EP2783174A2

EP2783174A2 - Heat insulation housing for a refrigerating device

Info

Publication number: EP2783174A2
Application number: EP12790849.9A
Authority: EP
Inventors: Marco Giacchi; Matthias Hopf
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2011-11-24
Filing date: 2012-11-15
Publication date: 2014-10-01
Also published as: DE102011087036A1; CN103975208A; WO2013076002A3; CN103975208B; WO2013076002A2

Abstract

The invention relates to a heat insulation housing for a refrigerating device, in particular a household refrigerating device, comprising an interior wall (3) defining a cooling chamber, an exterior wall (5), a wall intermediate chamber (9) which is filled with a heat insulating material (11) and in which a vacuum insulating panel (13) which can be positioned in the wall intermediate chamber (9) by means of a holding element (19), is arranged. According to the invention, the holding element (19) comprises holding brackets (15, 16) which surround the vacuum insulation panel (13) in an annular manner and by means of which the vacuum insulation panel (13) can be secured to the inner and/or outer wall (3, 5).

Description

Heat insulation housing for a refrigeration device

The invention relates to a heat insulation housing for a refrigeration appliance, in particular domestic refrigeration appliance, according to the preamble of patent claim 1 and a vacuum insulation panel for such a heat insulating housing according to claim 10.

In the manufacture of a refrigerator whose double-walled housing body is placed in a Schäumungsanlage in which the still empty wall space of the housing body is filled with heat and / or pressurization with a liquid starting component of a Wärmeisolierschaumes which foams and hardens therein. To increase the heat insulating effect, a vacuum insulation panel can be introduced before the foaming process in the still empty wall space. Its inherent rigidity is usually insufficient to withstand the foaming process without changing the shape and position. For this reason, the vacuum insulation panel may be supported via holding elements on the inner wall or the outer wall of the housing body.

From DE 10 2009 060 079 A1, such a heat insulation housing is known, in whose device body a vacuum insulation panel is used. This is positioned in the correct position with the help of spacers. The spacers may be formed on the inner wall or the outer wall of the housing body. The spacers are provided in large numbers distributed over the entire side wall surface. In addition, they are mounting technology consuming mounted on the inner wall and / or the outer wall, for example by screwing or gluing. Alternatively, the spacers can also be formed directly as bulges in the inner wall or the outer wall. However, this greatly affects the appearance of the case body. With such spacers, there is the danger that the deformation forces exerted on the vacuum insulation panel during the foaming process lead to distortions in the vacuum insulation panel. This can lead to a change in position and / or shape of the vacuum insulation panel. This can turn into one lead to detrimental bulge or bulging of the outer wall and / or the inner wall.

The object of the invention is to provide a heat insulating housing in which the vacuum insulation panel is arranged in a simple manner dimensionally stable and in the correct position in the wall space.

The object is solved by the features of claim 1 or claim 10. Preferred embodiments of the invention are disclosed in the subclaims.

The invention relates to a heat insulation housing with a, a cooling space bounding inner wall, an outer wall and a wall space, which is filled with a heat insulating material and in which a vacuum insulation panel is arranged. The invention of the fact that a only one-sided support of the vacuum insulation panel between a panel side surface and the inner wall or the outer wall does not increase the inherent stiffness of the vacuum insulation panel to such an extent that during the foaming process, which takes place under pressure and heat, distortions or Deformations of the vacuum insulation panel can not be sufficiently reliably avoided. Against this background, according to the characterizing part of patent claim 1, the vacuum insulation panel is not only fixed on one side to the inner / outer wall, but the vacuum insulation panel is enclosed by means of retaining clips closed ring. The vacuum insulation panel is also attached via the headband on the inner and / or outer wall. In this way, both side surfaces of the vacuum insulation panel are enclosed like a cage, whereby shape and / or position changes of the vacuum insulation panel during foaming can be better avoided. Accordingly, a bulging or a sign of these deformations on the outer wall can be prevented, which can usually be made of a very thin sheet metal material.

The heat insulation housing can be used in a refrigeration device. A refrigeration device is understood in particular to mean a domestic refrigeration appliance, that is to say a refrigeration appliance which is used for household management in households or possibly also in the gastronomy sector, and in particular for this purpose foods and / or drinks are used in store at normal temperatures at certain temperatures, such as a refrigerator, a freezer, a fridge freezer, a freezer or a wine storage cabinet.

Preferably, the headband in the installation position in a horizontal plane surround the vacuum insulation panel. Preferably, the vacuum insulation panel can be arranged between two retaining clips. The vacuum insulation panel can be clamped under the action of clamping forces between the two brackets, whereby the dimensional stability of the vacuum insulation panel is increased. It is favorable in terms of installation, if the headband and the vacuum insulation panel can already be assembled separately outside the wall gap to form a pre-assembly unit. The pre-assembly unit consisting of the retaining clips and the vacuum insulation panel is then inserted into the wall gap in a further production step before the foaming process. To simplify the assembly of the headband with the vacuum insulation panel, the headband can be made adjustable to each other. Thus, in an open position, the vacuum insulation panel can be easily inserted between the two brackets. Subsequently, the headband can be brought together to form a closed position in which the vacuum insulation panel is surrounded by the retaining clips annular. Additional spring elements may be provided between the retaining clips and the vacuum insulation panel in order to act elastically on the clamped vacuum insulation panel with the above-mentioned tension forces. According to a variant, the two headband may be materially and / or integrally connected to each other via a film hinge. The film hinge forms a folding axis, around which the two brackets can be folded. To secure the closed position, the headband can be connected at their ends remote from the hinge, for example via any connector. As an alternative to such a one-piece design, the two retaining clips can also be realized as separate components, which can likewise be joined together, for example via plug connections. Such separate headband may preferably be designed as a common part in order to reduce the production cost. As mentioned above, the two brackets cage the vacuum insulation panel, whereby its inherent rigidity is increased. As a result, the adverse changes in shape and position during the foaming process can be prevented. Moreover, the following aspect of the invention, which can be seen as an alternative and / or in addition to the features mentioned above, is based on the finding that the spacers known from the prior art provide a force path during the foaming process. Deformation forces can be transmitted into the outer wall during the foaming process by bridging the free gap between the vacuum insulation panel and the outer wall, which can disadvantageously deform during the foaming process. Against this background, according to the characterizing part of claim 5, such spacers between vacuum insulation panel and the outer wall / inner wall completely omitted, whereby a free gap is maintained. Rather, the vacuum insulation panel is attached to the angled edge strips of the outer wall / inner wall. The edge strips are connected in the assembly position of the housing with other, adjacent wall parts, such as floor, ceiling or rear wall. Preferably, the vacuum insulation panel with the interposition of the above-mentioned headband is supported on the edge strips of the outer wall.

With such a special holder, an immediate force path between the vacuum insulation panel and the outer wall is avoided. Rather, the deformation forces acting during the foaming process are initiated by the heat insulation panel via the retaining bracket in the angled edge strips, while the outer wall is not acted upon by the deformation forces of the vacuum insulation panel. The advantageous embodiments and / or further developments of the invention explained above and / or reproduced in the dependent claims can be used individually or else in any desired combination with one another, for example in the case of clear dependencies or incompatible alternatives. The invention and its advantageous embodiments and further developments and advantages thereof are explained in more detail below with reference to drawings.

Show it: 1 is a perspective view of a heat insulating housing of a

Refrigeration appliance with omitted appliance door;

Fig. 2 is an enlarged view of a sectional view taken along the

Cutting plane l-l;

Figs. 3 and 4 are views showing the assembly of the vacuum insulation panel in the

Illustrate wall space of the heat insulation housing;

5 shows a perspective partial view two mutually separate headband;

6 to 8 are schematic diagrams illustrating the installation of a vacuum insulation panel according to the second embodiment.

The invention is described below in application to a housing 1 of a freezer or refrigerator, which is shown in Fig. 1 in a perspective view without the appliance door. The housing 1 has as inner wall part 3 a plastic inner container and as outer wall parts in each case side walls 5 made of a stainless steel sheet with low material thickness and a top wall 7 made of cardboard or plastic. The bottom wall, not shown, and the rear wall may also be made of cardboard or plastic. The wall gap 9 (FIG. 2) formed between the inner container 3 and the outer wall parts 5, 7 is filled with a heat insulation foam 11. The heat insulation foam 1 is introduced in the production of the housing 1 in a foaming step in the still empty space 9 of the housing 1. For this purpose, a liquid starting component of the Wärmeisolierschaumes 1 1 under greater pressure and under heat, not shown foaming valve in the still empty wall space 9 over filled.

To increase the thermal insulation effect, a large-area heat-insulating panel 13 (shown by broken lines in FIG. 1) is arranged in the wall gap 9 in accordance with the figures in the area of the left and right side walls 5. The vacuum insulation panel 13 is placed in the still empty wall gap 9 before carrying out the foaming process. For positionally accurate and positionally secure arrangement in the wall gap 9 a consisting of brackets 15, 16 holding member 19 is provided. The two brackets 15, 16 are shown in FIGS. 1 to 5 as separate from each other components which can be joined together at their ends via a locking connection 21 described later, to form an annularly closed gap 23 (Figures 2 and 3), in which the vacuum insulation panel 13 is arranged. The latching partners of the respective latching connection 21 between the two retaining clips 15, 16 consist of a latching channel 25, in which a latching element 27 can be inserted. At the opposite contact surfaces between the inner wall of the latching channel 25 and the latching element 27 corresponding sawtooth profiles are formed. Depending on their pitches, therefore, the two brackets 15, 16 for a fine adjustment vacuum insulation panels 13 record different gap width.

As is apparent from FIGS. 2 to 4, the two brackets 15, 16 are designed as identical parts. Each of the identical parts has a latching channel 25 at one end and a latching element 27 at the opposite end. For the preparation of the latching connection 21, the two identical parts 15, 16 are arranged on the envelope rotated by 180 ° to each other.

The ends of the headband 15, 16 are each extended on both sides with locking pin 29. In Fig. 2 of the four locking lugs 29 shown are the two locking pin 29 of the outer wall 5 facing retaining bracket 15 is engaged in associated recesses 31 of the two lateral edge strips 33 of the outer wall 5. According to FIG. 2, the outer wall 5 is extended at respectively opposite housing edges 35 with the two edge strips 33, which are angled at 90 °. The edge strips 33 are double-walled with a U-shaped inwardly angled inner leg 37 and an outer leg 38 constructed. The front edge strip 33 in FIG. 2 has a step-shaped connection geometry on the outer leg 38, in which an inner edge edge strip 39 is glued flush with the surface. The outer leg 38 of the rear edge strip 33 in FIG. 2, on the other hand, is designed without such a step-shaped connection profile and glued to the rear wall 6. At the two mutually facing inner legs 37 of the outer wall edge strips 33, the above-mentioned recesses 31 are formed.

The installation of the vacuum insulation panel 13 in the wall gap 9 will be described with reference to FIGS. 3 and 4. Accordingly, according to FIG. 3, the two Bracket 15, 16 first assembled outside the wall gap 9 with the vacuum insulation panel 13 to a pre-assembly unit V. The two brackets 15, 16 are clamped together via the snap-in joints 21 so that they exert a certain biasing force F _v on the zwischengeklemmte vacuum insulation panel 13. The vacuum insulation panel 13 is thus clamped between the two brackets 15, 16, whereby the inherent rigidity of the pre-assembly V is advantageously increased.

Subsequently, the preassembling unit V is mounted between the two edge strips 33 of the outer wall 5 in such a way that the edge strips 33 are first slightly elastically widened by the two latching pins 29 of the outer wall 5 facing holding bracket 15 under construction of a restoring force. When retracting the locking pin 29 in the recesses 31 of the two edge strips 33, the restoring forces can be at least partially reduced again. As a result, a secure mounting of the vacuum insulation panel 13 in the wall gap 9 is achieved. The pre-assembly unit V is thus arranged at a distance from the outer wall 5 via a free gap s (FIG. 4).

Subsequently, the outer wall 5 with the vacuum insulation panel 13 fixed therein is assembled with the inner container 3 to close the mounting space 9 in a foam-tight manner. In the subsequent foaming process, the starting component of the Wärmeisolierschaumes 1 1 is filled into the still empty wall space 9 with great pressure and great heat. As a result, in particular the vacuum insulation panel 13 clamped between the retaining clips 15, 16 is subjected to deformation forces which can lead to a change in shape and / or position of the vacuum insulation panel 13. The introduced during Aufschäumvorgang in the vacuum insulation panel 13 deformation forces according to the invention alone on the edge strips 33 in the inner and outer walls 3, 5 introduced. The resulting force path K is indicated in FIG. 4 with arrows. It follows that the gap s between the pre-assembly unit V and the outer wall 5 is bridged by the force path K according to the invention force-free. Even if the vacuum insulation panel 13 deforms during foaming, therefore, the outer wall 5 is not correspondingly bulged. In Fig. 5, the two brackets 15, 16 are still shown separated from each other in a perspective partial view. Accordingly, the two brackets 15, 16 on the vacuum insulation panel 13 side facing each transverse ribs 41 which are in the closed state of the headband 15, 16 in line contact with the vacuum insulation panel 13 and thereby provide increased pressurization. On the side facing away from the vacuum insulation panel 13, on the other hand, the retaining clips 15, 16 are stiffened with an additional truss structure 43 in order to be able to exert the above-mentioned pretensioning force F _v on the vacuum insulation panel 13.

In the following Figs. 6 to 8, a second embodiment is shown, in which, in contrast to the preceding figures, the two brackets 15, 16 are not separate components, but rather are of the same material and integrally connected via a film hinge 45. The film hinge 45 defines a hinged axis about which the two brackets 15, 16 are mutually adjustable. 6, the two brackets 15, 16 are shown in their open position, in which on a two brackets 15, 16, the vacuum insulation panel 13 can be placed. On the side of the retaining clips 15, 16 which can be brought into contact with the vacuum insulation panel 13, respective spring elements 47 are arranged with which a predefined prestressing force can be exerted on the vacuum insulation panel 13. At the hinge-distal end of the two brackets 15, 16 each cooperating connector partners can be formed, which secure the headband 15, 16 in the closed position. In the closed state, the two retaining brackets 15, 16 surround the vacuum insulation panel 13 in a closed annular manner. The pre-assembly unit V thus formed can be latched into the two opposite edge strips 33 of the outer wall 5 with the latching pins 29 protruding on the outside from the retaining clips 15, 16. Subsequently, the outer wall 5 can be supplied together with the pre-assembly unit V latched thereto to the foaming system.

LIST OF REFERENCE NUMBERS

1 heat insulation housing

3 inner wall

5 outer wall

6 rear wall

7 ceiling wall

9 wall gap

1 1 heat insulating foam

13 vacuum insulation panel

15, 16 headband

19 holding element

21 locking connection

23 passage gap

25 detent channel

27 locking element

29 locking pins

31 recess

33 sidebar

37 inner thighs

38 outer thighs

41 ribs

43 Truss structure

45 film hinge

47 spring elements

V pre-assembly unit

K force path

Claims

Heat insulation housing for a refrigeration appliance, in particular domestic refrigeration appliance, with a cooling space bounding an inner wall (3), an outer wall (5) and a wall space (9) which is filled with a heat insulating material (1 1) and in which a vacuum insulation panel (13) is arranged , which is positionable by means of a holding element (19) in the wall space (9), characterized in that the holding element (19) retaining bracket (15, 16) which surround the vacuum insulation panel (13) annularly and on the vacuum insulation panel (13) the inner and / or outer wall (3, 5) can be fastened.

Heat insulation housing according to claim 1, characterized in that the retaining clips (15, 16) and the vacuum insulation panel (13) form a pre-assembly unit (V) which can be inserted into the wall space (9), in particular before a foaming process for introducing the heat insulation material (11 ) in the wall space (9).

Heat insulation housing according to claim 1 or 2, characterized in that the vacuum insulation panel (13) is clamped under the application of clamping forces (F _s ) between the retaining clips (15, 16).

Heat insulation housing according to claim 1, 2 or 3, characterized in that the retaining brackets (15, 16) between an open position in which the vacuum insulation panel (13) can be inserted, and a closed position are mutually adjustable, in which the vacuum insulation panel (13) of the Holding brackets (15, 16) is surrounded annularly.

Heat insulation housing, in particular according to one of the preceding claims, characterized in that the outer wall (5) on opposite housing edges (35) merges into angled edge strips (33) which are connected to the inner wall (3) and / or to other adjoining wall parts (6, 7). , such as floor, ceiling or rear wall, are connected, and that the vacuum insulation panel (13) is mounted on the edge strips (33) of the outer wall (5), in particular with the interposition of the retaining element (19).

Heat insulation housing according to one of the preceding claims, characterized in that the vacuum insulation panel (13) while maintaining a free gap (s) to the outer wall (5) and / or inner wall (3) in the wall space (9) can be mounted.

Heat insulation housing according to one of the preceding claims, characterized in that the headband (15, 16) of the same material and / or in one piece via a film hinge (45) are interconnected, or that the headband (15, 16) are connectable to each other as separate components.

Heat insulation housing according to one of the preceding claims, characterized in that upon introduction of the heat insulation material (1 1) into the wall gap (9) deformation forces act on the vacuum insulation panel (13), which via a force path (K) from the vacuum insulation panel (13) via the holding element ( 19) in the inner and / or outer wall (3, 5) are transferable.

Heat insulation housing according to claim 8, characterized in that the force path (K) for transmitting the deformation forces in the inner and / or outer wall (3, 5) alone on the edge strips (33) runs, under force-free bridging of the free gap (s ) between the vacuum insulation panel (13) and the inner and / or outer wall (3, 5).

0. Vakuumisolationspaneel for a heat insulation housing (1) according to one of the preceding claims.