EP3114420B1 - Verfahren zur trocknung von körpern - Google Patents

Verfahren zur trocknung von körpern Download PDF

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Publication number
EP3114420B1
EP3114420B1 EP15707069.9A EP15707069A EP3114420B1 EP 3114420 B1 EP3114420 B1 EP 3114420B1 EP 15707069 A EP15707069 A EP 15707069A EP 3114420 B1 EP3114420 B1 EP 3114420B1
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EP
European Patent Office
Prior art keywords
temperature
infrared
infrared emitters
dried
drying
Prior art date
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Application number
EP15707069.9A
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German (de)
English (en)
French (fr)
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EP3114420A1 (de
Inventor
Bertram Anderer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ires Infrarot Energiesysteme GmbH
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Ires Infrarot Energiesysteme GmbH
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Priority to PL15707069T priority Critical patent/PL3114420T3/pl
Publication of EP3114420A1 publication Critical patent/EP3114420A1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/02—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in buildings

Definitions

  • the present invention relates to a method for drying bodies by means of infrared radiators, wherein at least a first infrared radiator is aligned with a body to be dried and the temperature of the body to be dried is detected at regular or irregular intervals by means of a temperature sensor, wherein the first infrared radiator in a Interval drying phase is switched on and off, that moves the detected temperature of the body to be dried between a lower temperature limit and an upper temperature limit.
  • Infrared radiators are now known as a solution to this problem, which can be placed in front of the wall in the form of infrared panels, for example, in order to dry them.
  • infrared panels act relatively locally, more or less only on the part of the wall to which they are aligned. It would therefore be necessary to set up a plurality of infrared panels over a wall to be dried or in front of a body to be dried in order to allow continuous drying.
  • the use of the infrared panels has significant advantages, since the use of the infrared panels, a warming of the wall takes place and thereby the moisture is much faster due to the capillary action of the wall or the body is conveyed out.
  • the heating up to 80 ° C and beyond complicates the formation of mold after these bacteria are killed in these temperature ranges.
  • infrared panels are perceived as relatively expensive and in turn have the disadvantage that they have a relatively high power consumption. This pays off readily over time because the drying time and thus the service life of the infrared panels are so much shorter when fully populated with infrared panels compared to using an air dryer that the resulting power costs of the infrared panels are more favorable. Due to the shorter drying time, there is also a significantly reduced time in which the rooms are not available for use, so that the use of infrared panels is consistently positive.
  • the present invention is based on the object of specifying a method for drying bodies using infrared radiators, which despite a normal domestic installation enables a surface drying of bodies, in particular of building walls, with a plurality of infrared radiators.
  • a dry wall section or generally a dry wall layer of the body to be dried
  • the water penetrates from the wall and is transported away with the air, while the water in the resting phases from the much wetter wall sections trailing.
  • the greater humidity in the wall core outweighs the higher temperature at the surface, so that the water pulls outwards.
  • inversion point is reached in which the actual drying no longer takes place in the heating phase, but rather in the rest phase.
  • the inversion point is achieved, in particular, when the degree of humidity of the wall surface in relation to the room humidity and the specific moisture transfer between the infrared radiator and the wall has reached a certain ratio.
  • the achievement of this time is determined by a comparison with a reference curve. From this point on, there is not so much water left in the wall core that it can run against the thermal barrier on the surface, so that the water retreats towards the colder wall areas, despite the residual moisture present there. Only in the resting phase, with decreasing temperature on the wall surface, again draws water to the outside.
  • the simultaneous drying operation of multiple infrared radiators can be used in an alternating operation, which is useful for various reasons.
  • the alternating operation of the infrared radiators avoids too high a simultaneous power consumption of the infrared radiators, so that the risk of overloading the available power network is reduced.
  • the infrared radiators are often provided with a ceramic layer, which improves the infrared radiation.
  • infrared radiators are aligned at the same body to be dried at different locations, only one infrared radiator or a group of infrared radiators will heat the body or the wall at a time and then another from another infrared radiator or another group to be detached from infrared radiators.
  • This entire process is iterated as needed until a complete drying of the body or the wall has taken place.
  • This can be quantified, for example, by detecting predetermined temperatures of the body to be dried or by detecting the room humidity in the area of action of the infrared radiators, so that a timely shutdown of the system is ensured. Again, this makes sense for energetic reasons.
  • infrared radiators can in this case communicate with a control unit which coordinates the switching on and off of the individual infrared radiators.
  • various approaches are conceivable, such as the specification of a fixed sequence, or the connection of that infrared radiator, in the area of which the largest value of the room humidity can be determined.
  • the shutdown of the individual infrared radiator or infrared radiator groups takes place after falling below a limit value of the room humidity or even when reaching a predetermined temperature in the region of the body to be dried.
  • the individual infrared radiators can either be connected directly to the control unit, but without further ado, a bus system can also be created between the infrared radiators, which then terminally or equally includes the control unit as well.
  • a bus system can also be created between the infrared radiators, which then terminally or equally includes the control unit as well.
  • the structure of the system is significantly simplified, since it is not necessary to realize a cable connection with the control unit for each individual infrared radiator.
  • a power supply if necessary, on other wires, can be realized.
  • control unit will check which power is available to it and, if necessary, switch on additional infrared radiators within the limits of its given or preset options in order to shorten the entire drying process as far as possible.
  • contactless temperature sensors can be used, which are arranged in the region of the infrared radiator and are aligned with the body to be dried.
  • the temperature sensor measures the energy radiated back from the object and thus the temperature on the body to be dried, eg on the wall to be dried.
  • the infrared radiator itself usually radiates with a surface temperature of about 110 ° C, the temperature sensor receives the reflected back from the wall temperature, a set limit, for example, could be at 75 to 80 ° C. This will ensure that that the wall to be dried or the body to be dried does not become warmer than the pre-set temperature.
  • a control circuit in which a predetermined temperature of the body to be dried is input as the desired value, the temperature in the area of action of the infrared radiator is detected by the temperature sensor and fed back to the control unit as the measured temperature. Based on the temperature to be determined, which is detected by the temperature sensor, a control signal is generated by means of a reference value comparison by the control unit, which transmits the control unit to a processor unit for setting the power consumption of the infrared radiator.
  • the processor unit does not set the predetermined power directly, but rather only switch back and forth between a low and a high level.
  • the resulting rectangular shape of the resulting pulse signal is applied in terms of its width so that over a period of observation as an average value, the desired performance sets.
  • the exploitation of the ideal operating point applies, in which the power absorbed by the infrared radiator can be optimally converted into heat.
  • control unit By a communication between the control unit and the processor unit is regularly taken to ensure that switching on and off the individual infrared radiators is effected exclusively to the zero crossing of the AC voltage of the power supply to avoid the occurrence of load peaks as much as possible. As a result, there are no steep flanks and it is avoided that the load peaks lead to the triggering of a possibly responsive in this area fuse.
  • the target size of the predetermined temperature is set by means of an actuating means from the outside.
  • an actuating means from the outside.
  • a stepless as well as a graduated specification using, for example, a rotary switch is made possible, so that in a simple way, the application of the particular infrared radiator is specified before it is put into operation.
  • a central programming of the actuating means for example via the above-mentioned bus connection from the control unit from possible.
  • control unit with additional measured values via further sensors which can influence the control behavior.
  • these may be room humidity sensors, as well as temperature sensors introduced into the body to be dried. This is not an exhaustive list, other sensors and timers may also be used.
  • FIG. 1 shows a control loop in which initially a predetermined temperature 1 is set from the outside. This predetermined temperature 1 is first provided to a control unit 2, which then generates an actuating signal and forwards it to a processor unit 3. Due to the setting of the processor unit 3, an actual temperature 4 will set on a body to be dried, which in turn can be measured by means of temperature sensors. The measured temperature 5 is fed back into the control loop, and at the beginning of the control unit 2 a setpoint comparison is made. If applicable, interference quantities 6 act on the controlled system formed by the processor unit 3 and the infrared radiators 8, 9 itself.
  • FIG. 2 shows a control unit 7, which is connected via a bus system with a plurality of groups of infrared radiators 8, 9.
  • a first group of infrared radiators 8 in operation while two other groups of infrared radiators 9 are out of operation.
  • the control unit 7 shown here to control entire groups of infrared radiators 8, 9.
  • the infrared radiator 8, 9 are connected to each other in the present example in groups of three, the control unit 7 each three interconnected infrared radiators 8, 9 switches simultaneously. This avoids that in each case more than three infrared radiators 8 are simultaneously on the network, so that an overload of the network is avoided.
  • FIG. 3 shows an alternative control by the control unit 7, in which each individual infrared radiators 8 of each group are in operation, while individual infrared radiators 9 of each group are out of service.
  • control unit 7 in which each individual infrared radiators 8 of each group are in operation, while individual infrared radiators 9 of each group are out of service.
  • only two groups are formed, which in turn can be switched alternatively to each other.
  • a control takes place at the level of the individual infrared radiators 8, 9, wherein by switching on and off the individual infrared radiators 8, 9 an average power consumption is realized below the maximum power consumption.
  • a change is made between a high level and a low level, in one possible embodiment of the high level the maximum power consumption and the low level representing a complete switch-off.
  • the power is then influenced by turning on and off for different periods of time. This is done by a processor unit 3, which controls the pulse widths.
  • a plurality of infrared radiators 8 can be synchronized via the bus system such that only one infrared radiator 8 is heated at a time, while the others are in the decay phase.
  • the evaporation cold produced during drying ensures that the wall does not reach a given temperature for some time.
  • the evaporation cold limits the heating.
  • the infrared radiator 8 radiates at maximum power to achieve rapid drying.
  • the drier wall begins to radiate more energy, which can be detected by the temperature sensor.
  • the processor unit 3 will receive a lower control signal and then increase the pulse width of the low signal and thus lower the average energy which is radiated onto the body to be dried.
  • the power of the infrared radiator 8 is brought down completely to zero due to a sensor signal of the temperature sensor and signaled to the control unit 7 on the basis of a signal that this can turn on the next group of infrared radiators 9.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
EP15707069.9A 2014-03-04 2015-02-20 Verfahren zur trocknung von körpern Active EP3114420B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15707069T PL3114420T3 (pl) 2014-03-04 2015-02-20 Sposób suszenia korpusów

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014102836 2014-03-04
PCT/EP2015/053582 WO2015132083A1 (de) 2014-03-04 2015-02-20 Verfahren zur trocknung von körpern

Publications (2)

Publication Number Publication Date
EP3114420A1 EP3114420A1 (de) 2017-01-11
EP3114420B1 true EP3114420B1 (de) 2018-10-31

Family

ID=52596461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15707069.9A Active EP3114420B1 (de) 2014-03-04 2015-02-20 Verfahren zur trocknung von körpern

Country Status (3)

Country Link
EP (1) EP3114420B1 (pl)
PL (1) PL3114420T3 (pl)
WO (1) WO2015132083A1 (pl)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4336857A1 (de) * 1993-10-28 1995-05-04 Bayerische Motoren Werke Ag Verfahren zum Trocknen von Automobillacken
FI105950B (fi) 1997-04-09 2000-10-31 Antero Klemetti Menetelmä ja laite kosteuden ja/tai homeen poistamiseksi rakenteesta
DE10250798A1 (de) * 2001-12-20 2004-05-19 Ibt Infrabio Tech Gmbh Infrarotstrahler zur thermischen Behandlung von Gütern, nämlich Baukörpern, Bauelementen und Baustoffen
DE102010023679B4 (de) * 2009-08-08 2014-05-22 IWT Infrarot-Wärmetechnik GmbH Strahlungstrockner und Verfahren zum Betreiben eines Strahlungstrockners

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3114420A1 (de) 2017-01-11
WO2015132083A1 (de) 2015-09-11
PL3114420T3 (pl) 2019-07-31

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