EP3784830A1 - Drier and method for operating a drier - Google Patents
Drier and method for operating a drierInfo
- Publication number
- EP3784830A1 EP3784830A1 EP19729172.7A EP19729172A EP3784830A1 EP 3784830 A1 EP3784830 A1 EP 3784830A1 EP 19729172 A EP19729172 A EP 19729172A EP 3784830 A1 EP3784830 A1 EP 3784830A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- receptacle
- drying
- module
- recirculated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000001035 drying Methods 0.000 claims abstract description 71
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims description 45
- 238000009423 ventilation Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 4
- 238000011068 loading method Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 239000003570 air Substances 0.000 description 154
- 239000004753 textile Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/26—Heating arrangements, e.g. gas heating equipment
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F95/00—Laundry systems or arrangements of apparatus or machines; Mobile laundries
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/06—Type or material
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/12—Temperature
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/24—Spin speed; Drum movements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/28—Air properties
- D06F2103/32—Temperature
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/28—Air properties
- D06F2103/34—Humidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/28—Air properties
- D06F2103/36—Flow or velocity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/16—Air properties
- D06F2105/24—Flow or velocity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/28—Electric heating
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/30—Blowers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/32—Air flow control means
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
- D06F2105/48—Drum speed
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
- D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
Definitions
- the invention relates to a dryer with a receptacle for Trocknungsgut, an air guide for guiding circulating air and / or fresh air to the recording, a Fleiz worn and at least one sensor for determining relative humidity and / or temperature, wherein the air guide comprises at least one adjustment, so in that the recirculated air portion guided to the receptacle can be changed via the adjusting element.
- the invention further relates to a method for controlling or regulating a dryer according to the invention.
- Dryers of the type mentioned are known in practice and exist in different embodiments. Reference will be made, by way of example only, to the document WO 2016/184462 A1.
- the residual water from the textiles is removed under the action of heat.
- a tumble dryer is used in the drum dryer (tumbler) as a preparation for the mangling of flat linen or for the finishing of molded parts.
- Certain parts e.g., toweling
- Pre-drying and solid drying differ by the water content (residual moisture) of the laundry parts at the end of drying.
- the final textile moisture content is between 35% and 50% (predrying) or 5% and 0% (full drying).
- a major problem in the removal of residual water under heat with the known dryers is the extremely unfavorable efficiency.
- the energy requirement values are up to 1.5 kWh / kg of dried textile.
- This, compared to the theoretically required for evaporation of water high heat energy demand is due to the fact that the porous material to be dried is heated by hot air, which is guided by blowers to the textiles and at the same time takes over the removal of the evaporated water. Due to the lower installation costs, the easier regulation of the heat energy supply and the lower energy input, gas-fired dryers have prevailed over steam-heated dryers. Electric heating is only used in small commercial machines or for household appliances
- the damages caused by the drying are, in particular, textile damage such as changes in the textile dimensions, a reduction in the whiteness and the color as well as chemical damage to the fiber substrate.
- These textile damage occur in particular by "over-drying" of the laundry items (removal of the water contained in textiles at normal humidity, in cotton by 10%) at elevated temperature and drying time. Prolonged drying time - even at low temperatures - favors fiber abrasion due to intensive "drying mechanics".
- the present invention is therefore based on the object, a dryer and a method for operating a dryer in such a way and further, that with structurally simple means a gentle drying at the lowest possible energy consumption is possible.
- the above object is achieved by the features of claim 1.
- the dryer in question with a receptacle for Trocknungsgut, an air guide for guiding circulating air and / or fresh air to the recording, a heater and at least one sensor for determining relative humidity and / or temperature, wherein the air guide comprises at least one adjustment in that the recirculated air fraction guided to the receptacle can be changed via the adjusting element, thereby in that a control or regulating device is arranged, so that the circulated air portion guided to the receptacle and / or the heating power of the heating device can be controlled or regulated during the drying process.
- the drying process can be considerably optimized with regard to energy efficiency and textile preservation if the circulated air portion and / or the heating power can be regulated or controlled during operation.
- the recirculated air content and / or the heating power of a control or regulating device taking into account the different drying phases be changeable, whereby it is achieved that the total drying at extremely high degree of saturation of the process air and the lowest possible air temperature is feasible.
- Due to the constructive design according to the invention in addition to a high utilization of heat, it is achieved that the drying process is extremely gentle on the textile, since overheating of the material to be dried is avoided.
- the proportion of recirculated air within - for example in a hood - and / or outside - for example, in pipes - the device can be performed.
- fresh air in the context of this invention refers to ambient air, which is the dryer, such as the recording or the burner supplied.
- process air refers to the air contained in the receptacle during the drying process.
- exhaust air is understood to mean the air discharged from the intake. If the exhaust air is returned to the intake and thus forms part of the process air, it is referred to as "circulating air”.
- the "drying material” may be textiles or goods made of other materials, such as rubber mats or mats made of polyamide pile.
- the "recording" may be formed in a single dryer in particular as a drum.
- the recording of the entire device may be formed for example by the respective drums of the modules, ie also be present in a modular manner.
- the adjusting element may be a ventilation flap and / or a circulating air blower.
- the ventilation flap can be arranged in such an air duct, that in the open position of the ventilation flap exhaust air is returned to the recording and thus serves as circulating air.
- the ventilation flap and possibly the air duct is designed such that in a completely open ventilation flap position, a recirculated air proportion of 100% and in a closed ventilation flap position a recirculation rate of 0% can be realized.
- a circulating air blower can be arranged in the air guide in order to promote exhaust air intake as circulating air.
- the ventilation flap position and / or the circulating air blower power is at least substantially continuously adjustable.
- a particularly energy-efficient control or regulation of the drying process is made possible.
- the ventilation flap by means of a servomotor or a cylinder-piston device (eg. Pneumatic cylinder) is operable.
- the senor may be used for determining the relative exhaust air humidity of the exhaust air discharged from the input.
- This sensor may include a filter element to protect the sensor from lint.
- a filter element for example, a fabric filter or steel sintered element, in particular with a pore size of 5 pm serve.
- the term "relative exhaust air humidity” is to be understood in the broadest sense, namely, the measurement of the relative air humidity can also take place in the interior of the receptacle and thus relate to the process air.
- a sensor for determining the surface temperature of the material to be dried can be arranged. For example, this may be an infrared sensor or any other temperature sensor.
- a combined temperature and humidity sensor is provided. It is also conceivable that a sensor for determining the input air temperature and / or the outlet air temperature is arranged.
- the inlet air is the air which is introduced into the receptacle, whereas the outlet air is the air which is discharged from the receptacle. It can thus be arranged any combination of the above sensors.
- the number and mode of operation of the sensors of the individual modules may differ from one another, so that the sensors are provided corresponding to the defined task of the modules.
- the inlet air temperature and / or the outlet air temperature can be taken into account in the control or regulation of the recirculated-air proportion and / or the heating power.
- the control of the adjusting element in particular the ventilation flap position and / or the circulating air blower, with the relative exhaust air moisture and / or with the surface temperature of the material to be dried as a measured variable and the recirculated air as a control variable.
- the control of the heating device takes place with the relative exhaust air humidity and / or the surface temperature of the material to be dried as the measured variable and the heating power as the control variable.
- the heat output of the burner is adaptable to the essential parameters that change during the drying process.
- the receptacle can have a plurality of modules arranged one after the other and / or next to one another, which are configured in a suitable manner for heating, drying or cooling the material to be dried, in particular each module can have its own heating device.
- the recording can have two or more modules arranged one after the other and / or next to one another.
- the dryer can have at least one transport device assigned to a module for the further transport of the material to be dried from this module to another module.
- a transport device assigns a secure transport or a secure transfer of the material to be dried in the drying process effected by the modules.
- the air duct may be configured such that the circulating air supplied to a module is exhaust air of this module and / or exhaust air of at least one other module.
- it can be the exhaust air of a module arranged in front of it in the direction of transport of the material to be dried, preferably the module arranged directly in front of it or several modules arranged in front of it. Due to the at least partial use of exhaust air as circulating air, the heat contained in the exhaust air can be used in one or more other modules.
- the exhaust air can also be used as combustion air of the heating device, provided that the heating device is operated by means of a combustion process. In addition to such a mode of operation of the heating device, it is also possible to heat the air by means of steam or electrical energy-without a combustion process. In this case, an exhaust air of a module for the heater is not needed.
- heat from an exhaust air of a module or several modules can be arranged at least partially on an air intake and / or recirculation air, in particular in front of it, preferably directly in front of it arranged, module or more, in particular arranged in front of modules be transferable.
- Such a transfer process can be carried out by means of one or more heat exchangers, preferably air / air / heat exchangers. exchanger, done.
- This type of use of waste heat from an exhaust air differs due to a transmission means used - the heat exchanger - from a direct transfer of heat, as for example in a case when exhaust air of a module at least partially forms a supply air of another or several other modules.
- a heat exchanger can for example be integrated in a module or be directly associated with a module, for example to enable recirculation mode operation of the module.
- a heat exchanger or a plurality of heat exchangers may be provided, which are arranged in an air duct or integrated into an air duct, for example, if necessary, to preheat a supply air for a module by means of an exhaust air of a module.
- a module for controlling the moisture content of the material to be dried can be arranged in front of a module for cooling the material to be dried.
- a control module can form the end of an arrangement of modules for heating and for drying, in order to check the moisture content before the drying material cools and, if necessary, to additionally perform a post-drying in the control module.
- a supply air of a module for controlling the moisture content of the material to be dried may at least partially be air, which is heated by means of a heat exchanger, preferably an air / air heat exchanger, the thermal energy from the exhaust air of a module for Heating the Trocknungsguts and / or from the exhaust air of another module or module for controlling the moisture content of the drying material itself refers.
- efficient use of energy can take place by supplying preheated supply air.
- the supply air to this control module is formed exclusively by preheated to the type described air.
- One or more usually arranged as a completion of the arrangement of different modules module for cooling the drying material supply air or fresh air can be supplied from the installation room in which this module or modules are located or from outside the building.
- the air duct which may be formed, for example, at least partially corresponding pipes, additional fans or fans. This makes it possible to support the air flow, so that a reliable operation of the dryer is ensured, especially in air ducts over long distances.
- a transport device can be arranged between each two modules.
- the transport device may preferably have a conveyor belt or a chute or a slide chute.
- a suitable height offset between the modules is useful so that the material to be dried passes from one module to the next module due to gravity. Possibly.
- a compressed air support can be provided which ensures a safe onward transport of the material to be dried.
- the transport device may be formed as an internal mechanism of a module or integrated into a module. Such a transport device or mechanism can move the transported goods between modules by means of suitable gripping and / or guiding elements. When selecting a suitable transport device, the required amount of material to be transported can be taken into account.
- a drying material supply device can be arranged before the receptacle, which preferably has a weighing device for the material to be dried. This ensures that the dryer and, in concrete terms, the receptacle is loaded with a suitable amount of material to be dried. An overload of the dryer can be excluded thereby.
- the control or regulating device as further parameters, the drying material (type of material to be dried), the heating temperature, the residual moisture content, the drying initial moisture, the loading rate, the filling ratio, the process air state variables, the fan power (a circulating air blower and / or a heater blower), the drum movement and / or the burner temperature taken into account.
- the user can specify that the material to be dried is rubber mats or mats made of polyamide pile of a certain loading quantity.
- Corresponding parameters can for example be input via an input device and taken into account by the control or regulation device.
- the user may select a particular program for a dry good to perform the drying process.
- the adjusting element or the adjusting elements can be regulated as a function of the pressure prevailing in the air guide.
- one or more air pressure sensors can be arranged.
- a method for operating a dryer in particular according to one of claims 1 to 11, with a receptacle for Trocknungsgut, an air guide for guiding circulating air and / or fresh air to the recording, a heater and at least one sensor for determining relative humidity and or temperature, wherein the air guide comprises at least one adjusting element, so that the guided to the intake air recirculation portion is changed via the adjusting element, characterized in that a guided to the intake air recirculation and / or the heating power of the heater during the drying process via a control or regulating device is controlled or regulated.
- a high proportion of recirculated air in particular between 90% and 100% recirculated air and a small proportion of fresh air, in particular between 0% and 10% fresh air, are conducted to the receptacle.
- the recirculated air portion during a drying phase in dependence on the measured relative exhaust air moisture is reduced and / or the heating power of the heater is reduced.
- a low proportion of recirculated air in particular from 0% to 10% and a high proportion of fresh air, in particular from 90% to 100%, are conducted to the receptacle. If the receptacle has several modules, it is possible that one or more modules only perform the heating phase or the drying phase or the cooling phase of the drying process.
- the duration of the drying phase and / or the reduction of the recirculated air portion during the drying phase is adjusted taking into account at least one external parameter.
- the external parameters may be the type of material to be dried, the heating temperature, the drying residue moisture, the initial charge moisture content, the charge quantity, the filling ratio, process air state variables, the blower output (a circulating air blower and / or a fan heater), the drum movement and / or the burner temperature.
- Fig. 2 shows a schematic, sectional view of a first
- Fig. 3 shows a schematic, perspective view of a second
- FIG. 4 shows in a schematic, lateral representation of the exemplary embodiment according to FIG. 3,
- Fig. 5 shows in a schematic, side and partially cut
- FIG. 6 shows a schematic plan view of the exemplary embodiment according to FIG. 3.
- Fig. 1 shows the typical temporal temperature profile in the drying material for the duration of drying, wherein the fabric temperature is plotted as a function of the drying time.
- the three phases 1, 2, 3 of the drying process In the first phase 1, the temperature rises rapidly to the value of the evaporation temperature (cooling limit temperature) in order to keep it constant during the course of the second phase 2 as long as the moisture is evaporated from the surface of the textile.
- the third phase 3 In the third phase 3, the residual moisture from the capillaries of the textiles is evaporated, which leads to a sharp increase in the temperature up to the hot air level.
- Fig. 2 shows a first embodiment of a dryer according to the invention.
- the dryer is designed as a single dryer and has a receptacle 4 for the drying material, not shown.
- the receptacle 4 may be formed as a drum.
- the receptacle 4, fresh air 5 can be supplied from outside the device, which is guided transversely through the receptacle 4 and withdraws there as process air 6 the drying material moisture.
- the exhaust air 7 discharged from the receptacle passes through a lint filter 8.
- a circulation fan 9 and a moisture sensor 10 are arranged downstream of the lint filter 8. By this arrangement it is avoided that the moisture sensor 10 is full of lint. However, it is also possible to arrange the moisture sensor 10 in the flow direction before the lint filter 8.
- a ventilation flap 11 is shown in FIG. If the ventilation flap 11 is closed, the exhaust air 7 is led out of the dryer. In the case of complete or partial opening of the ventilation flap 11, the exhaust air 7 can be supplied in whole or in part as circulating air 12 of the receptacle 4.
- the position of the venting flap 11 and / or the performance of the circulating air blower 9 in dependence on the measured with the humidity sensor 10 humidity of the exhaust air 7 during operation be adjusted.
- a temperature sensor 13 is arranged, which serves to determine the surface temperature of the material to be dried.
- a sensor for determining the input air temperature and / or a sensor for determining the output air temperature can be provided.
- FIGS. 3 to 6 show, in different schematic representations, a further exemplary embodiment of a device according to the invention which is suitable for carrying out a method according to the invention.
- the receptacle 4 is formed by a plurality of successively arranged modules 14, 14 ', 14 ", for example, for heating, drying or cooling of the material to be dried.
- the individual modules 14, 14 ', 14 " can be designed according to the embodiment shown in Fig. 2, so that reference is made to the relevant embodiments.
- the receptacle 4 of the entire device can be formed by the individual receptacles or drums of the modules 14, 14 ', 14 ".
- each module has a circulating air guide 16, via which the intake 4, that is, each module 14, 14 ', 14 ", can be supplied with circulating air, namely by regulating or controlling the adjusting elements (not illustrated).
- the exhaust air of the respective module 14, 14 ', 14 " can be removed via an exhaust air duct 21.
- a heat exchanger 17 is arranged, via which the heat from the exhaust air can be transmitted to the supply air.
- the first module 14 has a Walkerlessness unit 18, via which the heater 19 can be supplied with fresh air, which can be preheated via the heat exchanger 17. It is conceivable that all modules 14, 14 ', 14 "have a corresponding Banklessness arrangement 18.
- a Trocknungsgut feed is arranged, via which the module 14 is loaded with the Trock Vietnamese cells.
- a transport device 20 is arranged for further transport of the material to be dried.
- the drying material can be heated, for example in the first module 14, ie the heating phase takes place in this module 14.
- the second module 14 ' the actual drying of the material to be dried can take place, ie the drying phase takes place in this module 14'.
- the last module 14 " for example, the cooling of the material to be dried can take place, ie the cooling phase takes place.
- the the individual modules 14, 14 'and 14 "supplied recirculated air can be done during the drying process in dependence on the measured humidity and / or surface temperature of the material to be dried.
- the heating power of the heating devices of the modules 14, 14 'and 14 " can be adapted as a function of these measured values.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Drying Of Solid Materials (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102018206629.9A DE102018206629A1 (en) | 2018-04-27 | 2018-04-27 | Dryer and method for operating a dryer |
PCT/DE2019/200033 WO2019206383A1 (en) | 2018-04-27 | 2019-04-25 | Drier and method for operating a drier |
Publications (2)
Publication Number | Publication Date |
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EP3784830A1 true EP3784830A1 (en) | 2021-03-03 |
EP3784830B1 EP3784830B1 (en) | 2023-04-05 |
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EP19729172.7A Active EP3784830B1 (en) | 2018-04-27 | 2019-04-25 | Drier and method for operating a drier |
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US (1) | US11976409B2 (en) |
EP (1) | EP3784830B1 (en) |
DE (1) | DE102018206629A1 (en) |
DK (1) | DK3784830T3 (en) |
ES (1) | ES2949791T3 (en) |
FI (1) | FI3784830T3 (en) |
WO (1) | WO2019206383A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210230792A1 (en) * | 2018-04-27 | 2021-07-29 | Lavatec Laundry Technology Gmbh | Dryer and method for operating a dryer |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20220031822A (en) * | 2020-09-04 | 2022-03-14 | 엘지전자 주식회사 | Laundry Treatment Apparatus |
US12000081B2 (en) * | 2021-03-18 | 2024-06-04 | Haier Us Appliance Solutions, Inc. | Travel cycle for a condenser or heat pump dryer appliance |
CN115854694B (en) * | 2022-11-30 | 2023-06-06 | 乳山市东方硅胶有限公司 | Silica gel drying agent production, processing and drying equipment and drying method |
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US2399555A (en) * | 1943-04-24 | 1946-04-30 | Us Hoffman Machinery Corp | Balanced suction tumbler |
US3768173A (en) * | 1972-07-17 | 1973-10-30 | Oxy Metal Finishing Corp | Apparatus for drying workpieces in bulk |
IT1250380B (en) | 1991-03-12 | 1995-04-07 | Zanussi Elettrodomestici | PERFECTED TYPE DRYER MACHINE |
US5713138A (en) * | 1996-08-23 | 1998-02-03 | Research, Incorporated | Coating dryer system |
US6088932A (en) * | 1997-12-30 | 2000-07-18 | Amana Company, L.P. | Efficiency clothes dryer |
DE102006029960A1 (en) * | 2006-06-29 | 2008-01-03 | BSH Bosch und Siemens Hausgeräte GmbH | Dryer with reduced noise, suitable blower and impeller and method for producing the impeller |
AT504578B1 (en) * | 2006-11-21 | 2009-11-15 | Muehlboeck Kurt | METHOD FOR DRYING WOOD MATCHED IN STACKS |
US8627581B2 (en) * | 2007-08-23 | 2014-01-14 | Michael E. Brown | Heat delivery system for a fabric care appliance |
KR100925738B1 (en) * | 2007-09-04 | 2009-11-11 | 엘지전자 주식회사 | Temperature and humidity controlling apparatus of dryer |
KR20110132151A (en) * | 2010-06-01 | 2011-12-07 | 삼성전자주식회사 | Dryer and method of detecting value of dryness |
KR101337699B1 (en) * | 2010-08-11 | 2013-12-06 | 위니아만도 주식회사 | Dryer and Method of controlling for Dryer |
EP3019656B1 (en) * | 2013-07-09 | 2018-02-28 | Electrolux Appliances Aktiebolag | Appliance for drying laundry with enhanced operation flexibility |
KR20150081602A (en) * | 2014-01-06 | 2015-07-15 | 삼성전자주식회사 | Washing machine with drying apparatus and method to control thereof |
KR101613965B1 (en) * | 2014-12-08 | 2016-04-20 | 엘지전자 주식회사 | Control method for exhaust-type dryer |
DE102015209370B3 (en) * | 2015-05-21 | 2016-09-08 | Lavatec Laundry Technology Gmbh | dryer |
DE102016101725A1 (en) * | 2016-02-01 | 2017-08-03 | Stela Laxhuber Gmbh | Continuous dryer with at least two sections |
US10494756B2 (en) * | 2017-11-16 | 2019-12-03 | Haier Us Appliance Solutions, Inc. | Dryer appliances including an air circulation duct |
DE102018206629A1 (en) * | 2018-04-27 | 2019-10-31 | Lavatec Laundry Technology Gmbh | Dryer and method for operating a dryer |
-
2018
- 2018-04-27 DE DE102018206629.9A patent/DE102018206629A1/en active Pending
-
2019
- 2019-04-25 FI FIEP19729172.7T patent/FI3784830T3/en active
- 2019-04-25 US US17/050,675 patent/US11976409B2/en active Active
- 2019-04-25 DK DK19729172.7T patent/DK3784830T3/en active
- 2019-04-25 WO PCT/DE2019/200033 patent/WO2019206383A1/en active Application Filing
- 2019-04-25 EP EP19729172.7A patent/EP3784830B1/en active Active
- 2019-04-25 ES ES19729172T patent/ES2949791T3/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210230792A1 (en) * | 2018-04-27 | 2021-07-29 | Lavatec Laundry Technology Gmbh | Dryer and method for operating a dryer |
US11976409B2 (en) * | 2018-04-27 | 2024-05-07 | Lavatec Laundry Technology Gmbh | Dryer and method for operating a dryer |
Also Published As
Publication number | Publication date |
---|---|
WO2019206383A1 (en) | 2019-10-31 |
DE102018206629A1 (en) | 2019-10-31 |
EP3784830B1 (en) | 2023-04-05 |
ES2949791T3 (en) | 2023-10-03 |
DK3784830T3 (en) | 2023-07-10 |
FI3784830T3 (en) | 2023-07-11 |
US20210230792A1 (en) | 2021-07-29 |
US11976409B2 (en) | 2024-05-07 |
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