DE102011076100A1 - Vacuum insulation panel, refrigeration device with such a vacuum insulation panel and associated method for the production - Google Patents

Abstract

The invention relates to a vacuum insulation panel for a refrigeration device, in particular a household refrigeration device, comprising at least one heat-insulating support body (1) and an airtight outer skin surrounding the support body (1), in which the support body (1) has at least two sections (2, 3, 4, 5) different density. The invention also relates to a refrigeration device, in particular a household refrigeration device, comprising a heat-insulated inner container with side walls forming a storage space for refrigerated goods, a door leaf mounted on the refrigeration device for opening and closing an opening level of the storage space, which refrigeration device has at least one vacuum insulation panel according to the invention. The invention also relates to a related method for producing a support body (1).

Description

The invention also relates to a refrigeration appliance, in particular household refrigerating appliance, comprising a thermally insulated, a storage space for refrigerated goods forming inner container with side walls, one for opening and closing an opening plane of the storage space door leaf mounted on the refrigeration device. The invention also relates to an associated method for producing such a vacuum insulation panel.

The DE 298 11 136 U1 describes a Vakuumisolationspaneel for use in refrigerators, cold stores, refrigerated vehicles or mobile coolers consisting of a gas and water vapor-tight envelope and housed in the envelope filling material low thermal conductivity, wherein after evacuation, the enclosure is closed, characterized in that the filling material is a mixture of at least two different, suitable as filler material is used.

The object of the invention is to provide a vacuum insulation panel, in particular for vacuum insulation in refrigerators, whose properties are improved, and to provide a method for producing such a vacuum insulation panel.

A refrigeration appliance is understood in particular to be a household refrigeration appliance, that is to say a refrigeration appliance used for household purposes or possibly even in the gastronomy sector, and in particular for storing food and / or beverages in household quantities at specific temperatures, such as, for example, a refrigerator, a freezer , a fridge freezer, a freezer or a wine storage cabinet.

The object is achieved by a vacuum insulation panel for a refrigeration device, comprising at least one heat-insulating support body and a surrounding the support body air-tight outer skin, wherein the support body has at least two sections of different density.

The object is also achieved by a refrigerator, in particular household refrigeration appliance, comprising a thermally insulated, a storage space for refrigerated goods forming inner container with side walls, a door for opening and closing an opening plane of the storage room on the refrigerator mounted door leaf, which refrigeration a vacuum insulation panel with at least one heat-insulating support body and a The support body enclosing airtight outer skin, wherein the support body has at least two sections of different density.

According to the invention, the properties of the support body of the vacuum insulation panel can be optimized by different densities. These properties are e.g. Strength, dimensional stability and heat insulation. Different densities can be achieved by different materials and / or material combinations. To improve strength and / or dimensional stability, a high density of the respective material can be formed in desired regions. In areas of low strength and dimensional stability requirements, the density may be reduced to achieve, for example, improved thermal insulation properties.

In all embodiments, the support body may have a first portion having a first density and a second portion having a second density different from the first density of the first portion. This means that the first portion of the support body has a different density than the second portion or one or more further portions of the support body.

The second portion of the support body may have a density that is less than the density of the first portion. The at least one support body can have at least one first section with high density, in particular high dimensional stability and / or strength, and at least one second section with lower density, in particular high heat insulation capability, in contrast to the at least one first section. In general, a support body will have a correspondingly higher strength and / or higher dimensional stability due to a higher density portion. In general, a support body will have a correspondingly lower strength and / or smaller dimensional stability due to a lower density portion, but will have a higher heat insulating capability.

The at least one first section may form an edge region of the at least one support body. As a result, this edge region can have increased strength and / or increased dimensional stability.

The second portion of the support body may enclose the first portion of the support body.

The second section, in particular at least two second sections of the support body, can sandwich the first section or the first section can be arranged between two second sections.

The at least one first portion and the at least one second portion may be joined together by joining. Such joining can be, for example, filling, pressing / pressing and / or gluing.

In all embodiments according to the invention, the at least one supporting body can form a vacuum insulation panel of the refrigerating appliance. Due to its different densities, the support body can simultaneously form a thermal insulation and a component with increased strength.

In all embodiments according to the invention, the at least one support body can also form a vacuum body with a complex geometry of the refrigeration appliance. As a result, thermal insulation is possible even in places of high strength. Under complex geometry support bodies can be understood that have a different basic geometric shapes, such as cube or cuboid shape.

The object is also achieved by a method for producing a support body for a refrigeration device described above. The method comprises the following method steps: inserting material into a tool; Creating the first section by pressing with high pressure by means of a tool; Inserting further or other material; and producing the support body by forming the second, third or fourth section by pressing with reduced pressure with the same or a different tool.

In other words, it can be achieved by repeated pressing with different pressures that the support body has different densities. The same or different material can also be used in combination with other materials. Thus, for example, when using a silica mixture in the edge region, an increased strength can additionally be achieved by increasing a fiber content.

When inserting material into a tool also previously created individual sections, sections with different density or materials, material combinations or / and several individual support body can be inserted, in which case a joining of this takes place to a support body. Thus, a variety of different components, in particular three-dimensional component, even with complex geometry, can be produced.

Joining can be carried out, for example, by filling, pressing / pressing in and / or gluing.

The shaping of the first high density section can be done by high pressures, such as pressing.

Shaping the second, third and fourth portions of the reduced density support members may be accomplished at low pressures by, for example, shaking, die forming or manual.

Summarized and in other words can thus result from the invention, inter alia, a refrigeration device, are produced in which support body for the vacuum insulation with deliberately controlled density. A different density or different materials / material combinations within a support body allows the optimization of support bodies in terms of insulation or strength.

These support bodies can be used for example in vacuum insulation panels or complex vacuum bodies with three-dimensional geometry.

The invention may include optimization of the properties of a support body. This can be achieved by desired different densities within the body. In this case, for example, be carried out in the outer region of the support body with increased density in order to improve the strength and dimensional stability. In areas with lower demands on strength and dimensional stability, the density can be reduced to achieve, for example, improved insulation properties.

Alternatively, different materials / material combinations can be used to optimize the properties. Thus, e.g. be increased when using a silica mixture in the edge region in favor of increased strength of the fiber content.

The use of these optimization potentials can be significant, especially for complex shaped support bodies.

• – mehrfaches Pressen. Dabei wird beispielsweise Material eingelegt und mit hohem Druck gepresst, um eine hohe Festigkeit im Randbereich zu erhalten. Im Anschluss wird ein weiteres oder anderes Material eingelegt und mit dem gleichen oder einem anderen Werkzeug mit vermindertem Druck gepresst.
• – Fügen von zuvor gepressten Stützkörpern mit unterschiedlicher Dichte bzw. Materialien/Materialkombinationen.

Manufacturing technology, the support body can be prepared for example by the following methods:

• - multiple pressing. In this case, for example, material is inserted and pressed at high pressure to obtain a high strength in the edge region. Subsequently, another or other material is inserted and with the same or Another tool pressed under reduced pressure.
• - Joining previously pressed support bodies with different density or materials / material combinations.

The optimization of the support body in terms of strength and insulation is achieved by the intentional control of the density or by different materials, material combinations.

Further features and advantages will become apparent from the following description of an embodiment with reference to the accompanying figures. Concrete features of this embodiment may represent general features of the invention.

Show it:

1a ... 3b schematic cross sections of support bodies according to the invention with angles;

4a ... 4b schematic cross-sections of supporting bodies according to the invention with vaults; and

5a ... 6b schematic cross sections of support bodies according to the invention with projections and recesses.

1a shows a schematic cross section of a support body 1 a vacuum insulation panel consisting of three sections. A first section 2 is made of a material of high density and forms with its cross section in the form of a so-called hat profile an outdoor area with high strength properties and high dimensional stability. The first paragraph 2 has dull interior angles 6 and dull outside angles 2 on. A second section 3 with a rectangular cross section closes the cross section of the first section 1 so that one inside, between the insides of the first section 2 and the second section 3 formed third section 4 is set with a trapezoidal cross-section. The second section 2 has a lower density than the first section 2 on. The third section 3 With the lowest dimensional and strength requirements, it has the lowest density but the highest thermal insulation properties.

In 1b is another support body 1 with a complementary profile to the cross section of the support body 1 to 1a shown. Here is an outer area corresponding to that of the support body according to 1a with high strength and dimensional stability characteristics as the first section 2 educated. The second section 3 encloses the other side of the first section 2 and has lower density but higher heat insulating properties. A third section 4 is not planned here.

A supporting body 1 with a T-shaped cross-section is in 2a shown. The T-shaped cross section has right internal angles 8th and right outside angles 9 on. A second section 3 with high heat insulation properties and low density but low strength and dimensional stability is of a circumferential first section 2 surround. The first paragraph 2 has a high density and high strength and dimensional stability properties.

In 2 B is a U-shaped cross section of a support body 1 shown. Here, the interior of the U is formed with high dimensional stability and rigidity and therefore with the first section 2 high density formed. A second section 3 lower density and strength in U-shape surrounds the first section 2 , Again, the first section 2 right interior angle 8th and right outside angles 9 on.

For sharp interior angles 10 and sharp outside angles 11 demonstrate 3a and 3b exemplary cross sections of support bodies 1 The respective areas of high dimensional stability and strength are from a first section 2 high density formed. One from the first section 2 for the most part surrounded interior is with a second section 3 filled in lower density. The second section 3 has a high heat insulating property.

In 3b is the one from the first section 2 formed interior with a rectangular second section 3 closed and with a third section 4 refilled.

Curved and curved outer contours can also be produced, as in 4a and 4b with schematic cross sections of supporting bodies 1 is shown. 4a show a support body 1 with a vault 12 to the outside, which can also be called a convex curvature and is applied to a rectangular plate with cutout. A first section 2 high density and high dimensional stability and strength encloses an interior area with a second section 3 less density but higher thermal insulation property is filled.

4b shows a support body 1 with an inside curvature 13 in which only the side areas have high dimensional stability and strength and accordingly with a first section 2 are formed. The first paragraph 2 is on a second section 3 applied less strength. The second section 3 but has a lower density and higher thermal insulation properties.

The 5a to 6b show schematic cross-sections of supporting bodies according to the invention 1 with projections 14 . 16 and recesses 15 . 17 ,

In these shown supporting bodies 1 are the tabs 64 and 17 and the recesses 15 and 17 with related areas as first sections 2 designed with high density, high strength and high dimensional stability. These first sections 2 are on second sections 3 applied lower density. And the second sections 3 are with underlying fourth sections 5 connected. The fourth sections 5 Here, for example, have a combination of different materials and can be, for example, a lamination of metal.

In 5a and 5b are the tabs 14 and recesses 15 formed with parabolic cross-sections. In contrast, have the angular projections 16 and 17 the support body 1 to 6a and 6b right-angled cross-sections.

The different sections 2 . 3 . 4 . 5 the support body have different densities and may also consist of different materials / material combinations. The first paragraph 2 For example, a silica blend may be provided with an increased fiber content for increased strength.

On the basis of the examples shown it becomes clear that a use of the optimization potentials, in particular for support bodies 1 interesting with complex geometry.

A possible method for producing such support body 1 can be for example the following:
Material is loaded into a tool and high pressure to create the first section 2 pressed. This is a high strength in the edge region of the support body 1 generated.

Following this, further or other material for the second, third or fourth section 3 . 4 . 5 , depending on the structure of the support body 1 , loaded and pressed with the same or another tool with reduced pressure.

In this way, further sections can be produced by multiple pressing, whereby the support body 1 will be produced.

In another method, individual sections or / and multiple sections, e.g. according to the above method, prepared separately. Then a joining of the previously pressed support body with different density or materials, material combinations. Joining takes place, for example, by filling, pressing, pressing in and / or gluing.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• DE 29811136 U1 [0002]

Claims (13)

Vacuum insulation panel for a refrigeration appliance, in particular household refrigerating appliance, comprising at least one heat-insulating supporting body ( 1 ) and a supporting body ( 1 ) enclosing airtight outer skin, characterized in that the supporting body ( 1 ) at least two sections ( 2 . 3 . 4 . 5 ) of different density. Vakuumisolationspaneel according to claim 1, characterized in that the supporting body ( 1 ) a first section ( 2 ) with a first density and a second portion ( 3 . 4 . 5 ) with a second, from the first density of the first section ( 2 ) has different density. Vacuum insulation panel according to claim 2, characterized in that the second section ( 3 . 4 . 5 ) of the supporting body ( 1 ) has a density which is less than the density of the first section ( 2 ). Vacuum insulation panel according to claim 2 or 3, characterized in that the at least one first section ( 2 ) an edge region of the support body ( 1 ). Vacuum insulation panel according to one of claims 1 to 4, characterized in that the second section ( 3 . 4 . 5 ) of the supporting body ( 1 ) the first section ( 2 ) encloses. Vacuum insulation panel according to one of claims 1 to 5, characterized in that the second section ( 3 . 4 . 5 ), in particular at least two second sections ( 3 . 4 . 5 ) of the supporting body ( 1 ) the first section ( 2 ) or the first section ( 2 ) between two second sections ( 3 . 4 . 5 ) is arranged. Vakuumisolationspaneel according to one of claims 1 to 6, characterized in that the at least one first section ( 2 ) and the at least one second section ( 3 . 4 . 5 ) are joined together by joining. Vakuumisolationspaneel according to one of claims 1 to 7, characterized in that the at least one support body ( 1 ) Part of a vacuum insulation panel of the refrigerator is. Vakuumisolationspaneel according to one of claims 1 to 8, characterized in that the at least one support body ( 1 ) forms a vacuum body with complex geometry of the refrigerator. Refrigerating appliance, in particular household refrigerating appliance, comprising a thermally insulated, a storage space for refrigerated goods forming inner container with side walls, a door for opening and closing an opening plane of the storage room on the refrigerator mounted door leaf, and at least one Vakuumisolationspaneel according to any one of claims 1 to 9, Method for producing a supporting body ( 1 ) of a vacuum insulation panel for a refrigerator according to one of claims 1 to 10, characterized by the method steps: - inserting material into a tool; - Creating the first section ( 2 ) by pressing with high pressure by means of a tool; - insertion of further or other material; and - producing the supporting body ( 1 ) by creating the second, third or fourth section ( 3 . 4 . 5 ) by pressing with reduced pressure with the same or another tool. A method according to claim 11, characterized in that when inserting material into a tool previously separately created individual sections, sections with different density or materials and / or material combinations or / and a plurality of individual support body ( 1 ) are inserted, wherein thereafter joining this to a support body ( 1 ) he follows. A method according to claim 12, characterized in that a joining by filling, pressing, pressing and / or gluing is performed.

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