally increase breeze fan (7); Otherwise, the equipment regulating operation energy consumption descending successively when workshop actual humidity is greater than setting value, namely reduces the air quantity of the wind that water capacity is larger in breeze fan (7) frequency, water circulating pump (9) frequency and wind mixed chamber (5) successively;
Secondly, for the control of workshop temperature, the temperature in workshop is controlled by controlling chilled water pump (10), when workshop temperature is lower than the temperature set, then chilled water pump (10) is out of service, workshop temperature is allowed naturally to be warmed up to setting value, as necessary by the ratio regulating new air regulator volume damper (12) and return wind transom volume damper (11) to come resh air requirement in adjusting mixed air room (5) and return air amount; When workshop temperature is higher than the temperature set, then chilled water pump (10) is opened, until when workshop temperature reaches design temperature, chilled water pump (10) is out of service;
(2) during transition season operating mode, control route with reference to summer condition, close the inlet valve of chilled water pump (10), use water circulating pump (9) and chilled water pump (10) spray process air; Control for humidity: when workshop actual humidity is lower than setting humidity, increase the air quantity of the wind that mixing wind water capacity is larger in wind mixed chamber (5), the frequency increasing water circulating pump (9) and chilled water pump (10), increase breeze fan (7) frequency successively, workshop humidity is increased until the scope of setting; When workshop humidity is higher than setting value, reduce the frequency of breeze fan (7) frequency, water circulating pump (9) and chilled water pump (10) successively, reduce the air quantity of the wind that mixing wind water capacity is larger in wind mixed chamber (5), make workshop humidity reach setting value;
On the basis meeting humidity requirement, again temperature is regulated: when workshop temperature is higher than design temperature, then opening large new air regulator volume damper (12) makes new wind air quantity increase gradually, turning down return wind transom volume damper (11) makes return air air quantity reduce gradually, until reach workshop design temperature, if but new air regulator volume damper (12) is opened and still can not be met the demands to when maximum, then increase the frequency of the frequency of water circulating pump (9) and chilled water pump (10), breeze fan (7) successively, until temperature reaches requirement, when workshop temperature is lower than design temperature, then turning down new air regulator volume damper (12) makes new wind air quantity reduce gradually, opening large return wind transom volume damper (11) makes return air air quantity increase gradually, until reach workshop design temperature, if but increase to 90% in the aperture of return wind transom volume damper (11), the aperture of new air regulator volume damper (12) still can not meet the demands when being decreased to 10%, then reduce the frequency of breeze fan (7) successively, reduce the frequency of water circulating pump (9) and chilled water pump (10), until temperature reaches requirement,
(3) during winter condition, close the chilled water valve of chilled water pump (10), use water circulating pump (9) and chilled water pump (10) process air; For the control of workshop moisture temperature, principle according to " humidity is preferential " and " increasing little subtracting greatly ": when workshop humidity is lower than setting value, first increase the air quantity of the wind that water capacity is larger in wind mixed chamber (5), the frequency of the water circulating pump (9) just increasing spray chamber (26) if can not meet the demands, until water circulating pump (9) frequency reaches maximum rating, if can't meet the demands, just increase breeze fan (7) frequency until workshop humidity reaches requirement; When workshop humidity is higher than setting value, just reduce the frequency of breeze fan (7) and water circulating pump (9) successively, maximum using is to the adjustment of the middle resh air requirement of wind mixed chamber (5) and return air amount ratio; Control for temperature is equally also carry out on the basis of humidity regulation, when workshop temperature is lower than setting value, except increasing the air quantity of return air in wind mixed chamber (5), also usually use the mode of auxiliary heating to heat wind mixed chamber (5) air, thus raise workshop temperature; For workshop temperature higher than operating mode during design temperature, disregard.
3. the control method of textile mills combined type PLC automatic control system of air conditioner as claimed in claim 1 or 2, it is characterized in that, described textile mills combined type PLC automatic control system of air conditioner comprises return airway (3), described return airway (3) connects return air chamber (1) by return air fan (2), described return air chamber (1) connects wind mixed chamber (5), return wind transom (16) is provided with between described return air chamber (1) and described wind mixed chamber (5), described wind mixed chamber (5) side connects new air compartment (4), opposite side connects spray chamber (26), described new air compartment (4) is provided with new air regulator (15), described spray chamber (26) connects plenum chamber (6), described plenum chamber (6) connects supply air duct (8) by breeze fan (7), described return air fan (2), return wind transom (16), spray chamber (26), new air regulator (15), breeze fan (7) is all connected with PLC (27).
4. the control method of textile mills combined type PLC automatic control system of air conditioner as claimed in claim 3, it is characterized in that, described return airway (3) is communicated with workshop respectively with supply air duct (8), be provided with workshop humidity tester (25) and workshop temperature measuring device (24) in workshop, described workshop humidity tester (25) is all connected with PLC (27) with workshop temperature measuring device (24).
5. the control method of textile mills combined type PLC automatic control system of air conditioner as claimed in claim 3, is characterized in that, be provided with and mix wind filter (17) between described wind mixed chamber (5) with described spray chamber (26).
6. the control method of textile mills combined type PLC automatic control system of air conditioner as claimed in claim 5, it is characterized in that, described mixing wind filter (17) mixes wind humidity tester (23) and mixes air temperature tester (22) with being provided with between described spray chamber (26), and described mixing wind humidity tester (23) is all connected with PLC (27) with mixing air temperature tester (22).
7. the control method of textile mills combined type PLC automatic control system of air conditioner as claimed in claim 3, it is characterized in that, described new air compartment (4) is also provided with new wind humidity tester (21) and new air temperature tester (20), and described new wind humidity tester (21) and new air temperature tester (20) evenly PLC (27) are connected.
8. the control method of textile mills combined type PLC automatic control system of air conditioner as claimed in claim 3, it is characterized in that, described spray chamber (26) is connected to water circulating pump (9) and chilled water pump (10), described water circulating pump (9) is connected with PLC (27) by water circulating pump frequency converter (13), and chilled water pump (10) is connected with PLC (27) by chilled water pump frequency converter (14).
9. the control method of textile mills combined type PLC automatic control system of air conditioner as claimed in claim 3, it is characterized in that, return air fan frequency converter (19) is provided with between described return air fan (2) and PLC (27), return wind transom volume damper (11) is provided with between return wind transom (16) and PLC (27), new air regulator volume damper (12) is provided with between new air regulator (15) and PLC (27), breeze fan frequency converter (18) is provided with between breeze fan (7) and PLC (27).
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