CN100523359C - Energy-saving automatic cut-off method for electric-heating dryer - Google Patents
Energy-saving automatic cut-off method for electric-heating dryer Download PDFInfo
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- CN100523359C CN100523359C CNB2005100053387A CN200510005338A CN100523359C CN 100523359 C CN100523359 C CN 100523359C CN B2005100053387 A CNB2005100053387 A CN B2005100053387A CN 200510005338 A CN200510005338 A CN 200510005338A CN 100523359 C CN100523359 C CN 100523359C
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Abstract
This invention discloses a method of automatic stopping for an electric heating airer including connecting the CPU of the airer and a temperature sensor set in front of the exhaust hole and when the temperature is tested to reach to a designed starting sensing temperature, the temperature control unit begins acting and tests the temperature at definite time intervals till at least two differences composed by three temperature points are below the set difference, it shows the clothes are dry enough and the CPU controls it stopping automatically.
Description
Technical field
The present invention relates to a kind of electrothermal drying technology; refer in particular to a kind of method of province's energy autostop of electric thermal desiccator; the technology of its energy-saving control method comprises the principle of the humidity characteristic of automatic control and electromechanical integration and air; it is applied in dryer or electric thermal desiccator; make its province that reaches autostop energy benefit, and protection clothing (or the thing that is dried) and the saving energy and time.
Background technology
Along with the lifting day by day of people's lives quality, dryer has become the daily living article that each family of China is all afforded.Dryer has only unique shortcoming of power consumption, and all the other make things convenient for, save time, save the space of Clothes Drying and do not have the advantage such as indecency of shining underwear, more and more attract how busy working clan to adopt dryer.Therefore, the demand of dryer in the metropolis is more and more big, and market potential is surprising.
In addition, present drying for costly medicine and chemicals is for preventing to pollute or for asking convenient and safety, also adopt the electric thermal desiccator dryings more.
Secondly, with regard to the oven dry principle of present known dryer (or electric thermal desiccator), it is the dry air that inhaled air is heated as middle high temperature and low relative humidity with electric heating, again with driven the rotating of drying groove by motor and transmission mechanism and make the clothing (or in dry slot, stirring the thing that is dried) of stirring wherein that does not stop with agitator with moisture, the clothing (or the thing that is dried) of band moisture is mixed mutually with the dry air of middle high temperature and low relative humidity, make water evaporates in the clothing (or the thing that is dried) in the heated drying air and air wetting is lowered the temperature, the air that will contain a large amount of steam by pressure differential is discharged dryer (or electric thermal desiccator) again, and gradually with clothing (or the thing that the is dried) drying of humidity.And dryer (or electric thermal desiccator) the heater outage that stops to heat at present or the mode of shutting down all adopt timer-operated mode, estimate drying (or dry) the required time during drying (or dry) roughly and with the time as setting.And when in fact required drying (or the dry) time is than humid climate when dry climate for short.In addition, clothing such as the nylon products (or the thing that is dried) a little less than than water absorbing force is long the required drying time of clothing that water absorbing force is strong such as cotton products (or the thing that is dried).Therefore, the weather of each drying (or dry goods) and the content weight of clothing (or the thing that is dried) are all inequality, that is drying clothes cloth (or the thing content that is dried) difference, oven dry quantity height inequality and outer humidity relatively of machine and temperature is inequality, drying clothes (or the thing that is dried) the needed time also can be inequality fully, so housewife of experience's (or operation electric thermal desiccator technical staff) also can't make correct time control to drying (electrothermal drying) each time and judges again, if time set is long then can cause the unnecessary over-running of dryer (or electric thermal desiccator), so that waste energy and time and superheated cause the damage (or unnecessary over-drying thing that is dried) of clothing; In addition, then can cause clothing (or the thing that is dried) to do inadequately must to set drying (or dry) time running dryer (or electric thermal desiccator) once more, to cause a lot of inconvenience if time set is too short.So during end product drying (or dry) overwhelming majority all be clothing (or the thing that is dried) is done unnecessary over-drying, unnecessary over-running dryer (or electric thermal desiccator) and cause wasting energy and the time.In addition, dryer (or electric thermal desiccator) is the device that expends very much the energy, and in that at present the energy is exhausted day by day, how to save the comfortable convenience that the energy can keep again living simultaneously is the common targets of pursuing in countries in the world always.
Also there is the proposition of related invention patent various countries at this; as BP 1; the control of 470, No. 163 temperature is to be located at by air behind the heater respectively temperature sensor and the position before leaving dryer, when the temperature difference of detecting both reaches default value and make the method for its shutdown.But experimental results show that through us, the temperature of weather and relative humidity, the kind of clothes and weight all can influence both temperature gaps, so the degree that does not have a reliable default value and clothes to do has absolute relation, default value Ding Detai is little may to cause 0 consequence of doing inadequately under strong clothes of the lower temperature of machine outer air and/or higher relative humidity and/or water holding capacity and/or big weight situation, and default value Ding Detaigao may cause over-drying under low clothes and/or the light weight situation at the higher temperature of machine outer air and/or than low relative humidity and/or water holding capacity and waste energy and the time.So this control method usually can be unrealistic in practice, can't commercialization, therefore commercially available dryer does not have this series products.
As for United States Patent (USP) 4,485, No. 566, its recuperation of heat utilizes formula dryer structure as shown in Figure 1, drying cylinder 2 in the body 1, fan 4 is driven by motor 3, machine outer air 5 is introduced in the body 1 via air admission hole 6, elder generation is through the outside of drying cylinder 2 and blast pipe 9, draw the internal heat energy of drying cylinder 2 and blast pipe 9, become preheated air 10, and then lead through motor 3 and cooling motor 3, and itself is heated, and leads heater via 7 again, is heated as hot-air 11 by the adjustable heater 7 that adds temperature, be imported into and make the drying purposes in the drying cylinder 2, this is discharged outside the bodies 1 via blast pipe 9 by the hot humid air 8 of moistening and lowering temperature when very dried (pledge clothes be hot dry air).
And 12 pairs of preheated air 10 detected temperatures of preheated air temperature sensor, United States Patent (USP) 4,485, No. 566 inventor infers that its temperature (T)-time (t) concerns shown in the K1 line among Fig. 2,13 pairs of hot its temperature of humid air 8 sensings of exhaust gas temperature sensor, the inventor of this case infers that its temperature (T)-time (t) is shown in the K3 line among Fig. 1.The K2 line of this case narration Fig. 2 is the graph of a relation of temperature (the T)-time (t) of another kind of structure dryer, but does not further describe its concrete condition, does not talk so can ignore at this.Wherein, 0＜t＜t1 is the drying process, and t1＜t＜t2 is the wrinkle resistant processing procedure that clothes is cooled off fast.Temperature-controlled process is when the temperature difference of K3 line and K1 line increases to the predetermined value of setting, it is the time of t=t1, the expression clothes has reached the degree of enough doing, can at first control the power supply of closing heater by central control unit, but the motor of drying trough roller tube and fan is remained in operation, continue to do wrinkle resistant processing than cold air with the clothes that quick cooling is in high temperature outside the inhalation machine, yet wherein K3 line and K1 line can intersect in the time of t=t2 unexpectedly, obviously be to violate the second law of thermodynamics, because of the K3 line is a higher temperature line, and the K1 line is by the temperature line of the K3 line of high temperature heating, so the temperature difference of K3 line and K1 line is forever greater than zero, when infinitely great, the temperature difference of K3 line and K1 line can equal zero in the time.Can judge that thus this K3 line and K1 line should be irrational temperature-time distributing lines that the inventor infers with the imagination and intuition.When in addition its control method of stopping wrinkle resistant processing is reduced to the predetermined value of plus or minus of setting for the temperature difference when K3 line and K1 line; when being t=t2; represent that promptly clothing has reached the degree of enough coolings, and can close the general supply dead halt by central control unit control.Though negative temperature difference can not be arranged; but if when setting temperature difference when K3 line and K1 line and being reduced to the positive predetermined value of setting; represent that promptly clothing has reached the degree of enough coolings, be still feasible and can control the method for closing the general supply dead halt by central control unit.But so design, still may because of positive predetermined value when too big too short the and wrinkle resistant effect of t2 value not enough, positive predetermined value is hour t2 value oversize over-running again motor and wasting energy and the time too.So this invention case, its least feasible control method should be when t=t1, the heater power-off method when the temperature difference of K3 line and K1 line increases to the predetermined value of setting.And experimental results show that through our real machine, the temperature of weather and relative humidity, the kind of clothes and weight all can influence the temperature gap of K3 line and K1 line, so the degree that does not have a reliable default value and clothes to do has absolute relation, default value Ding Detai is little may to cause the structure of doing inadequately under strong clothes of the lower temperature of machine outer air and/or higher relative humidity and/or water holding capacity and/or big weight situation, and default value Ding Detaigao may cause under low clothes and/or the light weight situation at the higher temperature of machine outer air and/or than low relative humidity and/or water holding capacity and excessively does and waste energy and the time.So this control method usually can be unrealistic in practice, can't commercialization, therefore commercially available dryer does not also have this series products.
Summary of the invention
The technical problem to be solved in the present invention is: the method that a kind of province's energy autostop of electric thermal desiccator is provided; the central control unit that it is provided with by electric thermal desiccator; and link to temperature (or relative humidity) sensor that is provided with before the electric thermal desiccator air outlet; after testing at the variable quantity convergence of setting in blanking time zero (precision that this temperature difference or relative humidity difference can reach with sensing); that is after not had significant change; represent the thing that is dried dry, can control its in good time shutdown.
Another technical problem that the present invention will solve is: the method that a kind of province's energy autostop of electric thermal desiccator is provided; to electric thermal desiccator can shilling heater outage and the motor of dry slot cylinder and fan are remained in operation automatically; continue to do the clothes wrinkle resistant processing of cooling fast; close general supply and dead halt by central control unit control more afterwards, to reach the purpose of saving the energy and the dry thing of protection.
Technical solution of the present invention is: a kind of method of province's energy autostop of electric thermal desiccator; electric thermal desiccator is provided with air intake vent; air outlet; heater; motor; fan; the dry slot cylinder; temperature sensor and central control unit; central control unit is provided with temperature control unit; mainly by the central control unit of electric thermal desiccator and the temperature sensor line that before the air outlet of electric thermal desiccator, is provided with; when reaching the control initial temperature of setting through sensing; the temperature control unit of central control unit begins effect; measure temperature once in per set time; when continuously at least three to measure at least two temperature differences that temperature spots form be in the precision at temperature sensor the time, can control the electric thermal desiccator autostop via central control unit.
The method of province's energy autostop of aforesaid electric thermal desiccator, the precision of temperature sensor can be 0.1 ℃ to 0.5 ℃.
The province of aforesaid electric thermal desiccator can autostop method, the design temperature that begins to act on of temperature control unit is the median of getting the very little maximum temperature of the very little temperature of first section variations in temperature of dry exhaust characteristic temperature-timeline and second section variations in temperature.
The present invention also proposes a kind of method of province's energy autostop of electric thermal desiccator; temperature control unit is measured temperature difference in setting range the time; be to control via central control unit; only make electric thermal desiccator close the power supply of heater; but the motor of dry slot cylinder and fan are remained in operation; at least two temperature differences that variations in temperature before the electric thermal desiccator air outlet is formed at continuous three temperature spots at least are when the precision twice of temperature sensor is following, close general supply and dead halt by central control unit control again.
The present invention also proposes the method for province's energy autostop of another kind of electric thermal desiccator; electric thermal desiccator is provided with air intake vent; air outlet; heater; motor; fan; the dry slot cylinder; relative humidity sensor and central control unit; central control unit is provided with the relative humidity control module; by the central control unit of electric thermal desiccator and the relative humidity sensor line that before the air outlet of electric thermal desiccator, is provided with; when reaching setting relative humidity after testing; the relative humidity control module of central control unit begins effect; measure relative humidity once in per set time; when being in the precision at relative humidity sensor the time in continuous at least three at least two relative humidity differences measuring relative humidity points compositions, can control the electric thermal desiccator autostop via central control unit.
The method of province's energy autostop of aforesaid electric thermal desiccator, the precision of relative humidity sensor can be 0.2% to 1%.
The province of aforesaid electric thermal desiccator can autostop method, the setting relative humidity that begins to act on of relative humidity control module is the median of getting the very little minimum relative humidity of the very little relative humidity of dry exhaust relative humidity-first section relative humidity variations of time response line and second section relative humidity variations.
The present invention also proposes the method for province's energy autostop of another kind of electric thermal desiccator; the relative humidity control module is measured the relative humidity difference in setting range the time; be to control via central control unit; only make electric thermal desiccator close the power supply of heater; but the motor of dry slot cylinder and fan are remained in operation; at least two relative humidity differences that relative humidity variations before the electric thermal desiccator air outlet is formed at continuous three relative humidity points at least are when the precision twice of relative humidity sensor is following, close general supply and dead halt by central control unit control again.
The method of province's energy autostop of aforesaid electric thermal desiccator, described electric thermal desiccator is a dryer.
Characteristics of the present invention and advantage are: the present invention has overcome and has controlled the drying waste of time energy of machine and the defective of time with time controller in the known technology.The present invention controls as temperature with the characteristic of the rational temperature-time distributing line of dryer exhaust and reaches the method that causes the auto controlled heater outage or shut down; not only simple; no matter and the drying machine of any structure (as recuperation of heat dryer and no recuperation of heat dryer) is all practicable, even can be applicable to use the electric thermal desiccator of same principle.It mainly uses drying (or dry) principle of dryer (or electric thermal desiccator), inhaled air is heated as the dry air of middle high temperature and low relative humidity with electric heating, again with driven the rotating of drying groove by motor and transmission mechanism and make the clothing (or in dry slot, stirring the thing that is dried) of stirring wherein that does not stop with agitator with moisture, the clothing (or the thing that is dried) of band moisture is mixed mutually with the dry air of middle high temperature and low relative humidity, water evaporates in the clothing (or the thing that is dried) is in the heated drying air and air wetting is lowered the temperature, the air that will contain a large amount of steam by pressure differential is discharged outside the dryer (or electric thermal desiccator) again, and gradually with clothing (or the thing that the is dried) drying of humidity.When the moisture of clothing (or the thing that is dried) still enough when high, the relative humidity of air-out this moment is saturated 100%, temperature is lower wet-bulb temperature, along with the running of dryer (or electric thermal desiccator) gradually with clothing (or the thing that the is dried) drying of humidity, when clothing (or the thing that is dried) when moisture reduces gradually, promptly cause the relative humidity of the interior air of drying groove (or electric thermal desiccator) to reduce gradually by saturated (100%), and the interior temperature of drying groove (or electric thermal desiccator) raises gradually, when clothing (or the thing that is dried) is absolutely dry, just fully no longer cooling.
Utilize above-mentioned principle; the method of dryer that the present invention proposes or the province of electric thermal desiccator energy autostop; mainly by the central control unit of dryer (or electric thermal desiccator) and temperature sensor (or relative humidity sensor) line that before the air outlet of dryer (or electric thermal desiccator), is provided with; when reach in a certain setting " sensing temperature of initiation " (or when setting " the sensing relative humidity of initiation " through sensing; temperature control unit (or relative humidity control module) begins effect; measure temperature (or relative humidity) once in the set time difference; until at least two temperature differences forming at continuous at least three temperature spots is (or to be when the relative humidity difference of setting is following at least two relative humidity differences of at least three relative humidity points compositions continuously when the temperature difference of setting (temperature difference of this setting is as the criterion with the precision that temperature sensor can reach) is following; the relative humidity difference of this setting is as the criterion with the precision that relative humidity sensor can reach); the expression clothing has reached the degree of enough doing; and can control its autostop by central control unit; in order to avoid waste energy and time and superheated cause the damage (or unnecessary over-drying thing that is dried) of clothing, to reach the protection clothing and to save the energy and the effect of time.The precision that this design temperature poor (or relative humidity is poor) can reach with sensing is a foundation.In addition; also can design and not do the control of shutting down this moment and just earlier heater is cut off the power supply; and the motor and the fan of drying trough roller tube are remained in operation; continue to do the clothes wrinkle resistant processing of cooling fast; when the temperature (or relative humidity) of the position of dryer air outlet before slightly changes below two temperature differences that at least three temperature spots are continuously formed are the temperature difference twice of setting of described in front heater outage control (or below relative humidity difference twice of the setting of foregoing heater outage control) at least; close general supply by central control unit control again and dead halt makes clothes carry out wrinkle resistant processing.The reason that the temperature difference (or relative humidity is poor) that adopts lower accuracy is shut down in wrinkle resistant processing mainly is that the purpose of wrinkle resistant processing is to cool off clothing fast, as long as clothing roughly just can reach certain effect near the outer temperature of machine, needn't excessive operation with the saving energy.
Description of drawings
Fig. 1 is a United States Patent (USP) 4,485, the recuperation of heat dryer structure chart of No. 566 institute's foundations.
Fig. 2 is a United States Patent (USP) 4,485, temperature (T)-time (t) distribution map of air (K1) after recuperation of heat dryer exhaust (K3) that No. 566 inventor inferred and the preheating.
Fig. 3 is the drying principles schematic diagram of dryer or electrical equipment drier.(humidity line chart)
Fig. 4 is the temperature-time distribution map of air (K1) after rational recuperation of heat dryer exhaust (K3) and the preheating.
Fig. 5 is the relevant position schematic diagram in the no recuperation of heat dryer of foundation of the present invention.
Fig. 6 is a control circuit schematic diagram of the present invention.
Fig. 7 is single-chip microprocessor of the present invention and solid-state relay circuit diagram.
Fig. 8 finishes the temperature-time curve figure of outage shutdown control for heater outage control and wrinkle resistant process.
Fig. 9 is control initial temperature T
sBe selected in the definition reference diagram of the median between the dryer air draft highest temperature and the lowest temperature.
The drawing reference numeral explanation:
(known part)
1, body 10, preheated air 11, hot-air
12, preheated air temperature sensor 13, exhaust gas temperature sensor 2, drying cylinder
3, motor 4, fan 5, machine outer air
6, air admission hole 7, heater 8, humid air
9, blast pipe
(part of the present invention)
10, air intake vent 20, air outlet 30, heater
40, motor 50, fan 60, drying trough roller tube
70, temperature sensor 80, relative humidity sensor 90, central control unit
901, temperature control unit 902, relative humidity control module
The specific embodiment
Following conjunction with figs. describes the method that the province of electric thermal desiccator of the present invention can autostop in detail, and is that example is elaborated with the dryer.
At first, the drying of dryer (or electric thermal desiccator) (or dry) principle is shown in the air humidity line chart of Fig. 3, dryer (or electric thermal desiccator) is with inhaled air (state 1), be heated as the dry air (state 2) of middle high temperature and low relative humidity with electric heating, make motor and transmission mechanism drive stir wherein the clothing (or in dry slot in agitator stir be dried thing) with moisture of drying groove rotating again not stop, the clothing (or the thing that is dried) of band moisture is mixed mutually with the dry air of middle high temperature and low relative humidity, make water evaporates in the clothing (or the thing that is dried) in the heated drying air and air wetting is lowered the temperature, to contain outside air (state 3) the discharge dryer (or electric thermal desiccator) of a large amount of steam by pressure differential again, when the moisture of clothing (or the thing that is dried) still enough when high, the relative humidity Φ of state 3
3=100%, the temperature T of state 3
3Temperature T than state 2
2Low.Along with the running of dryer (or electric thermal desiccator) gradually with clothing (or the thing that the is dried) drying of humidity, when clothing (or the thing that is dried) when moisture reduces gradually, the outer air of discharge dryer can't reach the saturation state of the adiabatic humidiflcation of state 3 gradually, by the temperature T of saturation state
3With relative humidity Φ
3=100%, close along wet-bulb temperature line to state 2; Promptly by 3-3 '-3 " 3 " '-2, relative humidity reduces the rh value Φ near state 2 gradually
2, temperature raises gradually near T
2When clothing is absolutely dry, just be equal to state 2 no longer lower the temperature (or the rh value of state 2 no longer raises).By the temperature characterisitic of above dryer (or electric thermal desiccator) exhaust as can be known, when clothing (or the thing that is dried) is absolutely dry, the temperature of dryer exhaust (or electric thermal desiccator) keeps high temperature constant (or rh value keeps minimum no longer to raise), should stop heating this moment, to save the energy and time.
After understanding the dryer principle, and by our cognition with the experimental data of real experiment gained, go out United States Patent (USP) 4 with principle deducibility by thermodynamics and heat conduction, 485, No. 566 inventions utilize the formula dryer according to the recuperation of heat of Fig. 1, the rational result of the K3 line of the K1 line of the temperature of its sensing preheated air (T)-time (t) and the temperature (T) of sensing exhaust-time (t) should be K3 and K1 line shown in Figure 4, but not the aforementioned situation that does not conform in the schematic diagram 1.
K3 among Fig. 4 by with room temperature T
ARelative point 1 begins to be rapidly heated, so the slope that the 1-2 line rises is steeper, the heat temperature raising effect is greater than the effect of wet clothing evaporative cooling at this moment, when heat temperature raising effect and wet clothing evaporative cooling reached balance, the slope of rising eased up and gradually near level, promptly puts 2 positions, this moment, relative humidity was kept near 100%, its temperature maintenance is near wet-bulb temperature, so variations in temperature is little, till the point of arrival 3 positions.Along with the running of dryer gradually with the cloth drying of humidity, when the clothing moisture reduces gradually, discharge the outer air of dryer and can't reach the saturation state of the adiabatic humidiflcation of state 3 gradually, relative humidity reduces gradually and temperature raises gradually, when clothing is absolutely dry, air themperature is increased to the maximum temperature that heater can add, the slope that rises eases up and gradually near level, promptly puts 4 positions, puts the later temperature in 4 positions and no longer changes, shown in 4-5, clothes this moment heats by dried should stopping.So putting 5 positions with heater outage (t=t1).But the motor and the fan of drying trough roller tube are remained in operation, continue in the suction chamber to remove to connect fast the clothes that cooling is in high temperature and do wrinkle resistant processing than cold air, while can be utilized the surplus temperature of clothes to add hot-air again and reduce its relative humidity and can continue to do dry to the position that clothes knuckle place may still do inadequately, the effect of dual drying is arranged, can guarantee the degree of drying of clothes.Because no longer heating; discharge air and begin fast cooling; so steeper temperature descending slope is arranged; the temperature descending slope eases up and gradually near level; promptly put 6 position; this moment, clothes near the outer temperature of dryer, represented that promptly clothing has reached the degree of enough coolings, closed general supply with dead halt (t=t2) and can one be at first controlled by central control unit.In addition, the temperature difference of the temperature of preheated air-timeline K1 line and K3 1-2 line segment on the K3 line can enlarge gradually, keeps equally at the 2-3 line segment, begins again to enlarge at the 3-4 line segment, and keeps equally at the 4-5 line segment, dwindles gradually again at the 5-6 line segment again.Hence one can see that, and the control that is used as temperature difference with the temperature difference of K1 line and K3 line is too complicated really and unrealistic.
United States Patent (USP) 4,485, No. 566 temperature-controlled process is when the temperature difference of K3 line among Fig. 1 and K1 line increases to the predetermined value of setting, it is the time of t=t1, think that clothes has reached the degree of enough doing, can at first close the power supply of heater by central control unit, but compare with Fig. 4, the temperature difference of K3 line and K1 line is a maximum in the time of might not the point of arrival 4, so clothes is not necessarily enough done, and experimental results show that through our real machine, the temperature of dryer outer air and relative humidity, the kind of clothes and weight all can influence the temperature gap of K3 line and K1 line, so the degree that does not have a reliable default value and clothes to do has absolute relation, default value Ding Detai is low, may do inadequately in the low and/or high relative humidity of temperature and/or water holding capacity strong clothes and/or big weight situation, default value Ding Detaigao may cause under low clothes of temperature height and/or low relative humidity and/or water holding capacity and/or light weight situation again and excessively do and waste energy and the time.And if the predetermined value of the setting of the K3 line among Fig. 4 and the temperature difference of K1 line is established too much and during greater than the temperature difference maximum of weather conditions, clothes kind and weight at that time, might not reach the temperature difference of K3 line and K1 line forever, and never heater is cut off the power supply automatically.In addition; the method of wrinkle resistant processing procedure is during for the predetermined value of the plus or minus that is reduced to setting when the temperature difference of K3 line and K1 line; when being t=t2, represent that promptly clothing has reached the degree of enough coolings, closes the general supply dead halt and can at first be controlled by central control unit.Though negative temperature difference can not be arranged; but if when setting temperature difference when K3 line and K1 line and being reduced to the positive predetermined value of setting; represent that promptly clothing has reached the degree of enough coolings, close the general supply dead halt and be still feasible and can at first control by central control unit.But so design, still may because of positive predetermined value when too big the t2 value lack very much wrinkle resistant inadequately effect, positive predetermined value is hour t2 value oversize over-running again motor and wasting energy and the time too.So above two kinds of control methods usually can be unrealistic in practice, especially automatically the method for outage is all the more so to heater, and this is to cause it can't commercial reason.
Hence one can see that, see also Fig. 1, Fig. 5, drying capacity is better though the air themperature among Fig. 1 in the recuperation of heat dryer drying roller is higher, but before the air-out with its partly heat energy to entering the air preheat in the machine, so temperature reduces at the air outlet place, no matter no recuperation of heat dryer therefore as shown in Figure 5 or as the recuperation of heat dryer is arranged among Fig. 1, K3 temperature-time the distributing line of its exhaust all with Fig. 4 in the temperature-time distribution character of K3 line very approaching, just temperature-time distributing line is along with the different translations that have up or down of the kind and the weight of weather conditions and clothes.So the present invention needs only at the characteristic of the K3 temperature-time distributing line of dryer exhaust and does temperature control; can be when clothes be dried fully autostop; also can be applicable to electric thermal desiccator with quadrat method; autostop when the thing that is dried is absolutely dry; or shilling heater outage, treat to make again after wrinkle resistant process is finished the general supply outage.
Therefore; the present invention mainly is by dryer (or electric thermal desiccator; present embodiment is example with the dryer) central control unit that is provided with; and link to temperature (or relative humidity) sensor of dryer exhaust duct air outlet front position; reach when a certain setting " sensing temperature of initiation " (or setting " the sensing relative humidity of initiation "); temperature control unit (or relative humidity control module) begins effect; setting variable quantity convergence zero (precision that sensor can be measured) in blanking time through sensing; that is after not had significant change; represent clothes dry, can control its in good time autostop.Wherein, dryer of the present invention is provided with air intake vent 10; air outlet 20; heater 30; motor 40; fan 50; drying trough roller tube 60; temperature sensor 70 (or relative humidity sensor 80) and central control unit 90 (as Fig. 5); central control unit 90 is provided with temperature control unit 901 (or relative humidity control module 902); mainly by temperature sensor 70 (or relative humidity sensor 80) line of central control unit 90 with the air outlet 20 front positions setting of dryer; when reaching design temperature (or setting relative humidity) through sensing; the temperature control unit 901 of central control unit 90 (or relative humidity control module 902) begins effect; measure temperature (or relative humidity) once in per set time (as each minute); until continuously at least three measure temperature spots and form at least two temperature differences in the precision (usually at 0.1 ℃ to 0.5 ℃) that sensor can be measured the time; or continuously at least three measure precision (usually 0.2% to 1%) that at least two relative humidity differences of relative humidity points composition can measure at sensor when following; clothes has reached the degree of enough doing, can be via the heater outage and the shutdown simultaneously automatically of central control unit 90 control dryers.
Or add the program of wrinkle resistant processing, that is clothing is when having reached enough the degree of doing, and can at first control the power supply of closing heater 30 by central control unit 90, but still the motor 40, the fan 50 that drive drying trough roller tube 60 remain in operation, continue to do wrinkle resistant processing than cold air with the quick cold clothes that promptly is in high temperature in the suction chamber, can utilize simultaneously the surplus temperature of clothes to add hot-air again and reduce its relative humidity, may still do the further drying in place with continuation inadequately to the clothes knuckle, and make the safety effect of dual drying.It is operating as in per set time (as each minute) and determines draught temperature (or relative humidity) once; until continuously at least three measure temperature spots to form at least two temperature differences be in (usually at 0.2 ℃ to 1 ℃) below the precision twice that sensor can be measured the time; or continuously at least 3 to measure at least two relative humidity differences of relative humidity points composition be when (usually 0.4% to 2%) is following below the precision twice that sensor can be measured; clothes has reached enough cold degree, can be via the automatic dead halt of central control unit 90 control dryers (please join Fig. 8: heater outage control and wrinkle resistant process are finished the temperature-time curve figure that control is shut down in outage).
Below be specific embodiments of the invention:
When dryer entry into service dry wet clothes, METHOD FOR CONTINUOUS DETERMINATION temperature (or relative humidity).Temperature when the position of dryer air outlet 20 before has slightly reached the initial control temperature of a certain setting controller through sensing, the initial control temperature of this controller desirable as shown in Figure 4 first section (summary level) constant temperature of drying discharge characteristic K3 line and the median of second section (summary level) constant maximum temperature, for example TaiWan, China can be set at 38 ℃ and (please join Fig. 9: control initial temperature T
sThe definition reference diagram); temperature control unit 901 begins effect; or reached the initial control relative humidity of a certain setting controller after testing when the relative humidity of the position of dryer air outlet 20 before slightly; the median of the desirable drying discharge characteristic of the initial control relative humidity of this controller first section (summary level) constant relative humidity of K3 line and second section (summary level) constant minimum relative humidity; for example TaiWan, China can be set at relative humidity 30%; control module 902 begins effect; per minute is measured temperature (or relative humidity) once; forming three temperature differences at continuous four temperature spots is that precision (for example 0.2 ℃) at institute's employing temperature-sensitive sticker is when following; or when the relative humidity variations of the position of dryer air outlet 20 before slightly; three relative humidity differences forming at continuous four relative humidity points are when the precision (as 0.4%) of employing relative humidity sensor is following; represent that promptly clothing has reached the degree of enough doing; and can at first control the power supply of closing heater 30 by central control unit 90; but the motor 40 and the fan 50 that drive drying trough roller tube 60 remain in operation; colder air is done wrinkle resistant processing with the clothes that quick cooling is in high temperature in the continuation suction chamber; can utilize simultaneously the surplus temperature of clothes to add hot-air again and reduce its relative humidity; it is dry that continuation may still be done place's work inadequately to the clothes knuckle; the effect of dual drying is arranged; three temperature differences forming at continuous four temperature spots until the variations in temperature of the position of dryer air outlet 20 before slightly are when (as 0.4 ℃) is following below the precision twice that sensor can be measured; or when the relative humidity variations of the position of dryer air outlet 20 before slightly in three relative humidity differences of continuous four relative humidity points composition when (as 0.8%) is following below the precision twice that sensor can be measured; represent that promptly clothing has reached the degree of enough coolings, and can close general supply with dead halt by central control unit 90 controls.
More than, be that to form three temperature differences (relative humidity is poor) with continuous four temperature spots (relative humidity point) be example in particular range, in fact, form at least two temperature differences (relative humidity is poor) in particular range with at least three temperature spots (relative humidity point) continuously, can successfully utilize this method to control; So, when measuring temperature, until continuously at least three measure temperature spots and form at least two temperature differences in the precision (usually at 0.1 ℃ to 0.5 ℃) that sensor can be measured the time, can close the power supply of heater 30.Its control method as shown in Figure 8.
So can improve known dryer with the defective of rough estimate time control closing method (time set deficiency even; clothes is just done inadequately; or overlong time causes superheated to cause the damage of clothing and wastes energy and the shortcoming of time), reach the purpose of saving the energy and time and protection clothing.Again if increase to adopt wrinkle resistant processing method, more can increase and prevent clothing fold and take out drying clothes immediately and the advantage that can not scald one's hand.
And aspect control circuit, can be as shown in Figure 6, the circuit of single-chip microprocessor and solid-state relay is used for general circuit because of it then as shown in Figure 7, will not give unnecessary details in this.K3 line by temperature-time of the dryer exhaust system test gained that as shown in Figure 5 no recuperation of heat is utilized; illustrate that heater 30 outages are controlled and wrinkle resistant process is finished the control that outage is shut down; the K3 characteristic curve of the temperature-time of dryer exhaust system test gained has three sections line segments that variations in temperature is little, and to contain steam be saturation stage (can with reference to the 2-3 line segment among the figure 4) to drying tube hot-air in the wet clothes dehumidifying drying that first section little line segment of variations in temperature is lower temperature.The clothes that second section little line segment of variations in temperature is higher temperature is baking stage (can with reference to the 4-5 line segment among the figure 4).Do the heater outage for the clothes of second section of higher temperature of control baking stage, must skip the little phase I of variations in temperature in the wet clothes dehumidifying drying of lower temperature.Can in the middle of two stage temperature value, get a control initial temperature T
s(can be set at 38 ℃ as TaiWan, China) is as the circuit control initial temperature T of single-chip microprocessor and solid-state relay
s(referring to Fig. 9).From T
sBeginning, each minute read delivery temperature, and continuous two temperatures difference is made comparisons; As Fig. 9, second section maximum temperature change measure in the little line segment 4 temperature T 1, T2, T3, T4 continuously; As (T2-T1), (T3-T2), during (T4-T3) all less than the precision Δ TL1 of temperature sensor (Δ TL1 is tentative at present to be 0.2 ℃), represent that promptly clothing has reached the degree of enough doing, should stop heating, then single-chip microprocessor output " 0 " low-potential signal is controlled solid-state relay () and is cut off heater power source, stops heating.
As for the quick outage control aspect of motor and fan during wrinkle resistant the finishing dealing with of cooling of clothes, though heater cuts off the power supply, but the motor 40 and the fan 50 that drive drying trough roller tube 60 remain in operation, when temperature descends as Fig. 9, in the 3rd section line segment that variations in temperature is little, measure 4 temperature T 5 continuously, T6, T7, T8, as (T6-T5), (T7-T6), (T8-T7) all (Δ TL2 is tentative at present to be 0.4 ℃ less than the twice Δ TL2 of the precision of temperature sensor, only need clothing to reach the degree of enough coolings because of doing wrinkle resistant processing, do not need too high accuracy) time, then the single-chip microprocessor is exported " 0 " low-potential signal, the control that control solid-state relay (two) work is cut off the electricity supply stops motor and fan and rotates drying clothes and wrinkle resistant finishing dealing with.
According to the above; as can be known the conception of the present invention's autostop when dryer reaches dried degree to the clothing of dehumidifying can judge clothing accurately oven dry whether; for the user very big convenience is arranged in fact; can not produce peculiar smell because the clothing baking does not do; also not can because of over-drying and the injury clothing material; again if increase to adopt wrinkle resistant processing method, more can increase and prevent clothing fold and take out drying clothes immediately and the advantage that can not scald one's hand.Real in considering hommization and truly feasible invention, its practical convenience with economize the characteristic of maximum of the present invention especially that can save time, moreover reequip the control method test of temperature of the present invention or relative humidity through reality with dryer, also confirmed really for feasible.Believe that the warm welcome that product of the present invention must be subjected to the consumer prefers to use, household appliances manufacturer accepts method of the present invention and with after it commercialization, just can increase the competitiveness of product of its dryer or electrical equipment drier.
In sum, method of the present invention as can be known really can reach the purpose of saving the energy and time and protection clothing, and makes the more perfect function of the product of dryer or electrical equipment drier, and its running more meets social consumption person's demand.
Claims (9)
1; a kind of method of province's energy autostop of electric thermal desiccator; it is characterized in that; described electric thermal desiccator is provided with air intake vent; air outlet; heater; motor; fan; the dry slot cylinder; temperature sensor and central control unit; central control unit is provided with temperature control unit; mainly by the central control unit of electric thermal desiccator and the temperature sensor line that before the air outlet of electric thermal desiccator, is provided with; when reaching the control initial temperature of setting through sensing; the temperature control unit of central control unit begins effect; measure temperature once in per set time; when continuously at least three to measure at least two temperature differences that temperature spots form be in the precision at temperature sensor the time, can control the electric thermal desiccator autostop via central control unit.
2, the method for the province of electric thermal desiccator as claimed in claim 1 energy autostop is characterized in that the precision of temperature sensor is 0.1 ℃ to 0.5 ℃.
3, the method for the province of electric thermal desiccator as claimed in claim 1 energy autostop; it is characterized in that the design temperature that begins to act on of temperature control unit is the median of getting the very little maximum temperature of the very little temperature of first section variations in temperature of dry exhaust characteristic temperature-timeline and second section variations in temperature.
4; a kind of method of province's energy autostop of electric thermal desiccator; it is characterized in that; described electric thermal desiccator is provided with air intake vent; air outlet; heater; motor; fan; the dry slot cylinder; temperature sensor and central control unit; central control unit is provided with temperature control unit; mainly by the central control unit of electric thermal desiccator and the temperature sensor line that before the air outlet of electric thermal desiccator, is provided with; when reaching the control initial temperature of setting through sensing; the temperature control unit of central control unit begins effect; measure temperature once in per set time; when continuously at least three to measure at least two temperature differences that temperature spots form be in the precision at temperature sensor the time; can control via central control unit; only make electric thermal desiccator close the power supply of heater; but the motor of dry slot cylinder and fan are remained in operation; at least two temperature differences that variations in temperature before the electric thermal desiccator air outlet is formed at continuous three temperature spots at least are when the precision twice of temperature sensor is following, close general supply and dead halt by central control unit control again.
5; a kind of method of province's energy autostop of electric thermal desiccator; electric thermal desiccator is provided with air intake vent; air outlet; heater; motor; fan; the dry slot cylinder; relative humidity sensor and central control unit; central control unit is provided with the relative humidity control module; by the central control unit of electric thermal desiccator and the relative humidity sensor line that before the air outlet of electric thermal desiccator, is provided with; when reaching setting relative humidity after testing; the relative humidity control module of central control unit begins effect; measure relative humidity once in per set time; when being in the precision at relative humidity sensor the time in continuous at least three at least two relative humidity differences measuring relative humidity points compositions, can control the electric thermal desiccator autostop via central control unit.
6, the method for the province of electric thermal desiccator as claimed in claim 5 energy autostop is characterized in that the precision of relative humidity sensor is 0.2% to 1%.
7, the method for the province of electric thermal desiccator as claimed in claim 5 energy autostop; it is characterized in that the setting relative humidity that begins to act on of relative humidity control module is the median of getting the very little minimum relative humidity of the very little relative humidity of dry exhaust relative humidity-first section relative humidity variations of time response line and second section relative humidity variations.
8; a kind of method of province's energy autostop of electric thermal desiccator; it is characterized in that; electric thermal desiccator is provided with air intake vent; air outlet; heater; motor; fan; the dry slot cylinder; relative humidity sensor and central control unit; central control unit is provided with the relative humidity control module; by the central control unit of electric thermal desiccator and the relative humidity sensor line that before the air outlet of electric thermal desiccator, is provided with; when reaching setting relative humidity after testing; the relative humidity control module of central control unit begins effect; measure relative humidity once in per set time; when being in the precision at relative humidity sensor the time in continuous at least three at least two relative humidity differences measuring relative humidity points compositions; can control via central control unit; only make electric thermal desiccator close the power supply of heater; but the motor of dry slot cylinder and fan are remained in operation; at least two relative humidity differences that relative humidity variations before the electric thermal desiccator air outlet is formed at continuous three relative humidity points at least are when the precision twice of relative humidity sensor is following, close general supply and dead halt by central control unit control again.
9, as the province of claim 1 or 4 or 5 or 8 described electric thermal desiccators can autostop method, it is characterized in that described electric thermal desiccator is a dryer.
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| CNB2005100053387A CN100523359C (en) | 2005-02-02 | 2005-02-02 | Energy-saving automatic cut-off method for electric-heating dryer |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100053387A CN100523359C (en) | 2005-02-02 | 2005-02-02 | Energy-saving automatic cut-off method for electric-heating dryer |
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| CN100523359C true CN100523359C (en) | 2009-08-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521905A (en) * | 2016-12-30 | 2017-03-22 | 浙江正理生能科技有限公司 | Heat pump type clothes drying wardrobe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101831781B (en) * | 2009-03-10 | 2012-07-25 | 苏州三星电子有限公司 | Automatic drying method of drum washing machine |
| CN103668913B (en) * | 2012-09-20 | 2015-11-18 | 广东美芝精密制造有限公司 | The control method of heat pump clothes dryer |
| CN108691181B (en) * | 2017-04-11 | 2021-11-26 | 上海海尔洗涤电器有限公司 | Method for judging clothes drying and clothes drying equipment |
| CN110359226B (en) * | 2018-04-11 | 2021-12-03 | 佛山海尔滚筒洗衣机有限公司 | Control method for laundry treatment apparatus and laundry treatment apparatus |
| KR101982214B1 (en) * | 2018-07-17 | 2019-05-24 | 정연관 | Industrial dryer |
| CN109236705A (en) * | 2018-11-27 | 2019-01-18 | 英业达科技有限公司 | Fan rotational frequency control method and its device |
| CN112361739A (en) * | 2020-11-13 | 2021-02-12 | 河北经贸大学 | Relative humidity regulation and control method in hot air drying process of agricultural products |
| CN114074016B (en) * | 2021-11-09 | 2022-07-22 | 山东金格瑞机械有限公司 | Drying and crushing method of plant materials and processing system thereof |
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| CN106521905A (en) * | 2016-12-30 | 2017-03-22 | 浙江正理生能科技有限公司 | Heat pump type clothes drying wardrobe |
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