WO2012113625A1

WO2012113625A1 - Refrigeration appliance having a rear-wall condenser

Info

Publication number: WO2012113625A1
Application number: PCT/EP2012/051676
Authority: WO
Inventors: Michael Krapp; Karl-Friedrich Laible
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2011-02-23
Filing date: 2012-02-01
Publication date: 2012-08-30
Also published as: DE102011004593A1

Abstract

In a refrigeration appliance, in particular a domestic refrigeration appliance, having a housing (1, 2), which encloses a storage chamber (3), and a condenser (22) which is arranged in a manner spaced apart from a rear side (6) of the housing (1, 2), is fastened to the housing (1, 2) via at least one condenser holder (14) and has at least one wall spacer (30) provided for attachment to the rear side (6), the condenser holder (14) has a bracket on which the wall spacer (30) can be positioned beyond the condenser holder (14) such that it protrudes from the rear side (6).

Description

Refrigeration unit with backwall condenser

The present invention relates to a refrigerator with backwall condenser. Via the condenser, heat extracted from the storage chamber of a refrigerator is released to the environment. For energy-efficient operation of the refrigeration device, it is therefore crucial that the heat can flow away quickly and unhindered from the back wall condenser.

When a refrigerator with backwall condenser is installed in a household, the condenser is generally located in a small gap between the back of the refrigerator housing and an opposite building wall. By the

Condenser heats the air in the gap, he brings a Konvektionsströmung in motion. Heated air flows upwards out of the gap and is replaced by the cooler ambient air flowing in from below. So the back wall condenser is constantly lapped by cool air.

The strength of the convection flow depends decisively on the width of the gap. In a gap that is too narrow, the air flow is too much damped by friction on the split walls to allow efficient convection to form. If the gap is too wide then heated upwardly flowing air at the condenser will mix on its way with cooler air located in the gap at a greater distance from the condenser. The resulting buoyancy remains low, and it takes a long time for the gap to heat up to its full depth. Since the back wall condenser usually releases heat only in phases, a heat release phase is usually already finished again before the gap is heated homogeneously and an efficient convection flow is initiated.

In order for a refrigeration device reliably achieves the energy efficiency specified by the manufacturer at its place of use in the household, it is therefore crucial that suitable

Conditions are created for adequate ventilation of the condenser. It is known to install for this purpose on a rear side of the housing of the refrigerator wall spacers, which, when with an opposite

Building wall come into contact, a suitable gap width between the

Building wall and the back of the housing guarantee. Conventionally, these wall spacers are supplied as accessories that are mounted only at the time of installation of the refrigerator at its place of use. If they were already assembled by the manufacturer, they would have to come from it

resulting larger dimensions of the devices are considered in their packaging. However, a correspondingly enlarged packaging would lead to significantly higher costs for the user, on the one hand because of the increased material costs for the packaging, and on the other hand because of the large packaging volume and the cost of transport to the user.

The conventional wall spacers are attached to the trailing edge of side walls of the refrigerator, since the outside usually made of sheet metal or another

made of durable material sidewalls provide the wall spacers better grip than the usually made of simple cardboard backs of the housing. If the wall spacers are exposed to sideways forces during transport or installation, there is a risk that the wall spacers will break loose or the side panels that support them will be bent. The attachment of the wall spacers by screws is cumbersome, so that many users tend to omit them and for that, without being aware, take disadvantages in energy consumption.

The object of the invention is therefore to provide a refrigeration device with Rückwandverflüssiger, in which a wall spacer is quick, easy and safe to install.

Under a refrigeration device is in particular a household refrigeration appliance understood, ie a refrigeration appliance for household management in households or possibly in the

Catering area is used, and in particular serves to store food and / or drinks in household quantities at certain temperatures, such as a refrigerator, a freezer, a fridge-freezer, a freezer or a wine storage cabinet.

The problem is solved by a refrigeration device, in particular a

Household refrigerating appliance, with a housing enclosing a bearing chamber and a spaced from a rear side of the housing, on the housing via at least one condenser-mounted condenser and having at least one provided for attachment to the back of the housing wall spacers of the condenser holder has a holder on which the wall spacer can be placed over the condenser holder protruding from the back. Since the

Condenser holder for the attachment of the condenser to the refrigerator housing is indispensable anyway, and to provide this secure hold anyway must be securely anchored to the housing, it can be used with minimal effort for the attachment of the wall spacer.

A holder for a wall spacer can be realized almost cost-neutral on a molded from sheet metal or preferably molded plastic condenser.

In order for the condenser not to interfere with the attachment of the wall spacer, the condenser holder preferably has a foot attached to a portion of the rear surface not covered by the plate-shaped condenser, a condenser-engaging head, and a foot-and-head interface to which the support for the wall spacer is formed.

The holder may in particular comprise a recess into which a foot of the wall spacer can be inserted.

To ensure a secure fit of the wall spacer, this is

preferably latched to the condenser holder. It is also expedient if the wall spacer and the condenser holder are integrally formed and connected by an intermediate piece. On the one hand, the joint production of the wall spacer, the condenser holder and the intermediate piece allows cost savings compared to a separate production, also logistical simplifications result from the fact that the wall spacer the finished refrigerator no longer has to be added as an accessory, but if the adapter during assembly of the refrigerator remains intact, is already on completion of assembly on the finished refrigerator. In addition, the local proximity of wall spacers and condenser holder on the refrigerator or by their physical connection over the intermediate piece as well as through the

Complementarity of the shape of the foot of the wall spacer for holding the condenser holder even an inexperienced user the purpose of the wall spacer quickly and without the need to resort to a

Instructions for use clearly.

Preferably, the intermediate piece is flexible to a placement of the

Wall spacer to allow the holder of the condenser holder without destroying the intermediate piece. Such an intermediate piece may in particular be designed as a cable or band, the ends of which are respectively connected to the wall spacer and the condenser holder.

According to an expedient development, the flexible intermediate piece can also be a film hinge. Such a film hinge allows pivoting of the wall spacer between a space-saving, the back of the housing adjacent position, the wall spacer expediently in a

Packaging or during transport of the refrigerator will occupy and an operating position in which it protrudes from the back of the housing.

Most household refrigerators have a machine room at their rear to accommodate a compressor and other components needed for refrigeration. A lining of such an engine room is well suited to attach the condenser holder thereto.

In the non-prepublished German patent application 10 2010 003 088.0 from 19.03.2010 a refrigerator is described in which the condenser

Condensation evaporation troughs are arranged opposite the rear side of the housing in order to control the air draft driven by the condenser in the gap between the rear side and the rear side

Building wall and heat emitted by the condenser to evaporate

Exploit condensation. Such a condensation drainage channel is also suitable for attaching thereto the condenser holder.

In particular, such a condensation water drainage channel may be provided in an outer area of a machine room lining. In order to guarantee optimum gap width for heat exchange, a tip of the wall spacer placed on the condenser holder facing away from the back should have a distance of 50 to 100 mm, preferably 60 to 80 mm, to the back of the housing.

Further features and advantages of the invention will become apparent from the following description of embodiments with reference to the accompanying figures. From this description and the figures are also features of the

Embodiments, which are not mentioned in the claims. Such features may also occur in combinations other than those specifically disclosed herein. Therefore, the fact that several such features are mentioned in the same sentence or in a different type of textual context does not justify the conclusion that they can occur only in the specific combination disclosed;

instead, it must be assumed that, of several such characteristics, it is also possible to omit or modify individual ones, provided that this is the case

Functionality of the invention is not in question. FIG. 1 shows a schematic partial section through a refrigerator according to the invention; FIG. 2 is a perspective view of a condenser holder and a

Wall spacer according to a first embodiment of the invention; the anchoring of the condenser holder; Fig. 4, the condenser holder and the wall spacer in the assembled

Status;

5 shows a second embodiment of the condenser holder and the

Wall spacer;

6 shows a third embodiment of the condenser holder and the

Wall spacer; and 7 shows a cross section through the condenser holder and the wall spacer of FIG. 6 in the swung-out state.

Fig. 1 shows a cross section through the lower portion of a housing of a household refrigerator according to the invention. The housing comprises in a customary manner a body 1 and a door 2 hinged thereto, which surround a storage chamber 3 and whose walls are each one between a solid outer and inner skin

enclosed insulation layer 4, in particular of expanded polyurethane resin having. The inner skin of the body 1, generally referred to as inner container 5, is one-piece deep-drawn from plastic. The outer skin of the body 1 comprises elements made of different materials. While it is generally formed of sheet metal on the side walls of the body 1, not shown in Fig. 1, it consists on the back 6 and the bottom mostly of cardboard plates 7, 8th

At the bottom of the back 6, a machine room 9 is recessed from the body 1, which includes, inter alia, a compressor 10 and evaporation trays 1 1, 12. A

Lining 13, which forms the adjacent to the engine room 9 part of the outer skin of the body 1, is injection molded from plastic. Thus, contours can be realized on the lining 13 comfortable, at which in the engine room 9 mounted components such as the compressor 10 and the evaporation trays 1 1, 12, but also one or more above the engine room 9 on the back 6 protruding condenser 14 quickly and safely let attach.

In the present embodiment, the contours of the liner 13, to which the condenser holders 14 are anchored, simultaneously form condensation channels 15, which extend horizontally between a lower edge of the rear cardboard board 7 and the machine room 9 and condensate from a collecting channel 16 of the inner container 5 via a through receive the insulating layer 4 extending pipe 17. The pipe 17 opens into the uppermost condensate channel 15. Die

Condensation channels 15 each have an overflow (not shown) via which excess condensed water enters the next lower condensation drainage channel 15 or from the lowermost condensation drainage channel 15 into the upper evaporation shell 1 1 mounted on the compressor 10. From this again leads an overflow to the lower evaporation tray 12th The condenser holder 14 is shown in Fig. 2 in an enlarged perspective view. A head 18 of the condenser holder 14 is formed by two wall sections 19, 20 which are approximately C-shaped in plan view and whose legs, which run towards each other, each delimit upwardly open grooves 21. The grooves 21 are provided to receive in each case a refrigerant pipe of a known manner in wire-tube design condenser 22.

From a back of the condenser holder 14 facing the body 1, two lower feet 23 (of which only one is visible in the figure) and one upper foot 24 protrude. 1, the lower feet 23 each rest on one edge of a lower condensation gutter 15, while the upper leg 24 rests under the floor of an upper condensation gutter 15. Thus, the position of the condenser holder 14 is fixed in the vertical direction. Hairpin-shaped detent springs 25 are integrally formed on both sides of the upper leg 24 to the condenser holder 14. These are intended, as can be seen in the top view of the assembled condenser holder 14 shown in FIG. 3, on the insides of the edges of the condensate troughs 15 interconnecting vertical struts 26 attack and so the condenser 14 also in the

To fix horizontal. In an intermediate piece 27 of the condenser holder 14, below the groove 21 and a horizontal plate 28 connecting the wall portions 19, a horizontal gap 29 is provided, which is provided to a foot 31 of a wall spacer 30th

take. The wall spacer 30 is like the plastic condenser holder 14 injection molded, and it has substantially the shape of a rectangular plate 32, which is still stiffened in the present case by a protruding on the underside of the plate, extending in the longitudinal direction rib 33. On the longitudinal sides of the plate 32 projecting nubs 34 are made slightly yielding by behind them arranged holes 35 and ensure a frictional grip or locking of the foot 31 of the wall spacer 30 in the gap 29. The wall spacer 30 has a twofold symmetry axis 36, so that he can be inserted into the gap 29 in two different, rotated by 180 ° orientations. This makes it easier for a layman in particular to correctly place the

Wall spacer 30. Fig. 4 shows the condenser 14 and the wall spacer 30 in assembled configuration. The wall spacer 30 is located in the interior of the gap 29 in a stop position and can not penetrate deeper into the gap. When the refrigerator is pushed against a building wall with wall spacers 30 placed in this manner, the contact of the wall spacers 30 with the building wall defines the width of an air gap between the building wall and the back 6 of the body to a value of 50 to 100 mm, preferably 60 up to 80 mm.

The wall spacer 30 of Fig. 2 is completely separated from the condenser holder 14 when the refrigeration appliance is delivered to a customer and may e.g. stowed in the storage chamber 3 together with other accessories. If an inexperienced user installs the refrigerator immediately after unpacking to its intended location, there is a possibility that he discovered the wall spacer 30 after installation and then no longer used. In order to reduce the probability of this, it is expedient if condenser holder 14 and wall spacers 30 are already connected in the delivery state of the refrigeration appliance, so that the user inevitably discovers the wall spacers 30 when unpacking the appliance.

Fig. 5 shows an embodiment in which the condenser holder 14 and the wall spacer 30 are connected by a cable 37 and preferably even formed in one piece. The

Length of the cable 37 is dimensioned so that the wall spacer 30 can be inserted into the gap 29, without the need for the cable 37 must be severed.

Thus, no tool is required for mounting the wall spacers 30.

It is also conceivable, instead of the cable 37, to provide a connection between condenser holder 14 and wall spacer 30 in the form of a predetermined breaking point.

FIGS. 6 and 7 show a condenser holder 14 and a wall spacer 38 according to a third embodiment of the invention. The condenser holder 14 has the same shape as in the embodiments of Figs. 2 to 5 and will not be described again. Of the

Wall spacer 38 is connected to the condenser holder 14 via a film hinge 39 at the top of its wall portion 19. Fig. 6 shows the wall spacer 38 in a delivery position in which he is in front of the not shown in Fig. 6, held in the grooves 21 condenser 22 in

Much upwards. In the position of use shown in Fig. 7, the wall spacer 38 is pivoted downward, so that a main plate 40 of the

Wall spacer 38 is horizontally aligned and side walls 41 and a support rib 42 extending from the edges or the center of the main plate 40 downwards. A vertical edge of the support rib 42 abuts against the wall portion 19 and a front edge of the plate 28. The side walls 41 also each have an edge 43 which is supported in the position of use on the wall portion 19, and bent over the edge 43 protruding tabs 44, the rest in the position of use laterally on the head 18 and 45 carry locking lugs in the position of use in

Engage latching openings 46 of the head 18 and thus fix the wall spacer 38 in the position of use.

When the device is packaged at the manufacturer, the wall spacers 38 become e.g. fixed by a film enveloping the device in the position of FIG. If the

User removes the film when setting up the device, the wall spacers 38 are movable again and tend under their own weight to swing away.

A user who detects this and tries to lock the wall spacers 38, notes that this is possible only in the use position. The probability that the wall spacers 38 before the final installation of the device at his

Place to be placed in the position of use is therefore high, even if the

User when setting up no installation instructions used.

Claims

Refrigerating appliance, in particular household refrigerating appliance, with a housing (1, 2) enclosing a storage chamber (3) and spaced from a rear side (6) of the housing (1, 2), on the housing (1, 2) via at least one condenser holder ( 14) and at least one wall spacer (30; 38) provided for attachment to the rear side (6), characterized in that the condenser holder (14) has a holder (29; 39,46) on which the Wall spacer (30, 38) over the condenser holder (14) out of the rear side (6) can be placed projecting.

Refrigerating appliance according to claim 1, characterized in that the condenser holder (14) has a foot (23) which is fastened to a region of the rear side (6) not covered by the plate-shaped condenser (22), a head acting on the condenser (22) ( 19, 20) and a foot (23) and head (19, 20) connecting intermediate piece (27), and that the holder (29) on the intermediate piece (27) is formed.

Refrigerating appliance according to claim 1 or 2, characterized in that the holder comprises a recess (29) into which a foot (31) of the wall spacer (30) can be inserted.

Refrigerating appliance according to one of claims 1 to 3, characterized in that the wall spacer (30, 38) on the condenser holder (14) can be latched.

Refrigerating appliance according to one of claims 1 to 4, characterized in that the wall spacer (30; 38) and the condenser holder (14) are integrally formed and connected by an intermediate piece (37; 39).

6. Refrigerating appliance according to claim 5, characterized in that the intermediate piece (37, 39) is flexible.

7. Refrigerating appliance according to claim 5 or 6, characterized in that the

Adapter is a cable (37) or a band.

8. Refrigerating appliance according to claim 6, characterized in that the intermediate piece is a film hinge (39).

9. Refrigerating appliance according to one of the preceding claims, characterized in that the condenser holder (14) on a lining (13) on the rear side (6) of the housing (1, 2) recessed machine room (9) is fixed.

10. Refrigerating appliance according to one of the preceding claims, characterized in that the condenser holder (14) engages on a at the back (6) extending condensation water trough (15).

1 1. Refrigerating appliance according to one of the preceding claims, characterized in that one of the rear side (6) facing away from the top of the condenser holder (14) placed wall spacer (30; 38) a distance of 50 to 100 mm, preferably 60 to 80 mm, to the back (6).