EP2857574A1 - Bag for filtering of lint - Google Patents

Abstract

The invention relates to a bag (2) for filtering lint from the process air flow of a tumble dryer with a rotatably mounted in a housing drum, wherein the process air stream inter alia via an intermediate between the drum and a heat exchanger as a flow channel air duct (1), wherein the Bag on the air duct (1) can be used. According to the invention, the bag (2) by means of an adapter plate (4) on the air guide (1) is mounted.

Description

The invention relates to a bag for filtering lint from the process air flow of a tumble dryer with a rotatably mounted in a housing drum, wherein the process air flow inter alia via an interposed between the drum and a heat exchanger as a flow channel air duct, wherein the bag is used on the air duct and by means of a trained as a closed angle profile adapter plate on the air guide can be attached.

From the KR 100823328 B1 a filter device for arrangement in a filter box is known. The filter device may consist of one or more filter bodies. A filter body has a support frame on which an example quarder-shaped filter frame is attached. The filter frame carries as filter surface a filter tube.

From the DE 11 2008 000 427 T5 is a filter for arrangement in an air duct known. The filter forms a space for collecting fluff by firmly connecting a front and a rear frame with each other. At the top of the front frame a plurality of suction openings for introducing the process air are formed. At the respective bottom of the front and rear frame, a mesh screen is designed as an outlet for the process air. In order to prevent leakage of lint into the air duct, the rear frame of the filter and the rear portion is formed with a sealing unit.

From the prior art is according to the EP 2 492 389 a tumble dryer with a disposable lint filtering known. In this known device, the circulating through the laundry drum air flow is filtered by means of a bag. Here, in the exhaust air stream of the air cycle of the laundry drum Wäscheflusen be entrained, wherein the retention of these Wäscheflusen the filter device is used, which is arranged in the exhaust duct of the tumble dryer. The lint filter device in this case comprises a filter bag with a bag opening and a bag interior, wherein the filter bag according to the prior art is arranged in the door of the clothes dryer.

According to a further embodiment of the prior art according to the DE 295 17 898 a further lint filter device for a household laundry dryer is known, wherein in this embodiment, the lint filter device is arranged to trap entrained in the process air Wäscheflusen in the exhaust duct. The lint filter device here is likewise designed as a removable bag. The bag essentially comprises a holding frame and a filter bag or a filter bag fastened therein. The support frame may be formed as a closed frame or as a split frame. The filter bag is used here in the housing-side exhaust duct.

A disadvantage of these described in the prior art embodiments, it is considered that, especially in the latter embodiment, the filter bag, which is arranged in the exhaust duct, is difficult to access. The filter bag must be removed by reaching into the exhaust duct from this, it is not uncommon that fluff fall in particular in the exhaust duct, so that they can sit in front of the cooling fins of the heat exchanger. Further, it is considered disadvantageous that the integration of the bag in the exhaust duct is not sufficiently safe and stable in position.

From the DE 89 12 692 U1 is a filter in the form of a bag for filtering lint from the process air flow of a clothes dryer according to the preamble of claim 1 known. An improved integration of the bag in the flow channel is achieved by angle profiles that hold the filter bag in the inlet opening. A disadvantage of this described in the prior art embodiment, it is considered that the angle profiles shown there still do not allow a safe and stable position of the filter on the air duct.

The invention thus raises the problem of further developing a tumble dryer and here in particular a lint filter stored in the flow channel which on the one hand overcomes the described disadvantages, in particular the problem being solved that the bag incorporated in the flow channel has a much better accessibility, wherein to be avoided when removing the bag from the holder that particular lint get into the flow channel or in the air duct, and wherein a better integration of the bag should be provided. Here, in particular, a secure and sealing integration and a stable position of the bag to the air duct should be created.

According to the invention, this problem is solved by the features of patent claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

The advantages achieved with the invention consist in the fact that a secure and stable position of the bag opening is given to the air duct by the integration of the bag by means of an adapter plate. In this case, the adapter plate engages in the bag to avoid leaching in the inlet area. In addition, results from the adapter plate increased surface moment, which has a lower distortion as a stiffer component. The bevels on the sides of the adapter plate allow the customer a much better positioning of the bag. In addition, this results in a self-centering of the bag during operation. Round outer contours and the shape of the elongated hole favor the molding of a sealing lip, wherein the inwardly facing round tapered contour favors the flow especially the air flow. As a result, a free vibration in the height direction is also possible in the injection molding process, to a lower distortion of the component than in a non-conical inlet.

In this case, in particular, the seals can be designed as circulating in various forms. In this case, the cambered design of the adapter plate has a particularly advantageous effect, and this is very sensible because, in the case of a seal which has to be pressed with a relatively high force, the sufficient tensioning of the seal is ensured. This force would now be sufficient to press the adapter plate over the entire surface. Due to the cambered shape and a high contact pressure one is independent of manufacturing tolerances. It is ergonomically better to provide a thin sealing lip, which requires a much lower spring stiffness and which would also require a lower contact force in order to achieve the necessary deformation. To ensure a process-reliable sealing effect of the cover plate, it is necessary that the lower edge of the seal has a high flatness.

According to the invention, the bag is attached to the air duct by means of an adapter plate. The adapter plate itself consists of a closed angle profile, which has a substantially horizontally oriented leg for resting on the air duct. In this case, the horizontally oriented leg on a running under a slope end portion which carries an applicable to the air guide seal.

The seal may in this case advantageously consist of a simple lip seal, a double lip seal or a block seal.

As such, the adapter plate has a slot-like or elliptical shape, with the substantially vertically-oriented leg having a leg orientation with a slight incline so as to create a funnel shape.

The bag can be welded or glued with its opening edge on the adapter plate. In another alternative, the bag is releasably attachable to the adapter plate. As a result, manufacturing costs can be saved. It can then either be provided as an integral part of the clothes dryer an adapter plate or be enclosed with a container which contains, for example, four or five bags, an adapter plate.

According to a particularly preferred embodiment, the frame of the adapter plate is arched, wherein due to this curvature in particular of the horizontally oriented Thigh in the inserted state, the adapter plate rests under tension on the air duct, which in this case causes a sealing contact with the air flow for the bag.

According to a particularly advantageous embodiment of the invention, the adapter plate as a profile shape preferably has an angular shape. In this case, the angle shape has a substantially horizontally oriented leg for resting on the air guide, wherein the leg oriented substantially vertically is intended for securing the bag. The horizontally oriented leg in this case has a running under a slope end.

In a further development of the invention, the end region of the limb running under a slope rests against the air guide under an arranged circumferential seal. In this case, the seal may in particular consist of a flat lip seal or a double lip seal or a block seal, which is in this case peripherally attached to the adapter plate. The use of a flat lip seal would have the advantage that it already achieved the required sealing effect with a lower force, which would be achieved in the double lip seal only with a relatively high force. The latter would also apply to a block seal.

According to a particularly advantageous embodiment of the vertically oriented leg is formed under a curvature or rounding on the horizontal leg, wherein the leg alignment has a slight conicity. Due to this design, a flow-favored inlet at the edge of the bag is created, and this also means that the customer or the operator here has a secure handle for the use of the bag.

According to a particularly advantageous embodiment of the invention, the adapter plate has a cambered shape. This can be formed either convex or concave, which contributes in particular to increase the tightness. Because in the cambered design, the adapter plate is inserted under a clamping position on the air duct, the force is applied to the cover to be used or the cover. The cover member presses in the inserted state, the circumferential seal thus to the air flow, so that it rests against the air duct under a press fit.

Thus, the frame of the cover plate is pressed in the inserted state of a cover under tension in the sealing position. In this case, the cover comprises a trained as a thrust laundry barrier, which forms the entrance of the flow channel.

The invention also relates in the same way to a tumble dryer with a bag which is designed according to the described features.

Figur 1

eine perspektivische Darstellung der Luftführung gemäß der Erfindung mit einem Beutel in der explosionsartigen Darstellung;

Figur 2

eine weitere Darstellung der Luftführung im Ansatz mit dem Abdeckteil ebenfalls in explosionsartiger Darstellung;

Figur 3

eine weitere Darstellung der Luftführung in Rückansicht mit angesetztem Abdeckteil und einer Detailansicht;

Figur 4

eine Frontansicht der Luftführung;

Figur 5

eine geschnittene Detailansicht der Luftführung mit angesetztem Abdeckteil gemäß der Schnittlinie A - A in Figur 5;

Figur 6

eine weitere geschnittene Darstellung der Luftführung gemäß der Schnittlinie B - B in Figur 4;

Figur 7

eine Detailansicht der Abdeckplatte im verspannten Zustand an der Luftführung;

Figur 8

eine Einzeldarstellung der Adapterplatte in der Perspektive;

Figur 9

eine Seitenansicht der Adapterplatte mit bombierten Linienführungen und

Figur 10

eine geschnittene Detailansicht der Adapterplatte mit angesetztem Beutel, sowie Ausführungsformen von Dichtungen a, b, und c.

An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows:

FIG. 1

a perspective view of the air duct according to the invention with a bag in the exploded view;

FIG. 2

a further illustration of the air duct in the approach with the cover also in explosive representation;

FIG. 3

a further illustration of the air duct in rear view with attached cover and a detail view;

FIG. 4

a front view of the air duct;

FIG. 5

a sectional detailed view of the air duct with attached cover according to the section line A - A in FIG. 5 ;

FIG. 6

a further sectional view of the air duct according to the section line B - B in FIG. 4 ;

FIG. 7

a detailed view of the cover plate in the clamped state of the air duct;

FIG. 8

a detailed view of the adapter plate in perspective;

FIG. 9

a side view of the adapter plate with curved lines and

FIG. 10

a detailed sectional view of the adapter plate with attached bag, as well as embodiments of seals a, b, and c.

The FIG. 1 shows in particular in the exploded view of an air guide 1 with a bag 2 for a clothes dryer, not shown, which comprises a housing in which a drum is rotatably mounted. The tumble dryer in this case has a device for generating a process air stream, which flows via an intermediate between the drum and a heat exchanger as a flow channel 3 air duct 1, wherein in the air guide 1 lint filtering by means of the bag 2 shown. The flow channel may be an integral part of the air duct, but it may also be at least partially designed as a usable insert. It is suitable at its upper edge for receiving an adapter plate 4 described below.

As in particular from the FIG. 1 but also from the FIGS. 7 . 8th . 9 and 10 is clarified, the bag 2 is integrated by means of the adapter plate 4 to the flow channel 3 of the air guide 1. Here, the bag 2 is welded or glued with its opening edge 5 on the adapter plate 4. As in particular from the FIG. 8, 9 and 10 becomes clear, in this case, the adapter plate 4 comprises a frame which causes a sealing contact with the air guide 1 for the bag 2, this situation in particular in the FIGS. 5 and 6 but also in the FIG. 7 is shown in the exposed representation. As can be seen from the synopsis of the described figures, in this case the adapter plate 4 has a profile shape, preferably an angular shape. The angle form here comprises a substantially horizontally oriented leg 6 for engagement with the air guide 1, wherein the substantially vertically oriented leg 7 is intended to define the bag edge. The integration of the bag 2 is here in particular in the FIGS. 5 and 6 to recognize.

As in particular from the FIG. 5, 6 and 7 can be clearly seen, the horizontally oriented leg 6 an under a slope 8 extending end region. It lies, as in particular from the FIG. 10 can be seen, under the slope 8 of the leg 6, a circumferential seal 9, which applies in the inserted state of the bag 2 with the adapter plate 4 to the air guide, shown in the FIG. 7 , According to a particularly advantageous embodiment of the seal 9, shown in the FIG. 10 , this can consist of a simple lip seal a, wherein a double lip seal b can be used, which is designed as a downwardly open parabola. It is also conceivable here to design the seal 9 as a block seal c. The use of a flat lip seal a would have the advantage that it already achieved the required sealing effect with a lower force, which would be achieved with the double lip seal b only with a relatively high force. The latter would also apply to a block seal c, since this is to be pressed flat over the extending opening edge of the air guide 1, so that it has the reliable sealing effect.

The seal can also be realized in an embodiment not shown in the drawings in that the bag material 2.1 preferably protrudes into the region of the horizontally oriented leg 6 and then rests against the flow channel 3. In this case, the bag material 2.1 is compressed during insertion of the adapter plate due to the shape of adapter plate 4 and air guide adapter 3 and can thereby act as a seal. This embodiment has the advantage that no additional sealing material is needed. As a result, a seal in this form can be produced very inexpensively.

In a further variant, also not shown and not belonging to the invention, one of the seals a, b or c or another suitable seal can be arranged on the flow channel 3. This has the advantage that the seal is not disposed of with each bag together, but can remain in the device. The manufacturing costs of the adapter plate 4 are cheaper in this embodiment.

As in particular from the FIG. 7 and 10 can be clearly seen, the vertically oriented leg 7 is formed under a curvature 10 on the horizontal leg 6, wherein the leg orientation has a slight taper 11. Due to this design it is achieved that in particular the flow inlet in the region of the opening edge of the bag 2 is designed to be low here. The FIG. 10 also shows the attachment of the bag material 2.1 and a receiving groove 9.1 on the horizontal leg 6, in which the seal 9 can be attached.

According to an advantageous embodiment of the adapter plate 4, this is executed cambered, the cambered curvature in particular in the FIG. 9 is indicated. Here, the domed shape can be either concave or convex. Due to this design is achieved in particular that in the inserted state of the adapter plate 4, the Seal 9 is held at the air guide 1 under a certain tension. Thus, the frame of the adapter plate 4 in the inserted state, as shown in the FIG. 2 and 3 is shown by a cover 12 can be pressed under tension in the sealing position, as this particular in the FIGS. 5 and 6 but also in the FIG. 7 will be shown. The cover member 12 in this case has a lower edge region 12.1, which is in particular wedge-shaped. The wedge shape favors this particular one hand, the piecing of the cover 12 on the attached cover plate 4 on the air guide 1, because thereby the threading of the cover is favored. On the other hand, the contact pressure with the penetration depth of the edge region 12.1 on the adapter plate 4 is increased by the wedge shape, which favors the sealing effect of the bearing seal 9.

In this case, according to an advantageous embodiment of the invention, the cover 12 is formed as a thrust, which serves here as a laundry barrier to the air duct 1 due to its sieve-like top surface.

LIST OF REFERENCE NUMBERS

1

air duct

2

bag

3

Flow channel / air duct

4

adapter plate

5

opening edge

6

horizontal thigh

7

vertical thigh

8th

slope

9

poetry

10

curvature

11

taper

12

cover

Claims (10)

Bag (2) for filtering lint from the process air stream of a tumble dryer with a rotatably mounted in a housing drum, wherein the process air flow inter alia via an intermediate between the drum and a heat exchanger as a flow channel air duct (1), wherein the bag on the air duct (1) can be used and can be attached to the air guide (1) by means of an adapter plate (4) designed as a closed angle profile, characterized in that
in that the angle profile has a substantially horizontally oriented limb (6) for resting on the air guide (1), which carries a seal (9) which can be applied to the air guide (1) and wherein the horizontally oriented limb (6) has a slope (Fig. 8) extending end region. Bag according to claim 1,
characterized,
that the seal (9) consists of a simple lip seal, or a double lip seal or a block seal. Bag according to claim 1,
characterized,
that the seal (9) consists of the located on the adapter plate bag material. Bag according to claim 3,
characterized,
in that the seal (9) consists of the bag material projecting into the region of the horizontally oriented leg (6). Bag according to at least one of claims 1 to 4,
characterized,
that the adapter plate (4) has a slot-like or elliptical shape. Bag according to at least one of claims 1 to 5,
characterized,
in that the adapter plate (4) has a substantially vertically oriented limb (7), the limb orientation producing a funnel shape with at least a slight inclination. Bag according to at least one of claims 1 to 6,
characterized,
that the bag (2) welded to its opening edge (5) on the adapter plate (4) or is glued. Bag according to at least one of claims 1 to 6,
characterized,
that the bag (2) releasably attached to the adapter plate (4) can be fastened. Bag according to at least one of claims 1 to 8,
characterized,
that the adapter plate (4) due to a curvature of the horizontally oriented leg (6) in the inserted state under tension against the air guide (1). Clothes dryer with a bag according to one of claims 1 to 9.

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