DE2607372A1 - LAUNDRY DRYERS - Google Patents

Description

Licentia
Patent-Verwaltungs-GmbH Frankfurt / Main

EBHZ-76/7 February 23, 1976

TJl / kt

Clothes dryer

The invention "relates to a tumble dryer with an in a housing revolving drum with an unperforated jacket, the drying air heated by a heater Supplied via a fan on the rear wall and the moist air flow emerging from the drum through the front wall into a channel surrounding the washing receiving space of the drum is deflected and returned to the rear wall.

Such a tumble dryer is known from DT-OS 1,785,263. On the way of the humid air through the between the

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The drum and the channel formed in the housing experience high heat losses to the outside.

Furthermore, tumble dryers with a closed, over a air or water-cooled condenser guided dry air circuit known (DT-AS 2 219 889). The condensate Collected in a condensate sump and pumped out together with the cooling water or into a drainable collecting container be directed.

The invention is based on the object of designing a tumble dryer of the type mentioned at the outset in such a way that by reduction the heat losses an improvement in efficiency can be achieved.

This object is achieved according to the invention in that an annular channel for the return of moist air through an interior and the outer shell of the drum is formed. While maintaining a compact structure of the tumble dryer results in the leadership the humid air in the ring channel between the double-walled Drum good and even heat values in the laundry treatment room, as this is shielded from the cold circulating air, and furthermore, the air space between the drum outer shell and the housing leads to lower precise temperatures and to lower ones Heat losses.

A particularly advantageous embodiment of the invention results in a tumble dryer with a closed over a cooled condensation device guided dry air circuit, whereby the outer jacket of the drum has a

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te forms a condensation surface exposed to cooling water or cold air. This dryer is characterized by short Air ducts, which are also constantly in the area of the laundry receiving space, from.

The invention is explained in more detail with the aid of the drawing. It shows:

Fig. 1 is a section through the essential

union parts of a tumble dryer with completely or partially open drying air duct and

Fig. 2 is a section through a laundry

dryer with condensation device and closed drying air circuit.

The tumble dryer has a housing 1 in which a laundry room 2 surrounding a drum, which is around a horizontal Axis is rotatable and is driven by a motor 3, revolves. In one between an indentation in the rear wall of the drum 4 and the housing 1 formed suction channel 5 are behind air inlet openings 6, a fan 7 with a fan motor 8 and an electric heater 9 are arranged. About a perforated middle part 10 of the drum back wall is the Air used to dry the laundry is blown into the laundry receiving space 2. On the way through the one unperforated double

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pelmantel 11,12 having drum absorbs the air moisture and leaves the laundry receiving space through the drum end wall 13 », preferably via the one provided therein Coarse sieve 14 receiving loading opening and a lint filter 15th

Between the inner jacket 11 and the outer jacket 12 of the drum there is an annular channel 16 for the return of moist air from the front of the device, wrapping the laundry treatment room 2 back to the rear wall of the housing. To form a Exhaust duct 17 in the area of the loading opening is the The drum outer shell 12 is pulled down over the drum end wall 13 of the inner shell 11 and is also used with respect to the housing 1 and a door 18 as a bearing and sealing part.

The via the exhaust duct 17 and the annular duct 16 between the inner drum and the drum outer shell in the direction of the arrow can be returned via one or more openings 19 into the Housing 1 or can be derived directly into the room where the tumble dryer is installed. Only part of the exhaust air can also be used The flow around the inner jacket 11 is used and an exhaust air branch through the perforated door 18 into the installation room be directed. The inner and outer casing of the drum are connected to one another by spacers 20.

In the tumble dryer with condensation device according to FIG. 2, the drum outer shell 12 is on the outside e.g. cooled with cooling water via a spray tube 21. It is

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, but also possible, instead of the water for cooling the Use room air and blow cooling air onto the outer jacket by a fan. The one on the inner surface of the outer jacket 12 condensed steam can flow through an opening 22 into a collecting trough 23 and together with the cooling water Pumped out via line 24 or, in particular when cooling by circulating air, by hand by removing the drip pan 23 can be emptied. In the area of the intake channel 5, the outer jacket is pulled down over the rear wall of the drum 4- and via a seal 25 forms the counter-bearing part 26 to the support bearing 27 of the housing 1. A belt is designated by 28, via which the motor 3 drives the drum.

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Claims (1)

EBHZ-76/7 February 23, 1976 Ul / kt EXPECTATIONS 1. Tumble dryer with a drum rotating in a housing and having an unperforated jacket, the dry air heated by a heater is supplied via a fan on the rear wall and that from the drum through the front wall exiting moist air flow is deflected into a channel surrounding the laundry receiving space of the drum and is returned to the rear wall, characterized in that an annular channel (16) for the return of moist air is formed by an inner (11) and outer casing (12) of the drum. 2. Clothes dryer according to claim 1, characterized in that on the rear wall (4-) the inner drum shell (11) and on the front wall of the drum outer shell (12) with respect to the housing (1) rotatably mounted and sealed is. 3. Clothes dryer according to claim 1 and 2, characterized in that the drum outer shell (12) around the loading opening the drum and forming an exhaust duct (17) in deW ^ lint filter (15) is arranged over the end wall (13) of the inner drum shell (11) is preferred. 4. Tumble dryer according to claims 1 to 3, characterized in that the annular channel (16) on the Trom- 4/0593 " _{0R | GJNAL INSPECTED} ΕΒΗΖ-76/7 "^ * 23.2.1976 Ul / kt Melrückwand (4) opens into exhaust air openings (19) of the housing. 5- clothes dryer according to claims 1 to 4, characterized in that the door (18) for the Outlet of part of the exhaust air is perforated. 6. Tumble dryer according to claim 1, with closed over a cooled condensation device guided Dry air circuit in which the condensate is collected in a condensate sump and via a drain line can be discharged, characterized in that the outer casing (12) of the drum has a cooling water on the outside or forms a condensation surface exposed to cold air. 709834/05 93