GB2369424A - Tumble dryer - Google Patents

Tumble dryer Download PDF

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Publication number
GB2369424A
GB2369424A GB0028794A GB0028794A GB2369424A GB 2369424 A GB2369424 A GB 2369424A GB 0028794 A GB0028794 A GB 0028794A GB 0028794 A GB0028794 A GB 0028794A GB 2369424 A GB2369424 A GB 2369424A
Authority
GB
United Kingdom
Prior art keywords
lt
gt
sep
tumble dryer
tb
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.)
Withdrawn
Application number
GB0028794A
Other versions
GB0028794D0 (en
Inventor
John Peter Richards
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.)
General Domestic Appliances Ltd
Original Assignee
General Domestic Appliances Ltd
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 General Domestic Appliances Ltd filed Critical General Domestic Appliances Ltd
Priority to GB0028794A priority Critical patent/GB2369424A/en
Publication of GB0028794D0 publication Critical patent/GB0028794D0/en
Publication of GB2369424A publication Critical patent/GB2369424A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry driers
    • D06F58/02Domestic laundry driers having drier drums rotating about a horizontal axis

Abstract

A vented tumble dryer which draws air in through an inlet 9 along the direction of arrow A, heats it and propels it in region 7 through the drum of the tumble dryer in the direction of arrow B, and allows it to escape through outlet 10 in the direction of arrow C has flaps 11 and 12 which may optionally block the inlet and outlet to set up a re-circulation path in the direction of dotted arrow D in order to operate the dryer first in a re-circulation mode and then in a vented mode.

Description

TUMBLE DRYER <img class="EMIRef" id="024183632-00010001" />

<tb> This <SEP> invention <SEP> relates <SEP> to <SEP> tumble <SEP> dryers, <SEP> especially <SEP> vented <SEP> tumble <SEP> dryers. <tb>

A <SEP> tumble <SEP> dryer <SEP> gently <SEP> tumbles <SEP> wet <SEP> clothes <SEP> in <SEP> a <SEP> current <SEP> of <SEP> warm <SEP> air <SEP> usually <SEP> after <SEP> they <tb> have been spun in a washing machine. Moisture is evaporated until the clothes are dry.

The air entering the inlet of the tumble dryer is drawn from the room in which the tumble dryer is located, and the moist air after it has passed over the clothes emerges from an outlet in the tumble dryer. The outlet could feed into the room containing the tumble dryer if well ventilated, or the moist air can be ducted directly to the outside.

The stream of warm air is produced by means of a fan and a heater, the output of which stays constant over the period of operation of the tumble dryer.

Heat transfer, however, is relatively inefficient in the early stages of the drying process because the lower vapour content of the air surrounding the load naturally reduces the amount of water vapour which is swept into the warm air stream.

The invention provides a vented tumble dryer including means optionally to re-circulate the air.

This permits the warm air to be re-circulated in the early stages of the drying process.

The means optionally to re-circulate the air may include hinging flaps. <img class="EMIRef" id="024183632-00020001" />

<tb> One <SEP> way <SEP> of <SEP> carrying <SEP> out <SEP> the <SEP> invention <SEP> will <SEP> now <SEP> be <SEP> described <SEP> in <SEP> detail, <SEP> by <SEP> way <SEP> of <tb> example, <SEP> with <SEP> reference <SEP> to <SEP> the <SEP> accompanying <SEP> drawing, <SEP> which <SEP> is <SEP> an <SEP> axial <SEP> section <SEP> of <SEP> the <tb> tumble dryer of the invention.

Referring to the drawing, the tumble dryer consists of a drum 1 which is rotatable about a horizontal axis 2 by means of a motor (not shown). The drum has an opening 3 at its front end and a perforated area 4 at its rear end. The cabinet 5 in which the drum is mounted is closed at the front by a door 6 which partly closes the opening 3 in the front of the drum. However, sufficient gap is left around the periphery of the door 6 to allow warm air to pass freely through the perforated region 4 and out through the opening 3.

The air is heated by means of a heater (not shown) in a space 7 in the cavity, which also houses a fan 8. Air is drawn in through inlet 9, and passes along the paths defined by the arrows A, B, C.

As thus described, the tumble dryer operates in a conventional vented mode. The air intake A may draw air from the room in which the tumble dryer is sited, and it may discharge it through outlet 10 into the same room, or outlet 10 may be coupled to a duct to vent the moist air where desired. In operation, the moist load is dried by operating the heater and fan to set up the vented flow along the arrows A, B, C.

In accordance with the invention, hinged flaps 11 and 12 are pivotable to produce an optional re-circulation mode. <img class="EMIRef" id="024183632-00030001" />

<tb> Thus, <SEP> flap <SEP> 11 <SEP> normally <SEP> closes <SEP> off <SEP> aperture <SEP> 13 <SEP> in <SEP> internal <SEP> panel <SEP> 14, <SEP> and <SEP> flap <SEP> 12 <SEP> normally <tb> closes <SEP> off <SEP> aperture <SEP> 15 <SEP> in <SEP> internal <SEP> panel <SEP> 16. <tb>

In accordance with the invention, in the first (warm-up) phase of the drying process, the flap 11 is pivoted (to the dotted position) to close off duct 17 which leads to outlet 10.

Duct 17 is cylindrical but has an oblique end surface to engage with the flap 11.

Similarly, flap 12 is pivoted (to the dotted position) to block duct 18 which communicates with inlet 9. Duct 18 is also a cylindrical tube cut off obliquely in order to engage with flap 12.

Thus, the flaps 11 and 12 are optionally pivotable to close the inlet and the outlet 10, thereby setting up a re-circulation flow path which now includes the arrow B and the dotted arrow D. When the load has been heated sufficiently, the warm-up phase is succeeded by a drying phase. Thus, the flaps 11 and 12 revert to the full line position shown in the drawing, so that normal vented flow takes place. In these conditions, the pick-up of moisture from the clothes is far quicker, and there is an overall saving in the time the dryer takes to dry a load.

The flaps are controlled automatically during the drying operation. However, they could be operated manually if desired.

Although the invention has been described in relation to a tumble dryer, the invention is also applicable to a washer dryer. Also, while the direction of flow of the wann air has <img class="EMIRef" id="024183632-00040001" />

<tb> been <SEP> described <SEP> as <SEP> being <SEP> diverted <SEP> by <SEP> hinging <SEP> flaps, <SEP> other <SEP> methods <SEP> of <SEP> diverting <SEP> the <SEP> warm <tb> been <SEP> descnueu <SEP> <tb> air <SEP> flow <SEP> may <SEP> be <SEP> adopted. <tb>

Claims (5)

  1. CLAIMS 1. A vented tumble dryer including means optionally to re-circulate the air.
  2. 2. A tumble dryer as claimed in Claim 1, including hinging flaps to re-circulate the <img class="EMIRef" id="024183633-00050001" />
    <tb> air. <tb>
  3. 3. <SEP> A <SEP> tumble <SEP> dryer <SEP> as <SEP> claimed <SEP> in <SEP> Claim <SEP> 2, <SEP> in <SEP> which <SEP> the <SEP> hinging <SEP> flaps <SEP> open <SEP> and <SEP> close <tb> inlets <SEP> and <SEP> outlets <SEP> for <SEP> the <SEP> air <SEP> flow <SEP> through <SEP> the <SEP> dryer. <tb>
  4. 4. A tumble dryer as claimed in any one of Claims 1 to 3, in which a drying operation is arranged to consist of a first period of re-circulation followed by a second period of vented flow.
  5. 5. A vented tumble dryer substantially as herein described with reference to the accompanying drawings.
GB0028794A 2000-11-24 2000-11-24 Tumble dryer Withdrawn GB2369424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0028794A GB2369424A (en) 2000-11-24 2000-11-24 Tumble dryer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0028794A GB2369424A (en) 2000-11-24 2000-11-24 Tumble dryer

Publications (2)

Publication Number Publication Date
GB0028794D0 GB0028794D0 (en) 2001-01-10
GB2369424A true GB2369424A (en) 2002-05-29

Family

ID=9903884

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0028794A Withdrawn GB2369424A (en) 2000-11-24 2000-11-24 Tumble dryer

Country Status (1)

Country Link
GB (1) GB2369424A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1389644A1 (en) * 2002-08-13 2004-02-18 Lg Electronics Inc. Air-exhaust type clothes tumble dryer
EP1657349A2 (en) 2004-11-06 2006-05-17 LG Electronics, Inc. Drying machine and drying machine with washing function and method of controlling the same
EP2163679A1 (en) * 2006-05-02 2010-03-17 Electrolux Home Products Corporation N.V. Dryer with drying sequence using an additive
EP1950339A3 (en) * 2003-01-25 2010-04-21 Electrolux Home Products Corporation N.V. Laundry drier with circulated air and method for treating laundry

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750304A (en) * 1971-09-24 1973-08-07 Westinghouse Electric Corp Semi-recirculatory system for a clothes dryer
GB2052707A (en) * 1979-05-24 1981-01-28 Challenge Cook Bros Inc Method and apparatus for drying fabrics
GB2106228A (en) * 1981-09-01 1983-04-07 Textima Veb K Tumble dryer
GB2143627A (en) * 1983-07-22 1985-02-13 Challenge Cook Bros Inc Laundry dryer
US4549362A (en) * 1982-01-19 1985-10-29 Haried John C Programmable air recirculator/mixer for a fabric dryer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750304A (en) * 1971-09-24 1973-08-07 Westinghouse Electric Corp Semi-recirculatory system for a clothes dryer
GB2052707A (en) * 1979-05-24 1981-01-28 Challenge Cook Bros Inc Method and apparatus for drying fabrics
GB2106228A (en) * 1981-09-01 1983-04-07 Textima Veb K Tumble dryer
US4549362A (en) * 1982-01-19 1985-10-29 Haried John C Programmable air recirculator/mixer for a fabric dryer
GB2143627A (en) * 1983-07-22 1985-02-13 Challenge Cook Bros Inc Laundry dryer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1389644A1 (en) * 2002-08-13 2004-02-18 Lg Electronics Inc. Air-exhaust type clothes tumble dryer
EP1950339A3 (en) * 2003-01-25 2010-04-21 Electrolux Home Products Corporation N.V. Laundry drier with circulated air and method for treating laundry
EP1657349A2 (en) 2004-11-06 2006-05-17 LG Electronics, Inc. Drying machine and drying machine with washing function and method of controlling the same
EP1657349A3 (en) * 2004-11-06 2011-05-11 LG Electronics, Inc. Drying machine and drying machine with washing function and method of controlling the same
EP2163679A1 (en) * 2006-05-02 2010-03-17 Electrolux Home Products Corporation N.V. Dryer with drying sequence using an additive
EP2163678A1 (en) * 2006-05-02 2010-03-17 Electrolux Home Products Corporation N.V. Dryer with drying sequence using an additive

Also Published As

Publication number Publication date
GB0028794D0 (en) 2001-01-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)