US3811202A - Dryer for textiles - Google Patents

Dryer for textiles Download PDF

Info

Publication number
US3811202A
US3811202A US00349297A US34929773A US3811202A US 3811202 A US3811202 A US 3811202A US 00349297 A US00349297 A US 00349297A US 34929773 A US34929773 A US 34929773A US 3811202 A US3811202 A US 3811202A
Authority
US
United States
Prior art keywords
drum
rib
dryer
textiles
slide plates
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.)
Expired - Lifetime
Application number
US00349297A
Other languages
English (en)
Inventor
H Arendt
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.)
ARENDT H MASCHINENBAU DT
ARENDT HANS F MASCHBAU
Original Assignee
ARENDT HANS F MASCHBAU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19702035825 external-priority patent/DE2035825C3/de
Application filed by ARENDT HANS F MASCHBAU filed Critical ARENDT HANS F MASCHBAU
Application granted granted Critical
Publication of US3811202A publication Critical patent/US3811202A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 

Definitions

  • the present-invention relates to a dryer for textiles
  • the dryer has ribs on the inside wall of a cylindrical drum for tumbling and conveying axially the textiles being dried. Hot air flows through perforations in the drum during the drying and removes water from the textiles being dried.
  • FIG. 1 One such known drum is shown in FIG. 1, the manner of operation of which will be explained here', so as to assure an understanding of the present invention.
  • These ribs which are slender in known machines, i.e., have a small angle towards both sides with a height 3; operate in accordance with a scooping principle. In order for satisfactory scooping to be obtained it is. important that ribs 2 are slender.
  • the drying direction of rotation (arrow 4) of drum 1 is fixed. Speed of rotation of drum 1 is adjusted in such a manner that the textiles being dried are in all cases lifted by drum 1 and are dropped down along a curve 5 shown in FIG. 1.
  • the point of separation of a large part of the textiles to be dried which lie further toward the center of the drum is, however, so early that it drops along curve 6. This condition occurs because the centrifugal component, to which the textiles which lie further inside the drum, are subjected, is too small so that rib 2 cannot exert a pushing action thereon.
  • the disadvantage of the foregoing is that a portion of the textiles to be dried whichdrops along curve 6 has a relatively short path of fall and is accessible to drying air in a loosened condition for only a relatively short period of time.
  • the textiles to be dried which lie against the wall of drum 1 have such a compact structure that the drying air practically cannot, and does not, act thereon at all.
  • the danger of their being rolled up and compacted is present due to their contacting the drum wall. Larger pieces of the textiles, as soon as they have once been rolled together, generally remain in this compacted condition and cannot be dried to the desired extent.
  • the textiles to be dried are advanced axially in the drum by means of inclination of the drum or by a directed stream of air. This takes place either'after completion of drying in order to empty the drum or for further conveyance within a long drum during the drying process. Dryers of this type are known under the trademark ORTEX.
  • dryers in which the ribs extend obliquely in the drum and are arranged therein in one or more helical threads. Dryers also have been constructed with the sense of rotation of the drum reversible as an additional-aid in providing axial movement. The moved textiles to be dried collapse in this case during the stop on reversal of the direction of rotation and they are again available in this form for axial movement. The obliquely extending ribs conduct the textiles to be dried into the stream of hot air which is blown axially into the drum from the rear. (Dryers of this type are also known under the trademark ORTEX").
  • lt is one object of the present invention to provide a novel and advantageous dryer by which optimum tumtion of the drum as the ribs engage the textiles) forming an angle .a, with the radius of the drum going through the apex of the rib which angle is preferably at least 20 and up to about 40 and preferably about 30.
  • the rib also has a lagging flank forming an acute angle 0: with the radius of the drum going through the apex of the rib.
  • Said angle 0:: is larger than the angle of friction of the laundry to be dried and exceeds 30.
  • it is at least 40 but, of course, less than 90, since at 90 conveying ceases and below 40 friction becomes noticeable and the output decreases considerably.
  • Opti mum results are achieved with an angle a 2 equal to 50 to 60.
  • Said lagging flank is provided with slide plates forming an acute angle [3 with the radius of the drum going through the apex, for unloading the drum of the goods to be dried, said angle being at least 45.
  • Preferably said angle is between about 55 and about Best results are obtained at an angle of about 60.
  • the upper limit is between about and about
  • the difference between the angles a and B determines the shape of the slide plates in projection whereby B 11 should be greater than 15 so that the slide plate can become effective.
  • angle a of 20 or greater, the angle of attack of-the force acting in the direction of gravity is greater than the angle of repose 8 in the region of the point of separation of the goods being dried as a result (inter alia) of the interplay between centrifugal force and the weight of the goods.
  • the conditions for tumbling are changed in advantageous fashion by the development and shape imparted to the ribs in accordance with this invention, because by means thereof an optimum droppirigcurve (trajectory) is obtained.
  • the particular advantage resides in elimination of a complicated unloading device, due to -according to the prior art.
  • the lagging flanks of the ribs with the slide order toobtain rapid axial conveyance is an angle 7 equal to 45 to 70. Best results are achieved with an angle of about 60.
  • The'distance between the slide plates is selected in such a'manner, forinstance, that a textile piece is conveyed by successive slide plates in turn.
  • Slide plates can also-be movable and insertable in recesses in the ribs whereby an insertion therein is made possible.
  • FIG. 1 is an idealized cross-sectional view of a dru
  • FIG. 2 is a fragmented perspective front view of a preferred embodiment of a dryer according to the present invention.
  • FIG. 3 is an idealized cross-sectional view of a drum in accordance with the present invention.
  • FIG. 4 is a top view of a rib of FIG. 3.
  • FIG. 5 is an idealized cross-sectional view of a drum with another embodiment of a rib according to the present invention.
  • FIG. 6 is a perspective view akin to FIG. 4.
  • FIG. 7 isan idealized cross-sectional view of part of the drum according to this invention with a rib at the position of separation of the textiles to be dried therefrom.
  • FIGS. 8a and 8b are somewhat idealized crosssectional views of a drum according to an embodiment of this invention with retractable slide plates.
  • FIG. 1 shows a conventional drum 1 to describe the drop curves (trajectories of the textiles being dried).
  • Triangular-sectional longitudinal rib 2 has height 3 and flank angles at with respect to a radius of the drum passing through the apex of the rib. The apex of the rib is parallel to the axisof the drum.
  • housing 100 with hot air which is conducted through drum 1 due to suction induced by fan 12 which draws air through and discharges it from housing 100.
  • Ribs 102 are provided in the drum to produce tumbling of the goods, introduced into drum through charging door 13.
  • Flap valves 14 are provided in the air intake for regulating hot air flow and for blending fresh air therewith.
  • Brushes 15 are arranged between the inner wall of housing 100 and the outer wall of drum 1 to prevent hot air from flowing around the drum rather than through it and consequently through the goods.
  • the dryer is equipped with air outlet 16, a timer and a thermostat (not shown).
  • Radiator 11 can be heated, for instance, by steam or electricity.
  • the goods to be dried are introducedinto drum 1 through charging door 13.
  • Radiator 11 is then A heated.
  • Flap valves 14 are swung toward the side walls In addition to drop curves 5 and 6 which have already vdrive 10 (coupled to roller 9) which regulates speed and sense of rotation drum 1.
  • Radiator 11 supplies I of housing 100.
  • Blower l2 draws hot air into drum 1.
  • FIG. 3 shows longitudinal rib 102 in accordance with the present invention with a steep Ieading flank 18 having angle a, for tumbling and a flat flank 19 with angle 01 on which slide plates 20 are mounted for axial conveyance and arranged with angle 3. These angles are measured from a radius of the drum which passes through the apex of rib 102.
  • the textiles 21 to be dried form a crescent-shaped pile and are divided by dotted line 22 into two masses, the centers of gravity of which lie on radii 23 and 24 respectively. Arrow 25 inFIG. 3 I
  • FIG.,4 shows the direction of the view of FIG.,4 and dotted line 26 indicatesa fall shadow 26 as used herein.
  • FIG. 4 is a top view of longitudinal rib 102 which has its apex 28 parallel to the axis of the drum and has slide plates 20 in the direction of rotation, indicated by arrow 3 during tumbling and drying and by arrow 27 for axial conveyance or discharge of the dried textiles.
  • Slide plates 20 form an angle y with apex 28.
  • the direction of sliding of the textiles 21 to be dried is indicated by arrow 29.
  • path 30 and spacing 31 are defined.
  • longitudinal rib 103 which rib, with constant direction of rotation indicated by arrows 4 or 27 for drying and axial conveyance, has on r its leading flank 108 retractable slideplates 20 which can be adjusted in indicated directions 32 between angles B. and 01,, i.e., angle 0 is variable.
  • FIG. 6 there is shown a perspective view of drum 1 with longitudinal ribs 102 and slide plates 20.
  • the various angles a a B, and 'y are indicated in FIG. 6.-
  • FIG. 7 shows rib 102, depicting resolution of forces between resultant 33 of .weight of the textiles being dried and a frictional force or angle of repose 6 with an angle of rotation of the drum in which the textiles being dried would lift off from the drum if a rib were not present.
  • Resultant 33 acts at an angle 6 which is greater in the region of the point of separation than angle of repose 6.
  • the fall shadow is produced by the time difference upon falling of the textiles being dried between the tip of rib 102 and the inner wall of drum 1, and also, to a similar extent, by the friction by the textiles 21 as a result of a difference in speed between textiles 21 and drum 1.
  • Textiles 21 form a crescent shape, as shown in FIG. 3 which thickens towards the next following rib. This crescent shape is established immediately after the textiles have dropped but it becomes more pronounced as the textiles adjust themselves to the rotation of drum 1 due to friction.
  • the annular sections are closely interwoven so that textiles with slower speeds are carried along by faster moving textiles.
  • the inner annular section (radius 24) is, however, affected by the centrifugal force to a greater extent than the outer annular section because in the case of the outer section the effect of drum friction and of push by the ribs is felt more strongly.
  • the inner annular section due to its smaller centrifugal component, separates at a somewhat earlier time and it describes drop curve 7 shown in FIG. 1. In this way a narrower region of drop between the drop curves 5 and 7 is obtained which for a given diameter of the drum, affords the greatest possible drying surface.
  • Such angle B is always greater than angle (1 and lies within the angle formed by the fall shadow edge 26 and the noted plane through the apex of the rib.
  • the slide plates 20 perform the following functions. As a result of the sliding movement of the textiles on the rib, the textiles, during one revolution of the drum, move in axial direction over path 30 shown in FIG. 4, provided that the angle of the slide plates is selected sufficiently large that the goods can be advanced thereby.
  • the distance 31 in FIG. 4 is preferably sufiiciently small so that a smaller piece of the textiles which "is not taken up by one of the slide plates 20, for instance, a handkerchief, can stillcome into contact with the next following slide plate 20 and slide down the same at least a short distance.
  • FIG. 5 By an alternate construction, shown generally in FIG. 5 and in detail in FIGS. 81: and 8b, while slide plates 20 are used for axial conveyance of the textiles being dried, there is no reversal'of direction of rotation of the drum.
  • movable slide plates are arranged on the leading flank 108 of rib 103. As seen in FIG. 5 during the drying process, they do not extend out beyond the rib or angle a. By control from the outside they are, however, pushed in the inside of the drum during the conveying phase and perform the tendable and retractable slide plates according to the alternate construction.
  • This alternate construction allows use of drum 1 for drying as well as for conveying the goods to be dried, while operating in a single sense (direction) of rotation.
  • the guide plate 20 illustrated in FIGS. 8a and 8b is pivoted around axis 34 and it carries at its outer point roller 35 which runs on movable guiding member 36.
  • Guiding members 36 are arranged around drum 1 in accordance with the pinciple of an iris diaphragm so that they can be brought nearer to the drum or they can be removed farther away therefrom; in the first instance they may form a closed ring.
  • Guide plates 20 are connectedeach to the other by means of I pins 37.
  • Rib 103 is connected pivotally with the drum about apex edge 8. Rib 103 is retained while in the drying position by spring 38 and stop 39. It is evident from F IG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)
US00349297A 1970-07-18 1973-04-09 Dryer for textiles Expired - Lifetime US3811202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702035825 DE2035825C3 (de) 1970-07-18 Trommeltrockner zum Trocknen von Wäsche o.dgl

Publications (1)

Publication Number Publication Date
US3811202A true US3811202A (en) 1974-05-21

Family

ID=5777243

Family Applications (1)

Application Number Title Priority Date Filing Date
US00349297A Expired - Lifetime US3811202A (en) 1970-07-18 1973-04-09 Dryer for textiles

Country Status (4)

Country Link
US (1) US3811202A (fi)
BE (1) BE775913A (fi)
FI (1) FI55581C (fi)
GB (1) GB1353100A (fi)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29707564U1 (de) * 1997-04-29 1997-06-19 Hab, Uli, 86156 Augsburg Vorrichtung zum Trocknen von Textilien
WO2002012614A1 (es) * 2000-08-01 2002-02-14 Girbau, Sa Máquina secadora de ropa de bombo giratorio con descarga automática
US6698107B2 (en) * 2001-06-29 2004-03-02 Lg Electronics Inc. Drum for clothes drier
DE10304300A1 (de) * 2003-02-04 2004-08-12 Stefan Werner Wäschetrockner
US20070068034A1 (en) * 2004-06-05 2007-03-29 Kim Chang W Drum of laundry dryer
US20070163144A1 (en) * 2003-05-23 2007-07-19 Lothar Dittmer Laundry drier
US20080005925A1 (en) * 2006-07-06 2008-01-10 Silvano Fumagalli Basket for washing machine, washer-dryer, and the like
US20080110044A1 (en) * 2006-11-14 2008-05-15 Robertshaw Controls Company Dryer Configured for Fresh Air Induction
US20090139108A1 (en) * 2007-12-03 2009-06-04 Electrolux Home Products, Inc. Dryer drum vane
US7627960B2 (en) * 2003-06-30 2009-12-08 General Electric Company Clothes dryer drum projections
US20110022267A1 (en) * 2009-07-21 2011-01-27 Trimble Navigation Limited Agricultural Vehicle Autopilot Rollover Risk Assessment System
US7997006B2 (en) * 2007-01-12 2011-08-16 Lg Electronics Inc. Laundry machine and control method thereof
US20120005918A1 (en) * 2010-07-09 2012-01-12 Minji Kim Method for operating clothes treating apparatus
US8424220B2 (en) 2006-06-12 2013-04-23 Lg Electronics Inc. Laundry dryer and method for controlling the same
US20130342089A1 (en) * 2012-02-16 2013-12-26 YoungJoo Lee Laundry treating apparatus
US20140137425A1 (en) * 2012-11-22 2014-05-22 Samsung Electronics Co., Ltd. Lifter and drying machine having the same
US8931186B2 (en) 2006-02-20 2015-01-13 Lg Electronics Inc. Drying machine and method for controlling the same
WO2015029065A3 (en) * 2013-08-28 2016-05-26 Aditya Birla Science & Technology Company Limited Rotary dryer for drying bulk solids

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546554A (en) * 1982-11-30 1985-10-15 Cissell Manufacturing Company Clothes dryer having variable position motor and moisture sensor

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29707564U1 (de) * 1997-04-29 1997-06-19 Hab, Uli, 86156 Augsburg Vorrichtung zum Trocknen von Textilien
WO2002012614A1 (es) * 2000-08-01 2002-02-14 Girbau, Sa Máquina secadora de ropa de bombo giratorio con descarga automática
US6698107B2 (en) * 2001-06-29 2004-03-02 Lg Electronics Inc. Drum for clothes drier
DE10304300A1 (de) * 2003-02-04 2004-08-12 Stefan Werner Wäschetrockner
US20070163144A1 (en) * 2003-05-23 2007-07-19 Lothar Dittmer Laundry drier
US8661707B2 (en) * 2003-05-23 2014-03-04 Bsh Bosch Und Siemens Hausgeraete Gmbh Laundry drier
US7627960B2 (en) * 2003-06-30 2009-12-08 General Electric Company Clothes dryer drum projections
US20070068034A1 (en) * 2004-06-05 2007-03-29 Kim Chang W Drum of laundry dryer
US7836607B2 (en) * 2004-06-05 2010-11-23 Lg Electronics Inc. Drum of laundry dryer
US9206542B2 (en) 2006-02-20 2015-12-08 Lg Electronics Inc. Drying machine and method for controlling the same
US8931186B2 (en) 2006-02-20 2015-01-13 Lg Electronics Inc. Drying machine and method for controlling the same
US8424220B2 (en) 2006-06-12 2013-04-23 Lg Electronics Inc. Laundry dryer and method for controlling the same
US20080005925A1 (en) * 2006-07-06 2008-01-10 Silvano Fumagalli Basket for washing machine, washer-dryer, and the like
US7661203B2 (en) * 2006-07-06 2010-02-16 Candy S.P.A. Basket for washing machine, washer-dryer, and the like
US20080110044A1 (en) * 2006-11-14 2008-05-15 Robertshaw Controls Company Dryer Configured for Fresh Air Induction
US7997006B2 (en) * 2007-01-12 2011-08-16 Lg Electronics Inc. Laundry machine and control method thereof
US8065816B2 (en) 2007-12-03 2011-11-29 Electrolux Home Products, Inc. Dryer drum vane
US20090139108A1 (en) * 2007-12-03 2009-06-04 Electrolux Home Products, Inc. Dryer drum vane
US20110022267A1 (en) * 2009-07-21 2011-01-27 Trimble Navigation Limited Agricultural Vehicle Autopilot Rollover Risk Assessment System
US8806775B2 (en) * 2010-07-09 2014-08-19 Lg Electronics Inc. Method for operating clothes treating apparatus
US20120005918A1 (en) * 2010-07-09 2012-01-12 Minji Kim Method for operating clothes treating apparatus
US20130342089A1 (en) * 2012-02-16 2013-12-26 YoungJoo Lee Laundry treating apparatus
US9540757B2 (en) 2012-02-16 2017-01-10 Lg Electronics Inc. Laundry treating apparatus
US20140137425A1 (en) * 2012-11-22 2014-05-22 Samsung Electronics Co., Ltd. Lifter and drying machine having the same
US9435064B2 (en) * 2012-11-22 2016-09-06 Samsung Electronics Co., Ltd. Lifter and drying machine having the same
WO2015029065A3 (en) * 2013-08-28 2016-05-26 Aditya Birla Science & Technology Company Limited Rotary dryer for drying bulk solids

Also Published As

Publication number Publication date
DE2035825B2 (de) 1977-06-23
GB1353100A (en) 1974-05-15
FI55581C (fi) 1979-08-10
FI55581B (fi) 1979-04-30
DE2035825A1 (de) 1972-01-27
BE775913A (fr) 1972-03-16

Similar Documents

Publication Publication Date Title
US3811202A (en) Dryer for textiles
US3729834A (en) Laundry dryer with oblique tumbling vanes
JP2003019396A (ja) 衣類乾燥機のドラム
US4547935A (en) Waste grid for a textile fiber processing machine
US3789513A (en) Pneumatic dryers
CN101082163A (zh) 洗涤干燥机
US2744338A (en) Apparatus for drying friable material
US1571076A (en) Drying machine
US2879607A (en) Drier of the sieve-drum type
US3622134A (en) Linen-drying cabinet, more particularly for clothing, linen and the like
US3645010A (en) Clothes drier
US3512265A (en) Process and apparatus for the contac-tfree treatment of materials which can be stressed in a lengthwise direction
US3570135A (en) Centrifugal driers especially for metallic or other parts
US3094860A (en) Rotary drum apparatus for the processing of articles
US3616545A (en) Clothes dryer with means to vary centrifugal forces on the clothes
US2488653A (en) Portable hay dehydrator
CN210261530U (zh) 一种带导向破碎结构的干燥机筒体及干燥机
US1609529A (en) Pulverizing machine
US2623299A (en) Drier
CN209243388U (zh) 一种具有摆布功能的开幅机
US4682423A (en) Centrifugal drier drum for wet granular material
CN117469957B (zh) 一种动物颗粒饲料加工烘干装置
EP1318226B1 (en) Clothes dryer with automatically unloading rotational drum
US2197277A (en) Tumbling machine
CN110864526A (zh) 一种安全添加试剂的纺织助剂烘干机