EP2295897A1 - Cooler and liquidizer for same - Google Patents

Abstract

The appliance has a housing (1), and a condenser (3) arranged at a housing wall (2) and including a meander-shaped coolant pipe extending into a condenser plane. The condenser includes a partial section projecting from the condenser plane and includes a lamella layer extending over the coolant pipe in the condenser plane. The partial section forms a distance piece of the condenser with respect to the housing wall and forms a contact surface for fastening the condenser to the housing wall. Distance (13) between the contact surface and the condenser is 10-100 mm.

Description

The invention relates to a refrigeration appliance, in particular a domestic refrigeration appliance, with a housing and with a condenser, which is arranged on a housing wall, wherein the condenser comprises a meander-shaped coolant line which extends in a condenser.

DE 202006002418 U1 describes a refrigerator or freezer with a condenser, which in one embodiment has a cardboard rear wall for acoustic decoupling of its device housing relative to the condenser. On the cardboard rear wall, a fastening means is glued, which in turn serves as a fastening means for a condenser.

The object of the invention is to simplify the assembly of a condenser to a refrigeration device.

This object is achieved by a refrigeration device having the features of claim 1.

A refrigeration appliance is understood in particular to mean a household refrigerating appliance, that is to say a refrigeration appliance that is used for household management, such as, for example, a refrigerator, a freezer or a fridge-freezer combination. An essential part of a refrigeration device is a refrigeration cycle, which consists of a refrigerant line, a compressor, an evaporator, a condenser and a throttle and in which a coolant circulates. A condenser generally includes a portion of the coolant line in which the coolant line meanders. The condenser is preferably arranged outside the housing of the refrigeration device, since the refrigerant is liquefied in it with the release of thermal energy.

In a refrigerator, in particular household refrigeration appliance, with a housing and with a condenser, which is arranged on a housing wall, wherein the condenser comprises a meander-shaped coolant line which extends in a condenser, according to the invention, the condenser has subsections which protrude from the condenser and on the one hand spacers of the condenser opposite the housing wall and on the other hand form contact surfaces for attachment of the condenser to the housing wall. The housing wall is in particular the rear wall of the housing, on the outside of which the condenser is attached. As spacers secure the sections of the condenser, which protrude from the condenser, a spatial distance between the heat-radiating condenser and the thermally insulated against heat housing of the refrigerator. On the other hand, these sections form contact and contact surfaces with which the condenser rests against the housing wall over a certain area, or attachment surfaces for fastening the condenser to the housing wall. Not all, but only individual contact surfaces can be used as mounting surfaces between the condenser and the device wall. In contrast to the prior art so according to the invention no separate spacers must be kept ready and mounted, but at the condenser itself are formed without additional material and mounting requirements, both its contact surfaces and its spacers.

The sections can already be formed during the production of the condenser or only later on a conventional condenser. The condenser according to the invention can therefore be advantageously prepared by means of suitable forming process from a commercial condenser. The deformation can z. B. by bending partial surfaces of the condenser, optionally with heating.

In principle, a condenser may also be shaped such that it no longer forms a continuous condenser plane, but z. B. has a V or arcuate cross-section. Then the condenser has contact surfaces and a distance from the outside of the device, but not a constant distance to a regularly planar device wall. This has in the installation of the refrigerator in a household, especially in front of a room wall in a kitchen or a cellar, an increased space between the housing outer wall and the environment result.

Regularly, a condenser includes the meandering laid coolant line and a plurality of parallel slats attached thereto, which span the meanders and form a lamellar layer. Under lamellae, in particular metallic wires can be understood, which are preferably thermally conductively connected to the coolant line, for example, are welded. The meander-shaped coolant line and the fins have the task of increasing the heat-emitting surface of the condenser to efficiently cool the coolant. There are condensers without, with one or more lamellar layers, which usually extend over the entire coolant line and form with it the condenser. According to an advantageous embodiment of the invention, the condenser is covered on one side or on both sides of the coolant line by a lamellar layer which extends in the condenser plane substantially over the entire coolant line. The partial surfaces according to the invention can also be formed on a condenser with lamellar layer.

The above-described condenser shaped according to the invention can be fixedly attached to a housing wall, in particular a housing outside, of a refrigeration appliance by means of suitable fastening means. As fastening means, for example, screw, riveting or Klips systems are possible. According to a further advantageous embodiment of the invention is as a fastening means the gluing, in particular the gluing means of so-called hotmelting systems provided. Gluing has the mounting advantage that the adhesive surfaces, ie the contact surfaces on the condenser and the corresponding contact surfaces on the housing wall, in the contact plane need not be positioned as accurately as z. B. holes for Schaubsysteme. In this way, omnipresent tolerances of Verfüssigers or the housing wall can be compensated and yet a precise installation of the condenser can be ensured to the housing wall.

Another advantage of using adhesives is the ability to choose larger contact surfaces without significant additional effort. As a result, lower performance and thus cheaper adhesive can be used.

Finally, the bond is able to dampen noise. The adhesive connection is often at least slightly elastic and transmits vibrations between the refrigerator and the condenser less than z. B. screw, so that a glued condenser is quieter in operation.

In a further embodiment of the invention, the contact surfaces have a distance to the condenser of about 10 - 100 mm, in particular 20 mm. At the minimum distance of approx. 10 mm, the refrigerator has minimal external dimensions, so that it can be installed in a space-saving manner. The maximum distance of about 100 mm, however, allows the heat dissipating condenser to be placed as far away as possible from the thermally insulated housing wall. A distance of 20mm represents a compromise, weighing the conflicting interests between the largest possible and the shortest possible distance.

In principle, the sections may be attached at any location in the condenser plane. In a further advantageous embodiment of the invention, the sections are formed on an edge and / or in a central region of the condenser. Partitions in the edge area are easier to access than central areas, which is why they facilitate the installation of the condenser. By additionally including a central region of the condenser for the arrangement of a section which contacts the housing wall, excessive oscillation of particularly large condensers can be prevented.

In a further embodiment of the invention, the protruding sections of the condenser according to the invention can be arranged over the entire length or width of the condenser, so that the condenser is bent as a whole, in any case so the coolant line and, if present, also the lamellar layer. This has the advantage on the one hand that a simple bending process over the entire length or width also requires only simply designed bending devices. In addition, this creates large-scale sections that allow a less tolerance-sensitive installation and possibly simpler adhesive systems.

According to a further embodiment of the invention, the sections may be formed exclusively on a lamellar layer. As a result, the coolant line does not have to be bent. This has the advantage, in particular in the case of a subsequent embodiment of the sections, that unwanted cross-sectional impairments of the coolant line, damage or even leaks are avoided, which can occur when the coolant line is bent. A bending that is carried out only in the lamellar layer, does not affect the operation of the condenser.

In a first embodiment of this type, a plurality of adjacent lamellae, which run continuously over all meanders of the coolant line, can be bent out of the condenser plane in a quasi-hump-shaped manner with a plateau-shaped flattening. By their hump form they form spacers whose plateau-shaped flattening represent contact surfaces. Due to their uninterrupted course, the bent blades do not destabilize the condenser. In a subsequent embodiment of this embodiment, however, the distance of the straight sections of a meander of the coolant line, within which the fins are bent, reduce the meander so close. Because the bent-out slats can not be extended subsequently, as a rule, which shortens the distance they originally bridged originally.

In an alternative embodiment of the invention, a plurality of adjacent lamellae of one or more lamination layers are severed and e.g. Z-shaped so bent out of the condenser plane in a direction that they form the spacer and the contact surface. This variant requires the least changes in the spatial shape of the condenser, so it is predestined for subsequent production of the sections. It is easy to make without altering the original shape of the condenser.

In a further advantageous embodiment of the invention with a condenser with a plurality of lamellar layers, the protruding sections may be formed together on one layer alone or also on a plurality of lamellae layers. For the training on only one lamellar layer speaks the lower cost. If several layers are included in the formation of the sections, a denser contact surface of lamellae of both layers can be formed. The spacer thus formed can also be more stable as a rule, because it can form spacers with different inclinations.

The object is also achieved by a condenser alone with the features of claim 10. It can already be manufactured at the factory in the manner described above or can only be created later by reshaping a commercially available liquefier.

Figur 1

eine prinzipielle Seitenansicht eines Kältegeräts,

Figur 2

eine perspektivische Ansicht eines erfinderischen Verflüssigers mit zwei Lamellenschichten,

Figur 3

eine Detailansicht der Kontaktflächen aus Figur 2,

Figur 4

eine Schnittansicht entlang Linie I - I aus Figur 2,

Figur 5

eine perspektivische Detailansicht einer alternativen Ausgestaltungsform mit zwei Lamellenschichten,

Figur 6

eine der Figur 3 entsprechende Schnittansicht,

Figur 7

eine weitere Ausgestaltungsform eines erfinderischen Verflüssigers,

Figur 8

eine weitere Ausgestaltungsform eines erfinderischen Verflüssigers,

Figur 9

eine Schnittansicht entlang Linie II - II aus Figur 8

The principle of the invention will be explained in more detail below with reference to a drawing by way of example. In the drawing show:

FIG. 1

a schematic side view of a refrigerator,

FIG. 2

a perspective view of an inventive condenser with two lamellar layers,

FIG. 3

a detailed view of the contact surfaces FIG. 2 .

FIG. 4

a sectional view taken along line I - I from FIG. 2 .

FIG. 5

a detailed perspective view of an alternative embodiment with two lamellar layers,

FIG. 6

one of the FIG. 3 corresponding sectional view,

FIG. 7

another embodiment of an inventive liquefier,

FIG. 8

another embodiment of an inventive liquefier,

FIG. 9

a sectional view taken along line II - II FIG. 8

FIG. 1 shows a perspective view of a refrigeration device using the example of a refrigerator with a housing 1. The cubic housing 1 has a housing wall 2, which may be a rear wall of the housing 1 in particular. The housing wall 2 is substantially flat, even if it may have smaller or larger indentations, for example, receive a compressor. If the housing wall 2 is the rear wall of the housing 1, it is located on the opposite side with respect to a door side 14 of the refrigerator. On the housing wall 2, a substantially planar condenser 3 is attached at a distance 13 to her.

FIG. 2 shows a first embodiment of a condenser 3 according to the invention in a perspective view. It consists of a meander-shaped coolant line 4, to which mutually parallel laminar layers 6 are attached. The lamellar layers 6 consist of a plurality of parallel juxtaposed rectilinear lamellae 5, which are fastened to the coolant line 4 at each contact point. The coolant line 4 and the laminar layers 6 are largely in one plane, the condenser 7, and form a plate-shaped unit.

FIG. 3 illustrates the formation of inventive subsections 8: From the upper lamellar layer 6 a plurality of adjacent lamellae 5 are substantially perpendicular to the Lamellierungsrichtung and severed directly on a meander of the coolant line 4. The lower lamellar layer remains untouched. The individual severed lamellae 5 are bent twice and in such a way that they protrude from the condenser plane 7. They form the subsection 8 of the condenser 3, which also represents a spacer 10 of the condenser 3 relative to the housing wall 2 and a flat contact surface 9 for its attachment to the housing wall 2. The spacers 10 rise in a ramp shape from the condenser 7 and go into the contact surfaces 9, which are parallel to the condenser 7. Since the lamellae 5 usually consist of a profiled metal in cross section, the sections 8 with their spacers 10 and the contact surfaces 9 have a sufficient dimensional stability.

In FIG. 4 is a section along the line I - I out FIG. 2 shown enlarged by the section 8. The coolant lines 4 are cut at right angles and have a circular cross-section. The section 8 is formed only from the left in the sectional view slat layer 6. For this purpose, the blades 5 are severed immediately behind a meander of the coolant line 4 and from the condenser 7 (see. FIG. 2 ) bent out. After a first bend 11, they initially rise as spacers 10, in order to transition into the contact surface 9 after a second bend 12, which runs parallel to the lamellar layer 6. The steeper the spacer 10 is bent, the greater the distance formed by it can be.

Alternatively to the in the FIGS. 3 and 4 illustrated embodiment, the bent blades can also be alternately from one and the opposite be bent on the other side to comb in a contact surface with each other. As a result, a possibly smaller, but denser contact surface can be formed.

FIG. 5 shows a further embodiment of the condenser 3 according to the invention in one of FIG. 3 corresponding view. As in that case, it consists of a meander-shaped coolant line 4, to which laminar layers 6, which are parallel on both sides, are attached. In contrast, in FIG. 5 a plurality of adjacent lamellae 5 are severed directly at the coolant line 4 substantially perpendicular to the lamination direction both from the upper and from the lower lamella layer 6. The lower and upper fins 5 are also double and bent out so that they protrude from the condenser 7. They result in a side view the shape of a quasi-flat drawn "Z". The upper and lower blades 5 together form a spacer 10 which, as in FIG FIG. 3 ramps up from the condenser 7 and merges into the contact surfaces 9, which are parallel to the condenser 7.

FIG. 6 shows a section along the line I - I out FIG. 2 through the section 8 from FIG. 5 , The coolant line 4 is cut at right angles and therefore has a circular cross section. The section 8 is formed both from the left and right in the sectional view lamellar layer 6. The first bend 11 and the second bend 12 of the upper and lower lamellae 5 each lie directly on a coolant line 4 and one above the other. The upper fins 5 are slightly longer after bending and protrude at a shallower angle out of the condenser 7 than the lower fins 5. The steeper the spacer 10 is bent, the greater is the distance generated by him.

Another embodiment of the condenser 3 according to the invention is shown in FIG FIG. 7 shown. The condenser 3 in turn consists of a meander-shaped coolant line 4, to which a lamination layer 6 is attached. The sections 8 are formed exclusively on the lamellar layer 6 and over the entire width of the condenser, without affecting the course of the coolant line 4 in itself substantially. They are arranged between the meanders of the coolant line 4. The sections 8 of the lamellar layer 6 protrude quasi arched or bridge-shaped out of the condenser 7 and form each lamella 5 two projecting spacers 10th and one to the liquefier 7 (see. FIG. 2 ) parallel portion of a contact surface 9 for attachment.

Are the sections according to FIG. 7 formed in a transverse direction to the longitudinal extent of the condenser 3, so shows FIG. 8 an embodiment with longitudinally extended sections 8. For this purpose, the entire condenser 3 is deformed, ie both the coolant lines 4 and the lamellar layers 6. In contrast to the embodiment according to FIG. 7 However, individual slats 5 are not necessarily affected by a deformation, because they can pass undisturbed and linear over the entire length of the condenser 3. Of the deformation in this embodiment, only the coolant line 4 is concerned, which is now partially curved or bridge-shaped. This embodiment is also suitable for a subsequent embodiment of the sections 8.

FIG. 9 shows a section along the line II - II FIG. 8 through the condenser 3. The contact surfaces 9 consist of the sections 8 of the deformed coolant line 4 and the lamellar layers 6. Only one feed section 15 (see. FIG. 8 ) of the coolant line 4 runs undeformed and completely in the condenser 7 (see. FIG. 2 ).

Since the foregoing condensers described in detail are embodiments, they may be modified in a conventional manner to a wide extent by those skilled in the art without departing from the scope of the invention. In particular, the upper lamellae 5 can protrude out of the condenser plane 7 at the same angle or at a different angle as shown, like the lower ones. Also, other separation points and staggered bends 11 and 12 can be selected. Likewise, the concrete embodiments of the condenser may follow in a different form than in the rectangular described here, if this is necessary for reasons of space or designerischen reasons. Furthermore, the use of the indefinite article "on" or "one" does not exclude that the characteristics in question may also be present multiple times.

LIST OF REFERENCE NUMBERS

1

casing

2

housing wall

3

condenser

4

Coolant line

5

slats

6

disc layer

7

Verflüssigerebene

8th

sections

9

contact surfaces

10

spacer

11

first bend

12

second bend

13

distance

15

lead portion

Claims (10)

Refrigerating appliance, in particular household refrigerating appliance, with a housing (1) and with a condenser (3) which is arranged on a housing wall (2), wherein the condenser (3) comprises a meander-shaped coolant line (4) which is arranged in a condenser plane (7) ), characterized in that the condenser (3) subsections (8) which protrude from the condenser (7) and the one hand spacers (10) of the condenser (3) relative to the housing wall (2) and the other contact surfaces (9) for fastening the condenser (3) to the housing wall (2). Refrigerating appliance according to claim 1, characterized in that the condenser (3) on one side or on both sides of the coolant line (4) comprises a lamellar layer (6) which extends in the condenser plane (7) substantially over the entire coolant line (4). Refrigerating appliance according to claim 1 or 2, characterized in that the condenser (3) via the contact surfaces (9) with an adhesive, in particular a hot-melt adhesive, on the housing wall (2) is firmly bonded. Refrigerating appliance according to claim 1, characterized in that the contact surfaces (9) have a distance to the condenser (3) of 10 - 100 mm, in particular 20 mm. Refrigerating appliance according to claim 1, characterized in that the subsections (8) are formed on an edge and / or in a central region of the condenser (3). Refrigerating appliance according to one of claims 1 to 6, characterized in that the subsections (8) extend over the entire length or width of the condenser (3). Refrigerating appliance according to one of claims 1 to 6, characterized in that the subsections (8) are formed exclusively on a lamellar layer (6). Refrigerating appliance according to claim 7 with a condenser (3) with a plurality of lamellae layers (6), characterized in that the partial sections (8) are formed together on a lamellar layer (6) alone or on both lamellae layers (6). Refrigerating appliance according to claim 7 or 8, characterized in that a plurality of adjacent lamellae (5) of one or more lamellar layers (6) are severed and bent out to form subsections (8) from the condenser plane (7). Condenser (3) for a refrigeration appliance, in particular for a domestic refrigeration appliance, with subsections (8) which protrude from a condenser plane (7) and at the same time form spacers (10) and contact surfaces (9) according to one of the preceding claims.

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