EP0912791B1 - Method and device for unloading items of washing from a treatment machine - Google Patents

Abstract

PCT No. PCT/EP97/03017 Sec. 371 Date Jan. 27, 1999 Sec. 102(e) Date Jan. 27, 1999 PCT Filed Jun. 10, 1997 PCT Pub. No. WO98/00598 PCT Pub. Date Jan. 8, 1998In the method for unloading items of laundry from a spin-dryer or washer-dryer (20) which has a perforated operating drum (21) and a drum housing (22) with an end-side unloading opening (26) which can be closed by means of a door (27), after the spin-drying process is finished, the operating drum (21) is set to a speed at which the centrifugal force acting on the items of laundry is still somewhat greater than the force of gravity. The door (27) of the drum housing (22) is opened. The pipe of a suction conveying system is connected to the unloading opening (26) of the drum housing (22). The suction conveying system is activated, and on the drum housing (22) the closure member (29) of an air inlet opening, which is arranged on the peripheral wall, is opened. The method can also be used analogously in tumble-dryers. The device for carrying out the method has the device parts mentioned.

Description

When washing or cleaning laundry items of all kinds Kinds follow the washing or cleaning process usually several processing steps, such as Spin, dry, iron, stack and the like. The also applies to laundry items that have been washed in a washing machine Dry press are pressed, after which the very compact Press cake must be loosened before the laundry can be treated further.

Under laundry items are all kinds of textiles and understood non-textile objects that are washed, cleaned, spun, dried and otherwise treated such as Underwear, shirts, pants, dresses, smocks, Aprons, bed linen, but also cleaning rags, pug, rubber gloves, Protective covers made of plastic and the like.

At each of the processing stations mentioned above the items of laundry after completion of the processing operation concerned be removed from the machine, i.e. the machine must be unloaded so that the laundry items to next processing station can be transported. For this purpose, the items of laundry are generally made by hand from the machine concerned and removed a transport container inserted or on a transport device put on and thus to the next processing station transported. This is relatively cumbersome and time consuming and requires expensive transportation and transport facilities that are also fault and are prone to wear and a correspondingly high Require maintenance. More flexible when processing Laundry items, e.g. of cotton underwear, occurs when Often hurling an additional disadvantage by at high spin speeds from the immediately on the perforated peripheral wall of the working drum Parts of laundry in the nozzle-shaped perforations be pushed in and partly even out of these emerge outwards and out of the perforation relax again, i.e. swell something. The unloading such laundry items require an additional proportionate great effort for the operating personnel and increases the amount of time considerably. These circumstances hinder an automatic transition from the centrifugal machine to the next processing machine.

An attempt has already been made to remove the laundry items automate from the centrifugal machine in that one the centrifugal drum only with a relatively low Spin speed operates, so that the laundry itself do not set the drum wall so strongly. To unload the Centrifugal drum turns the centrifugal machine to the front Discharge opening tilted and the centrifugal drum either constantly in one direction or in both directions rotated back and forth at a lower speed to detach the laundry, so that it can then be replaced by the discharge opening inclined below can fall out. The but requires a very high construction cost for the centrifugal machine and the swivel mechanism. The connecting lines all have to be flexible. The space requirement such a centrifugal machine is larger than at fixed centrifugal machine.

When cleaning laundry items, i.e. when 'washing' the Items of laundry in a cleaning liquid, the following called laundry detergent handled in a cleaning machine that is similar a washing machine or a washer-extractor is the drum housing for cleaning operations can be sealed liquid-tight. After the cleaning process is finished, the cleaning agent deducted. The laundry items are still with one significant portion of the detergent soaked. Since this Detergents and their vapors are harmful to health, the detergent must first be completely out of the laundry be removed before opening the cleaning machine may be taken out and the laundry and for can be fed to other stations for further processing can. In general, part of the remaining detergent removed by a spin cycle. Here but can because of the crease sensitivity of some types the items of laundry do not have a very high spin speed to get voted. The portion of the Detergent is removed by a drying process, by a circulating air flow through the cleaning machine is passed through, in a downstream capacitor and / or an absorption filter the liquid and vaporized portions of the detergent become.

Since the cleaning machine mainly cleaning the Laundry in a liquid bath, the detergent, serves, it is very compact, similar to a washing machine built, i.e. have the working drum and the drum housing a relatively small void volume, so for one Cleaning process is not a large amount of detergent must be used. For the spin process then drying the laundry is the small one Cavity volume of the working drum disadvantageous because of can loosen the laundry only a little. Accordingly is the drying phase in the cleaning drum very long, generally much longer than that Cleaning phase. It is also after the full Remove the detergent unloading the cleaning machine difficult because the laundry items in her now loosened up Condition, the interior of the working drum Fill in as far as possible.

The invention has for its object methods and devices specify which of those after completing a machining operation unloading the laundry items from the concerned Processing machine lighter and easier than before is possible. This object is achieved by the in claim 1, 2, 3 or 4 specified procedures for those specified there Processing machines and by the in claims 9, 10, 11 or 12 specified devices solved.

The fact that in the washing or centrifugal washing process according to claim 1 after the end of the spinning process the working drum is set to a speed that is lower than the spin speed, but it is still is so high that the one she caused on the laundry Centrifugal force is somewhat greater than the gravitational pull is, the items of laundry are largely in circulation on the peripheral wall of the working drum. Therefore, the Door of the front discharge opening can be opened without that the laundry items fall out of the unloading opening. As a result, the laundry can also be operated without interference Pipeline of a suction conveyor to the open unloading opening of the drum housing. If the Suction conveyor is put into operation by either the suction system itself is switched on or by in Operation of a suction conveyor in a shut-off device the pipeline is opened, and if so then the Air inlet opening arranged on the peripheral wall of the drum housing is opened, arises within the drum housing a vigorous flow of air coming from the air intake from those just passing by in their area Perforations in the working drum through to the unloading opening pulls in and pulls into the pipeline. Thereby A third force acts in the area of the air inlet opening on the items of laundry just there, the greater than the excess force between the centrifugal force and is the gravitational force of the earth and this means that these laundry items detaches from the peripheral wall of the working drum. As soon as these laundry items are detached from the work drum, the centrifugal force no longer acts on them but only the gravitational pull and the thrust of the air flow the suction conveyor. This air flow promotes laundry to the discharge opening and into the pipeline connected to it into it and on to a connected one another processing station.

By constant or by intermittent opening as well by opening the air inlet opening more or less the flow rate of the inflowing can be seen on the drum housing Air and thus also the volume flow of the detached laundry items vary and so the different adhesiveness take into account the different types of laundry. With intermittent opening, you also have the option of the duration of the opening phase and the duration of the Vary closing phase. On the one hand, this means that Above all optimize the unloading process and that for the Minimize the energy consumption of the suction conveyor system and on the other hand ensure that not by one too large flow of laundry items the discharge opening of the Is clogged.

Characterized in that in the drying process according to claim 2 or in the loosening process according to claim 3 Completion of the drying process or the loosening process the working drum set to a speed which is higher than the speed for drying or the Is loosening up and at least so high that that of centrifugal force on the laundry items greater than that Gravity, the laundry can no longer from the wall of the working drum down into the interior of the Work drum fall in, as previously desired was the case. Instead, the clothes are put on the inside of the working drum. Therefore, the discharge opening of the drum housing can be opened without the laundry drops out prematurely. After this Connect the pipeline and switch on the suction conveyor arises within the working drum certain diffuse airflow. But this is not strong enough to counter the laundry items acting on them To release centrifugal force from the peripheral wall of the working drum, if their speed is only set sufficiently high. The latter is very important because after drying and loosening up the items of laundry anyway and are loosened up in themselves and thus an air flow offer a large target area. Only after opening the air inlet opening on the drum housing arises in their area a targeted air flow, the thrust of which is sufficient to Excess force between the centrifugal force and the gravitational pull to surpass and those in this area straight located laundry items from the peripheral wall of the working drum detach and then to the discharge opening to convey to and into the pipeline.

Characterized in that in the cleaning method according to claim 4 after completion of the cleaning process - and if necessary as part of an embodiment of the method Claim 5 after completion of an additional spin process - The working drum is set to a speed that is so high that that of her on the laundry centrifugal force is greater than gravity, put the laundry on the drum wall or remain on the drum wall. After connecting the pipeline and switching on the suction conveyor the discharge opening of the drum housing can be opened, without the laundry in the pipeline get and clog them and without liquid or vaporous portions of the laundry items Existing detergents get into the environment can. Only after opening the air inlet opening of the Air circulation system creates a targeted air flow in their area, whose thrust is sufficient to overcome the excess force between centrifugal force and gravitational pull and those currently in this area Detach items of laundry from the peripheral wall of the working drum and then to the unloading opening and into the Promote pipeline into it. That way they can items of laundry still contaminated with the cleaning agent environmentally friendly and without workload for the operating personnel pneumatically conveyed into a dryer whose larger void volume is better for the The drying process is suitable as the cleaning machine itself. This can turn faster than cleaning machine be used in the narrower sense of the word and thus be operated more efficiently.

By designing the method according to claim 6 reached with the first discharge speed that during the Opening the discharge opening of the drum housing and during of connecting the pipeline with the laundry items Security held on the peripheral wall of the working drum and will be at the second discharge speed achieved that the laundry items then only with one so slight excess of centrifugal force on the peripheral wall of the working drum that the after switching on the suction conveyor Air flow arising in the area of the air inlet opening in turn is sufficient to the laundry items in this Detach area from the working drum. When towards the end of the unloading process, the work drum additionally on a third discharge speed is set, the effect of centrifugal force is at most equal to the gravitational pull, then the last ones can still work in the drum loosen stuck laundry from her to avoid airflow to be conveyed away from the suction conveyor system.

By designing the method for drying laundry or to loosen up according to claim 7, secondary air flows avoided or at least diminished the main air flow for detaching the laundry items from the working drum and for Could have an adverse effect on conveying away.

By designing the method for cleaning after Claim 8 can also be the last in the working drum possibly stuck laundry detach from it to the air flow of the suction conveyor to be promoted.

Let by facilities according to claims 9 to 12 the method according to the assigned claims 1 to 4 run in an advantageous manner.

In a configuration of the devices according to claim 13 the thrust of the air flow acts at least approximately rectified with the gravitational pull. By design according to claim 14 it is achieved that of the Unloading items removed from the laundry first Air flow can be detected and replaced and so dead spaces with leftover laundry items can be avoided. By the approximately diagonally through the interior of the working drum running air flow, the laundry items are on shortest route to and through the discharge opening promoted. The swirling movements of the air flow ensure this and the items of laundry carried in it for the fact that also those outside the area of the air inlet opening and closer to the discharge opening on the inside wall of the working drum gradually detached laundry and be promoted with.

Through an embodiment according to claim 15, the unloading process largely mechanized and automated.

An embodiment according to claim 16 provides a very tight closing closure member for the discharge opening of the Drum housing and comes especially for spin dryers or washer extractors. An arrangement according to claim 17 requires only one for the closure member relatively small installation space and only a very small one small operating space. Such a design, the before especially for tumble dryers and loosening machines in Comes into consideration, it also allows the pipeline of the Suction conveyor system permanently connected to the unloading opening to let when the drum case and working drum on the other end has a loading opening.

An embodiment according to claim 18 makes it possible in addition to the discharge opening, which is due to the pipe connection of the suction conveyor for fluidic reasons only with one limited diameter can be equipped to create much larger loading opening through which Loading the machine concerned by hand easier and is light.

In an embodiment according to claim 19, both the cleaning machine as well as the one with a slide provided as a closure member of the unloading dryer or with the appropriately designed loosening machine accomplished that items of laundry that happened to be in the connecting line, which is inevitable for design reasons between the inside edge of the discharge opening and the Obtain closure organ, do not deposit there but can slide back into the working drum.

In an embodiment according to claim 20 or claim 21 can mechanize the opening and closing of the discharge opening and be automated. The same goes for one Design of the facilities according to claim 22 for the Connect and disconnect the pipeline of the suction conveyor.

An arrangement of the devices according to claim 23 enables it, also adjusting the speed of the working drum to automate the various operational needs.

An embodiment according to claim 24 allows against End of the unloading process, the working drum to an unloading speed adjust whose on the laundry acting centrifugal force at most equal to the gravitational pull is, so that may still be on the working drum clinging laundry items can detach from it to remove Air flow of the suction conveyor to be conveyed away.

With a configuration of the dryer or the loosening machine according to claim 25, the unloading Avoid or at least reduce the occurrence of false air.

By designing the facilities according to claim 26 can practically the entire workflow on the concerned Control setup fully automatically.

From GB 467,594 A a washing machine is known which in a perforated working drum in a drum housing having. At one end is a loading opening and on there is an unloading opening at the other end. When loading and when unloading, the other opening is closed. For unloading the dripping wet laundry from the with normal washing machine speed rotating drum serves either a compressed air flow or a suction air flow. In both cases, the air flows in the area of the Loading opening evenly distributed around the circumference in the drum housing one and through the perforations of a truncated cone End section of the working drum in this one and evenly distributed over the entire drum cross-section towards the unloading opening. For spin dry or Dried and loosened laundry items are this procedure and this device is not applicable.

Fig. 1

eine Vorderansicht einer Waschschleudermaschine;

Fig. 2

eine Seitenansicht der Waschschleudermaschine bei abgenommener Seitenwand;

Fig. 3

eine Draufsicht der Waschschleudermaschine bei abgenommenem Deckel;

Fig. 4

eine Vorderansicht der Waschschleudermaschine bei abgenommenen vorderen Stirnwänden;

Fig. 5

eine Seitenansicht der Waschschleudermaschine bei abgenommener Seitenwand mit angeschlossener Rohrleitung einer Saugförderanlage;

Fig. 6

eine Vorderansicht der Waschschleudermaschine bei abgenommenen vorderen Stirnwänden mit zum Teil angedeuteter Rohrleitung im Betriebszustand des Entladens;

Fig. 7

eine Draufsicht der Waschschleudermaschine bei abgenommenem Deckel im gleichen Betriebszustand wie bei Fig. 6;

Fig. 8

ein Seitenansicht der Waschschleudermaschine im gleichen Betriebszustand wie bei Fig. 6 und Fig. 7;

Fig. 9

eine Vorderansicht eines Wäschetrockners im Betriebszustand des Trocknens;

Fig. 10

eine Draufsicht des Wäschetrockners bei abgenommenem Deckel;

Fig. 11

eine Vorderansicht des Wäschetrockners bei abgenommenen vorderen Stirnwänden in einem Betriebszustad zwischen Trocknen und Entladen;

Fig. 12

eine Seitenansicht des Wäschetrockners bei abgenommener Seitenwand mit angeschlossener Rohrleitung einer Saugförderanlage;

Fig. 13

eine Vorderansicht des Wäschetrockners bei abgenommenden vorderen Stirnwänden im Betriebszustand des Entladens;

Fig. 14

eine Draufsicht des Wäschetrockners bei abgenommenem Oberteil im gleichen Betriebszustand wie bei Fig. 13.

Fig. 15

eine Vorderansicht einer Reinigungsmaschine;

Fig. 16

eine teilweise geschnitten dargestellte Seitenansicht der Reinigungsmaschine;

Fig. 17

eine Draufsicht der Reinigungsmaschine mit abgenommenem Deckel;

Fig. 18

eine teilweise geschnitten dargestellte Seitenansicht der Reinigungsmaschine mit angeschlossener Rohrleitung einer Saugförderanlage, vor Beginn des Entladevorganges;

Fig. 19

eine Seitenansicht wie Fig. 18 während des Entladevorganges.

The invention is explained in more detail below with reference to an embodiment of three processing machines each shown in the drawing. Show it:

Fig. 1

a front view of a washer-extractor;

Fig. 2

a side view of the washer-extractor with the side wall removed;

Fig. 3

a plan view of the washer-extractor with the cover removed;

Fig. 4

a front view of the washer-extractor with the front end walls removed;

Fig. 5

a side view of the washer extractor with the side wall removed with connected pipeline of a suction conveyor;

Fig. 6

a front view of the washer-extractor with removed front end walls with partially indicated pipeline in the operating state of unloading;

Fig. 7

a plan view of the washer-extractor with the cover removed in the same operating state as in Fig. 6;

Fig. 8

a side view of the washer extractor in the same operating state as in Fig. 6 and Fig. 7;

Fig. 9

a front view of a dryer in the operating state of drying;

Fig. 10

a plan view of the dryer with the cover removed;

Fig. 11

a front view of the dryer with the front end walls removed in an operating state between drying and unloading;

Fig. 12

a side view of the dryer with the side wall removed with connected pipeline of a suction conveyor;

Fig. 13

a front view of the dryer with removable front end walls in the operating state of unloading;

Fig. 14

a plan view of the dryer with the top removed in the same operating state as in Fig. 13th

Fig. 15

a front view of a cleaning machine;

Fig. 16

a partially sectioned side view of the cleaning machine;

Fig. 17

a plan view of the cleaning machine with the cover removed;

Fig. 18

a partially sectioned side view of the cleaning machine with connected pipeline of a suction conveyor, before the start of the unloading process;

Fig. 19

a side view like FIG. 18 during the unloading process.

The washer-extractor shown in FIGS. 1 to 3 20 has a perforated in a conventional manner Working drum 21, which is centered in a drum housing 22 housed and rotatable therein by means of a bearing block 23 is stored. The working drum is driven by a V-belt pulley 24 indicated. All of these parts are in housed a box-shaped machine housing 25.

The drum housing 22 has a front end circular loading and unloading opening, the following only briefly Discharge opening 26 is called. This discharge opening 26 will closed in the usual way by a swing door 27 and at the same time secured against water leakage.

As can be seen from FIG. 6, the drum housing 22 an air inlet opening 28, which by means of a closure member in the form of a flap 29 airtight and watertight is lockable. The air inlet opening 28 is in the arranged in the upper part of the drum housing 22 Direction of rotation of the working drum 21 before Apex line of the drum housing 22. In the axial direction the air inlet opening 28 extends over a length section of the drum housing, which is at least approximately at the rear end wall facing away from the discharge opening 26 31 of the working drum 21 begins and that in a predetermined Measure in front of the discharge opening 26 adjacent front end wall 32 of the working drum 21 ends (FIG. 2). In general, the axial extent of the closure flap 29 slightly larger than half the axial extent of the Drum housing 22.

The door 27 of the discharge opening 26 is with a locking device 33 coupled by means of which the door 27 can be locked and unlocked mechanically. The door 27 is also coupled to an actuator 34 by means of the door 27 mechanically in the closed position (Fig. 1) and in an open position (Fig. 4) can.

Similarly, the flap 29 is the air inlet opening 28 coupled to an actuating device 35, by means of which the closure flap 29 is closed and opened can be, this confirmation device 35 expediently is designed so that the closure flap 29th to different open positions with different Passage cross section can be adjusted. Depending on the type the actuator 35, it may be appropriate Closure flap 29 also with a locking device 36 to couple to ensure adequate tightness of the flap 29 to ensure.

For unloading, especially for fully automatic unloading, the washer extractor 20 is still a suction conveyor 37 present, of which in Fig. 5 to Fig. 8 only the end section of the associated pipeline 38 can be seen is. This will be at the discharge opening 26 in due course of the drum housing 22 connected. It is expedient a guide device (not shown) for this pipeline 38 by means of which they lead to the discharge opening 26 of the drum housing 22 and pressed against it can be and by means of the pipeline 38 again by the discharge opening 26 is returned to a rest position can be, in which the pipeline 38 is outside the Movement path of the door 27 is located. It is still advisable the pipe 38 with a likewise not shown Coupling actuator that leading and pressing the pipeline 38 against the discharge opening 26 and returning the pipeline 38 to it Mechanically at rest.

The washer-extractor 20 is equipped with a not shown Control equipped by means of which the drive of the Working drum 21 is turned on and off and in the individual operating levels set to a certain speed as will be explained in more detail below. Moreover the locking device 33 and the actuator 34 of the door 27 and the Actuator 35 and optionally the locking device 36 of the closure flap 29 of the air inlet opening 27 on and off and if necessary on certain positions set.

The washer extractor 20 is with the swing door open 27 loaded with laundry items. After closing the Swing door 27, the washer-extractor 20 is switched on. Your control ensures the automatic process of the entire washing and spinning program that was previously set has been.

In the following it is assumed that the finished washed and spun laundry in others Processing stations further processed or treated e.g. be dried in a tumble dryer, to be folded and stored later. To do this the laundry items from the washer-extractor 20 if possible be automatically unloaded and sent to the next one Processing station are promoted.

When spinning, the laundry items 39 (Fig. 4) through the centrifugal force acting on them on the peripheral wall of the Working drum 21 pressed and thereby also compressed, so that it is a relatively compact annulus form that more or depending on the type of laundry less strong on the perforated wall of the working drum 21 is liable. These items labeled with 39.1 also have a certain cohesion with each other.

The working drum is used to unload these items of laundry 39.1 21 by the control to a first discharge speed set lower than the spin speed is, but is still so high that on the laundry 39.1 acting centrifugal force by a predetermined amount is greater than the gravitational pull. Under the effect this excess force remain in the laundry items 39.1 Vertex of its orbit on the peripheral wall of the Work drum 21 stick.

In this operating state of the working drum 21, the Swing door 27 opened (Fig. 4). As a result of the sufficient The items of laundry 39.1 remain in the circular ring assembly at high centrifugal force and do not fall out of the now open discharge opening 26 out.

The pipeline 38 of the suction conveyor system 37 is by means of their (not shown) guide device and Actuating device brought up to the discharge opening 26 and pressed on the edge (Fig. 5). If the suction conveyor 37 is put into operation by either is switched on or by already operating Suction conveyor a shut-off device in the pipeline 38 is opened, arises at the discharge opening 26 Vacuum. The shutter 29 is controlled by the control the air inlet opening 28 of the drum housing 22 opened (Fig. 6). This happens either intermittently or constantly, the shutter 29 on a more or smaller air inlet cross-section can be set, which can also be varied. As a result of the Suction conveyor system 37 generated in the work drum 21 Vacuum air flows from the environment through the air inlet opening 28 in the drum housing 22 and further through the Perforations of the working drum 21 in the interior into it, as indicated by the arrow 41 in FIG. 6. in the An air flow arises in the area of the air inlet opening 28, whose thrust is so great that it is the excess force between the centrifugal force and the gravitational pull and thereby surpasses that in the area of the air inlet opening 28 laundry items 39.2 from the wall of the Work drum 21 detaches and thus from the annular Detach the bond of the laundry items 39.1 attached to it and promotes to the discharge opening 26 and then in feeds the pipeline 38 in, as in FIGS. 6 to 8 is indicated by the arrows 42 and 43.

When detaching the laundry items 39.2 in the area of the air inlet opening 28 and on their way to the discharge opening 26, at least partially strip the detached laundry items also closer to that in the same meridian plane front end wall 32 of the working drum 21 at the Detach items of laundry along the circumferential wall and loosen them this also from the working drum. This deadweight is further favored by the fact that the laundry items 39.1 at least in their circular connection partially overlap each other and the detached laundry 39.2 therefore those that are attached to them or with them more or less tangled neighboring laundry items at least loosen up. It is therefore very important that the Control the first unloading speed and the strength of the through the air inlet opening 28 flowing air flow so one another votes. that the amount of detached at the same time Items of laundry do not become so large that the discharge opening 26 is clogged. The vote should also be such that the detachment and removal of the laundry not too long lasts and thereby, in particular through the suction conveyor system, unnecessarily much energy is consumed and unnecessarily much time passes until the unloading process and thus also the Funding process has ended.

When on the front length section of the working drum 21 adjacent laundry items 39.1 through the already detached and passing laundry items 39.2 not sufficiently loosened and finally detached and carried away become what strongly depends on the type of laundry depends, then it is appropriate to counter the work drum 21 End of the discharge process to a second discharge speed adjust the centrifugal force on the laundry items 39.1 causes the same at most, better even a little smaller than gravity is. Then peeling this off Laundry items 39.1 by at least in the area of Then the predominant gravitational force relieved, so that these laundry items are unloaded can.

The clothes dryer 50 shown in FIGS. 9 to 13 has a perforated working drum in a conventional manner 51, which is housed in a drum housing 52 is and rotatable therein by means of a bearing block 53 (Fig. 10) is stored. The drive of the working drum 51 is through a V-belt pulley 54 indicated. All of these parts are housed in a box-shaped machine housing 55.

The drum housing 52 has a front end circular loading and unloading opening, the following only briefly is referred to as discharge opening 56. This discharge opening 56 is in the usual way through a swing door 57 closed, which is pivotally mounted on the machine housing 55 is.

Similar to the washer-extractor 20, this shows Drum housing 52 has an air inlet opening 58 (FIG. 13), by means of a closure member in the form of a closure flap 59 is lockable. The air inlet opening 58 is basically arranged in the same way as the air inlet opening 28 of the washer-extractor 20, so that on the explanation of which is referred to. Regardless of the air inlet opening 28 are still more on the drum housing 52 Entry and exit openings as well as outside the Drum housing 52 also air duct for the drying air available, e.g. the air inlet duct 61 through which Fresh air can be drawn in from the environment then passed through a heater 62 and is heated in it before it passes through a large air inlet 63 passed into the interior of the drum housing 52 becomes. From there it can pass through the perforated peripheral wall of the working drum 51 flow into the interior thereof. in the Air inlet channel 61 is a closure member in the form of a Closure flap 64 is present, by means of which the air inlet duct 61 can be closed if necessary. The shutter 64 is with an actuator, not shown coupled.

The remaining parts for the circulation of the drying air are of a conventional kind. You will not get closer here explained.

The swing door 57 of the unloading opening 56 is provided with a locking device 65 coupled by means of which the door 57 can be locked and unlocked mechanically. The door 57 is also coupled to an actuator 66 by means of the door 57 mechanically in the closed position (Fig. 9) and be brought into an open position (Fig. 11) can.

Similarly, the shutter 59 is the air inlet opening 58 coupled to an actuating device 67, by means of which the closure flap 59 is closed and opened can be, with the actuating device 67 is designed so that the shutter 59 on different Open positions with different passage cross-sections can be adjusted.

For unloading, especially for fully automatic unloading, the dryer 50 is still a suction conveyor 68 is present, of which only the one in FIGS. 12 to 13 End section of the associated pipeline 69 can be seen. This is in due time to the discharge opening 56 of the Drum housing 51 connected, assuming is that this pipeline 69 in the same or at least similarly with a guide device and a Actuator is provided as related was explained with the washer-extractor 20.

The clothes dryer 50 is also provided with a control, which is not shown in FIGS. 9 to 14 and which in partly the same and partly similar to that Control device of the washer-extractor 20 acts.

The tumble dryer 50 is with the swing door 57 open Load items of laundry 39. After closing the swing door 57, the clothes dryer 50 is switched on. His Control ensures that the entire process runs automatically Drying program that was previously set.

During the drying process, the items of laundry 39 circulated in the working drum 51 and through the sweeping Drying air dried. They will too loosened up and largely isolated. When drying is the working speed of the working drum 51 so low that at least towards the end of the drying process and isolated items of laundry 39 from the wall the working drum 51 can solve and by the Drying air flows through the interior of the work drum 51 can fall down if they are attached to the Inside of the work drum 51 to a certain extent in the Have been raised. This will fill the loosened up and isolated items of laundry 39 practically the entire Interior of the working drum 51, as in FIG. 9 is shown.

The work drum is used to unload these items of laundry 39 51 by the control to a first unloading speed set higher than the working speed at Drying is. This first discharge speed is so high that the centrifugal force acting on the items of laundry 39 through them a predeterminable dimension is greater than the gravitational force and thereby the previously freely movable items of laundry 39 themselves now in a loose circular composite, as Laundry items 39.1 on the peripheral wall of the working drum 51 create, as shown in Fig. 11.

In this operating state of the dryer 50 is the Swing door 57 open (Fig. 11). As a result of the sufficient The items of laundry 39.1 remain in the circular ring assembly at high centrifugal force and do not fall out of the now open discharge opening out.

The pipeline 69 of the suction conveyor system 68 is by means of their (not shown) guide device and Actuator led to the discharge opening 56 and pressed to its edge (Fig. 12). The drying process serving air inlet and outlet openings are closed, as is the case with the flap 64 is shown in the air inlet duct 61 (Fig. 11).

Before or after starting up the suction conveyor 68 the working drum 51 is expediently on a second Discharge speed set at which the excess force Centrifugal force less than the gravitational force of the earth the first discharge speed, but which is still so high that when opening the flap 59 on the Air inlet opening 58, the items 39.1 not in larger Quantity detached from the peripheral wall of the work drum 51 and are conveyed to the discharge opening 56 and block them. Otherwise, refer to the explanations of the unloading process referred to the washer extractor 20. The also includes an indication that it may be appropriate towards the end of the unloading process, the working drum 51 to set a further, a third, discharge speed at the centrifugal force is less than the gravitational force to also detach the last items of laundry 39 and convey them away.

A loosening machine is used to remove the press cake Loosening up laundry in a laundry press pressed and thereby by a large part of the wash water have been exempted so that they can then be processed further can be. Such loosening machines are largely trained the same or similar to a tumble dryer except that the one circulated in the loosening machine Air is not heated and therefore only essential less drying effect occurs. That being said the loosening machine as the previously described tumble dryer operated and unloaded so that in so far on the previous explanations regarding the tumble dryer 50 can be referenced.

With tumble dryers and loosening machines, different from a centrifugal machine or a washer-extractor not on a waterproof training of the Drum housing. Therefore, it is used as a closure organ for Unloading opening does not necessarily require a swing door that a good one over the usual compliant rubber sleeve Sealing of the drum housing results. With a clothes dryer or a loosening machine can therefore as Closing member of the discharge opening also uses a slide be that of not necessarily without special measures is waterproof. The valve body is then general with the machine housing or with the drum housing connected. This also gives rise to the possibility that Pipeline of the suction conveyor system with the valve housing to connect constantly when the clothes dryer or the loosening machine its own on the other end Has loading opening because the working drum is not by means of a central bearing block but by means of Scope of bearing points is rotatably mounted.

The cleaning machine shown in FIGS. 15 to 19 70 serves to wash items in a cleaning liquid to wash'. Because these cleaning fluids, hereinafter referred to as cleaning agents are generally harmful to health and the environment the cleaning machine must be during the cleaning process be completely closed like that at a washer-extractor is the case. After completion of the cleaning process contain the laundry items still a relatively large amount of the detergent. Unloading these laundry items from the cleaning machine must therefore be compared to the unloading process can be modified in a washer extractor. Accordingly the cleaning machine itself is also opposite a washer extractor, e.g. opposite the washer-extractor 20, partially modified.

In accordance with the washer-extractor 20 points the cleaning machine 70 has a perforated working drum 71 on, housed in the middle of a drum housing 72 and is rotatably supported therein by means of the pedestal 73. The The work drum 73 is driven by the V-belt pulley 74 illustrates. All of these parts are in one box-shaped machine housing 75 housed.

The drum housing 72 has one on its front face circular loading opening 76. This is like the washer-extractor 20, closed by a swing door 77 and at the same time sealed against leakage of the cleaning agent. Unlike in the washer-extractor 20 the cleaning machine 70 has a separate discharge opening 78 on the middle of the swing door 77 on this is arranged. This discharge opening 78 is by means of a Slider 79 closed and opened. The slider 79 as The whole is and is always connected to the swing door 77 together with it pivoted away from the drum housing 72, when the loading opening 76 is opened to the cleaning machine 70 loaded with laundry.

Since the swing door 77 with its central part in the loading opening 76 of the drum housing 72 protrudes and only continues is also on the back of the rubber sleeve the discharge opening 78 behind the loading opening 76. As opposed to this the slider 79 because of its design larger dimensions only in front of the swing door and in front End wall of the machine housing 75 may be arranged can, is between the inner edge 81 of the discharge opening 78 and a slide pipe 82 is inserted into the slider 79. That connects the slide housing 83 of the slide 79 in which the slide body 84 between a closed position (Fig. 16 and Fig. 18) and an open position (Fig. 19) is guided. On the outside of the valve body 83 is followed by a short pipe socket 85 to which the pipe 86 of the suction conveyor 87 is connected (Fig. 18).

The slider body 84 is a coupling rod 88 from an actuator 89 operated as a double-acting pneumatic or hydraulic piston drive is trained. But it can also be designed as a spindle drive his.

As with the washer-extractor 20, the cleaning machine 70 the drum housing 72 has an air inlet opening 91, which are closed by means of a flap 92 and can be opened. The shutter 92 is operated by an actuator 93 and by means of a locking device 94 in the closed Condition additionally locked.

The connecting line 82 between the inner edge 81 of the discharge opening 78 and the slide 79 rises from the inner edge 81 from a certain pitch angle up to the slide 79 towards. This has the connecting line 82 to the work drum 71 a slope through which it is achieved that Items of laundry that happen at the rotation of the work drum fall out of it into the connecting line 82, automatically slide back into the working drum, so that they are from the circulation of the laundry in the Working drum 71 are not excluded. The outside Pipe socket 85 has the same slope as that Connection line 82. The pipe socket 85 could also be level.

The discharge opening 78 of the cleaning machine 70 is at the Pipeline 86 adapted to suction conveyor 87. If those Unloading opening 78 also for loading the cleaning machine should be sufficiently large, it can be opened on the swing door 77 to be dispensed with, only because of what is possible through them Enlargement of the loading opening to facilitate the loading process is used. Then the connecting line 82 directly connected to the drum housing 72 become. The discharge opening 78 then forms at the same time the loading opening of the drum housing and the slider 79 their closure organ. In this case, they are also simplified the control lines and the connecting lines for the Operating means of the actuating device 89.

In the slide housing 83 is in the tear area of the in Closed position slide body 84 on the outside side a pressure device, not shown arranged which the slide body 84 in the Closed position against an annular contact surface of the Slider housing 83 presses with a sealing element is provided. This is the slide 79 during the Operation of the cleaning system 70 reliably tight.

After the cleaning process is complete, it will be in the drum housing 72 free detergents removed. The are in the drum 71 laundry but still soaked with detergent. The one that remained Amount of detergent depends on the type of Laundry items. To the remaining in the laundry Decreasing the amount of detergent is generally a spin cycle connected, in which the Spin speed, however, is usually lower than that Spin speed in a washer-extractor. But even after such a spin cycle contain the Items of laundry still have a residual amount of detergent. That is why these laundry items have to be in one closed system are treated, in particular 'dried' to completely remove the detergent remove, so that the items of laundry can then be handled freely can be. This 'drying' of the laundry items takes place expediently in a dryer which is used for the drying process is more suitable than the cleaning machine 70.

For this purpose, the working drum 71 is placed on a first one Unloading speed set on the laundry items Centrifugal force causes greater than the gravitational force is. With the slide 79 still closed, the Pipe 86 of the suction conveyor system 77 on the pipe socket 85 tightly connected (Fig. 18). The suction conveyor 87 will put into operation with the slide 79 closed. Thereby arises on the outside of the slide body 84 Vacuum. The pressing device of the slide body is switched off. As a result, the slide body 84 of his Lifted contact surface on slide housing 83. The Slider 79 is operated by means of the actuating device 79 open. As a result, the existing ones in the working drum 71 Vapors of the detergent at least in part aspirated and later in a condenser and / or in one Adsorption filter caught.

When the shutter 92 of the inlet opening 91 opens is created, an air flow that the laundry in Area of the inlet opening 91 from the peripheral wall of the Work drum 71 detaches and it through the discharge opening 78th conveyed into the pipeline 86. From there they are fed into a dryer that is similar is closed to the outside like the cleaning machine 70. The laundry is 'dried' in this dryer, i.e. they are completely from the detergent exempt, which then also in the above devices is caught.

If the dryer downstream of the cleaning machine 70 similar to how the dryer 50 is formed, can unload the laundry items from it fully automatically and will be fed to other stations.

Reference list

20th

Washer extractor

21

Working drum

22

Drum housing

23

Bearing blocks

24th

V-belt pulley

25th

Machine housing

26

Discharge opening

27

Swing door

28

Air inlet opening

29

Flap

31

(rear) end wall

32

(front) end wall

33

Locking device

34

Actuator

35

Actuator

36

Locking device

37

Suction conveyor system

38

Pipeline

39

Laundry items

41

Arrows

42

Arrows

43

Arrows

50

Tumble dryer

51

Working drum

52

Drum housing

53

Bearing block

54

V-belt pulley

55

Machine housing

56

Discharge opening

57

Swing door

58

Air inlet opening

59

Flap

61

Air intake duct

62

heater

63

Air inlet opening

64

Flap

65

Locking device

66

Actuator

67

Actuator

68

Suction conveyor system

69

Pipeline

70

Cleaning machine

71

Working drum

72

Drum housing

73

Bearing block

74

V-belt pulley

75

Machine housing

76

Loading opening

77

Swing door

78

Discharge opening

79

Slider

81

Inside edge

82

Connecting pipe

83

Valve housing

84

Valve body

85

Pipe socket

86

Pipeline

87

Suction conveyor system

88

Coupling rod

89

Actuator

91

Air inlet opening

92

Flap

93

Actuator

94

Locking device

Claims (26)

1. A method of unloading items of washing (39) from a spin drier or spinner-washer (20) comprising a perforated operating drum (21) and a drum housing (22) having an end unloading opening (26) closable by means of a door (27),
   characterised by the following method steps:

   on completion of the spinning process, the operating drum (21) is set to a speed

   which is lower than the spin speed and

   which is nevertheless high enough for the centrifugal force acting on the items of washing (39.1) to be greater than the gravitational force by a predeterminable amount,

   the door (27) of the drum housing (22) is opened,

   the pipe (38) of a suction conveyor (37) is connected to the unloading opening (26) of the drum housing (22),

   the suction conveyor (37) is set into operation,

   the closing member (29) of an air inlet opening (28) arranged on the circumferential wall of the drum housing (22) is opened intermittently or continuously to a greater or lesser extent.
2. A method of unloading items of washing (39) from a drier (50) comprising a perforated operating drum (51) and a drum housing (52) having an end unloading opening (56) closable by means of a closing member (57),
   characterised by the following method steps:

   on completion of the drying process, the operating drum (51) is set to a speed

   which is higher than the drying speed and

   which is at least high enough for the centrifugal force acting on the items of washing (39.1) to be greater than the gravitational force by a predeterminable amount,

   the closing member (57) of the unloading opening (56) of the drum housing (52) is opened,

   the pipe (69) of a suction conveyor (68) is connected to the unloading opening (56) of the drum housing (22 [sic - 52]),

   the suction conveyor (68) is set into operation,

   the closing member (57) of an air inlet opening (58) arranged on the circumferential wall of the drum housing (52) is opened intermittently or continuously to a greater or lesser extent.
3. A method of unloading items of washing (39) from a loosening machine for loosening compacted items of washing, comprising a perforated operating drum (51) and a drum housing (52) having an end unloading opening (56) closable by means of a closing member (57),
   characterised by the following method steps:

   on completion of the loosening process, the operating drum (51) is set to a speed

   which is higher than the loosening speed and

   which is at least high enough for the centrifugal force acting on the items of washing (39.1) to be greater than the gravitational force by a predeterminable amount,

   the closing member (57) of the unloading opening (56) of the drum housing (52) is opened,

   the pipe (69) of a suction conveyor (68) is connected to the unloading opening (56) of the drum housing (52),

   the suction conveyor (68) is set into operation,

   the closing member (59) of an air inlet opening (58) arranged on the circumferential wall of the drum housing (52) is opened intermittently or continuously to a greater or lesser extent.
4. A method of unloading items of washing (39) from a cleaning machine (70) comprising a perforated operating drum (71) and a drum housing (72) having an end unloading opening (78) closable by means of a closing member (79),
   characterised by the following method steps:

   on completion of the cleaning process, the operating drum (71) is set to a speed which is high enough for the centrifugal force acting on the items of washing (39.1) to be greater than the gravitational force by a predeterminable amount,

   the pipe (86) of a suction conveyor (87) is connected to the unloading opening (78) of the drum housing (72),

   the suction conveyor (87) is set into operation,

   the closing member (79) of the unloading opening (78) of the drum housing (72) is opened,

   the closing member (92) of an air inlet opening (91) arranged on the circumferential wall of the drum housing (72) is opened intermittently or continuously to a greater or lesser extent.
5. A method according to claim 4, characterised by the following method step:

   on completion of the cleaning process, the operating drum (71) is set to a second operating speed which, as a spin speed, serves to spin the items of washing.
6. A method according to any one of claims 1 to 3, characterised by the following method steps:

   on completion of the principal working process (spinning, drying, loosening), the operating drum is set to two different speeds, namely

   a first unloading speed from a time before the closing member (57) of the unloading opening (56) of the drum housing (52) is opened until after the connection of the pipe (69) of the suction conveyor (68), and

   a second unloading speed from after the connection of the pipe (69) of the suction conveyor (68) until after the items of washing have been unloaded,

   in the case of the first unloading speed, the amount by which the centrifugal force acting on the items of washing is greater than the gravitational force is higher than in the case of the second unloading speed,

   preferably, towards the end of the unloading process, the operating drum (51) is set to a third unloading speed which exerts on the items of washing a centrifugal force which is at most equal to the gravitational force.
7. A method according to claim 2 or 3, characterised by the following method step:

   at least some of the air inlet lines (61) and/or air outlet lines, which are open during drying or loosening, are closed before the suction conveyor (68) is switched on.
8. A method according to claim 4 or 5, characterised by the following method step:

   towards the end of the unloading process, the operating drum (71) is set to a second unloading speed which exerts on the items of washing (39.1) a centrifugal force which is at most equal to the gravitational force.
9. Apparatus for carrying out the method according to claim 1, having the following features:

   a spin drier or spinner-washer (20) is provided which comprises a perforated operating drum (21) and a drum housing (22) having an end unloading opening (26) closable by means of a closing member (27),

   characterised by the following features:

   the drum housing (22) has an air inlet opening (28) on its circumferential wall,

   a closing member (29) is provided, by means of which the air inlet opening (28) of the drum housing (22) is openable and closable in an air-tight and water-tight manner,

   a pipe (38) is provided

   which is connectable at one end to a suction conveyor (37) and

   which is connectable at the other end to the unloading opening (26) of the drum housing (22),

   a control mechanism for the drive (24) of the operating drum (21) is provided, by means of which the operating drum (21) can be set to at least two speeds,

   of which the first speed, as an operating speed, serves to spin the items of washing, and

   of which the second speed, as an unloading speed, exerts on the items of washing (39.1) a centrifugal force which is greater than the gravitational acceleration force by a predeterminable amount.
10. Apparatus for carrying out the method according to claim 2, having the following features:

    a drier (50) is provided which comprises a perforated operating drum (51) and a drum housing (52) having an end unloading opening (56) closable by means of a closing member (57),

    characterised by the following features:

    the drum housing (52) has an air inlet opening (58) on its circumferential wall,

    a closing member (59) is provided, by means of which the air inlet opening (58) of the drum housing (52) is openable and closable,

    a pipe (69) is provided

    which is connectable at one end to a suction conveyor (68) and

    which is connectable at the other end to the unloading opening (56) of the drum housing (52),

    a control mechanism for the drive (54) of the operating drum (51) is provided, by means of which the operating drum (51) can be set to at least two speeds,

    of which the first speed, as an operating speed, serves to dry the items of washing, and

    of which the second speed, as an unloading speed, exerts on the items of washing (39.1) a centrifugal force which is greater than the gravitational force by a predeterminable amount.
11. Apparatus for carrying out the method according to claim 3, having the following features:

    a loosening machine is provided which comprises a perforated operating drum (51) and a drum housing (52) having an end unloading opening (56) closable by means of a closing member (57),

    characterised by the following features:

    the drum housing (52) has an air inlet opening (58) on its circumferential wall,

    a closing member (59) is provided, by means of which the air inlet opening (58) of the drum housing (52) is openable and closable,

    a pipe (68 [sic - 69]) is provided

    which is connectable at one end to a suction conveyor (67) and

    which is connectable at the other end to the unloading opening (56) of the drum housing (52),

    a control mechanism for the drive (54) of the operating drum (51) is provided, by means of which the operating drum (51) can be set to at least two speeds,

    of which the first speed, as an operating speed, serves to loosen the items of washing, and

    of which the second speed, as an unloading speed, exerts on the items of washing (39.1) a centrifugal force which is greater than the gravitational acceleration force by a predeterminable amount.
12. Apparatus for carrying out the method according to claim 4, having the following features:

    a cleaning machine (70) is provided which comprises a perforated operating drum (71) and a drum housing (72) having an end unloading opening (78) closable by means of a closing member (79),

    characterised by the following features:

    the drum housing (72) has an air inlet opening (91) on its circumferential wall,

    a closing member (92) is provided, by means of which the air inlet opening (91) of the drum housing (72) is openable and closable in a gas-tight and liquid-tight manner,

    a pipe (86) is provided

    which is connectable at one end to a suction conveyor (87) and

    which is connectable at the other end to the unloading opening (78) of the drum housing (72),

    a control mechanism for the drive (74) of the operating drum (71) is provided, by means of which the operating drum (71) can be set to at least two speeds,

    of which the first speed, as an operating speed, serves to clean the items of washing, and

    of which the second speed, as an unloading speed, exerts on the items of washing (39.1) a centrifugal force which is greater than the gravitational acceleration force by a predeterminable amount.
13. Apparatus according to any one of claims 9 to 12, characterised by the following features:

    the air inlet opening (26 [sic - 28]) is arranged in the upper half of the drum housing (22),

    preferably, the air inlet opening (26 [sic - 28]) is arranged at least partially, preferably entirely upstream of the apex line of the drum housing (22) in the direction of rotation of the operating drum (21).
14. Apparatus according to any one of claims 9 to 13, characterised by the following features:

    the air inlet opening (28) extends axially over a longitudinal portion of the drum housing (22),

    which starts at least in proximity to the end wall (31) of the operating drum (21) remote from the unloading opening (26) and

    which preferably ends a predetermined distance upstream of the end wall (32) of the operating drum (21) adjacent to the unloading opening (26).
15. Apparatus according to any one of claims 9 to 14, characterised by the following features:

    the closing member (29) for the air inlet opening (28) on the drum housing (22) is connected to an actuating device (35), by means of which the closing member (29) is adjustable between a closed position and an open position,

    the actuating device (35) is preferably formed so that the closing member (29) is adjustable to different admission widths.
16. Apparatus according to any one of claims 9 to 11, characterised by the following feature:

    the closing member for the end unloading opening (26) of the drum housing (22) is formed as a hinged door (27).
17. Apparatus according to claim 10 or 12, characterised by the following feature:

    the closing member for the end unloading opening (78) of the drum housing (72) is formed as a slider (79).
18. Apparatus according to claim 12, characterised by the following features:

    the drum housing (72) has a loading opening (76) closable by means of a closing member (77),

    the closing member of the loading opening (76) is formed as a hinged door (77),

    the hinged door (77) comprises the unloading opening (78),

    the closing member of the unloading opening (78) is formed as a slider (79), the slider housing (83) of which

    is either arranged directly on the hinged door

    or is arranged indirectly on a pipe connection (85) adjoining the unloading opening (78) in the hinged door (77).
19. Apparatus according to claim 12, 17 or 18, characterised by the following features:

    where a pipe connection (85) is provided between the inner edge (81) of the unloading opening (79 [sic - 78]) and its closing member (79), at least the lower wall region of the pipe connection, preferably the entire pipe connection (85), rises from the inner edge (81) of the unloading opening (79 [sic - 78]) towards the closing member (79) at a predetermined angle of inclination.
20. Apparatus according to claim 16, characterised by the following features:

    the door (27) of the unloading opening (26) is connected to a locking device (33), by means of which the door (27) is lockable and unlockable,

    the door (27) of the unloading opening (26) is connected to an actuating device (34), by means of which the door (27) is adjustable between a closed position and an open position.
21. Apparatus according to claim 17 or 18, characterised by the following feature:

    the slider (79) is connected to an actuating device (89), by means of which the slider (79) is adjustable between a closed position and an open position.
22. Apparatus according to any one of claims 9 to 21, characterised by the following features:

    a guide device for the pipe (38) is provided at least on the end portion facing the unloading opening (26), by means of which the end of the pipe (38) is movable towards the unloading opening (26) and is movable away into a rest position located outside the path of movement of the door (27) of the unloading opening (26),

    an actuating device is provided,

    by means of which the end of the pipe (38) is movable towards the unloading opening (26) and is preferably pressable thereagainst, and

    by means of which the pipe (38) is movable into its rest position.
23. Apparatus according to any one of claims 9 to 11, characterised by the following feature:

    the control mechanism for the drive (24) of the operating drum (21) is formed so that the speed of the operating drum (21) can be set to the operating speed and to two different unloading speeds, the amount by which the centrifugal force exerted on the items of washing (39.1) is greater than the gravitational force being higher in the case of the first unloading speed than in the case of the second unloading speed.
24. Apparatus according to any one of claims 9 to 12 or claim 23, characterised by the following feature:

    the control mechanism is formed so that, at the end of the unloading process, the operating drum (21) is adjustable to a further unloading speed which exerts on the items of washing a centrifugal force which is at most equal to the gravitational force.
25. Apparatus according to claim 10 or 11, characterised by the following feature:

    at least one blocking member (64) is provided in the air inlet line (61) and/or air outlet line for the principle working process,

    the blocking member (64) is preferably connected to an actuating device.
26. Apparatus according to any one of claims 15 to 25, characterised by the following feature:

    the control mechanism is formed so that, where provided, the actuating device (35) of the closing member (29) of the air inlet opening (28) and/or the locking device (33) and the actuating device (34) for the door (27) or the slider of the unloading opening (26) and/or the actuating device for the pipe (38) and/or the actuating device for the blocking member (64) in the air inlet line (61) and/or the air outlet opening are switchable on and off.

Images