DE1460953A1 - Thermostatically controlled, electrically heated washing machine - Google Patents

Description

<arl A, Brose - "." _ "

Dipl.-Ing. ·. * · ■■

KMrSfc2-iiLMtiMim7a (»7O j

E / We Munich-Pullach, February 14, 1963

Herzog & Larven ft.m.b.H., Xanten / Ndrh., Sonsbeoker Str. 40-4-4 'and Otto DoId, Fellbach-Stuttgart, Eppinger Str. 7

Thermostatically controlled, electrically heated washing machine

The invention relates to a thermostatically controlled, electrically heated washing machine with a timer for automatic Shutdown after an adjustable. Operating time Is provided.

Electrically heated washing machines are known in which the heating aschprogrammee dnrch a program switch at a particular time of ^w? is switched on or off. It is also known to monitor the temperature of the washing liquor by a thermostat which switches off the heating after the set target temperature has been reached for the first time. The disadvantage of the known washing machines, however, is that the time during which the washing process takes place at the desired washing temperature depends on the setpoint temperature of the washing liquor. This is due to the fact that, of the constant time specified by the program unit or the program switch, at a higher set temperature, a greater period of time is required for heating the ./aschl-'iufe than at a lower set temperature .ier set target temperature for: · the JiNiJ, which should run at this temperature, less

6AB OfiKälNAL 9098 15/0299

or in extreme cases no time available. Since just "at strong If the temperature is set as high as permitted for dirty laundry, this limitation of the washing time is with full Temperature at which the strongest cleaning effect occurs, very disadvantageous. A further disadvantage is that with known (ierät the target temperature is not constant after it has been reached for the first time is held, but the heating is switched off completely, so that the detergent solution cools down during the washing process *

The invention has set itself the task of avoiding of the aforementioned guard parts to create an electrically heated washing machine, with which the ¥ ash time at full temperature an adjustable timer can be specified xver ^ en, namely

"/ regardless of the duration of the warm-up process, / a simple, cheaper and more reliable construction is sought.

According to the invention this is achieved in that in the movement area a built-in timer in the washing machine, an electrically controlled inhibiting device is arranged, which after the first time the target temperature set on the thermostat is reached releases the timer.

The inhibiting device is preferably designed in such a way that, in the non-excited state, it stops the timer running automatically prevents, but allows its adjustment by hand. The heme arrangement can consist of a resilient pawl that engages a ratchet wheel of the timer or acts like a brake be formed with an expression.

According to a particular feature of the invention, the inhibiting device contains 'as the active element, i.e. that which causes the movement

WHEEL

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Link one in the area of an electrical heating resistor ~ " arranged bi-metal strips, which in the "preferred embodiment" are independent of the electric heating element of the washing machine is trained.

In the drawings, in which several embodiments of the invention Washing machine "are illustrated, for example, show

1 shows a longitudinal section through a washing machine designed as a laundry mover

P ⁴ ', 2 a top view of the lower part with the' boiler removed;

! 8 '5 t *''' Creation of the course of the connection line

"g. 4-a, 4o circuit diagrams of three different designs the invention; and

Fig. 5 »6 and? Details of the braking device according to the invention in plan view, side view and perspective illustration.

The Wnschrcaschine has a boiler 1, which is provided with folding handles 2 on both sides and has a drain cock at the side, from which the inner opening 81 is visible. A sealing profile ring 3 runs around the upper edge of the boiler, on which the laundry mover 4, which is designed in the form of a lid and which has a handle 5 in the middle, rests is thus over a central bolzer. 9 »which is detachable at the bottom of the lower part. The bottom of the boiler 1 has a spiral-shaped recess, which has a heating element 15 with the connections 22, 23 and the MhIer 16a

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Record thermostat 16. The radiator 15 receiving ■ Wells are covered towards the lower part 6 by an asbestos ring 50, which is from a disc, which is secured by wedges on Kettle bottom is held, is pressed against the same. At one end of the bolt is also attached to this washer.

A strain relief 48 is scraped into a side opening, through the "connecting cable, which is preferably designed as a three-wire line 49 is introduced into the lower part 6. The connection cable 49 is equipped with a plug at one end, or connected to the mains in another suitable ».-" mode, while, the other end with a wire to one with the base 6 connected ground terminal is connected, and the two remaining wires, because they are led to input terminals 18, 19. The insertion point of the cable? as well as terminals 18, 19 and 52 are protected from the radiator by a heat shield 55 ″ 15 np.ch partially shielded heat radiated below. One further cooling of the devices built into the lower part 6 through the. louvre-like air slots 51 arranged on its circumference are achieved.

On the side opposite the strain relief 48, the lower part 6 has an elongated recess a.uf, in which a preferably Switch box 53 made of plastic is installed. The switch box carries two combined into one unit Indicator lamps 17, 45, a timer or a timer 10 .and a thermostat 16, the latter being installed so that '. they can be adjusted from the outside using control buttons 10a in front of a dial screen 54. The control box 53 and the attached Devices are against the bottom of the boiler 1 through a heat shield. 56 covered.

SAB

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The Wäseheweger 4 contains (not "shown) a motor and a gear, by means of which a rotary vane 80 protruding into the wash liquor is driven. Ites gear" can be designed in such a way that the rotary movement of the motor continuously on the rotary vane 3, preferably an electrical control device 85 *, which is explained in more detail in Fig. 4-c, brings about a reversal of the rotation. Give an oscillating movement to the rotary vane, so that in this case the circuit according to "Pig. 4a and 4b is advantageous. The control device 85 is preferably arranged innerhalb- DES Wäschebewegers 4, which via a cable 83, the strain relief Wäschebeweger 34- and on the lower part 6 is a strain relief 82 _Λ - r <>;, connected with the fweist located in the lower part Schaltuns, is. . . ..

The thermostat 16 whose HihlerrohrimEinflußbereich contents of the vessel is ".laßt steplessly in any ^v / ärmegrade adjusted between 30 and .100 ⁰ O. If the boiler content exceeds the set temperature, no contact connected to the connections, 25 »26 opens, while it closes when the temperature falls below this value.

"Never switch can over the knob 10 ^ on Tjp.ufzeiter _s zvrisehen 5. TTinuten at 120 Hinuten eingeste31t?. ^r ground, so that the longest washing time werden.kann recorded without Hachstellurig. The timer TO has two switching contacts' with the Input and output connections 20a, 20 _and 28a, 28b respectively, which are closed during the expiry of the set time and are open after the time has elapsed ", ■ ·;. ·; ■ - .. · ... ■ . ■>'■■>:,. ■■. ... -. ·, ·

Between the input terminal '18 and the Tinngangsan.chluß ;;

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10 int a T, r> -i.tim - 18p ντ ^Λ zwiac ^ eTi der! Rin ^ .r- ^ s klemm π. 10 .υη ^ the ^ ngnr ^ s · ^ conclusion 20 «i ^ t .., a line 1 ^Q a nn-.

' ^r eordr.pt. The output terminal 2Oh of the?> Jt switch; 10 j st via one line ·. 21 with a first connection to the "eizkömer-s 22

-during between de-r. a connection de = 5, 'thermostat to and the second connection of the heating element 15 a line 24, and between the second connection 26 of the thermostat 16 and the output connection 28b of the timer 10 a line 21 to? e-

> ■ - · ■ - · · ■■ -.-. j ei) αχ ^..: ■. ^ '^ ■.: ■ - ■. ■■ -. '■

is arranged. It is of course also possible «. the £ series

■ .- ■■■■ - ■ "ΐιιποΐΒίίΟ :,, .,; .. ·. ·., -

des (- radiators 1-5 and thernostat 16 to. ^ vertauseher.

dex - '- ^: - ^{; :: -;} - ^': - "According to the invention contains the ^r in / schmaFch ± ne built-in time switch 10 is an electrically controlled Hemneinrichtung 11, which preferably consists of a heated bimetal strip 12 by a resistor 13 ...?". Ber 'resistor 13 is designed so that _; it only has a relatively low power consumption, for example seven watts, and is arranged at the level of the bi-metal strip 12 or applied to it. It has a first connection 29 and a second connection 30 » The hemorrhage

11 or, in the present exemplary embodiment, the leaf, eta, ll strips

12 or a suitable link. <= · .Ο in Iewegunarsbereioh of the time switch, that in the non-excited state it inhibits the running of this time switch and thus prevents its contacts from opening. The time switch 10 knows / t a latch. wheel 46, in which a resilient extension of the bi-metal strip 12 engages with a pawl 47, it being possible to set the timer 10 to a certain time value even in the non-excited state of the inhibiting device. With .the Her ^ .. device; or the heated Bi- ^T: etallstreifen 12 ä.st a Tlikroschalter. _; , ("onent switch) 14 mechanically coupled. A preferred embodiment of the inhibiting device will be explained later;

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the I ¹ Ig. 3 and 5 "to 7. This microswitch is a movable contact piece connected to a connection 33", which rests against a fixed contact piece connected to a connection 36 when the Eemp. Device is not excited. The movable contact pouch ·: sleeps in the excited. State of the inhibiting device, 'without taking up an intermediate layer to a further fixed contact piece, which is connected to a terminal 34. In the embodiment illustrated in "Piß. 4 the Slialtunr 10 and the bimetallic strip 12, the heating resistor 13, the pawl 46 and the ratchet wheel 47. containing the inhibiting device 11 are combined into one structural unit.

The first connection 29 of the heating resistor 13 is connected via a line 31 either to the second output terminal 28b of the timer 10, the second connection 26 of the thermostat "J6 or to any point on the connecting line 27 between the two. A line 32 extends between the second connection 30 of the heating element 13 and the connection 33 of the microswitch 14, while a line 35 is connected between the connection 34 and the first output connection 20b of the time switch 10, the first connection 22 of the heating element 15 or the line 21 running between the two Connection 36 of the microswitch leads to the second connection 23 of the heating element 15 or to the first connection 25 of the thermostat 16 or to any point on the connection line 24.

The red indicator lamp 17 has connections 38 and 39 during the green indicator lamp 45 has the connections 40 and 41.: Between the first terminal 38 of the indicator lamp 17 and the first output terminal-20bdes Timer switch i0 or the first connection 22 of the radiator 15 and the connection line 21 is a: Line 42 arranged. Another line 43 extends

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. between the second terminal 39 of the indication lamp 17 and the first terminal 40 of the display lamp 45 while between _the;! second connection 41 -the indicator lamp 45 and the output connection 28t of the timer or the second connection 26 of the thermostat 16 or the connection socket 27 a line 41a is arranged. A line 44 extends on the one hand from the second connection 39 of the indicator lamp 17 or from the first connection 40 of the second indicator lamp 45 to the second connection 30 of the heating resistor 13 or to the connection 33 of the microswitch or to a terminal 14 connected to the connecting line between the latter two. .

A control unit 85, the preferred execution of which is siform n'- ⁿ Pig. 4c is explained in more detail, with its terminal 89 is connected via a line 86 to the connection 26 of the thermostat 16, while a line 88, the terminal 90 to the connection 40 of the glow lamp 45 and a line 87, the terminal 91 to the termination? 2 of the Radiator 15 connects. The control unit 85 supplies the motor 66 of the laundry mover via several lines 92 (four in the preferred embodiment) with energy in such a way that it changes its direction of rotation after a certain time.

According to FIG. 4c, the motor 66 has a main field winding 68 and an auxiliary fire winding 67, which is connected in series with a capacitor 69 to the two network phases behind the time switch. Ι ·: 'η bimetal strip 64 clamped on one side is the Värmewi r ^! i-ung a heating resistor 63 and is mechanically connected to a contact arrangement 65 with its free end. The resistor 63 is connected in series with a break contact parallel to the heating resistor 13, so that the arrangement 63, 64, 65 in the manner of a known flashing

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The contactor works if there is © voltage at resistor 13. The switching elements of two TJra switching contacts are each "connected to" a line phase behind the -3c " ^! -" ■ - ■. O holder The phase position of the winding 68 is reversed during the movement cycle of the bimetal strip, whereby the direction of rotation of the motor 66 is reversed. · - - · ·. ■ - '·· .. · ·,

In particular for washing machines, "where a change in the

Direction of movement is made mechanically, or such

is not desired, the connection of the motor according to EIg. 4a or 4b advantageous. ;

In the embodiment according to "Fig. 4a, in which the motor is connected in parallel to the chipping phases behind the timer 10, the motor is set in operation when the device is switched on and only switched off after it has been switched off, while in the embodiment according to FIG 4b, where the motor is located para ¹ .IeI zum ^ lderstard 13, it only starts to run when the target temperature is reached.

In FIGS .. 3 and 5 to 7, a preferred Ausführungsfοrm of the timer is illustrated in more detail "while FIGS. 1 and 2 show the outer shape (in which the terminals are deviating represented by i · ^v ig. 3) ,. '. ·

Each time switch 10, which can be designed in a known manner, contains a climbing wheel 58 * which has an anchor fork 60 with ' a restlessness 59 is connected. According to the invention is-eän Brake lever 6; 1 to prevent the after-its actuation into the ■

Steigrad 58 engages and inhibits its movement. The brake lever. consists "preferably of a T-shaped curved strip, the middle leg of which is rotatably mounted at its outer end on a plate 57 located on the back of the timer, while a leg extending in the axial direction of the timer is in the range of motion of the climbing wheel A third leg, which runs opposite to the second, projects on the back of the timer essentially L-shaped, is rotatably mounted at one end, carries near the bending point a screw acting on the "third leg of the brake lever 61 and by means of a tension spring 64 ¹⁷¹ It lies against its other linden - Bl-" metal strip 12, while its flat side against the "plunger de? HTikroBchalters 14 presses so that it is actuated. The Feiaswiffer stand 13 is arranged parallel to this bi-metal Ib tr elf en Ί 2. In an unheated state, the Bi-M§ta.l ^; lstreifen the position shown, so that by the spring 64 'DIE ippe ¥ 63 (in the drawing) can be drawn upwards and thereby the brake lever 61 against the MPACT ^TT ^ a Peder is brought into engagement with the ratchet wheel 58 62nd If the heating resistor 13 is heated by the current flowing through it, it heats the bi-metal strip 12, which (in the drawing Fig. 3) bends downwards with its left free end, the rocker 63 is pivoted downwards about its bearing point and thereby releases the Bfikarosohalter and the brake lever 61 out of engagement with the St el gr ad 58 *

According to the present invention, it is also possible to use -instead of " the bimetal strip heated by a resistor is another Drive element to be used, which when excited by an electrical

5/0 ^ 299

see · current "executes" a movement and after de-energizing in its Rest position returns .. · For example, the resistance and the "Bi-metal discharge through a relay built up Drive element to be replaced in which a Snule an anchor attracts, the anchor itself or associated suitable mechanical links in the star wheel or other moving parts of the timer intervene and the TTikr ο switch or with the Armature connected contacts actuated.

For the ^{sake of} clarity, the outline of the washing machine according to the invention is illustrated below with the aid of the diagram showing a simpler inhibiting device. 4 explained, the mode of operation of a remote device according to I ¹ Ig ;. ?, 5 to 7 in connection with the associated description is readily understandable.

If the timer 10 has expired and the washing solution and the heating resistor 13 have cooled down in a state considered first, the thermostat 16 is closed, but the entire electrical system of the machine is disconnected from the input terminals 18 and 19. The resilient extension of the bi-metal strip 12 rests with its pawl 46 on the ratchet wheel 47 in such a way that it allows the timer to be set to a specific time ₍ but prevents the timer from running in this way If a certain time is set, its contacts close and the heating element 15 is heated by the thermostat 16. At this point in time, the heating resistor 13 is bridged by the contact of the thermostat 16 and therefore cannot heat up *.

If the detergent solution reaches the target temperature for the first time, so opens the contact of the thermostat 16, creating a circuit

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from the input terminal 28a of the timer 10 via the heating resistor 13, the connections 33 and 36 'of the microswitch 14, the Radiator 15 for. other input terminal 20a of the timer 10 is created. Since the heating element 15 has a comparatively low resistance value, the heating resistor 13 heats up, as a result of which the Bi-Ivlet allstreif he. 12 bends .and on the one hand with its pawl 46 releases the timer, which begins to expire and on the other hand the movable contact of the microswitch 14. kills. Badiirch is the second connection 30 of the heating resistor 13 no longer via the radiator 15, but directly with a 4 output connection 20b of the timer 10 connected. In a r '-' ese 'way is in the following closing movements of the Thermostattη 16 of Heating resistor 13 is no longer short-circuited but “remains” heated, wherefore the pawl 46 remains released

If after the set time the timer is at its If contacts open, the entire electrical system is, as mentioned at the beginning System of the washing machine switched off, so that the heating resistor 13 cools down again. A special feature of the invention is therefore that the timer only expires, ^ enr the Thermostat has responded for the first time, i.e. only when the The detergent solution has reached the required temperature.

! If for any reason the power supply fails during the Timer 10 expires, so cools down in a short time (approx. 1 minute) the resistor 13 and prevents the bi-metal strip via its pawl 46 the further expiry of the timer. When the power supply returns, the above heats up Set the "vLaustic solution back to its" set temperature on, whereupon the washing machine is finally switched off only after the remaining period of time has elapsed.

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ν ν

It is, also -possible ,,, subsequently ,, ie- during operation *,., Corrections in the time: -, or. Temperature setting before increasing, so that the. Device can be considered foolproof 'b & zexoiw.et .. .

Due to the special arrangement, the red iba indicator lamp lights up 1: 7, only as long as the heating process lasts until the set target temperature is first reached, while the green indicator lamp 45 lights up. parallel to the heating resistor .15 _: only during a <es run®. The set time lights up, and not the p.erlodischeii switching movements of the thermostat. Ϊ6 "bee in-, flus st wirä ... .., · ..,; ■ ......-. ■. ........ '

Even if the invention is explained in more detail with the help of an example, it is clear that the invention can also be used for similar. Appliances ,, as iEr.oime washer etc. advantageously applied - if desired ,, a "certain temperature without Eücfcsicht the Amheizvorgang a festimmte time ■ ~ he izulrehalten umd then the device a" bzuschalten "!

All iD.es:chrleTluenen and: gezreierter B'inzelhelten are e.g. essential;, · . . ■ ■ -. -. ·· .-

Claims (1)

Pa te a tan sp, r \ i c ... h e. 1. Thermo-statically regulated, electrically heated washing machine, which is equipped with a timer to automatically switch off after the expiry of an inste-Ilba-ren operating tent; tO) an electrically controlled inhibiting device is arranged, - -welehe after reaching the level set on the thermostat (16). Set temperature enables the timer (10). 2. Vorrichtitng according to claim t, characterized in that the inhibiting device in the non-energized state prevents the selifstt-nti ^ en expiry of the. Time switch (10)., But allows a! Heel by hand. . . ■ " 3 α gate direction according to claim T or 2 :, dadstrch characterized, that the inhibiting device (11) as active. Element one in the area of an electrical heating resistor; e-r: stand.es (13) "arranged: bi-metal— strip (12) contains :. ' 4. Apparatus according to claim 3 ». thereby markedBichiiet.,., && £ der Hnd ' (TJ) Tom elektriachen. Radiator (T5) of the ß-eräi? E: S g'i.g. educated 5-m TofEcicihfamg: nseh Aiaapruish, 1 .oäeic 2, ds through feß? iiie; - HgfflTffRJaricht ^ oag, CTT.) As afetftr & s EleaEen ± a ^ ITagnet- ' xmä. etinsn tqe, ds ^ ren magnetic fliifi: bst.aktig ^ em. Anfeear WHEEL 6. Device according to. Claim 1 or 2, dad-arch characterized in that the locking device engages with a resilient pawl (46) on a ratchet wheel (47) of the timer (10) « 7. Device according to Claim 1 or 2, characterized in that the Hemmeinriclrtung in the non-excited. Condition with hot closing on the timer (10) 'attacks, so that it can be adjusted by hand, but not an automatic sequence. 8. Device according to claim 1 or 2, characterized. da3 the inhibiting device contains a pivotably mounted brake lever (61) which engages in the climbing wheel (58) of the timer » 9. Apparatus according to claim 1 to 8, characterized in that that with the Heiameinrichtung or the bi-metal strip (12) IV micro switch designed as a changeover switch (T momentary switch.) (14) is mechanically coupled, which is in the excited state of the inhibitor or when the bi-metal strip (12) is heated a connection between its common connection (33) and ' its first connection (36) and in the de-energized state of the Inhibitor or when the Bi-Metal3 r-strip has cooled down (12) establishes a connection between its common connection (33) and its second connection (34). 10. Device according to claims 3 »4, 8 and 9» characterized overall · denotes that the designed as a T-shaped strip Brem, · - lever (61) with its middle leg ^? ^'To' the rear ' ^£ protrudes a forwardly directed legs in ^^ ^ s ^ Bew giin ^ sbereaeh of the wheel (58) and a rearward ^leg; 'face of the timer pivotally ·' g &Üa'g'ert"actual, with 909815/0299 V- - 16 - rests against an L-shaped rocker (63), the first end of which is rotatably mounted and the second end of which is the free end of the one-sided machined Bi-metal strip (12) b-ertihrt under the action of a spring (64), the rotatably mounted leg on the microswitch (14) is applied. 11. Device according to one of claims 1 to 10, characterized in that that in a known manner a series circuit consisting of a thermostat (16) and a radiator (15) is connected via the contact or contacts of the timer (10) to the mains input terminals (18, 19) and that the first and second connection (36 or 34) of the microswitch (14) to the with the thermostat (16) connected second or »to the with ■ first connection directly connected to a mains phase (23 or 22) of the heater (15) is connected, while the common connection (33) of the microswitch (14) via the heating resistor (13) or the member of the inhibiting device to be excited with the • directly on the other chase phase connection (26) of the Thermostat (16) is connected. 12. The device according to claim 11, characterized in that ih known ViTeise the switching contact or contacts of the time switch (10) between those connected to the connecting cable (49) Input terminals (18, 19) and the total% eiq, electrical system of the Cooking pot are arranged and between its own input terminal (19) or a first output terminal (20b) of the timer (10) and a first connection (22) of the electric heater (15) a line (21) between the second connection (23) of this Radiator (15) and a connected connection (25) of the thermostat (16) a line (24), and between the second connection (26) of the thermostat (16) and a second output connection (28b) 909815/0299 of the time switch (10) a line (27) is arranged tind that 'between the second output port (28t) or the second port (26) of the thermostat (16) and a first connection (29) of the He izvri.der booth (13) a line (31) and between your second connection (30) of the Heizwiderstmades (13) and the connection (33) the switching bridge of the microswitch (14) a line (32) is arranged, while between the second terminal (34) of the Micro-holder working contact and the first connection (22) of the radiator "(ί5) or the output connection (20b) of the timer (10) a line (35) and between the first connection (36) the microswitch break contact and the second connection (2 * 3) of the radiator (15) or the first connection (25) of the thermostat (16) a line (37) is arranged. 13. Apparatus according to claim 11 or 12, characterized in that d? B a first indicator lamp (17) such with the circuit of the device is connected so that it only lights up during the heating-up period xmd after the timer (TO) has been enabled is extinguished by the inhibiting device. 14. Apparatus according to claim 11 or 12, characterized in that, dr. ° an additional indicator lamp (45) in such a way with the circuit of the device is connected that it is only after termination the heating-up period while the timer (10) is running unaffected by the working of the thermostat lights up continuously. 15. Apparatus according to claim 11 to 14, characterized in that that either between the entrance gill (19) »the first exit: output connection (20b) of the timer (10) or the first connection (22) of the heater (15) and a connection (36) of a first indicator lamp (17) a line (42) and between the other BAB its connection (39) of the first indicator lamp (17) .tind döm 'einln-' ■ connection (40) of a second. Indicator lamp (45) a line-1 [43l ·) V as well as between the other connection ('' I) of the second indicator lamp (45) and optionally the second output to the connection (28b) of the timer (10), the second connection ( 26) of the thermostat "'(16) or the first connection (29) of the heating resistor (13) a'^; Ijeitung (44) is arranged, and that either between the one connection (40) of the second indicator lamp (45) or the other terminal (39) of the first indicator lamp (17) and the second arrival ^'::> end (30) of the heating resistor (13) or the terminal (33) ""^""; the switching bridge of the microswitch (14) a line (44 ) is arranged. 16. The device according to claim 13 Ms 15, characterized in that that the indicator lamps (17, 45) are designed as grim lamps. 17. Vorrictrtnmg according to · claims 13 to 16, characterized in that the first indicator lamp (17) is designed to be red or is provided with a red cover and that the second indicator lamp (45) is designed to be green or is provided with a green cover _{or similar} 18. Apparatus according to claim 11 to 17, characterized in that that the indicator lamps (17, 45) are combined as a double control lamp to form a structural unit. 19 · Device according to one of claims 1 to 18, characterized in that that the indicator lamp (17, 45), the timer \ (10) and the thermostat (16) on a common switch box (53) are grown, which is arranged in a recess of the boiler lower part (6). 9098Ϊ5 / Ο299 20. Device according to one of claims 1 to 19 _f, characterized in that the motor (66) is connected to the two Uetzphasen behind / the timer (10). 21. Device according to one of claims 1 to 19, characterized in that that the motor (66) is switched on parallel to the heating resistor (13), 22. Apparatus according to claim 20 or 21, characterized in that, that the motor (66) is preceded by a control unit (85) which reverses its direction of rotation at predetermined time intervals. 23. Device according to one of claims 1 to 22, characterized in that that it is designed as a drum washing machine. 903815/0299