EP2691705B1 - Refrigerator having a roll-bond plate - Google Patents

Description

The present invention relates to a refrigerator with a Rollbondplatine, in particular a Rollbondplatine for a refrigerant evaporator of a refrigerator.

For cooling refrigerated goods in refrigeration appliances, freely suspended refrigerant evaporators can be used, which usually have one or more refrigerant channels through which refrigerant flows. In a coiled tube evaporator, the refrigerant channels are formed by one or more coils. In a circuit board evaporator, however, the refrigerant channels are formed, for example between two interconnected metal plates.

Frequently used as refrigerant evaporator boards Rollbondplatinen. The Rollbondplatinen arise by a compression of two metal plates, which may each be formed from sheets. In this case, certain parts of the metal plates are recessed or treated with a release agent so that they can not connect there. The refrigerant passages are then formed by inflating the interconnected metal blanks.

However, due to the low material thickness of usually up to 1.35 mm, known roll-bonded blanks often do not have sufficiently high stability against bending or bending. In the case of refrigerant evaporator circuit boards, which are arranged freely suspended in an interior of a refrigerator, however, this stability is particularly important.

The stability of a Rollbondplatine can be increased by so-called drip edges. These prevent lacquer droplets from forming on an adhesive side during coating of the rollerboard, which impair the flatness of the rollerboard and thereby the adhesive adhesion. However, such dripping edges are visible in the interior of the refrigerator Rollbondplatinen for the user and are perceived as disturbing.

Another embodiment of Rollbondplatinen is a away from the interior of the refrigerator, backwards, projecting fold. However, this fold takes up a lot of space to the rear. At the fold can drop especially in the case of internal refrigerant evaporators to the adjacent container wall drop. These drops can freeze and lead to ice accumulation. Furthermore, a special bending tool is required to produce such a fold.

The publication EP 1 094 291 A2 shows a heat exchanger comprising a plate assembly. EP 1094291 A2 discloses a refrigerator according to the preamble of claim 1.

The patent US 2,827,774 shows a Rollbondplatine having a C-shape in cross-section to accommodate refrigerated goods can.

The patent US 2,107,285 shows an evaporator, which has a U-shape in cross section to accommodate refrigerated goods can.

Against this background, it is an object of the present invention to provide an improved refrigerator with a refrigerant evaporator formed from two interconnected metal plates.

This object is solved by the features of independent claim 1. Further advantageous embodiments are specified in the subclaims.

In one aspect, the invention relates to a refrigerator having a refrigerant evaporator formed of two interconnected metal plates with a first side and a second side. A core portion of the two interconnected metal blanks is bounded by bending edges formed by bending the two interconnected metal blanks toward the second side. The two interconnected metal plates offer low bending costs sufficient bending stability and take up a small space.

The refrigerant evaporator of two interconnected metal blanks can be prepared, for example, by the Rollbond method or by the Z-Bond method.

The two interconnected metal boards may be arranged in an interior of the refrigerator such that the second side facing a wall, for example, to the rear wall of the interior. As a result, the bending edges are facing away from a viewing direction in the direction of the interior and invisible to a user of the refrigeration device, in particular when an open refrigerator door. The two interconnected metal blanks preferably comprise at least two bending edges, which may be straight.

The refrigeration device can be a household refrigeration appliance according to one embodiment. Household refrigeration appliance is understood in particular to mean a refrigeration appliance that is used for household purposes or in the catering sector, and in particular serves to store food and / or drinks at specific temperatures, such as, for example, a refrigerator, a freezer, a refrigerated freezer, a freezer or a freezer wine fridge.

The two interconnected metal blanks offer good bending stability and edge strength at low manufacturing costs for the bending edges. The stabilization by means of the bending edges is realized with a small space. The optics of the first page, which is intended to be a visible side facing a viewer, is thereby improved, since the bends on this page are visually only slightly perceptible.

In one embodiment, the two interconnected metal blanks form a rollbond board.

In one embodiment, four rectilinear bending edges defining a core portion of the two interconnected metal blanks are formed by bending the two interconnected metal blanks toward the second side. In this case, a short leg of about twice the thickness of the two interconnected metal plates are deformed to the rear. This results in a rounding from the visible side to the rear, whereby an overall higher edge strength of the two interconnected metal blanks is achieved.

According to one embodiment, at least one of the bending edges forms a drip edge. Thus, the bending edges contribute to the stabilization of the two interconnected metal blanks and at the same time prevent water accumulation at the drip edge.

According to one embodiment, at least some of the bending edges are spaced apart in their longitudinal direction by bending edges free areas, ie substantially flat, non-bent areas. These areas are preferred in, for example, rectangular interconnected metal blanks arranged the corner areas. The bending edges free areas allow the simplified attachment of fasteners on the board, since it is then even there. For example, holes may be provided there for attachment of the two interconnected metal blanks. Furthermore, the bending edges separate free areas of the individual bending edges, which is advantageous in terms of the bending process, since the differently aligned bending radii do not meet directly on each other.

According to one embodiment, the material thickness of the two interconnected metal blanks is for example between 0.8 and 1.5 mm. This thickness range allows a good compromise between realizable flexural rigidity of the resulting Rollbondplatine and a low material usage, which causes economic advantages in terms of manufacturing costs.

According to a further embodiment, in the region of the bending edges of the two interconnected metal plates, for example, with a height of at least 1.5 times to 2.5 times the average material thickness of the two interconnected metal plates from the core area of the second side. As a result, a sufficient stabilization of the two interconnected metal blanks is created without condensate can accumulate in the region of the bending edges, as can be done at more projecting bending edges.

According to one embodiment, the two interconnected metal plates are bent in the region of the bending edges by a bending angle α of 70 to 110 degrees. This bend angle range allows good stabilization of the two interconnected metal blanks against flexing. An angle α greater than 90 degrees causes the bending edge to appear visually small. An angle α of less than 90 degrees offers the advantage that condensation water can run off and drip off well.

According to one embodiment, the bending edges have, for example, a bending radius r of 0.5 to 5 mm. In this case, a small bending radius of 0.5 mm, for example, causes a particularly great stabilization of the two interconnected metal blanks against bending. A large bending radius, for example of 5 mm allows greater elasticity of the two interconnected metal blanks against kinking. According to one embodiment, the bending radius r transitions into a substantially flat bending edge section. The planar bending edge portion provides further stabilization of the bending edge portion against bending. The flexural rigidity of the two interconnected metal blanks is thereby further increased. Compared to a rollerboard only with a bending edge portion radius, the embodiment with an additional, planar bending edge portion is more rigid.

According to one embodiment, the first side is coated, in particular painted. This additionally protects the first page.

According to the invention, the two interconnected metal plates in such an interior of the refrigerator, in particular close to the wall, arranged such that the first side faces the interior. As a result, the bending edges of the two interconnected metal plates are aligned so that they are hardly perceived by a user of the interior, since the two interconnected metal plates are bent away from the interior. Furthermore, there is no danger to the user when touching the two interconnected metal blanks, for example by contact with a degree at one edge of the two interconnected metal blanks.

According to the invention, the two interconnected metal plates are arranged near a first wall of the refrigeration device, which is arranged opposite a closable opening in a second wall of the refrigeration device. The opening allows access to the refrigerator. In this case, the grade-free visible side of the two interconnected metal plates facing the opening. Preferably, the two interconnected metal plates are arranged substantially parallel to the first wall. This results in a uniform temperature situation between the two interconnected metal blanks and the first wall, allowing efficient use of the resulting rollerboard. Due to the large distance from the second wall of the interior of the refrigerator, the interior can be largely used for cooling of objects.

According to one embodiment, the two interconnected metal plates are arranged substantially parallel to the first wall. In this case, the bending edges, for example, facing the first wall, so that they are invisible to a user of the refrigerator.

Figur 1:

eine schematische Aufsicht auf eine Rollbondplatine gemäß einer Ausführungsform;

Figur 2:

eine Schnittdarstellung der Rollbondplatine entlang der Line A-B von Fig. 1; und

Figur 3

eine schematische Schnittdarstellung eines Kältegeräts mit einer Rollbondplatine.

Further advantageous embodiments and aspects of the invention are the subject of the embodiments of the invention described below. Furthermore, the invention will be explained in more detail by means of preferred embodiments with reference to the attached figures. Show it:

FIG. 1:

a schematic plan view of a Rollbondplatine according to an embodiment;

FIG. 2:

a sectional view of the Rollbondplatine along the line AB of Fig. 1 ; and

FIG. 3

a schematic sectional view of a refrigerator with a Rollbondplatine.

In the figures, identical or functionally identical elements are provided with the same reference numerals, unless stated otherwise.

FIG. 1 shows a schematic plan view of a Rollbondplatine 1 according to one embodiment. The Rollbondplatine 1 consists of two interconnected metal plates 2, the planar core portion 7 is in the image plane of Fig.1 extends. The rollerboard 1 is substantially rectangular, but has rounded corners. Laterally, the Rollbondplatine 1 is limited, for example, at its four rectilinear sides of bending edges 3, 4, 5, 6. In this embodiment, the bending edges 3, 4, 5, 6 are spaced apart in their longitudinal direction by substantially flat, ie not bent regions 9 from each other. This avoids difficult bends in the area of intersecting bending edges. Furthermore, in these areas, the bending moment acting on the rollerboard 1 is anyway smaller than, for example, in the edge center, so that bending is less required here. The further structure of the Rollbondplatine is described below with reference to Fig. 2 explained.

FIG. 2 shows a sectional view of the Rollbondplatine 1 along the line AB of Fig. 1 , An in Fig. 1 facing the viewer first side a of the Rollbondplatine 1 is in Fig. 2 directed to the left, while the second side b is directed to the right. In Fig. 2 It can be seen that the bending edges 3, 4, 5, 6 are formed by bending the two interconnected metal plates 2 in the direction of the second side b. The bending edges 4 and 6 extend in Fig. 2 into the picture plane. The two interconnected metal plates 2 have a thickness d in the core region, which, however, does not necessarily have to be constant over the rollbonding board 1. Preferably, the thickness d is less than 1.40 mm. The two interconnected metal plates 2 are bent in this embodiment with a bending radius r, ie inner radius of 1 mm, to which a flat bending edge portion 8 connects. In this embodiment, the two interconnected metal plates are bent from the core portion 7 to the plane bending edge portion 8 by a bending angle α of 90 degrees. Overall, extend in this embodiment, the bending edges 3, 4, 5, 6 with a height h of 2 mm beyond the second side b addition. Of course, the bending edges 3, 4, 5, 6 may also have different bending radii r and flat bending edge sections 8.

FIG. 3 shows a schematic sectional view of a refrigeration device 10 with a Rollbondplatine 1. The refrigeration device 10 has a refrigerant evaporator, which is provided with a Rollbondplatine 1. The Rollbondplatine 1 is arranged close to the wall in the interior 12 of the refrigerator 10 so that the first side of the rollerboard asterisk 1 faces the interior 12. In this embodiment, an opening 18 for access to the interior space 12 is arranged by a user on a second wall 16 of the refrigeration device 10 with respect to the Rollbondplatine 1, that the first side a of the rollerboard board 1 faces the opening 18. The Rollbondplatine 1 is thus disposed between the second wall 16 with the opening 18 and the opposite first wall 14 of the refrigerator 10. The distance of the Rollbondplatine 1 to the first wall 14 is substantially smaller than the second wall 16. The Rollbondplatine 1 is therefore arranged so that it is preferably mounted in the vicinity of one of the walls of the refrigerator 10. In this case, the first side a of the Rollbondplatine 1 to the interior 12 of the refrigerator compartment 10. As a result, the bending edges 3, 4, 5, 6 of the Rollbondplatine 1 are aligned so that they hardly perceived by a user of the interior 12 are, since the two interconnected metal plates 2 are bent away from the inner space 12. Furthermore, there is no danger to the user when touching the rollerboard 1, for example by contact with a degree at the Rollbondplatinenkante.

The Rollbondplatine 1 offers low bending costs for the bending edges 3, 4, 5, 6 a good bending stability. The stabilization by means of the bending edges 3, 4, 5, 6 can be realized in a small space. The optics of the first side facing a viewer is also not disturbed by visible bending edges.

Used reference signs:

1

Rollbond board

2

two interconnected metal plates

3, 4, 5, 6

bending edges

7

core area

8th

level bending edge section

9

Bend edges free area

10

The refrigerator

12

Interior of the refrigerator

14

first wall of the refrigerator

16

second wall of the refrigerator

18

opening

a

first page

b

second page

d

Material thickness of the metal sheet

H

height

r

bending radius

α

bending angle

A

Line arrow

B

Line arrow

Claims (13)

1. Refrigerator (10), especially household refrigerator, having a coolant evaporator formed from two metal plates (2) connected to one another with a first side (a) and a second side (b), wherein bend edges (3, 4, 5, 6), which are formed by bending the two metal plates (2) connected to one another in the direction towards the second side (b), delimit the core area (7) of the two metal plates (2) connected to one another, characterised that the two metal plates (2) connected to one another are disposed in an internal space (12) of the refrigerator (10), especially close to a wall, such that the first side (a) is facing towards the internal space (12), wherein the two metal plates (2) connected to one another are disposed close to a first wall (14) of the refrigerator (10) which is disposed opposite a closable opening (18) in a second wall (16) of the refrigerator (10).
2. Refrigerator (10) according to claim 1, characterised in that four bend edges (3, 4, 5, 6) delimiting the core area (7) of the roll-bond plate (1) in a straight-line are formed by bending over the metal sheet (2) in the direction of the second side (b).
3. Refrigerator (10) according to one of the preceding claims, characterised in that at least one of the bend edges (3, 4, 5, 6) forms a drip edge.
4. Refrigerator (10) according to one of the preceding claims, characterised in that at least two of the bend edges (3, 4, 5, 6) are spaced apart from one another in their longitudinal extent by areas (9) free of bend edges, especially flat and not bent-over areas.
5. Refrigerator (10) according to one of the preceding claims, characterised in that the material thickness (d) of the metal sheet (2) amounts to between 0.8 and 1.5 mm.
6. Refrigerator (10) according to one of the preceding claims, characterised in that, in the area of the bend edges (3, 4, 5, 6) the two metal plates (2) connected to one another are raised from the core area (7) of the second side (B), especially are raised from the core area (7) of the second side (B) with a height (h) of at least 1.5 to 2.5 times the average material thickness (d).
7. Refrigerator (10) according to one of the preceding claims, characterised in that the two metal plates (2) connected to one another are bent over in the area of the bend edges (1, 2, 3, 4) by a bending angle (α) of 70 to 110 degrees.
8. Refrigerator (10) according to one of the preceding claims, characterised in that the two metal plates (2) connected to one another are essentially rectangular, especially rectangular with rounded corners.
9. Refrigerator (10) according to one of the preceding claims, characterised in that the bend edges (3, 4, 5, 6) have a bending radius (r) of 0.5 to 5 mm.
10. Refrigerator (10) according to claim 7, characterised in that the bending radius (r) transitions into an essentially flat bend edge section (8).
11. Refrigerator (10) according to one of the preceding claims, characterised in that the first side (a) is coated, especially lacquered.
12. Refrigerator (10) according to one of the preceding claims, characterised in that the two metal plates (2) connected to one another form roll-bond plates (1).
13. Refrigerator (10) according to one of the preceding claims, characterised in that the two metal plates (2) connected to one another are essentially disposed in parallel to the first wall (14).

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