DE29617743U1 - Refrigerator and / or freezer - Google Patents

Description

AEG Hausgeräte GmbH D-90429 Nuremberg

Refrigerator and/or freezer

The invention relates to a refrigerator and/or freezer with a condenser.

A refrigerator and/or freezer with a circulating coolant necessarily has at least one coolant compressor, one coolant condenser and one coolant evaporator in the flow direction of the coolant. The efficiency achievable with this cycle depends, among other things, sensitively on the efficiency of the condenser.

In the condenser, the hot, highly compressed refrigerant is converted, at least to a large extent, into the liquid phase by heat exchange. A number of different types of condenser are used as condensers, such as fin condensers or tube-wire condensers. Such condensers are usually arranged on the back of the refrigerator and/or freezer, which means that the back is relatively jagged and the condenser is exposed to damage, especially during transport. Such damage can lead to the refrigerant leaking out, which is undesirable for various well-known reasons.

Less frequently used are so-called skin condensers, which result in a comparatively smooth surface on the rear wall. However, with this type of condenser, the area of the rear of the device limits the condenser performance, with the area of the rear being

This type of condenser has a much stronger influence on the achievable condensation than the other condenser types mentioned above.

The above mentioned designs have the characteristic that there is never a closed back panel, as is common for devices from the USA or the Far East. Such a more or less smooth and flush back panel is considered standard in these countries and is one of the
Minimum requirements. However, this flush-mounted rear side requires other types of condenser. On the one hand, it is intended that the condenser is arranged in the base with fan ventilation, which avoids adverse effects due to additional costs, space requirements and noise
On the other hand, condenser types are known in which the condenser is located in the side walls of the device
is arranged as a statically ventilated skin condenser, which means that the devices can no longer be placed directly next to adjacent furniture.

The invention is therefore based on the object of providing a cooling
and/or freezer in which the arrangement of the condenser is possible with a smooth rear wall of the appliance and with little effort and high efficiency of the condenser.

This task is performed on a device of the type mentioned above
Art solved according to the invention in that the condenser
is arranged between two flat components with good heat conduction.

In this way, the condenser is formed by the flat components as a smooth, flush surface on the outside.

is designed in such a way that the good heat conduction properties of the components have a particularly good influence on the heat exchange surface available to the condenser. This means that the condenser works with a particularly high level of efficiency.

The heat exchange between the condenser and the flat components that conduct heat well, and thus also with the environment, is particularly intensive if the condenser itself is attached to the components in a heat-conducting manner, at least in part. In this way, the heat exchange surface provided by the components is used advantageously for condensation.

For structural reasons, it is particularly advantageous if the components are aligned largely parallel to each other and/or arranged on the back of the device.

With regard to the air flow guidance and thus the heat dissipation of the condenser, it is expedient if the components form a shaft that is open at the top and bottom and extends over at least a large part of the rear surface and is largely vertically aligned. It is also conceivable that this shaft is alternatively open on all sides.

Further advantageous embodiments of the invention can be found in the remaining subclaims.

Embodiments of the invention are explained in more detail with reference to a drawing.

Showing:

Fig. 1 shows a perspective and schematic rear view of a cooling device with a condenser arranged in a shaft shown partially broken away; and

Fig. 2 shows an alternative arrangement of the condenser tubes in the shaft compared to Fig. 1.

In Fig. 1 and 2, identical parts have the same reference numerals.

Fig. 1 shows a perspective and schematic rear view of a cooling device 2, of which a cover 4, a side wall 6, a base 8 and the door 10 can be seen. On the rear of the device 2, in the lower area above the base 8, a compressor niche 12 with a refrigeration machine 14 that is only indicated is arranged.

A shaft 18 made of thin metal sheets 16a, 16b extends over almost the entire rear surface of the device 2, in which a condenser line 20 is arranged in a spiral shape. The condenser line 20 is also attached to the metal sheets 16a, 16b over its entire length in a way that conducts heat well, whereby the comparatively large surface area of these metal sheets 16a, 16b is used for heat exchange.

The heat exchange is particularly effective because there is not only an air flow through the shaft 18 but also a heat exchange with the outside environment from the sheet 16a and a heat exchange between device 2 and sheet 16b via an air duct. In this way, the condenser, here the spiral-shaped condenser line 20, works particularly effectively, which increases the operating point of the refrigeration machine.

machine 14 and overall leads to a particularly low power consumption of the refrigeration machine 14.

In order to be able to make the sheets 16a, 16b particularly thin, a support element 22 is provided in Fig. 1, which can consist of a polystyrene or cardboard strip, for example. In the embodiment according to Fig. 1, the shaft 18 only has an opening at the top and bottom. However, it is just as possible for the shaft 18 to be open on all sides and actually only limited by the sheets 16a, 16b.

Such a design is provided, for example, in the embodiment according to Fig. 2, in which the condenser line 20 is extended in a meandering manner over both sheets 16a, 16b and the shaft 18 is subsequently resulted by bending the condenser line 20 in the region 24 of the separation of sheets 16a and 16b.

In addition to the examples given above or as an alternative, the condenser line can also be arranged between sheets 16a, 16b, which in turn are already arranged at least partially in the base 8. It must only be ensured that a suitable air convection flow is set for the intended static cooling, for example according to arrows 26.

Claims (10)

AEG Hausgeräte GmbH D-90327 Nuremberg 1. Refrigerator and/or freezer (2) with a condenser (20), characterized in that the condenser (20) is arranged between two flat components (16a, 16b) with good heat conduction. 2. Refrigerator and/or freezer according to claim 1, characterized in that the condenser (20) is attached to the components (16a, 16b) in a heat-conducting manner at least partially in the sense of a thermal bridge. 3. Refrigerator and/or freezer according to claim 1 or 2, characterized in that the components (16a, 16b) are aligned largely parallel to one another. 4. Refrigerator and/or freezer according to one of claims 1 to 3, characterized in that the components (16a, 16b) are arranged on the rear of the device (2). 5. Refrigerator and/or freezer according to one of claims 1 to 4, characterized in that the components (16a, 16b) are flat metal sheets or reinforced metal foils. 6. Refrigerator and/or freezer according to claim 5, characterized in that the components (16a, 16b) form a vertically aligned shaft (18) which is open at the top and bottom and extends over at least a large part of the rear surface. : ,·*£3-!·9,9.&bgr;/007 7. Refrigerator and/or freezer according to claim 5, characterized in that the components form a vertically aligned shaft (18) which is open on all sides and extends over at least a large part of the rear surface. 8. Refrigerator and/or freezer according to claim 6 or 7, characterized in that the condenser pipe (20) is arranged in a spiral shape in the shaft (18). 9. Refrigerator and/or freezer according to claim 6 or 7, characterized in that the condenser pipe (20) is extended in a meandering manner over both components (16a, 16b). 10. Refrigerator and/or freezer according to one of claims 6 to 9, characterized in that support elements (22) are provided between the components (16a, 16b).