Laundry treatment unit with process air generator

Abstract

The invention relates to a laundry treatment device (1) with the following features: - a housing (2); - a cylindrical tub (4); - a cylindrical drum (3) rotatably mounted in the tub (4) with a horizontal or inclined axis (33), designed to hold laundry; - a fan module (13) mounted in the housing (2) above the tub (4); - a fan (9) for conveying process air (PL) through the channel section (8); - a filter element (100) provided in the channel section (8a) or in the second pipe (96), preferably in the area of ​​the channel inlet. The laundry treatment device comprises a filter element (100) designed as a flat body made of filter medium and arranged obliquely at an angle of 5° to 45°, preferably 7° to 30°, in the direction of flow of the channel section (8a).

Description

The invention relates to a laundry treatment appliance having the following features:a housing;a cylindrical tub;a cylindrical drum rotatably mounted in the tub with a horizontal or inclined axis and configured to receive laundry;wherein the drum has openings or perforations in its front rear wall to permit a flow of air from the tub through the drum;wherein the tub has an air inlet and an air outlet;a supply device for introducing washing liquid into the tub;a draining device for draining the washing liquid from the tub;a process air module which is mounted in the housing above the tub, comprisinga module housing comprising a channel portion,a fan for generating process air through the duct portion and the drum;a first tube for connecting the channel section to the air inlet of the tub and a second tube for connecting the channel section to the air outlet of the tub and a filter element arranged in the channel section or in the second tube;a control device which is configured and programmed to activate and deactivate the actuators, i.e. the motor for rotating the drum, the inflow device and the outflow device, in order to carry out a treatment program.EP 2 843 103 A1 discloses a washer-dryer with a heat pump module for generating the dryer air. The heat pump module is located above the tub and includes a blower for generating a process air flow that flows through the drum for drying the laundry items located in the drum. The heat pump module comprises in the channel section at the air inlet to the module a filter element which consists of two screens which are arranged transversely to the flow direction or parallel to the cross section of the channel section.The object of the invention is to provide a compact laundry treatment machine with a wash tub and process air generator with an improved filter for cleaning the process air.According to the invention, this object is achieved inter alia by a laundry treatment appliance having the features of claim 1. Advantageous embodiments and further developments of the invention are evident from the dependent claims.The approach presented here provides a compact laundry treatment appliance in a simple manner, which is equipped with a process air generator for generating the process air. In a so-called standard housing, process air generators are accommodated in addition to the components for washing. This is accomplished in such a way that the process air module is placed in the free space above and to the side of the tub. The channel section is formed as a flat, wide box, in which the heat exchangers are preferably accommodated in suitable dimensions. Preferably, furthermore, in the tub, the air inlet is arranged in the rear end wall in the lower region and wherein in or on the tub, the air outlet is arranged in the front, middle, upper region of the front end wall. The air outlet can also be introduced into a bellows which forms a tubular connecting channel from the loading opening in the front wall to the front-side loading opening in the drum or the suds container. The bellows can therefore be assigned to the suds container with respect to the process air guidance. The flat box forming the duct section is located between the air inlet and the air outlet and is aligned approximately horizontally, that is to say the broad sides are aligned horizontally and the narrow sides are aligned approximately vertically. All position and direction information relate overall to the operationally installed position of the device.Furthermore, the process air module or the feed pipe comprises a filter element which is provided in the channel section upstream of the box-shaped channel section or in the channel section in the flow direction. The filter element is removably placed in the front part of said channel portion. The filter element serves to free the process air from lint before it reaches the channel section with the heat exchangers preferably located therein. In order that the filter element or the filter means of the filter element can be cleaned, it is positioned or arranged in a removable manner in the channel section or in the tube section in front of the channel section. The filter element can be removed from the channel section or the tube through a housing opening and inserted or accessed. The filter medium introduced into the filter element, for example a fleece mat, gauze or screen, can then be freed from lint or adhesions. According to the invention, the filter element is designed as a flat body made of a filter means and is arranged obliquely at an angle in the range from 5° to 45°, preferably 7° to 30°, particularly preferably 7° to 20°, in the direction of extension in the flow direction of the channel section.The control device is configured or programmed in such a way that the process air generator or fan is activated when a drying program is started. The fan is activated for a predetermined period of time so that the moist laundry is exposed to an air flow of the process air. Lint is thereby released from the textile of the laundry items and transported to the channel or channel section. The filter element placed in front of said channel section separates the lint and particles present in the process air flow.In an expedient embodiment, the channel section in which the filter element is accommodated is designed as a flat hollow body having a height in the range from 2 cm to 8 cm and a width in the range from 5 cm to 35 cm, preferably 7 cm to 25 cm, particularly preferably 10 cm to 20 cm, wherein the filter element is shaped as a flat, flat body and is arranged obliquely in the channel section. The filter element is arranged in the channel section inclined or obliquely with the aforementioned angle and rests with one broad side against the underside and in the front region of the channel section and with the opposite broad side against the upper side in the rear region of the channel section. The details of the front region and the rear region relate to the flow direction of the process air stream through the duct section, wherein the front region defines the inflow region into said duct section. The filter element can alternatively be inserted in the channel section in such a way that it rests with one broad side against the upper side and in the front region of the channel section and with the opposite broad side against the lower side in the rear region of the channel section. For all embodiments, the filter element is sealingly positioned with its circumferential edge in said channel section so that no lint from process air flowing by side passes the filter element.All position and direction information relate overall to the position of the laundry treatment appliance in operation.In another embodiment, the channel section is designed as a flat hollow body with a height in the range from 2 cm to 8 cm and a width in the range from 5 cm to 35 cm, preferably 7 cm to 25 cm, particularly preferably 10 cm to 20 cm, wherein the filter element is furthermore formed bent, so that the filter element is formed in a V-shape with an acute angle. The filter element can thus be provided with the same size filter surface at half the longitudinal extent as in the case of a flat filter element. With the shorter embodiment, as the V-shaped element offers, the channel section can also be kept correspondingly short, so that overall a compact arrangement of the unit is possible.In an expedient development, the filter element is inserted or accommodated in the accommodation channel in such a way that the tip of the Vs is located behind the V opening in the flow direction. This results in a pocket into which the dust or lint is collected.In another embodiment, the filter element is inserted or accommodated in the accommodation channel in such a way that the tip of the Vs is located upstream of the V opening in the flow direction. Here, the pocket is inserted into the channel such that the lint adheres to the outside.In an overall advantageous embodiment, the laundry treatment appliance comprises a box-shaped receiving housing in which the filter element is inserted, wherein the receiving housing with the filter element is inserted displaceably into the pipe section. The receiving housing is inserted into the channel in such a way that it can be removed from the channel section together with the filter element in order to free it from lint or clean it. The filter element can preferably be inserted in a detachable manner in the receiving housing. In an embodiment of the laundry treatment appliance as a washer-dryer, it can comprise a laundry detergent dispenser drawer having a grip plate which is designed as a partial region of the panel when the laundry detergent dispenser drawer is inserted, wherein the access opening for the filter element or the cover plate of the filter element is arranged laterally with respect to the grip plate for the laundry detergent dispenser drawer.In a further embodiment which is expedient overall, the filter element is constructed in multiple layers, having at least one support layer, a fine filter layer which is applied to the support layer and is made of nonwoven or open-pored foam material or a multiple-layer woven fabric, and a layer which is applied to the fine filter layer and is made of gauze or mesh-like woven fabric.In an advantageous development, the fine filter layer has a thickness in the range from 0.3 cm to 3 cm, preferably 0.5 cm to 2 cm. In this way, in a fine-open-pore design, very good separation of fine lint can be achieved, with a very good air throughput with a flow loss in the range from 1% to 5%.In a further embodiment which is expedient overall, the filter element has a length which extends in the direction of flow and has a value in the range from 5 cm to 30 cm, preferably 10 to 20 cm, and comprises a width in the range from 5 cm to 35 cm, preferably 7 cm to 25 cm, particularly preferably 10 cm to 20 cm. The width is the measure of the extent transversely to the flow direction.The laundry treatment appliance is preferably designed as a washer-dryer, wherein the process air module comprises a heat pump device, witha heat exchanger arrangement arranged in the channel section with a condenser as heating device and evaporator as condensation device, anda compressor having connecting lines to the heat exchanger arrangement, wherein the control device is configured to activate and deactivate the compressor in order to operate the heat pump device for the drying sequence. The fan which is already present is used here both for generating the process air stream for the drying phase and for venting for removing lint from the textiles.In this case, the control device can be designed to keep the heat pump device or the compressor switched off or switched off during the ventilation phase, so that only an air stream is generated without conditioning the process air.Alternatively, the control device can be designed to switch on or activate the heat pump device or the compressor during the ventilation phase, in order to condition the process air. In particular, the process air can be heated or heated. As a result, some textile fibers become more supple, so that an improved detachment of particles results with simultaneous movement of the laundry items.In an expedient embodiment of the laundry treatment appliance as a washer-dryer, it comprises a laundry detergent dispenser drawer having a grip plate which is designed as a partial region of the panel when the laundry detergent dispenser drawer is inserted, wherein the access opening for the filter element or the cover plate of the filter element is arranged laterally of the grip plate for the laundry detergent dispenser drawer.In an overall advantageous embodiment or development, the air inlet is arranged below the height of the axis of rotation of the drum. Thus, the air inlet in the rear end wall is arranged in the lower region, whereby a good and rectilinear air flow through the inlet to the drum and through the drum is achieved if the drum rear wall is formed with holes or in regions as a grid. A deflection of the air within the tub does not take place here.The air outlet is arranged in the front, upper region of the front end wall, whereby the process air is caused to flow through the drum diagonally in a rising manner from the rear to the front. The outlet is not reached by the laundry items moving in the drum and cannot be blocked by the latter because they always move downward, that is to say away from the outlet, on account of the force of gravity. This ensures that the flow of the process air is not obstructed.Overall, it is expedient to arrange the box-shaped channel section in such a way that the central axis of the channel section opens into the fan starting from the center of the air outlet. The deflection of the process air in the duct section from the inlet opening to the outlet opening to the blower is thus kept low, so that no or only a low flow resistance results. Furthermore, the path of the process air guidance is kept short, so that heat losses are also kept low.The fan is preferably arranged between the rear and the rear wall of the housing, because the installation space is particularly suitable for this purpose. The installation space is limited in the front region because the front load opening takes up a large proportion of the space between the front end wall and the front wall of the housing. The fan is preferably designed as a radial fan and comprises a flow housing with a fan wheel adapted therein. The flow housing has a diameter which corresponds at least to 4 times the axial extent of the fan, wherein the flow housing is located partially between the rear end wall of the tub and the housing rear wall in an extent perpendicular to the axial extent. In other words, the fan is arranged in the rear region of the appliance housing in such a way that at least a part of the flat flow housing is located between the rear end wall of the tub and the inner side of the housing rear wall. Preferably, the flow housing can be formed with a diameter that is more than 6 times or 8 times the axial extension. The fan wheel is designed to be adapted to the geometry of the flow housing. The axial extension is to be understood as the length of the flow housing without the drive motor located on the shaft.The laundry treatment appliance is preferably a washer-dryer, wherein the housing is 55 cm to 75 cm wide, 55 to 75 cm deep and 85 to 105 cm high. For the washer-dryer, the heat pump module as defined in the above examples is particularly useful. The housing dimensions already known on the market do not have to be changed in order to provide such a washer-dryer. In particular, the apparatus does not have to be designed to be higher than a comparable washer-dryer without a heat pump module arranged above the tub.An exemplary embodiment of the invention is partially schematically illustrated in the drawings and is described in more detail below. They show FIG. 1 : shows a schematic illustration of the laundry treatment appliance with a heat pump; FIG. 2 : shows the laundry treatment appliance in a perspective front view; FIG. 3 : parts of the units of the laundry treatment appliance in a perspective view; FIG. 4 : shows the laundry treatment appliance in a perspective front view; FIG. 5 : a sectional view of the channel section with inserted filter in a first embodiment; FIG. 6 : The filter element as an individual part in a flat embodiment, and FIGS. 7, 8 show a sectional view of the channel section with inserted filter in various embodiments.FIG. 1 shows the laundry treatment appliance 1 according to the invention in a schematic sectional illustration. The device 1 is a washer-dryer 1 with a housing 2 and the units arranged therein for carrying out treatment programs. Here, the unit with the suds container 4 and the drum 3 rotatably mounted therein can be seen. The interior of the drum 3 is accessible for loading and unloading by the front-mounted tubular bellows 6. The bellows 6 seals the suds container 4 from the door 5 located on the front wall. For conducting the wash water in the draw, an inlet line 41 and an inlet valve 42 are provided in order to feed water to the suds container 4 or the drum 3 in a washing phase. By means of the inlet line 41, the water is guided to the dispenser box 43 in order to guide detergent stored there with the water flowing through the box into the suds container 4. The dispenser box 43 is connected to the suds container 4 by means of the inlet pipe 44. The discharge device 60 comprises a pump 61 and a drain line 62, wherein the pump 61 is activated as required if this is provided in the course of an automatic washing drain. The discharge device 60 can preferably contain a separator 63 which is designed for separating lint, particles and in particular microparticles. The control device 90 is configured and programmed to activate and deactivate the actuators, i.e. the motor 70 for rotating the drum, the inlet valve 42 and the pump 61, in order to carry out a treatment program.The washer-dryer 1 further comprises a heat pump module 13 which is mounted in the housing 2 above the tub 4 and serves for generating a process air flow PL. The module 13 includes a refrigerant circuit in which refrigerant circulates in a piping system including an evaporator 15, a compressor 14 (FIG. 2 ) for compressing the refrigerant, a condenser 16, and a throttle (not shown), the heat exchanger including the evaporator 15 and the heater including the condenser 16 of the heat pump 13. The module 13 comprises a housing 17 (FIG. 2 ) in which a duct section 8 is incorporated and in which the evaporator 15 and the condenser 16 are mounted. The evaporator 15 and the condenser 16 are arranged in the channel section 8 in such a way that the moist process air PL is guided from the outlet 47 of the suds container 4 through the pipe 96 to the channel 8, 8 band flows first through the evaporator 15 in the channel 8 so that it is dehumidified due to the cooling and the condensation that follows. It then flows through the downstream condenser 16, which acts as a heater and heats the process air PL, so that the heated process air PL is introduced through the air inlet 46 into the suds container 4 and through openings 32 in the drum rear wall 31 into the drum 3 and is thus supplied to the textiles 10 to be treated. Condensate which arises is collected in the collecting trough 81 and is conducted by means of the condensate line 82 to the outlet 60, 62. The outlet 47 of the tub 4 is preferably arranged in the area of the loading opening on the front end wall of the tub 4 or in the tunnel-like passage area of the loading opening. The outlet 47, which forms the inlet to the heat pump module 13, is connected to the heat pump assembly 13, in particular to the duct section 8, by means of the line 96.The functional module 13 mounted above the tub 4 further comprises the blower 9 driven by the motor 91. The blower 9 comprises a flow housing 93, in the interior of which the fan wheel 92 is present. The housing 93 is flat and has a diameter at least 4 times larger than the axial length. The fan 9 is placed above the tub 4 in the appliance housing 2 in such a way that a part of the fan housing 93 extends in the gap between the tub rear wall 48 and the housing rear wall 21. The fan can preferably be designed as a radial fan, preferably with curved blades, so that it causes a higher volume flow in a preferred direction than in the counter-rotational direction.All directional and position information refers overall to the operationally set-up position of the treatment device 1.FIG. 2 shows the washer-dryer 1 with the housing 2 partially open. The front wall 22 comprises the loading opening which is closed by means of the door 23. The suds container 4 is pivotably suspended or supported in the interior of the housing 2. Within the tub 4 the drum 3 (shown in dotted lines) is rotatably mounted in a horizontal axis 33. The unit 13 for generating the process air PL is arranged above the tub 4 and completely in the interior of the housing 2. The unit 13 is fastened to the housing 2 so that it does not oscillate with the tub 4 when it oscillates due to imbalance in the rotating drum 3. The unit 13 comprises a housing 17 which serves for positioning and preferably fixing the compressor 14, the heat exchangers 15, 16, the lines 18 and the throttle 18 a. In the situation shown, the housing 17 is closed and in the operational state. The housing 17 comprises, in the approximately central region, the channel section 8, in which the heat exchangers 15, 16 are accommodated. The channel section 8 is provided downstream with the box-shaped deflection pipe 83 in order to deflect the laterally running process air flow in the direction of the blower 9. The blower 9 is connected to the circular outlet 83b of the deflection tube 83 and is located behind the housing 17 of the unit 13, which shows that the flat blower outlet 94 points downwards and is connected to the rear air line 95, which again opens into the air inlet 46 in or on the tub 4. The blower housing 93 extends at least with the lower region and the outlet 94 in the intermediate space between the rear end wall 48 of the tub 4 and the rear wall 21 of the appliance building 2.FIG. 3 shows the washer-dryer 1 in a partially assembled state. This shows the unit with suds container 4 and drum 3 and module housing 17 with blower 9 arranged above it. The feed pipe 96 is open on the inlet side and is arranged in the upper region of the bellows 6. The pipe 96 opens into the duct portion 8 bof the housing 17. in the duct portion 8 b, which is located in front of the heat exchanger 15 (FIG. 4 ), the lint filter element 100 is arranged to guide the process air PL to the heat exchangers 15, 16 free of lint. The filter element 100 is formed as a V-shaped pocket to make the active filter area larger than the cross section of the channel portion 8a. The filter element 100 can also be a woven mat or a nonwoven mat, also of multilayer design. The filter element 100 is preferably designed for separating microparticles. The channel section 8 is shown here without the heat exchangers 15, 16. The plane of the opening 106 in the channel section 8 bis substantially parallel or exactly parallel to the plane of the panel 24 or front wall 22. The connecting pipe 96 is attached to or in the channel portion 8 between the outlet opening 47 and the inlet opening. The bellows 6 forms the tubular connection of the housing-side load opening with the front access opening of the tub 4.FIG. 4 shows the device 1 in a perspective overall view with housing 2 in the embodiment with an access opening 107 in the front wall 22 or panel 24. In the example, the cover 103 is part of the filter element 100 and is configured with the latter as a single structural unit with the filter means 101. The cover 103 is preferably located in the plane of the cover 24 when the drawer 100 is inserted. The filter means 101 can be designed as a fine-mesh screen or gauze or as already described above. The front wall 22 with the door 5 pivotably mounted thereon can also be seen. The panel 24 arranged in the upper region of the front wall 22 can extend over the entire width of the appliance 1. The panel 24 can include, for example, control elements and a shaft opening for the laundry detergent dispenser box 43 (FIG. 1 ). In the example shown in FIG. 5, the filter element 100 is designed as a drawer, wherein the filter medium 101 can be introduced into the channel section 8 athrough the tube opening 106 or is located in the channel section 8 ain the operational situation. A sealing means 105 is applied around the edge surrounding the opening 106 to sealingly close the opening 106 when the filter element 100 is in the inserted and operational position.FIG. 5 shows a section of the channel section 8 awith the filter element 100 inserted. The filter element 100 is formed as a flat body and obliquely lies in the channel portion. The process air passes from the lower connector into the filter housing 102 and there passes through the filter medium 101 of the filter element 100. The process air PL leaves the filter element 100 at the top side of the filter means 101. The filtered process air PL then passes within the duct 8 to the heat exchanger 15 and the further components (not shown) of the unit 13 for generating the process air PL.FIG. 6 shows the filter element 100 with its individual parts. The element 100 comprises a supporting frame 102 which is equipped with a gauze layer 107 of planar configuration. The filter means 101 is inserted into the supporting frame, which is formed as a flat mat of open-pored and fine-pored foam. The filter means 101 can be referred to as a fine filter and can also consist of a multi-layer, fine-mesh fabric. These mentioned components 102, 107 and 101 can already complete the filter element 100. In order to stabilize the filter means 101, a cover frame 104 is provided, which is placed on the filter means 101 inserted in the support frame 102 and latched to the support frame 102.FIG. 7 shows a section of the channel section 8 awith inserted filter element 100 in a preferred embodiment. The filter element 100 is formed as a V-shaped body and is inserted into the channel portion 8a such that the opening of the Vs is upstream. The tip 108 of the Vs is thus behind the V-aperture. The process air PL reaches the filter housing 102 from the lower connection piece 8 band passes there through the gauze-shaped coarse filter 107 and then the filter medium 101 of the filter element 100. The process air PL leaves the filter element 100 at the upper side of the filter means 101 and the lower side of the filter element 101. The filtered process air PL then passes within the duct 8 to the further components (not shown) of the unit 13 for generating the process air PL. It can be seen that the gauze-like coarse filter lies within the Vs. The V forms a pocket in the arrangement into which the lint can be collected. It can also be seen that the filter element 100 or the components fine filter 101, receiving frame 103 and coarse filter 107 are received in a receiving housing 110 and form a modular unit.FIG. 8 shows a section of the channel section 8 awith inserted filter element 100 in a preferred embodiment. The filter element 100 is formed as a V-shaped body and is inserted into the channel portion 8a such that the opening of the Vs is downstream. The tip 108 of the Vs is thus located in front of the V-orifice. The process air PL passes from the lower connection piece 96 into the filter housing 110, 102, and passes there through the gauze-shaped coarse filter 107 and then the filter medium 101 of the filter element 100. The process air PL leaves the filter element 100 at the upper side of the filter means 101 and the lower side of the filter element 101. The filtered process air PL then passes within the duct 8 to the further components (not shown) of the unit 13 for generating the process air PL. It can be seen that the gauze-like coarse filter lies outside the Vs. The V forms a pocket in the arrangement, wherein the lint can be collected on the outer sides. It can also be seen that the filter element 100 or the components fine filter 101, receiving frame 103 and coarse filter 107 are received in a receiving housing 110 and form a modular unit. The receiving housing 110 can also be used for a flat filter element 100 according to FIGS. 5 and 6.All directional information and position information relate overall to the operationally set-up position of the laundry treatment appliance 1.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedEP 2 843 103 A1

[0002]

Claims

Laundry treatment appliance (1) having the following features: - a housing (2); - a cylindrical tub (4); - a cylindrical drum (3) which is rotatably mounted in the tub (4) with a horizontal or inclined axis (33) and is designed for receiving laundry; - wherein the drum (3) has openings (32) or perforations in its front-side rear wall (31) in order to allow an air flow (PL) from the tub (4) through the drum (3); - wherein the tub (4) has an air inlet (46) and an air outlet (47); - an inlet device (42) for inlet of washing liquid into the tub (4); - a discharge device (60) for discharge of the washing liquid from the tub; a process air module (13) which is mounted in the housing (2) above the tub (4), having - a module housing (17) comprising a duct section (8, 8a), - a fan (9) for generating or conveying process air (PL) through the duct section (8, 8a) and the drum (3); - a first tube (95) for connecting the duct section (8) to the air inlet (6) of the tub (4) and a second tube (96) for connecting the duct section (8) to the air outlet (47) of the tub (4) and a filter element (100) which is arranged in the duct section (8a) or in the second tube (96); a control device (90) which is configured and programmed to activate and deactivate the actuators, i.e. the motor (70) for rotating the drum (3), the inlet device (42) and the outlet device (60, 61), in order to carry out a treatment program (P), characterized in that the filter element (100) is designed as a flat body made of filter means (101, 102, 107) and is arranged obliquely at an angle in the range from 5° to 45°, preferably 7° to 30°, particularly preferably 7° to 20°, in the direction of extension in the direction of flow of the channel section (8a).Laundry treatment appliance (1) according to claim 1, wherein the channel section (8a) is formed as a flat hollow body having a height in the range from 2 cm to 8 cm and a width in the range from 5 cm to 35 cm, preferably 7 cm to 25 cm, particularly preferably 10 cm to 20 cm, wherein the filter element (100) is formed as a flat, flat body and is arranged obliquely in the channel section (8a).Laundry treatment appliance according to claim 1, wherein the channel section (8a) is formed as a flat hollow body having a height in the range from 2 cm to 8 cm and a width in the range from 5 cm to 35 cm, preferably 7 cm to 25 cm, particularly preferably 10 cm to 20 cm, wherein the filter element (100) is furthermore formed in a kinked manner, such that the filter element (100) is formed in a V-shaped manner with an acute angle.The laundry treatment appliance according to claim 3, wherein the filter element (100) is inserted into the channel portion (8a) such that the tip (108) of the Vs is located downstream of the V-opening.The laundry treatment appliance according to claim 3, wherein the filter member is inserted into the channel portion (8a) such that the tip (108) of the Vs is located upstream of the V-opening.Laundry treatment appliance according to any one of claims 1 to 5, further comprising a box-shaped receiving housing (110) in which the filter element (100) is inserted, wherein the receiving housing (110) with the filter element (100) is slidably inserted into the tube portion (8a).Laundry treatment appliance (1) according to one of claims 1 to 6, wherein the filter element (100) is constructed in multiple layers, with at least one support layer (102), a fine filter layer (101) made of fleece or open-pored foam or a multiple-layer woven fabric applied to the support layer (102), and a layer (107) made of gauze or screen-shaped woven fabric applied to the fine filter layer (101).Laundry treatment appliance (1) according to claim 7, wherein the fine filter layer (101) has a thickness in the range of 0.3 cm to 3 cm, preferably 0.5 cm to 2 cm.Laundry treatment appliance (1) according to any one of claims 1 to 8, wherein the filter element (100) has a length extending in the flow direction with a value in the range from 5 cm to 30 cm, preferably 10 to 20 cm and comprises a width in the range from 5 cm to 35 cm, preferably 7 cm to 25 cm, particularly preferably 10 cm to 20 cm.Laundry treatment appliance (1) according to one of claims 1 to 9, wherein the process air module comprises a heat pump device (13), having - a heat exchanger arrangement arranged in the channel section (8) and having a condenser (16) as heating device and evaporator (15) as condensation device, and - a compressor (14) having connecting lines to the heat exchanger arrangement (15, 16), wherein the control device (90) is configured to activate and deactivate the compressor (14) in order to operate the heat pump device (13).Laundry treatment appliance (1) according to any one of claims 1 to 10, wherein the control device (90) is configured to - activate and deactivate the drive motor (70), to move the drum with washing liquid during the treatment program (P) and to move the laundry during the wet treatment (W) for a predetermined duration; - activate the discharge device (60, 61) for removing the used-up or dirty washing liquid from the drum (3) or the tub (4) after the elapse of the predetermined time of the wet treatment (W); - activate the drive motor (7) for a predetermined duration, to rotate the drum (3) at a speed above the application speed for carrying out a spin-up phase (S).Laundry treatment appliance (1) according to one of claims 1 to 11, wherein the housing (2) comprises an access opening (107) to the channel section (8b) or tube (96) and the channel section (8a) or tube (96) comprises an access opening (106) for the filter element (100) which can be closed by a cover.Laundry treatment appliance (1) according to one of claims 1 to 12, wherein in the tub (4) the air inlet (46) in the rear end wall (48) is arranged in the lower region and wherein in or on the tub (4) the air outlet (47) is arranged in the front, middle upper region of the front end wall.Laundry treatment appliance (1) according to one of claims 1 to 13, wherein the fan (9) is arranged at least partially behind the rear end side (48) of the tub (4).The laundry treatment appliance (1) according to any one of claims 1 to 14, which is a washer-dryer (1), wherein the housing is 55 cm to 75 cm wide, 55 to 75 cm deep, and 85 to 105 cm high.

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