Abstract:
A cooling device for installation in a furniture niche includes at least one thermally insulating container defining a cooling space and having a door for sealing the space, and a cooler having a compressor, a condenser, and a ventilator. The base has at least two sidewalls, a front region disposed near the door, a rear region, at least one air supply aperture at the front region, and an exhaust aperture at the rear region. The base houses the compressor, condenser, and ventilator. The base is disposed below the cooling space and is force ventilated by the ventilator through the air supply aperture and the exhaust aperture. The exhaust aperture is in at least one of the sidewalls, preferably, in the rear region of the base averted from the door. Preferably, the cooling device is installed in a furniture niche of a kitchen unit.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of copending International Application No. PCT/EP00/01080, filed Feb. 10, 2000, which designated the United States. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The invention relates to a cooling device for installation in a furniture niche of a kitchen unit or the like. The device includes at least one thermally insulating cooling space, which can be sealed by a door, and a base disposed therebeneath. The base serves to accept assemblies such as compressors, ventilators, and so on, and is force ventilated by the ventilator by way of at least one air inlet in the front region at the door side. To achieve an optimal volume of cooling space in built-in cooling devices, the prior art equips them with what is referred to as a base, within which the condenser/liquifier and the ventilator are disposed. As a result, these assemblies reduce the volume of the cooling space only marginally, if at all. 
     U.S. Pat. No. 3,142,162 to Herndon et al. describes such a cooling device. In the Herndon cooling device, a base is provided under the cooling space, the back of which accepts a compressor, a condenser, and a ventilator that force ventilates these assemblies. The ventilator supplies cool air to the assemblies that must be cooled by way of an air supply vent in the front region at the door side and an adjoining air inlet channel. The ventilator removes the hot air through an exhaust channel at its mouth and an exhaust vent in the front region at the door side. To prevent a short, which substantially degrades the cooling of the assemblies, a separating wall is provided in the base, which extends from the openings in the door-side front region into the rear region serving for receiving the assemblies. Thus, the wiring of the base is subdivided into two sections. However, the subdivision of the base interior substantially limits the possibility for configuring the assemblies suitably for cooling. In such regard, the condenser must be positioned on the air supply side to be able to cool it sufficiently to achieve an acceptable level of effectiveness for the cooling device. A consequence of such a function-specific configuration is that the condenser occupies a width of the air supply section to limit the area of the heat exchange surface of the condenser, particularly when the height of the base is fixed to a maximum value for optimizing the cooling space volume. Another consequence of the electrical subdivision is that the amount of cool air, which is necessary for cooling the assemblies, is only available when the air is moved along the channels at a relatively high velocity. Consequently, floating particles, which are commonly present in the standing area of a cooling device, are drawn into the base region and settle on the surface of the condenser (which is wound into several layers), causing the heat exchange characteristics to deteriorate substantially over the service life of the cooling device. Such deterioration results in a notable reduction of the effectiveness of the device. An additional reduction of the effectiveness derives from configuring the supply and exhaust openings immediately adjacent one another, because, with such a configuration, hot air that exits at the exhaust opening cannot be prevented from being drawn in again through the supply opening, at least to some extent, so that the preheated air is used to cool the condenser. 
     SUMMARY OF THE INVENTION 
     It is accordingly an object of the invention to provide a cooling device for installation in a furniture niche that overcomes the hereinafore-mentioned disadvantages of the heretofore-known devices of this general type and that provides at least one exhaust aperture in the back region of one of the walls of the base that is averted from the door. 
     With the foregoing and other objects in view, there is provided, in accordance with the invention, a cooling device for installation in a furniture niche, including at least one thermally insulating container defining a cooling space and having a door for sealing the cooling space, and a cooling apparatus including a compressor, a condenser, and a ventilator. The base has at least two sidewalls, a front region disposed in a vicinity of the door, a rear region, at least one air supply aperture disposed at the front region, and an exhaust aperture disposed at the rear region. The base houses the compressor, the condenser, and the ventilator. The base is disposed below the cooling space. The base is force ventilated by the ventilator through the at least one air supply aperture and the exhaust aperture. The exhaust aperture is disposed in at least one of the sidewalls. Preferably, the cooling device is installed in a furniture niche of a kitchen unit. 
     On one hand, the spatial separation of the air supply aperture from the exhaust aperture prevents the cool air that is drawn in by way of the supply aperture from mixing with the exhaust air that has already been heated in the process of cooling of the assemblies, and thereby noticeably improves the cooling of the assemblies and also the effectiveness of the device. Furthermore, because the supply and exhaust apertures are spatially separated, it is possible to forgo a channel formation within the interior of the base. Thus, the device assemblies are configurable in the base for optimum effectiveness. Moreover, because the electrical subdividing in the interior of the base is forgone, a larger air supply cross-section is possible, and the cool air that is required for sufficient cooling of the device assemblies can be transported at a low velocity. The low velocity produces a substantially reduced drag of particles into the interior of the base, which results in a substantially lower degree of contamination of the interior of the base and, thus, of the condenser. Accordingly, the heat exchange characteristics of the condenser are maintained nearly over the entire service life of the cooling device. It is particularly expedient when the exhaust aperture is disposed sitting in the rear region at one of the walls of the base, as provided in a preferred exemplifying embodiment of the invention. 
     According to a separate preferred embodiment of the invention, the exhaust aperture is disposed at least at one of the side walls of the base. With such a configuration of the exhaust aperture, it is already sufficiently spatially separated from the supply aperture so that a heating of the cool air streaming in through the supply aperture by the hot exhaust air that is removed from the exhaust aperture is at least substantially prevented to the benefit of a substantial improvement of the effectiveness of the cooling system. Additionally, an air throughput through the exhaust aperture, which is sufficient for cooling the assemblies, is easily achievable. 
     In accordance with another feature of the invention, there are at least two exhaust apertures, the sidewalls each have a sidewall rear region in a vicinity of the rear region of the base, and at least one of the exhaust apertures is disposed in the sidewall rear region of one of the sidewalls. 
     At least one respective exhaust aperture is provided at the sidewalls in the back region of the base. As such, a particularly minimal particle drag into the base space is achieved. Furthermore, the exhaust removal is substantially faster given constant ventilator power. The exhaust apertures are disposed particularly expediently with respect to a spatial separation of the supply and exhaust apertures when, in accordance with a further feature of the invention, the exhaust apertures are disposed at the sidewalls of the base immediately adjacent to its back wall. 
     In accordance with an added feature of the invention, at least one exhaust aperture is disposed at the back side of the base. By virtue of the configuration of the exhaust aperture, the hot air is reliably prevented from mixing into the cool air serving for the cooling of the assemblies, thereby increasing the effectiveness of the cooling system even further. 
     In accordance with an additional feature of the invention, the front region of the base has a front wall defining the at least one supply aperture, the front wall has a width, and the supply aperture extends at least substantially across the width of the front wall. 
     With such a base construction, a particularly large exhaust feed is possible given a low airspeed. Furthermore, it becomes possible to tune the width of the condenser, for example, to the width of the air supply aperture, whereby the condenser is cooled particularly intensively. Thus, the effectiveness of the cooling system is enhanced particularly expediently. 
     The condenser experiences a particularly intensive cooling when, in accordance with yet another feature of the invention, the condenser is positioned at least substantially in a vicinity of the at least one supply aperture and behind the at least one supply aperture in an air flow direction. 
     In accordance with a concomitant feature of the invention, the ventilator is disposed between the condenser and the compressor. 
     Other features that are considered as characteristic for the invention are set forth in the appended claims. 
     Although the invention is illustrated and described herein as embodied in a cooling device for installation in a furniture niche, it is, nevertheless, not intended to be limited to the details shown because various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims. 
     The construction and method of operation of the invention, however, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a fragmentary, front, perspective view of a kitchen unit integrated refrigerator with a base for receiving device assemblies; 
     FIG. 2 is a top, perspective view of a first embodiment of the base of FIG. 1 according to the invention; 
     FIG. 3 is a top, perspective view of a second embodiment of the base of FIG.  2 . 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In all the figures of the drawing, sub-features and integral parts that correspond to one another bear the same reference symbol in each case. 
     Referring now to the figures of the drawings in detail and first, particularly to FIG. 1 thereof, there is shown a kitchen unit  10  having three adjacent cabinets  11   a,    11   b  and  11   c,  whose front is formed by doors  12  that are constructed at different heights, and whose body rests on height-adjustable feet  13  that stand on the non-illustrated floor of the kitchen. For clarity, only the feet of the center cabinet element  11   b  are shown. The cabinet elements  11   a  and  11   c  that adjoin the center element  11   b  are constructed as conventional tall cupboards including sidewalls  14 , whose sides that face the kitchen floor are provided with a cutout  15  that recedes from the front of the kitchen unit  10 . The cutout  15  includes a limiting surface that serves as a stop for a base facing  16  and that, in the installed condition, covers the feet  13  and gives the kitchen unit  10  a base-type or pedestal-type return. The base facing  16  includes a recess  17  that is open at the margin and oriented in its installed position approximately centrally relative to the width of the center cabinet element  11   b,  and that is covered by a ventilation blind  18  having an angular cross-section. A first leg  19  of the ventilation blind  18  extends parallel to the base facing  16  in the installed position and has ventilation slots  20 , while its second leg  21 , which is disposed perpendicular to the first leg  19  and points towards the kitchen unit  10  with its free end, serves for holding the ventilation blind  18  at the center cabinet element  11   b.  In contrast to its neighboring cabinet elements  11   a  and  11   c,  the center cabinet element  11   b  is constructed as a niche  22  that is formed substantially from a ceiling (not described in further detail) and a non-illustrated rear panel, as well as two side panels  23  that are disposed at least approximately at a parallel distance from each other. The inner surfaces of the side panels  23  that face each other are provided with protruding bearing strips  24  having flat profiles. The bearing strips  24  are disposed at the same height. The adjustment elements  13  are supported at the bearing strips  24 . At the same time, the bearing strips  24  serve for supporting a built-in cooling device  25  including a door  26  (shown in a closed position) and whose front side is provided with a front furniture panel  27  that is adapted to the adjacent pieces of furniture. To support the built-in cooling device  25  at its housing, a rigid, self-bearing base  28  is provided, of which a first variant is shown in FIG.  2 . 
     FIG. 2 illustrates the base  28  having two cantilevers  29 , whose free ends are averted from each other and whose bearing surface  30 , which is situated on top (when the base  28  is in the installed position), serves to support the device housing, while their bottom bearing face  31 , which is situated parallel to the top bearing surface, is supported at the bearing strips  24 . Besides the cantilevers  29 , the base  28  includes a trough  32  that has a solid floor  33  and a solid back wall  34 . Opposite the back wall  34 , the base trough  32  is furnished with a front wall  35  that has an opening  36  that is disposed at least approximately across its height and width and whose longitudinal side opposite the floor  33  is constructed open at the margin. The front wall  35  and the back wall  34  are connected to each other by sidewalls  37 , each of which is provided with vertically extending reinforcing ribs  38  on an interior surface that is averted from the free ends of the cantilevers  29 , and each of which includes a breakthrough  39  or gap in the back region of the base  28 . In the embodiment, the breakthrough  39  extends between the reinforcing ribs, which are disposed immediately adjacent the back wall  34  and the reinforcing ribs  38 , which are disposed approximately midway along the length of the sidewalls. The sidewalls  37 , together with the floor  33 , the back wall  34 , and the front wall  35 , define a trough space  40 , which serves to accommodate various device assemblies, namely a coiled condenser  41 , a ventilator  42 , and a compressor  43 . The condenser  41  is disposed in the vicinity of the front wall  35  and extends at least approximately with the dimensions of the aperture  36 . The ventilator  42  is disposed behind the condenser  41  in the direction of the back wall  34 . The compressor  43  is disposed behind the ventilator  42  in the direction of the back wall  34  and fixed to the floor  33  of the trough  32 , like the ventilator  42 , and the condenser  41 . 
     The ventilator  42  serves to force ventilate the condenser  41 , which must be cooled by cold air, and, to such an end, the ventilator  42  draws cold air through the aperture  36  provided in the front wall  35  as indicated by arrow A and transports the drawn-in air forward to the downstream compressor  43 , which must also be cooled. Together with the back wall  34 , the compressor  43  splits the forced cold air into sub-streams and deflects the air to the breakthroughs  39  that are provided in the sidewalls  37 . The breakthroughs  39  are disposed behind the configuration including the condenser  41  and the ventilator  42  in the direction of the back wall  34 . The cold air that is deflected to the breakthroughs  39  (see arrows B) escapes through these and flows along the channel formed between the exterior surfaces of the sidewalls  37  and the interior surfaces of the side panels  23 , before escaping from the niche  22  on the door side. 
     FIG. 3 illustrates a second exemplifying embodiment of a base  50 , which, like the base  28 , is equipped with two cantilevers  51 . The cantilevers each have a bearing surface  52 , the top surface of which in the installed position serves for supporting the housing of the built-in cooling device  25 , while their bottom bearing surface  53 , which is parallel to the top surface, is provided for supporting the rigid and self-bearing base  50  at the bearing strips  24 . The base  50  is also equipped with a trough  54 , which includes a solid floor  55  and two solid sidewalls  56 . The sidewalls  56  each have vertical reinforcing ribs  57  on their interior surface, which is averted from the side panels  23 . The sidewalls  56  are connected to each other at their door-side end portions by a front wall  58  having an aperture  59  that is open at the margin in the direction of bearing surfaces  52  and that serves as a ventilation opening. Opposite the front wall  58 , the trough  54  includes a back wall  60  that connects the two sidewalls  56  to each other at their ends averted from the door  26 . The back wall  60 , like the front wall  58 , has an aperture  61  having at least substantially the same area as the aperture  59  and extending in like manner at least substantially to the floor  55 . The back wall  60 , together with the front wall  58 , the two sidewalls  56 , and the floor  55 , define a trough space  62  for accommodating various device assemblies, namely a coiled condenser  63 , a ventilator  64 , and a compressor  65 . The condenser  63  is disposed in the immediate vicinity of the front wall  58  and at least substantially occupies the area of the aperture  59 . The ventilator  64  is disposed behind the condenser  63  in the direction of the back wall  60 . The compressor  65  is disposed behind the ventilator  64 . The compressor  65  is fixed to the floor  55  of the trough  54 , like the ventilator  64  and the condenser  63 . 
     As in the first embodiment, the ventilator  64 , which is disposed between the condenser  63  and the compressor  65 , serves to force cool the condenser  63  by drawing cold air across the surface of the condenser  63  by way of the aperture  59  in the front wall  58  (as indicated by arrows C), from where it is subsequently fed through the ventilator  64  to the compressor  65  in order to the compressor  65 . The cold air that is fed to the compressor  65  is split thereby into non-illustrated air sub-streams that sweep past the side of the compressor  65 , one of which is led along the solid sidewalls  56 , and one of which is led along the bottom of the cooling device housing at the base side. The two sub-streams are thereby conducted to the aperture  61  in the back wall  60 . The air sub-streams that are fed to the aperture  61  in the back wall escape from the trough by way of the aperture  61  and flow into the air channel formed by the back wall of the built-in cooling device  25  and the back wall of the niche  22 , through which the exhaust air that has been enriched with heat upon passing the device assemblies escapes into the standing area of the unit  10 . In the second exemplifying embodiment, as in the first embodiment, the structural unit formed by the condenser  63  and the ventilator  64  is positioned in front of the aperture  61  in the back wall  60  in the flow direction of the cold air that is force driven by the ventilator. 
     In the embodiments, the supply apertures  36  and  59  for the cold air are spatially separated from the escape apertures  39  and  61 , respectively, in the trough space  40  and  62 , respectively, to at least substantially prevent a mixing of the cold air that flows into the trough space  40  and  62  with the hot exhaust air that flows therefrom.