DE8703647U1 - Drum washing machine - Google Patents

Description

EBHZ«87/0Ö4

Li cent &igr; a
Patent Administration GmbH

Frankfurt/Main I

Description Drum washing machine

The innovation relates to a drum washing machine according to the preamble of patent claim 1.

A drum washing machine of this type is known from DE-OS 35 18 565

In such a drum washing machine, the washing solution is the more or less well dissolved detergents from the

The lye container is led out and over the electrically heated > The water is returned to the tub by the flow heater.

Here, the washing water is circulated or recirculated.

Flow of the washing solution through the electrically heated The water is heated accordingly by a flow heater. Circulation or recirculation of the washing solution should primarily be achieved

that the detergents or cleaning agents added to the washing solution are particularly well resolved, which makes their use in

Washing process is significantly improved. It has now been shown that

After only a few hours of operation, the

Flow cross-section of the tubular instantaneous water heater through

firmly adhering deposits are increasingly reduced. The structure The deposits on the inner wall of the instantaneous water heater are by the dirt and especially the

Fiber particles are further promoted, which form a felt-like coating

whose roughness prevents adhesion and thus the formation of a

The result is not only

a progressive reduction of the flow cross-section also a increasing deterioration of heat transfer from the external

Dumbbell tube heating element on the flowing through the water heater inside Washing liquor, which may lead to a

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overheating and thus rapid destruction of the jacket pipe heating element.

The innovation is based on the task of using simple means to

To prevent the flow heater from becoming increasingly narrower, thus preventing the flow cross-section from becoming increasingly narrower.

The solution to this problem according to the innovation can be found in the characterizing part of claim 1.

Further advantageous embodiments of the subject matter of the innovation are specified in the subclaims.

The innovation ensures that the inner wall of the tubular instantaneous water heater is kept free from deposits and thus a good and even heat transfer from the outer jacket pipe heating element to the washing solution flowing through the inside of the instantaneous water heater is always guaranteed.

Examples of the innovation are shown in the drawing and

are described in more detail below.

Show it:

Fig. 1 a tube-like electrically heated Drum washing machine equipped with water heater,

Fig. 2 and 3 enlarged individual views of the instantaneous water heater ω with different embodiments of moving bodies integrated in the instantaneous water heater.

The washing machine (1) shown in the drawing has a suds container (2) in which a perforated laundry drum (3) is housed all around. The laundry drum (3) and the suds container (2) have a circular loading opening (4) on their front side, which can be closed in the usual way by a so-called 3ulken eye door window. The suds container (2) is provided with a

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Washing machine rinsing chamber (5). A washing solution or rinsing water outlet (6) is attached to the bottom of the suds container (2), which leads to a suds pump (8). On the suds pump \ (8) is connected to a caustic return line (9), which is located in the area

the laundry drum loading opening (4) serves as a suds spray pipe (9 ¹ ).

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(9) a continuous flow heater (10) is arranged for heating the washing solution, which consists of a flow pipe (11) and an electric jacket pipe heating element (12) wound around its outer wall. A moving body (13) is advantageously inserted or housed in the flow pipe (11), which is set or moved into a rotating and linear or progressive movement by the washing solution or the like flowing through it. The arrangement of such a moving body in the heated flow pipe (11) is intended to ensure that the settling of deposits, i.e. the build-up of lint-containing deposit layers, is counteracted during the heating operating phase of the jacket pipe heating element (12) for the washing solution flowing through it.

According to Fig. 2, the moving body (13) is composed of rounded or circular disks (14, 14') in such a way that it has an approximately spherical shape or form. The spherical design of the moving body (13) creates large vortex zones around the disks (14, IV), which effectively counteracts the deposits that occur inside the flow tube (11) during the heating phase of the Rantel tube heating element (12). The moving body (13) now rises into the upper end of the flow tube (11) at the speed of the washing liquor flowing in and through as the lye pump (8) starts up. The constantly changing flow surfaces of the disks (14, 14 ^' ) in the washing liquor system result in rotating and linear or progressive movements of the body (13) in the flow tube (11). After stopping the drain pump (8), the spherical moving body (13) falls back to its original position. This process is now repeated in the

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On and off rhythm of the lye pump (8) constantly* In order to achieve a floating state of the moving body (13) in the flow pipe (11) within the pulsating wash lye flow, a material density greater than 1 is selected for this»

The moving body (13 ¹ ) shown in Fig. 3 consists of a ball (15) which is provided with or surrounded by one or more rings (16, 16'). The mode of operation of this moving body is the same as that of the moving body (13) according to Figure 2.

In the embodiment according to Fig. 4, the moving body (13'') arranged in the flow tube (11) so as to be axially movable has an elongated cross-section and is spirally wound, so that a type of rotating water guide screw (23) is created. The width of the flat moving body (13 ¹¹ ) is selected to be slightly smaller than the inside diameter of the flow tube (11), on whose inside wall the moving body (13) is guided. This ensures that when the moving body (13 ¹¹ ) rotates, there is constant contact with the inside casing of the flow tube (11), thus preventing the build-up of deposits. The required torque of the moving body (13 ¹¹ ) is achieved by converting the energy contained in the washing solution flowing through it into mechanical energy. In order to absorb the axial thrust in the moving body (13 ¹¹ ) that occurs in the direction of flow of the washing liquor, a support bearing (16) is provided at the upper end of the flow tube (11), against which the moving body (13*') acts with an associated rotary attachment (17). The floating state of the moving body (13 ¹¹ ) in the pulsating liquor flow should also ensure an axial movement within the flow tube (11). This is achieved by selecting a material density for the moving body (13' ^!l ) that is between 2 and 2.4 grams/cm mass.

Claims (8)

EBHZ-87/Ü04 &ogr; Ku/kn 09.03.87 L i c e &eegr; t i a Patent-VerwaLtungs-GmbH Frankfurt/Main Protection claims 1. Drum washing machine, the laundry drum of which is housed in a &iacgr; A lye container provided with a laundry loading opening is arranged all around, which is connected to a detergent dispensing chamber, and on the bottom of which a washing lye or rinsing water outlet controlled by a lye pump is attached, with which a lye return line leading to the lye container or to the laundry drum is connected to an intermediate continuous flow heater, which consists of a flow pipe and an electrical jacket pipe heating element wound around its outer wall, characterized in that in the flow pipe (11) a A stationary moving body (13, 13', 13'·) is inserted, which can be set into a rotating and linear or axial movement by the liquid flowing through it. 2. Drum washing machine according to claim 1, characterized in that the moving body (13) consists of rounded discs (14, 14') which are assembled in such a way that the moving body has an approximately spherical shape or form (Fig. 2). 3. Drum washing machine according to claim 1, characterized in that the weighting body (13') consists of a ball (15) which is provided with or surrounded by one or more rings (16, 16') (Fig. 3), 4. Drum washing machine according to claim 1 or one of the following, characterized in that a material density greater than 1 is selected for the moving bodies (13, 13'). EBHZ-87/004 , Ku/kn _J 09.03.87 5. Drum washing machine according to claim 1, characterized in that the moving body (13 ¹¹ ) has an elongated cross-section and is wound in itself (Fig. 3). 6. Drum washing machine according to claim 1, characterized in that the moving body (13 ¹¹ ) is designed as a water guide section (23) rotating and axially movable in the flow pipe (11). 7. Drum washing machine according to claim 5 or 6, characterized in that a support bearing (16) is provided for the moving body (13 ¹ ) at the upper end of the flow tube (11). 8. Drum washing machine according to claim 5 or one of the following, characterized in that a material density of between 1 and 2.4 grams/cm mass is selected for the moving body (13 ¹¹ ).