EP0082358B1 - Trommeltrockenmaschine - Google Patents

Trommeltrockenmaschine Download PDF

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Publication number
EP0082358B1
EP0082358B1 EP82111049A EP82111049A EP0082358B1 EP 0082358 B1 EP0082358 B1 EP 0082358B1 EP 82111049 A EP82111049 A EP 82111049A EP 82111049 A EP82111049 A EP 82111049A EP 0082358 B1 EP0082358 B1 EP 0082358B1
Authority
EP
European Patent Office
Prior art keywords
air
machine
intermediate plate
duet
drum
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
Application number
EP82111049A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0082358A1 (de
Inventor
Franz Müller
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.)
Bauknecht Hausgeraete GmbH
Original Assignee
BAUKNECHT HAUSGERATE GmbH
Bauknecht Hausgeraete GmbH
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 BAUKNECHT HAUSGERATE GmbH, Bauknecht Hausgeraete GmbH filed Critical BAUKNECHT HAUSGERATE GmbH
Priority to AT82111049T priority Critical patent/ATE21946T1/de
Publication of EP0082358A1 publication Critical patent/EP0082358A1/de
Application granted granted Critical
Publication of EP0082358B1 publication Critical patent/EP0082358B1/de
Expired 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 drum drying machine or drum washing and drying machine with a heating register arranged in the upper part of a drum container between a reflector plate and the laundry drum for direct irradiation of the laundry drum, an exhaust air line and with a supply air line running over the reflector plate and provided with a nozzle via which the Supply air is led into the interior of the laundry drum.
  • the air used for drying is drawn in from the surroundings of the clothes dryer in order to load the air with moisture and then to blow it out again from the clothes dryer.
  • this system it has been necessary to transport relatively large amounts of air through the tumble dryer for a relatively long time in order to dry the laundry. Since the air used for drying is usually heated with the help of heating registers and electrical heating registers are usually used, a relatively large amount of electrical energy is consumed because of the inefficient drying method.
  • the invention has for its object to provide a drum drying machine as an exhaust air dryer, in which on the one hand the consumption of electrical energy can be significantly reduced by energy-saving measures and on the other hand a significant reduction in drying times is possible due to a high economy in the removal of moisture.
  • This object is achieved in that under the cover plate of the drum drying machine to form an air collecting space a good heat-conducting to the machine interior perforator intermediate floor is arranged that opens in the intermediate floor of the intake manifold of a circular blower, which is connected with its nozzle to the supply air line, and that the cover plate after is heat insulated on the outside.
  • the waste heat radiated from the drum container and the heating register collects under the cover plate, so that the supply air sucked in through the housing interior and the air space between the cover plate and the intermediate floor can already be heated significantly above room temperature and thus less energy needed to be raised to the appropriate temperature for optimal moisture absorption.
  • the perforated intermediate floor is arranged above the heat-sensitive switching and measuring instruments in the housing of the drum drying machine. It may be useful to arrange the perforations of the intermediate floor in the edge area.
  • This measure has the advantage that the air flowing from the interior of the drum drying machine through the perforation into the air collecting space flows past the switching and measuring instruments and creates an ambient heat for the instruments which is considerably lower than in conventional exhaust air dryers.
  • the switching and measuring instruments can be kept at a temperature which is significantly lower than the maximum permissible temperature, in contrast to the current normal operation, which has the effect of improving operational safety.
  • the invention also provides that the perforation holes are arranged in the area above the heat-sensitive switching and measuring instruments.
  • the perforation holes are distributed over the intermediate floor in such a way that the supply air sucked into the air collection space via the intake connection covers essentially the entire area of the intermediate floor.
  • the intermediate floor can e.g. be made of thin copper or aluminum sheet, which is provided with webs and / or beads for stiffening and / or air guidance. This also suppresses the generation of resonance vibrations. Furthermore, the surface area relevant for heat exchange becomes larger.
  • the intermediate floor is blackened matt on the surface facing the cover plate. Accordingly, a reflective film is attached to the intermediate floor side of the thermal insulation of the cover plate.
  • a drum container 11 which is accommodated in a housing 10, consists of a drum container 11, in which a laundry drum 12 is rotatably mounted about a vertical axis mounted in a mounting ring, not shown, on the rear of the drum container.
  • the drum container is connected at its lowest point to an outlet connection 13, via which water collecting in the drum container is pumped with the aid of a waste water pump 14 via a waste water line 15.
  • An exhaust air line 18 is also connected to the outlet connection 13, via which the exhaust air emerging from the drum container is discharged to the outside.
  • the laundry drum 12 is provided on the front side with a loading opening, under the upper edge of which a supply air line 20 is led into the interior of the laundry drum.
  • This supply air line ends in the area of the loading opening in a blowing nozzle 21, via which the supply air is blown into the interior of the laundry drum 12 into the laundry to be dried.
  • the air blown into the laundry through the injection nozzle 21 has a relatively high flow rate, so that good swirling is ensured.
  • a bulge is provided in the upper region of the drum container, in which a heating register 22 is arranged. The bulge also acts as a reflector in order to direct as large a portion of the heat radiation emanating from the heating register 22 onto the surface of the laundry drum 12.
  • the laundry drum is heated and emits the heat evenly over a large area to the laundry inside.
  • the largest proportion of the energy required for the evaporation of moisture and the saturation of the air with moisture is supplied via the laundry drum, making it possible to load the supplied air as quickly as possible and up to saturation with moisture.
  • the supply air line 20 is guided via the bulge receiving the heating register 22 in a flat channel that sweeps the bulge as far as possible over the entire surface, so that the heat emitted from the drum container in this area to the outside is used for heating the air supplied through the supply air line 20 .
  • An intermediate floor 25 provided according to the invention is arranged below the cover plate 26 of the drum drying machine and in such a way that an air collecting space 27 is formed between the intermediate floor 25 and the cover plate.
  • the intermediate floor 25 is provided with a perforation 28.
  • the intake manifold 30 of a centrifugal blower 31 is attached to the intermediate floor 25 and is connected to the supply air line 20 via a connecting piece 32. This centrifugal fan 31 sucks in the air flowing through the perforation 28 into the air collecting space 27 and presses it via the supply air line 20 and the injection nozzle 21 into the interior of the laundry drum.
  • the perforation 28 in the intermediate floor 25 is preferably provided along the edge in such a distribution that the intake air drawn in from the air collection space through the intake manifold essentially covers the entire area of the intermediate floor, so that the intermediate floor made of a good heat-conducting material as much as possible can dissipate heat accumulating in the upper space of the housing.
  • the intermediate floor is blackened matt on the surface facing the cover plate. Accordingly, the side of the cover plate facing the intermediate floor is provided with thermal insulation 35, which can be covered with a reflection film toward the air collection space 27.
  • the switching and measuring instruments 35 which are generally attached to the housing, are preferably located below the perforation of the intermediate floor, so that the air sucked from the inside into the air collecting space 27 flows past the switching and measuring instruments 38.
  • the air sucked in via the interior of the drum drying machine enters from the surroundings through air inlet openings in the housing 10, it being possible for such air inlet openings 40 to be distributed around the housing.
  • These inlet openings can be conventional ventilation slots or ventilation holes and are preferably located in the lower area of the housing:
  • the ambient air sucked in through the air inlet openings for the drying process generally has a temperature between approximately 20 and 25 °. Since the waste heat rises upwards inside the housing, temperatures occur in conventional exhaust air dryers below the cover plate, which can be of the order of up to approximately 95 °. In order to utilize this waste heat, according to the invention, the supply air to the laundry drum 12 is led via the air collecting space 27, where it heats up and the temperatures in the upper region of the housing, in particular in the air collecting space, can be reduced to approximately 50 to 70 °. Due to this lowering of the temperature and the resulting air flow, the switching and Measuring instruments 38 flows around a much cooler temperature, so that these instruments are operated at temperatures that ensure very safe operation.
  • the following temperature distribution was found.
  • an air temperature of 64 ° resulted in the intake manifold 30 to the centrifugal fan 31.
  • the supply air was heated so that it had a temperature of approximately 158 ° in the area of the injection nozzles when it entered the laundry drum.
  • the absorption of moisture up to saturation results in a cooling to a value of approximately 86 ° in the area of the outlet connection 13, with further cooling occurring in the exhaust air line 18, in that heat is released via the exhaust air line to the intake air drawn in through the air inlet openings .
  • a temperature of 70 ° was measured at the outlet from the exhaust air line 18.
  • the exhaust air line 18 and a corresponding guidance of this exhaust air line in the housing 10 can ensure that the intake air sucked in via the air inlet openings 40 further cools the exhaust air guided in the exhaust air line.
  • the exhaust air duct can be designed in such a way that large-area heat exchanger surfaces result.
  • FIG. 2 shows an embodiment of the invention in which the air flow in the drum drying machine differs from the embodiment according to FIG. 1.
  • the drum container 11 with the laundry drum 12 rotatably arranged therein is likewise provided with a bulge 23 in the upper region, in which a heating register 22 is arranged.
  • This bulge acts as a reflector for the heat radiation and increases the proportion of the heat radiation directly impinging on the surface of the heat drum 12.
  • the supply air line 120 is preferably led through the bulge 23 in a flat channel following the bulge.
  • Injection nozzles 121 are provided at the edges of the bulge, via which the supply air is blown into the drum container, preferably obliquely under the heating register.
  • the injection nozzles 121 can be designed as slot nozzles which run along at least two edges of the bulge over the entire depth of the drum container 11.
  • the supply air line guided over the bulge is connected via a connecting piece 32 to the centrifugal fan 31, which removes the warm air heated by the waste heat from the air collecting space 27 between the intermediate floor 25 and the cover plate 26.
  • the intermediate floor is made of a good heat-conducting material, e.g. a thin copper sheet or a thin aluminum sheet can be used, which, although not shown in the drawing, is provided with webs or beads in order to give the intermediate floor the necessary strength. These beads and webs can also be used to influence the air flow.
  • a good heat-conducting material e.g. a thin copper sheet or a thin aluminum sheet can be used, which, although not shown in the drawing, is provided with webs or beads in order to give the intermediate floor the necessary strength. These beads and webs can also be used to influence the air flow.
  • the intermediate floor is matt blackened at least on one side, but preferably on both sides.
  • the inside of the housing 10 can be covered with an insulating layer 135 in order to avoid heat losses which can arise from radiation through the housing.
  • the materials should have a thermal conductivity greater than 200 kJ / mh ° C. Materials with a thermal conductivity above 535 kJ / mh ° C are considered to be particularly advantageous.
  • FIG. 3 shows an embodiment of the invention, which essentially has the structure of the embodiment according to FIG. 2, but is provided with a counter-air heat exchanger for further waste heat utilization, which consists of the exhaust air line 118 and an intake line 132, which leads around the exhaust air line and works together with it as a heat exchanger.
  • An extension 130 of the intake line leads the supply air drawn in past the exhaust air line 118 through the intermediate floor 25 to the air collecting space 27.
  • the extension 130 of the intake line can also be introduced directly into the intake port 30 of the centrifugal fan.
  • the exhaust air duct 118 can be configured over a large area, which with the help of corrugated pipes or pipe fins to increase the heat energy transport to the intake air.
  • a sewage system in order to discharge condensate water formed in the exhaust air line 150.
  • a wastewater system can be constructed, for example, in the manner shown in FIG. 1, but a condensate drain without a pump will be sufficient for a basic dryer.
  • the invention can also be implemented in a drum drying machine, in which, in deviation from the embodiment shown in the drawing, the laundry drum is accommodated inside the housing without a drum container.
  • the laundry drum has no perforation, the air can be sucked in at the bottom as well as at the front or rear of the housing, whereby it rises up inside the housing and is sucked in by the centrifugal fan through the perforated intermediate floor.
  • the centrifugal blower is directly connected to the supply air line, which is guided over the reflector plate of the heating register and fed directly into the interior of the laundry drum, from which it is discharged from the housing at a suitable point via an exhaust air line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
EP82111049A 1981-12-01 1982-11-30 Trommeltrockenmaschine Expired EP0082358B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82111049T ATE21946T1 (de) 1981-12-01 1982-11-30 Trommeltrockenmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813147572 DE3147572A1 (de) 1981-12-01 1981-12-01 Trommeltrockenmaschine
DE3147572 1981-12-01

Publications (2)

Publication Number Publication Date
EP0082358A1 EP0082358A1 (de) 1983-06-29
EP0082358B1 true EP0082358B1 (de) 1986-09-03

Family

ID=6147641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111049A Expired EP0082358B1 (de) 1981-12-01 1982-11-30 Trommeltrockenmaschine

Country Status (5)

Country Link
EP (1) EP0082358B1 (enrdf_load_stackoverflow)
AT (1) ATE21946T1 (enrdf_load_stackoverflow)
DE (2) DE3147572A1 (enrdf_load_stackoverflow)
DK (1) DK532782A (enrdf_load_stackoverflow)
ES (1) ES517813A0 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3900074A1 (de) * 1989-01-03 1990-07-12 Transferon Waeschereimasch Waeschetrockner (tumbler), insbesondere fuer den gewerblichen bereich

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008020556A1 (de) * 2008-04-24 2009-10-29 BSH Bosch und Siemens Hausgeräte GmbH Ablufttrockner mit verminderter Kondensatbildung sowie Verfahren zu seinem Betrieb
CN112695490B (zh) * 2020-12-16 2022-01-25 珠海格力电器股份有限公司 一种洗干机及其控制方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6900575U (de) * 1968-06-19 1969-07-24 Paolo Gaudenzi Maschine zum waschen und trocknen von waesche.
US3969070A (en) * 1975-02-12 1976-07-13 Mcgraw-Edison Company Clothes dryer with heat reclaimer
DE2545795C2 (de) * 1975-07-02 1982-09-30 August Lepper Maschinen- U. Apparatebau Gmbh, 5340 Bad Honnef Trommelwasch- und Trockenmaschine
DE2605048C3 (de) * 1976-02-10 1980-11-06 August Lepper Maschinen- U. Apparatebau Gmbh, 5340 Bad Honnef Verfahren und Vorrichtung zum Trocknen von Wäsche in einer Trommelwasch- und Trockenmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3900074A1 (de) * 1989-01-03 1990-07-12 Transferon Waeschereimasch Waeschetrockner (tumbler), insbesondere fuer den gewerblichen bereich

Also Published As

Publication number Publication date
DE3147572C2 (enrdf_load_stackoverflow) 1987-06-11
DE3147572A1 (de) 1983-06-09
ES8307950A1 (es) 1983-08-16
DK532782A (da) 1983-06-02
DE3273060D1 (en) 1986-10-09
EP0082358A1 (de) 1983-06-29
ATE21946T1 (de) 1986-09-15
ES517813A0 (es) 1983-08-16

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