DE202020005475U1 - Sealing element, in particular for sealing an oven or fireplace door - Google Patents

Abstract

Sealing element, in particular for sealing an oven or fireplace door, having
a hose element (2) which is formed by a wall with a wall thickness (d);
an elongated spring element (4); wherein the hose element (2) is bent around its main extension (H) in such a way that it has a bent area (6) formed by two parallel layers (22, 24) of its wall, the spring element (4) in the bent area (6) is arranged; and
a seam (8) formed along the main extension (H) of the hose element (2), by means of which the two layers (22, 24) are connected to one another in such a way that, viewed in a normal cross-section, they encompass the spring element (4),
with reference to the seam (8) on a side opposite the spring element (4), a tube element protrusion (10) is formed by part of the tube element (2).

Description

The invention relates to a sealing element, in particular a sealing element for sealing an oven or fireplace door.

In cooking appliances, such as an oven or a stove, elastic seals are usually attached to seal a cooking space between an appliance door and a cooking space. From the DE 10 2017 200 681 A1 a seal for sealing an oven door is known which has a sealing body which has an outside fiber layer in the form of a glass silk tube and an inside elastic polymer inlay in the form of a silicone tube. Between the fiber layer and the polymer inlay there is a resilient intermediate layer, which is designed as a knitted stainless steel wire tube. The fiber layer on the outside protects the polymer inlay from high temperatures, because the glass fiber is high temperature resistant and heat insulating. This means that the seal can also be used in ovens with a pyrolysis function. The polymer inlay has a continuous, closed surface so that the passage of hot gas can be prevented. The elastic polymer inlay and the resilient intermediate layer support the fiber layer on the outside.

If an oven has an integrated steamer function, a considerable amount of water vapor is typically formed in the cooking space when it is used as a steamer. It has now been shown that in such a case or in similar cases, for example in the case of a fireplace door, the sealing effect of the above-mentioned seal is not optimal, since water vapor can escape to the outside from the cooking space.

The object of the present invention is therefore to provide an improved sealing element, in particular an improved sealing element for sealing an oven or fireplace door. In addition, a method for producing such a sealing element is to be specified.

According to the invention, this object is achieved by the subjects of the independent claims. Advantageous configurations with expedient developments of the invention are specified in the respective dependent claims.

According to the invention, a sealing element is provided, in particular for sealing an oven or fireplace door, which has a hose element, an elongated spring element and a seam. The hose element is formed by a wall with a wall thickness. The hose element is bent about its main extent in such a way that it has a bent area formed by two parallel layers of its wall, the spring element being arranged in the bent area. The seam is formed along the main extent of the hose element, the two layers being connected to one another by the seam in such a way that, viewed in a normal cross section, they each encompass the spring element. With reference to the seam on a side opposite the spring element, a tube element protrusion is formed by part of the tube element.

The sealing element has a particularly good sealing function with respect to water vapor and / or liquid, since more sealing material suitable for this is made available due to the hose element protrusion. Thus, the sealing element is particularly suitable for sealing a cooking space or a chimney interior, in which a correspondingly high level of liquid or vapor development must be expected.

The wall thickness of the wall of the hose element is preferably uniform overall. This is advantageous, inter alia, with regard to simple manufacture.

The part of the hose element by which the hose element protrusion is formed is preferably at least 10% of the total hose element, preferably at least 20%, particularly preferably at least 25%, when viewed in normal cross section. In this way, a particularly well-suited accumulation of material for achieving the sealing effect can be brought about by the protrusion of the hose element.

The protrusion is preferably formed by two partial areas of the hose element which are only connected to one another by the seam. In this way, when the sealing element is attached in a corresponding groove of an oven door or the like, which serves as a sealing seat, the protruding hose element can be inserted particularly well in such a way that it can develop a suitably high sealing effect. This is particularly true when the two sub-areas differ in size by less than 20%.

The spring element preferably has a tubular shape. In particular, a suitable stop function for the sealing element can be achieved in this way.

The spring element preferably has a wire. In particular, the spring element can consist of a wire. The wire can, for example, expediently be made of stainless steel or have stainless steel.

The spring element is preferably braided or knitted.

The tubular element is preferably braided or knitted. The edges of the hose element pointing in the axial direction or along the main extent are preferably closed.

The tube element preferably consists of a textile fiber, for example a textile glass. For example, the tube element can consist of fiberglass and / or a basalt fiber. As an alternative or in addition, the hose element can have another natural stone fiber or consist of one.

The hose element can be designed to be particularly suitable to withstand high temperatures by the features mentioned.

As is known per se from the prior art, the sealing element is preferably designed as a whole ring-shaped. In this way, it is particularly suitable for a closed circumferential seal, for example along the edge of an appliance door.

• • Das Dichtungselement weist in axialer Richtung geschlossene, saubere und nicht fasernde Kanten auf. Hierdurch lässt sich eine besonders einfache Montage des Dichtungselements, beispielsweise in einem Muffelschlitz bewirken.
• • Durch den Schlauchelement-Überstand ist ein „dickwandiger Metarialaufbau“ gebildet, der vier Lagen der Schlauchelementwand aufweist: Auf diese Weise ist eine sehr gute dichtende Wirkung und Feuchtigkeitsaufnahme ermöglicht.
• • Textilfasern und Basaltfasern sind besonders umweltfreundliche Rohstoffe.
• • Durch das Federelement eignet sich das Dichtungselement als Türanschlag mit einer besonders langlebigen Abdichtwirkung.
• • Durch die genannten Materialien lässt sich eine besonders hohe Feuchtigkeitsaufnahmefunktion erzielen, so dass bei einer Anwendung des Dichtungselements beispielsweise in Verbindung mit einem Backofen Öle, Fette oder auch Wasserdampf geeignet aufgesogen werden können und auch wieder abtrocknen bzw. verdampfen können.
• • Durch die Textilfaser und die Struktur des Dichtungselements lässt sich eine besonders gute thermische Dichtungsfunktion erzielen.
• • Durch Verwendung des erfindungsgemäßen Dichtungselements bei einem Gerät, beispielsweise eines Backofens, einer Mikrowelle oder eines Dampfgarers, lässt sich für das Gerät eine besonders hohe bzw. gute Energieeffizienzklasse erzielen.
• • Das erfindungsgemäße Dichtungselement lässt sich durch Clips besonders gut und sicher an einer Backmuffel oder dergleichen befestigen.

The following advantages in particular can be achieved with the sealing element according to the invention:

• • The sealing element has closed, clean and non-fraying edges in the axial direction. This enables particularly simple assembly of the sealing element, for example in a muffle slot.
• • The tube element protrusion creates a "thick-walled metarial structure" that has four layers of the tube element wall: This enables a very good sealing effect and moisture absorption.
• • Textile fibers and basalt fibers are particularly environmentally friendly raw materials.
• • The spring element makes the sealing element suitable as a door stop with a particularly long-lasting sealing effect.
• • A particularly high moisture absorption function can be achieved with the materials mentioned, so that when the sealing element is used, for example in connection with an oven, oils, fats or even water vapor can be suitably absorbed and also dry off or evaporate again.
• • A particularly good thermal sealing function can be achieved through the textile fiber and the structure of the sealing element.
• • By using the sealing element according to the invention in a device, for example an oven, a microwave or a steam cooker, a particularly high or good energy efficiency class can be achieved for the device.
• • The sealing element according to the invention can be attached particularly well and securely to a baking muffle or the like by means of clips.

Further advantages, features and details of the invention emerge from the following description of a preferred exemplary embodiment and with reference to the drawings. The features and combinations of features mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the specified combinations, but also in other combinations or on their own, without the scope of the invention to leave.

• 1a eine schematische Seitenansicht eines Schlauchelements zum Herstellen eines erfindungsgemäßen Dichtungselements;
• 1b eine schematische Seitenansicht eines erfindungsgemäßen Dichtungselements;
• 2 eine schematisch perspektivische Ansicht eines Endbereichs des Dichtungselements, wobei das Federelement zur Verdeutlichung des Aufbaus axial überstehend skizziert ist; und
• 3 eine schematische Skizze eines normalen Querschnitts durch das Dichtungselement.

Show:

• 1a a schematic side view of a hose element for producing a sealing element according to the invention;
• 1b a schematic side view of a sealing element according to the invention;
• 2 a schematic perspective view of an end region of the sealing element, wherein the spring element is sketched axially protruding to illustrate the structure; and
• 3 a schematic sketch of a normal cross-section through the sealing element.

1a shows a schematic side view of a hose element 2 ' for producing a sealing element according to the invention. The hose element 2 ' is formed by a wall with a particularly uniform wall thickness. The hose element 2 ' is shaped so that two layers 2a , 2 B the wall of the hose element 2 ' viewed in cross section are aligned parallel to one another, as in the right part of FIG 1a indicated. The hose element 2 ' extends along its main extension H.

1b shows the finished sealing element. In addition to the hose element, the sealing element has the reference symbol here 2 referred to, another elongated spring element 4th on. 2 shows in perspective an end area of the sealing element, 3 a corresponding, with reference to the main extension H normal cross section through the sealing element. In 3 is the wall thickness d of the hose element 2 designated.

The hose element 2 of the sealing element is bent around its main extension H in such a way that it has one, through two parallel layers 22nd , 24 its wall formed, curved area 6th having, wherein the spring element 4th in the bent area 6th is arranged. The two parallel layers 22nd , 24 the wall or the curved area 6th can, based on the in 1a sketched state of the hose element, by bending the two layers accordingly 2a , 2 B be formed around a bending axis running parallel to the main extension H.

The spring element 4th is in the curved area 6th arranged. A main extension of the elongated spring element runs here 4th parallel to the main extension H of the hose element 2 .

In the 1b and 2 is the spring element 4th with reference to the main extension H, that is to say axially over the hose element 2 outlined above. However, this is only intended to better illustrate the structural design of the sealing element. The spring element preferably extends 4th with reference to the main extent at both end regions of the sealing element not over the hose element 2 out. For example, the hose element 2 and the spring element 4th have the same length with respect to the main extension H.

Furthermore, the sealing element has one along the main extension H of the hose element 2 formed seam 8th through which the two layers 22nd , 24 are connected to one another in such a way that, viewed in the normal cross-section, the spring element 4th each grip. Here is - with reference to the seam 8th - on one of the spring element 4th opposite side through part of the hose element 2 a tube element protrusion 10 , short overhang 10 educated. In the example shown, the part of the hose element is 2 through which the supernatant 10 is formed, viewed in the normal cross-section, more than 25%.

How out 3 the supernatant can be seen 10 by four layers of the wall of the hose element 2 educated.

The supernatant 10 is through two sub-areas 12th , 14th of the hose element 2 formed merely by the seam 8th are connected to each other. The two sub-areas are preferably different 12th , 14th in their sizes by less than 20%. For example, the two sub-areas 12th , 14th - as is the case in the example shown - be roughly the same size, i.e. differ in size by less than 5%, for example.

The spring element 4th has a tubular shape. Due to the tube shape is inside the spring element 4th a cavity continuously along its main extent 42 educated. In this way, a suitable stop function with a damping effect can be achieved for the sealing element. Without a corresponding cavity, for example when using a fuse instead of the tubular spring element 4th if this could not be achieved in such a suitable manner, because the material of the fuse would mean that a corresponding device door would no longer be able to be properly closed. By contrast, the tube shape advantageously allows a correspondingly suitable spring action for the spring element 4th achieve.

The spring element 4th is, for example, expediently braided or knitted from a stainless steel.

The hose element 2 preferably comprises a textile glass, for example glass silk and / or a basalt fiber material. In particular, the hose element 2 consist of such a material.

The hose element 2 is in particular comparatively thick-walled. For example, it can be provided that the wall thickness d of the hose element 2 is between 50 µm and 4000 µm, more preferably between 100 µm and 3500 µm, even more preferably between 250 µm and 3000 µm. By having the supernatant 10 is formed by four layers of the wall, results in the total thickness of the overhang 10 a correspondingly large value. In other words, this is because the supernatant 10 comprises four layers, at this point a correspondingly high one, due to the overhang 10 formed accumulation of material, through which a particularly suitable sealing effect is made possible for the sealing element, in particular against water vapor. In addition, it can be achieved that the supernatant 10 Not only can it absorb moisture very well, it can also release it again.

The seam 8th is preferably formed from a technical textile. For example, an aramid fiber material can be provided for this purpose.

Furthermore, the sealing element can have fastening clips for a suitable fastening, for example on an appliance door 30th exhibit. Preferably the fastening clips are 30th each along the main extension H with a mutual spacing on the tube element protrusion 10 attached, for example by a clamp connection. The fastening clips 30th can for example consist of stainless steel.

The sealing element can be provided with an impregnation. A food-compliant impregnation is particularly suitable for this.

The sealing element is particularly suitable for use in oven technology or in heating technology, for example in an oven or fireplace. For example, gaps or slits in a muffle area can preferably be sealed in this way.

1. (a) Bereitstellen des Schlauchelements 2;
2. (b) Bereitstellen des länglichen Federelements 4;
3. (c) Biegen des Schlauchelements 2 um seine Haupterstreckung H derart, dass es den, durch die zwei parallele Lagen 22, 24 seiner Wand gebildeten, gebogenen Bereich 6 aufweist und Anordnen des Federelements 4 in dem gebogenen Bereich;
4. (d) Bilden der Naht 8 entlang der Haupterstreckung H des Schlauchelements 2, durch die die zwei Lagen 22, 24 so miteinander verbunden sind, dass sie in dem normalen Querschnitt betrachtet das Federelement 4 jeweils umgreifen, derart, dass mit Bezug auf die Naht 8 auf einer dem Federelement 4 gegenüberliegenden Seite durch einen Teil des Schlauchelements der Schlauchelement-Überstand 10 gebildet ist.

The following steps can be used to manufacture the sealing element:

1. (a) Providing the hose element 2 ;
2. (b) providing the elongated spring element 4th ;
3. (c) bending the hose member 2 around its main extension H in such a way that it passes through the two parallel layers 22nd , 24 its wall formed, curved area 6th having and arranging the spring element 4th in the bent area;
4. (d) forming the seam 8th along the main extension H of the hose element 2 through which the two layers 22nd , 24 are connected to one another in such a way that, viewed in the normal cross-section, the spring element 4th each grip around in such a way that with respect to the seam 8th on one of the spring element 4th opposite side through part of the hose element of the hose element protrusion 10 is formed.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102017200681 A1 [0002]

Claims (10)

Sealing element, in particular for sealing an oven or fireplace door, having a hose element (2) which is formed by a wall with a wall thickness (d); an elongated spring element (4); wherein the hose element (2) is bent around its main extension (H) in such a way that it has a bent area (6) formed by two parallel layers (22, 24) of its wall, the spring element (4) in the bent area (6) is arranged; and a seam (8) formed along the main extension (H) of the hose element (2), by means of which the two layers (22, 24) are connected to one another in such a way that, viewed in a normal cross-section, they encompass the spring element (4), with reference to the seam (8) on a side opposite the spring element (4), a tube element protrusion (10) is formed by part of the tube element (2). Sealing element according to Claim 1 , in which the part of the hose element (2) by which the hose element protrusion (10) is formed is at least 10% of the total hose element (2) when viewed in normal cross-section, preferably at least 20%, particularly preferably at least 25%. Sealing element according to Claim 1 or 2 , in which the tube element protrusion (10) is formed by two partial areas (12, 14) of the tube element (2), which are only connected to one another by the seam (8). Sealing element according to Claim 3 , in which the two sub-areas (12, 14) differ in their sizes by less than 20%. Sealing element according to one of the preceding claims, in which the spring element (4) has the shape of a hose. Sealing element according to one of the preceding claims, in which the spring element (4) has a wire, in particular consists of a wire. Sealing element according to Claim 6 , in which the wire is made of stainless steel or comprises stainless steel. Sealing element according to one of the preceding claims, in which the spring element (4) is braided or knitted. Sealing element according to one of the preceding claims, in which the hose element (2) is braided or knitted. Sealing element according to one of the preceding claims, in which the hose element (2) consists of a textile glass, in particular glass silk and / or a basalt fiber.

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