US3616547A - Dryer - Google Patents

Dryer Download PDF

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Publication number
US3616547A
US3616547A US877058A US3616547DA US3616547A US 3616547 A US3616547 A US 3616547A US 877058 A US877058 A US 877058A US 3616547D A US3616547D A US 3616547DA US 3616547 A US3616547 A US 3616547A
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US
United States
Prior art keywords
air
fan
drum
dryer
wall
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
US877058A
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English (en)
Inventor
Fredrik Adolf Schuurink
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Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3616547A publication Critical patent/US3616547A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a dryer and more particularly to a dryer for laundry of the type with a drum rotatable about an axis in a stationary casing, in which the drying air is supplied to an enclosure surrounding a fan which blows the air through the central portion of one of the drums walls and the drum is provided with apertures to discharge the drying air, the wall of the casing at the side of said drums wall being provided with at least one opening for supplying fresh air and a heating device for the fresh air being provided between said openings and the fan.
  • Such a dryer is known from the Dutch Pat. 109,682.
  • this known dryer during the drying process the laundry will pass before said central portion of said drums wall, where it will be blown apart and dried by the heated air blown into the drum by the fan.
  • the drying effect of this known dryer is very good, it appeared that this dryer has the disadvantage that lint deposits inside the casing due to the fact that in the presence of laundry before the fan air will flow back in the middle of the fan taking along lint falling at the rearside of the dryer.
  • the general object of the invention is to remove said disadvantages.
  • the dryer of the invention is characterised in that coaxially with the axis of the fan and spaced from said wall of the casing there is provided a sheet around which the fresh air is supplied.
  • the heating device is arranged between the sheet and the fan. (In this way said sheet also serves to reduce the temperature of the outer wall of the casing. Besides, because the fresh air is supplied through openings in the outer wall into the space between the sheet and the outer wall, the heated sheet is cooled by said air in this way improving the efficiency of the heating device.
  • the drawing is a side view in section showing the drum within its casing.
  • a drum 1 of the dryer rotatable about its horizontal axis has in its front wall 2 a filling opening 3, the rear wall 4 being formed as a frustum of a cone.
  • the air is discharged from the drum 1 through apertures 7 in the front wall 2 alongside the filling opening 3 and is then passed through the spaces between the portion of the frontwall 2 of the drum 1 provided with apertures 7 and the wall 8 of the stationary casing, between the cylindrical wall 9 of the drum 1 and the wall 10 of the casing, and between the rear wall 4 of the drum and an intermediate wall 11 of the casing to an annular slit 12 between the rear end of the enclosure 6 and the inner edge 13 of intermediate wall 11 of the casing. From there the air passes again through the enclosure 6 into the drying space.
  • an opening 15 communicating the space between the rear wall 4 of the drum and the intermediate wall 11 of the casing with the atmosphere, through which a portion of the drying air is driven to the atmosphere.
  • the opening formed by the inner edge 13 in the intermediate wall 11 communicates through openings 20 in the rear wall 14 of the casing, an annular opening 16, formed by sheet 17 provided in the casing and the rear wall 14 of the casing, and an annular duct 18 formed by the sheet 17 and the intermediate wall 11 in communication with the atmosphere.
  • an electrical heating device 19 is provided between the sheet 17 and the fan 5 serving to heat the fresh air suctioned along by the air passing through the slit 12 as in an ejector.
  • the path of the air passing through the device is indicated by full arrows.
  • the laundry will come before the central portion of the rear wall of the drum where it is blown apart and dried by the air blown inside the drum by means of the fan 5, this giving an excellent drying effect.
  • the air will flow back. Because there is always lint in the air during a period of the drying process this should result in deposition of lint in the casing against its rear wall 14. This is, however, according to the invention prevented by the sheet 17, because the air flowing back is stopped by it and then drawn again inside the drum with the fresh air by the fan 5, as indicated by dotted lines.
  • the opening 15 can be provided with a lint filter.
  • Sheet 17 not only makes frequent cleaning of the dryer unnecessary, but also gives a protection from heat radiation of the rear wall if the heating device 19 is provided at the given position. Besides the heat of sheet 17 will be removed by the fresh air entering the openings 20 in this way improving the heat efficiency of the dryer.
  • the invention is not limited to the specific form disclosed, but can also be applied to all dryers in which flowing back of the air might occur.
  • a dryer especially for laundry, having a drum rotatable about an axis in a stationary casing, in which the drying air is supplied to an enclosure surrounding a fan which blows the air through the central portion of one of the drum walls the drum being provided with apertures to discharge the drying air, the wall of the 3 a heating device for the fresh air positioned between said sheet and said fan.
  • a drying tumbler comprising:

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
US877058A 1968-11-20 1969-11-14 Dryer Expired - Lifetime US3616547A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6816567A NL6816567A (enrdf_load_stackoverflow) 1968-11-20 1968-11-20

Publications (1)

Publication Number Publication Date
US3616547A true US3616547A (en) 1971-11-02

Family

ID=19805210

Family Applications (1)

Application Number Title Priority Date Filing Date
US877058A Expired - Lifetime US3616547A (en) 1968-11-20 1969-11-14 Dryer

Country Status (5)

Country Link
US (1) US3616547A (enrdf_load_stackoverflow)
DE (1) DE1957794A1 (enrdf_load_stackoverflow)
FR (1) FR2023719A1 (enrdf_load_stackoverflow)
GB (1) GB1239704A (enrdf_load_stackoverflow)
NL (1) NL6816567A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5191056A (enrdf_load_stackoverflow) * 1975-02-07 1976-08-10
US4207686A (en) * 1977-12-19 1980-06-17 Fedders Corporation Air heater arrangement for a clothes dryer
US20090100697A1 (en) * 2007-10-18 2009-04-23 Bsh Bosch Und Siemens Hausgeraete Gmbh Fluff filter apparatus and domestic appliance containing such a fluff filter apparatus
US7765716B2 (en) * 2007-11-05 2010-08-03 Daewoo Electronics Corporation Dryer having intake duct with heater integrated therein
US7992322B2 (en) * 2007-11-05 2011-08-09 Daewoo Electronics Corporation Dryer having intake duct with heater integrated therein

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4665628A (en) * 1986-03-31 1987-05-19 Raytheon Company Recuperative clothes dryer with enhanced recirculation and air flow

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5191056A (enrdf_load_stackoverflow) * 1975-02-07 1976-08-10
US4207686A (en) * 1977-12-19 1980-06-17 Fedders Corporation Air heater arrangement for a clothes dryer
US20090100697A1 (en) * 2007-10-18 2009-04-23 Bsh Bosch Und Siemens Hausgeraete Gmbh Fluff filter apparatus and domestic appliance containing such a fluff filter apparatus
US7765716B2 (en) * 2007-11-05 2010-08-03 Daewoo Electronics Corporation Dryer having intake duct with heater integrated therein
US7992322B2 (en) * 2007-11-05 2011-08-09 Daewoo Electronics Corporation Dryer having intake duct with heater integrated therein

Also Published As

Publication number Publication date
DE1957794A1 (de) 1970-06-18
NL6816567A (enrdf_load_stackoverflow) 1970-05-22
FR2023719A1 (enrdf_load_stackoverflow) 1970-08-21
GB1239704A (enrdf_load_stackoverflow) 1971-07-21

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