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EP0718570A2 - Refrigeration apparatus, especially refrigerator or freezer - Google Patents

Refrigeration apparatus, especially refrigerator or freezer Download PDF

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Publication number
EP0718570A2
EP0718570A2 EP95117860A EP95117860A EP0718570A2 EP 0718570 A2 EP0718570 A2 EP 0718570A2 EP 95117860 A EP95117860 A EP 95117860A EP 95117860 A EP95117860 A EP 95117860A EP 0718570 A2 EP0718570 A2 EP 0718570A2
Authority
EP
European Patent Office
Prior art keywords
sound
air
labyrinth
absorbing
airway
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95117860A
Other languages
German (de)
French (fr)
Other versions
EP0718570A3 (en
EP0718570B1 (en
Inventor
Matthias Dr. Ing. Mrzyglod
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
Bosch Siemens Hausgerate GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bosch Siemens Hausgerate GmbH filed Critical Bosch Siemens Hausgerate GmbH
Priority to SI9530450T priority Critical patent/SI0718570T1/en
Publication of EP0718570A2 publication Critical patent/EP0718570A2/en
Publication of EP0718570A3 publication Critical patent/EP0718570A3/en
Application granted granted Critical
Publication of EP0718570B1 publication Critical patent/EP0718570B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/003—General constructional features for cooling refrigerating machinery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2201/00—Insulation
    • F25D2201/30—Insulation with respect to sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2323/00—General constructional features not provided for in other groups of this subclass
    • F25D2323/002—Details for cooling refrigerating machinery
    • F25D2323/0021—Details for cooling refrigerating machinery using air guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2323/00—General constructional features not provided for in other groups of this subclass
    • F25D2323/002—Details for cooling refrigerating machinery
    • F25D2323/0026—Details for cooling refrigerating machinery characterised by the incoming air flow
    • F25D2323/00264—Details for cooling refrigerating machinery characterised by the incoming air flow through the front bottom part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2323/00—General constructional features not provided for in other groups of this subclass
    • F25D2323/002—Details for cooling refrigerating machinery
    • F25D2323/0027—Details for cooling refrigerating machinery characterised by the out-flowing air
    • F25D2323/00274—Details for cooling refrigerating machinery characterised by the out-flowing air from the front bottom

Definitions

  • the invention relates to a refrigeration device, in particular a refrigerator or freezer with at least one cold space arranged within its heat-insulating housing and closable by a door, and to a unit space for accommodating device assemblies, such as a fan, condenser and compressor, within which at least one supply air is supplied - And an exhaust air port connected, designed as a flow channel for receiving the device assemblies, is provided, which is provided with upstream of the device assemblies on the supply side and these downstream sound-absorbing means and is supplied with cooling air by the fan.
  • device assemblies such as a fan, condenser and compressor
  • a refrigeration device which is equipped below its cold room serving as a useful space with a base, in the space bounded by its walls a U-shaped air duct arrangement is provided. This is used to hold the device units, such as fans, condensers and compressors, and has both a supply air and an exhaust air opening, each of which is equipped with sound-absorbing means for reducing the noise emanating from the fan and the compressor and propagating via the airway.
  • Such noise insulation measures often require technically complex additional equipment in the form of measuring devices, which is not inconsiderably reflected in the device costs, and, on the other hand, constantly recurring maintenance measures that depend on the device installation location. These, in turn, are often not feasible by technically less experienced people themselves, so that this group of people, in addition to the maintenance measure itself, is often provided with cost-intensive customer service.
  • the invention has for its object to propose soundproofing measures for a refrigerator according to the preamble of claim 1, which have a high functionality with a simple structure and at the same time adequate ventilation of the device aggregates is ensured for a long time.
  • the sound-absorbing means are formed predominantly from sound-absorbing material and are arranged at least in sections to form a labyrinth-like air path for the cooling air circulated by the fan, which is able to flow essentially uninhibited within the labyrinth-like air path.
  • the solution according to the invention avoids a flow through the sound-absorbing means and thus provides an almost flow-resistant sound insulation, on which there is almost no pressure loss in the cooling air flow which leads to congestion effects and thus to cooling losses.
  • in addition to complex devices which monitor the permeability of the sound-absorbing means there is also no need for constantly recurring maintenance measures.
  • it is possible through the solution according to the invention to vary the noise-reducing effect of sound insulation be it through appropriate choice of material or through a large number of rows of labyrinth sections, without any noticeable loss of cooling air performance, the sound-insulating effect also being effective through a variety of different labyrinth structures can influence.
  • the labyrinth-like airway is particularly versatile in terms of its structure and particularly easy to influence in terms of its sound-absorbing effectiveness if, according to a further advantageous embodiment of the object of the invention, it is provided that the labyrinthine Airway is essentially formed by the wall surfaces of mutually one behind the other at a distance from one another, along wall 20, 32 of the airway designed as flow channel 26, sound-absorbing individual elements, the mutually facing ends of which overlap.
  • the labyrinth-like airway is particularly simple and yet has sufficient sound-absorbing effectiveness if, according to a next advantageous embodiment of the object of the invention, it is provided that the labyrinth-like airway is formed by the walls of at least two mutually spaced, sound-absorbing individual elements, whose mutually facing ends overlap.
  • a particularly uniform flow cross section within the labyrinth-like airway can be achieved if, according to a further preferred embodiment of the object of the invention, it is provided that the walls of the individual elements forming the labyrinthine airway are arranged at a parallel distance from one another.
  • the sound-absorbing individual elements can be arranged particularly easily to form a labyrinth-like airway if, according to a further advantageous embodiment of the object of the invention, they are designed as cuboid shaped parts. Furthermore, this design of the individual elements makes it possible to integrate them into the construction technology for the assembly room with load-bearing functions.
  • a particularly space-saving structure for a labyrinth-like airway is obtained if it corresponds to another preferred embodiment of the object of the invention it is provided that the cuboid-shaped individual elements for forming the labyrinth-like airway are arranged substantially perpendicular to the walls of the flow channel.
  • the labyrinth-like airway is arranged at a distance from the supply air and exhaust air openings of the flow channel.
  • Such a measure ensures that the cooling air can enter a wide range via the supply air opening and that the exhaust air can also exit wide and unobstructed via the exhaust air opening.
  • the sound emanating from the noise sources such as the fan and compressor, is not attenuated immediately in front of a possible operator of the refrigerator, but in advance, so that this operator is not exposed to unnecessary noise levels.
  • a flow duct is particularly expedient if, according to a further advantageous embodiment of the object of the invention, it is provided that at least one side wall of the flow duct running along the flow direction of the cooling air is lined with sound-absorbing material in the region of the labyrinthine airway.
  • the flow channel has a U-shaped contour and its supply air section is separated from its exhaust air section by a sound-absorbing partition.
  • both the longitudinal side of the supply air and exhaust air ducts are equipped with the noise-reducing, sound-absorbing material in a single step.
  • the lower section of a kitchenette 10 is indicated schematically, which has a niche 11 for installing a built-in freezer 12.
  • This is equipped with a freezing space 14 which can be closed by a heat-insulated door 13 and which is heat-insulated in a conventional manner and which is cooled by the evaporator tier, which is not shown and is arranged at intervals one above the other.
  • drawer-like containers 15 serving for the storage of frozen goods can be introduced, which can be used if necessary by means of a handle (not specified) can be removed from the freezer compartment 14.
  • a device base 16 is provided below the freezer compartment 14, adjoining it, but thermally separated from it by the bottom of the freezer compartment 14.
  • the appliance base 16 has a base base 17, from the side edges of which are arranged toward the base of the freezer compartment 14, surrounding a base space.
  • the door 13 facing the front plinth wall is designed as a detachably held ventilation grille 18 with lattice-shaped divided air passage openings 19, while the remaining plinth walls are designed as a continuous wall train 20, which is molded onto the plinth floor 17 and in this way together with it in one piece Form molding, which is made for example from plastic injection molding.
  • the base space delimited by the ventilation grille 18 and the continuous wall line 20 serves as an aggregate space 21 for accommodating device assemblies, such as a condenser 22, a compressor 23 and a fan 24 arranged between the two in relation to the ventilation grille 18 in its rear area generates during its operation an air flow 25 (shown in dashed lines) which circulates in the direction of the arrow, so that the condenser 22 for cooling lies in the pressure-side section of the air flow 25, while the compressor 23 is swept by the suction-side section of the air flow 25 for its cooling.
  • a condenser 22 for cooling lies in the pressure-side section of the air flow 25
  • the compressor 23 is swept by the suction-side section of the air flow 25 for its cooling.
  • the air flow 25 is guided within the unit space 21 in a U-shaped flow channel 26 serving as an airway, within which is arranged in the rear area of the unit space 21, through the two legs of the U-profile connecting yoke formed channel section, the equipment units are arranged.
  • the two duct sections which serve as the exhaust air duct 27 and the supply air duct 28, are separated from each other in terms of flow technology by a duct partition 29 which is arranged essentially perpendicular to the ventilation grille 18 and which is formed from sound-resistant material at its end sections 30 and 31, while the intermediate section 32 consists of sound-absorbing material (e.g. open-cell foam).
  • the end section 31 is at a distance from the impeller diameter of the fan 24 opposite a wall web 33 made of sound-resistant material, which together with the end section 31 of the duct partition 29 saves an air passage for the air flow 25 sucked in by the fan 24.
  • the air flow 25 is guided both in the exhaust air duct 27 and in the supply air duct 28 in a labyrinth-like air path 34 (for the exhaust air duct 27, the representation of the air flow 25 has been omitted for the sake of clarity).
  • the labyrinth is formed from mutually spaced, sound-absorbing cuboid individual elements 35 which are arranged essentially perpendicular to the side walls delimiting the supply air duct 28 and the exhaust air duct 27.
  • the individual elements 35 are arranged within the supply air duct in such a way that their mutually facing ends 36 overlap and their wall surfaces 37 together on the overlapping ends 36 form the labyrinthine airway 34.
  • the arrangement of the individual elements 35 which are formed, for example, from open-pore foam and designed as molded parts, deflects the symbolically represented air flow 25 several times, the distances between the individual elements 35 being selected such that only a negligible pressure drop occurs in the air flow 25 within the labyrinthine air path 34.
  • the arrangement of the labyrinth-like airway 34 represents a sound path 38 for the sound waves emanating from the device assemblies, in particular from the compressor 23 and the fan 24 (symbolically represented by arrows for the exhaust air duct 27), on the basis of which the sound energy emanating from the device assemblies mentioned is repeated Reflection within the labyrinthine airway 34 on the sound-absorbing individual elements 35 is converted almost completely into thermal energy, so that only a small percentage of the original noise emission of the equipment units emerges from the unit space 21.
  • the reduction in noise emissions is additionally supported by the fact that the labyrinth-like airway 34 used for sound destruction is set back at a distance from the air outlet openings 19 arranged in the ventilation grille 18, in the case of the exhaust air duct 27 as exhaust air openings and in the case of the supply air duct 28 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

A refrigerator has a thermally insulated housing containing the storage chambers and the machinery in the base below them. There is a flow channel for the air leading to the machinery, driven by a fan(24) between the condenser(22) and the compressor(23). Interrupting the air path (34) are blocks of noise absorbing material, located so as to make the air path labyrinth-like but without restricting it. The blocks protrude from the side walls of the base and the divider wall (32) in the middle so that their free ends overlap. The path on each side has at least pair of blocks protruding from the side wall, sandwiching one block from the divider wall.

Description

Die Erfindung betrifft ein Kältegerät, insbesondere ein Kühl- oder Gefriergerät mit wenigstens einem innerhalb seines wärmeisolierenden Gehäuses angeordneten und von einer Tür verschließbaren Kälteraum, sowie einem zur Aufnahme von Geräteaggregaten, wie Ventilator, Verflüssiger und Verdichter dienenden Aggregateraum, innerhalb welchem ein wenigstens an eine Zuluft- und eine Abluftöffnung angeschlossener, als Strömungskanal zur Aufnahme der Geräteaggregate ausgebildeter Luftweg vorgesehen ist, welcher mit zuluftseitig den Geräteaggregaten vorgeschalteten und abluftseitig diesen nachgeschalteten schalldämmenden Mitteln versehen und vom Ventilator mit Kühlluft beaufschlagt ist.The invention relates to a refrigeration device, in particular a refrigerator or freezer with at least one cold space arranged within its heat-insulating housing and closable by a door, and to a unit space for accommodating device assemblies, such as a fan, condenser and compressor, within which at least one supply air is supplied - And an exhaust air port connected, designed as a flow channel for receiving the device assemblies, is provided, which is provided with upstream of the device assemblies on the supply side and these downstream sound-absorbing means and is supplied with cooling air by the fan.

Aus dem DE-GM 92 06 167 ist ein Kältegerät bekannt, welches unterhalb seines als Nutzraum dienenden Kälteraums mit einem Sockel ausgestattet ist, in dessen von seinen Wänden umgrenzten Raum eine U-förmig geformte Luftkanalanordnung vorgesehen ist. Diese dient zur Aufnahme der Geräteaggregate, wie Ventilator, Verflüssiger und Verdichter und weist sowohl eine Zuluft- als auch eine Abluftöffnung auf, welche jeweils mit schalldämmenden Mitteln zur Reduzierung des vom Ventilator und vom Verdichter ausgehenden und über den Luftweg sich fortpflanzenden Geräusches ausgestattet ist.From DE-GM 92 06 167 a refrigeration device is known, which is equipped below its cold room serving as a useful space with a base, in the space bounded by its walls a U-shaped air duct arrangement is provided. This is used to hold the device units, such as fans, condensers and compressors, and has both a supply air and an exhaust air opening, each of which is equipped with sound-absorbing means for reducing the noise emanating from the fan and the compressor and propagating via the airway.

Durch eine derartige Lösung wird zwar eine wesentliche Geräuschdämmung des Luftschalls, verursacht durch die Geräteaggregate, bewirkt, jedoch ist es unvermeidbar, daß die als Matten ausgebildeten schalldämmenden Mittel im Laufe der Zeit erheblich verschmutzen, so daß ihr Strömungswiderstand deutlich ansteigt und somit eine ausreichende Kühlung des Verflüssigers und des Verdichters nicht mehr gewährleistet ist. Um dies zu vermeiden, wurde gemäß dem Gebrauchsmuster vorgeschlagen, in der Luftkanalanordnung eine Meßeinrichtung zur Feststellung des Überdruckes vorzusehen, welche gleichzeitig beim Ansteigen des Überdruckes signalisiert, daß die Luftdurchlässigkeit der schalldämmenden Matten durch deren Verschmutzung deutlich verringert ist und diese somit zu erneuern sind.With such a solution, a substantial noise insulation of the airborne noise caused by the device aggregates is effected, but it is inevitable that the soundproofing means designed as mats become considerably dirty over time, so that their flow resistance increases significantly and thus sufficient cooling of the Condenser and the compressor is no longer guaranteed. To avoid this, it was proposed according to the utility model to provide a measuring device in the air duct arrangement for determining the overpressure, which at the same time signals when the overpressure rises that the air permeability of the sound-absorbing mats is significantly reduced by their soiling and these must therefore be replaced.

Derartige Gerauschdämm-Maßnahmen bedingen einerseits oftmals technisch aufwendige, in den Gerätekosten sich nicht unerheblich niederschlagende Zusatzausstattungen in Form von Meßeinrichtungen und andererseits ständig wiederkehrende, vom Geräteaufstellort abhängige Wartungsmaßnahmen. Diese wiederum sind oftmals von technisch weniger versierten Personen nicht selbst durchführbar, so daß dieser Personenkreis noch neben der Wartungsmaßnahme an sich noch mit oftmals kostenintensiven Kundendienstleistungen beaufschlagt ist.Such noise insulation measures often require technically complex additional equipment in the form of measuring devices, which is not inconsiderably reflected in the device costs, and, on the other hand, constantly recurring maintenance measures that depend on the device installation location. These, in turn, are often not feasible by technically less experienced people themselves, so that this group of people, in addition to the maintenance measure itself, is often provided with cost-intensive customer service.

Der Erfindung liegt die Aufgabe zugrunde, für ein Kältegerät gemäß dem Oberbegriff des Anspruches 1 schalldämmende Maßnahmen vorzuschlagen, welche bei einem einfachen Aufbau eine hohe Funktionalität aufweisen und bei welchen gleichzeitig eine ausreichende Belüftung der Geräteaggregate langzeitig gesichert ist.The invention has for its object to propose soundproofing measures for a refrigerator according to the preamble of claim 1, which have a high functionality with a simple structure and at the same time adequate ventilation of the device aggregates is ensured for a long time.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die schalldämmenden Mittel in überwiegendem Maße aus schalläbsorbierendem Material gebildet sind und wenigstens abschnittsweise zu einem labyrinthähnlichen Luftweg für die vom Ventilator umgewälzte Kühlluft angeordnet sind, welche innerhalb des labyrinthähnlichen Luftweges im wesentlichen ungehemmt zu strömen vermag.This object is achieved according to the invention in that the sound-absorbing means are formed predominantly from sound-absorbing material and are arranged at least in sections to form a labyrinth-like air path for the cooling air circulated by the fan, which is able to flow essentially uninhibited within the labyrinth-like air path.

Durch die erfindungsgemäße Lösung ist eine Durchströmung der schalldämmenden Mittel vermieden und somit eine nahezu strömungswiderstandsfreie Schalldämmung bereitgestellt, an welcher nahezu kein zu Stauwirkungen und somit zu Kühleinbußen führenden Druckverlust im Kühlluftstrom hervorgerufen ist. Außerdem können bei einer derartigen Lösung neben aufwendigen, die Durchlaßfähigkeit der schalldämmenden Mittel überwachenden Einrichtungen auch ständig wiederkehrende Wartungsmaßnahmen entfallen. Ferner ist es durch die erfindungsgemäße Lösung möglich, die geräuschdämmende Wirkung der Schalldämmung, sei es durch entsprechende Materialwahl oder durch eine Vielzahl von aneinandergereihten Läbyrinthabschnitten, ohne merklich Einbuße der Kühlluftleistung beliebig zu variieren, wobei sich die schalldämmende Wirkung zusätzlich durch eine Vielfalt von unterschiedlichen Labyrinthaufbauten wirksam beeinflussen läßt.The solution according to the invention avoids a flow through the sound-absorbing means and thus provides an almost flow-resistant sound insulation, on which there is almost no pressure loss in the cooling air flow which leads to congestion effects and thus to cooling losses. In addition, in the case of such a solution, in addition to complex devices which monitor the permeability of the sound-absorbing means, there is also no need for constantly recurring maintenance measures. Furthermore, it is possible through the solution according to the invention to vary the noise-reducing effect of sound insulation, be it through appropriate choice of material or through a large number of rows of labyrinth sections, without any noticeable loss of cooling air performance, the sound-insulating effect also being effective through a variety of different labyrinth structures can influence.

Besonders vielseitig hinsichtlich seines Aufbaus variierbar und besonders leicht hinsichtlich seiner schalldämmenden Wirksamkeit beeinflußbar ist der labyrinthähnliche Luftweg, wenn nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der labyrinthähnliche Luftweg im wesentlichen durch die Wandflächen von wechselseitig hintereinander mit Abstand zueinander, entlang von Wandung 20, 32 des als Strömungskanal 26 ausgebildeten Luftweges angeordneten, schallabsorbierenden Einzelelementen gebildet ist, deren einander zugewandte Enden sich überlappen.The labyrinth-like airway is particularly versatile in terms of its structure and particularly easy to influence in terms of its sound-absorbing effectiveness if, according to a further advantageous embodiment of the object of the invention, it is provided that the labyrinthine Airway is essentially formed by the wall surfaces of mutually one behind the other at a distance from one another, along wall 20, 32 of the airway designed as flow channel 26, sound-absorbing individual elements, the mutually facing ends of which overlap.

Besonders einfach aufgebaut und dennoch mit ausreichender schalldämmender Wirksamkeit ausgestattet ist der labyrinthähnliche Luftweg, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der labyrinthähnliche Luftweg durch die Wandungen von wenigstens zwei wechselseitig mit Abstand hintereinander angeordneten, schallabsorbierenden Einzelelementen gebildet ist, deren einander zugewandte Enden sich überlappen.The labyrinth-like airway is particularly simple and yet has sufficient sound-absorbing effectiveness if, according to a next advantageous embodiment of the object of the invention, it is provided that the labyrinth-like airway is formed by the walls of at least two mutually spaced, sound-absorbing individual elements, whose mutually facing ends overlap.

Ein besonders gleichmäßiger Strömungsquerschnitt innerhalb des labyrinthähnlichen Luftweges ist erzielbar, wenn nach einer weiteren bevorzugten Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die den labyrinthähnlichen Luftweg bildenden Wandungen der Einzelelemente in parallelem Abstand zueinander angeordnet sind.A particularly uniform flow cross section within the labyrinth-like airway can be achieved if, according to a further preferred embodiment of the object of the invention, it is provided that the walls of the individual elements forming the labyrinthine airway are arranged at a parallel distance from one another.

Besonders leicht zu einem labyrinthähnlichen Luftweg anordenbar sind die schallabsorbierenden Einzelelemente, wenn diese nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung als quaderförmige Formteile ausgebildet sind. Ferner ist es durch diese Ausbildung der Einzelelemente möglich, diese in die Aufbautechnik für den Aggregateraum mit tragenden Funktionen zu integrieren.The sound-absorbing individual elements can be arranged particularly easily to form a labyrinth-like airway if, according to a further advantageous embodiment of the object of the invention, they are designed as cuboid shaped parts. Furthermore, this design of the individual elements makes it possible to integrate them into the construction technology for the assembly room with load-bearing functions.

Ein besonders platzsparender Aufbau für einen labyrinthähnlichen Luftweg ergibt sich, wenn entsprechend einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die quaderförmigen Einzelelemente zur Ausbildung des labyrinthähnlichen Luftweges im wesentlichen senkrecht zu den Wandungen des Strömungskanales angeordnet sind.A particularly space-saving structure for a labyrinth-like airway is obtained if it corresponds to another preferred embodiment of the object of the invention it is provided that the cuboid-shaped individual elements for forming the labyrinth-like airway are arranged substantially perpendicular to the walls of the flow channel.

Gemäß einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß der labyrinthähnliche Luftweg mit Abstand zu der Zuluft-und der Abluftöffnung des Strömungskanals angeordnet ist.According to a further preferred embodiment of the object of the invention, it is provided that the labyrinth-like airway is arranged at a distance from the supply air and exhaust air openings of the flow channel.

Durch eine derartige Maßnahme ist sichergestellt, daß über die Zuluftöffnung die Kühlluft breitgefächert eintreten und über die Abluftöffnung die Abluft ebenso breitgefächert und unbehindert austreten kann. Außerdem wird der von den Geräuschquellen, wie Ventilator und Verdichter ausgehende Schall nicht erst unmittelbar vor einer möglichen Bedienperson des Kältegeräts sondern vorab weggedämmt, so daß diese Bedienperson keinem unnötigen Lärmpegel ausgesetzt ist.Such a measure ensures that the cooling air can enter a wide range via the supply air opening and that the exhaust air can also exit wide and unobstructed via the exhaust air opening. In addition, the sound emanating from the noise sources, such as the fan and compressor, is not attenuated immediately in front of a possible operator of the refrigerator, but in advance, so that this operator is not exposed to unnecessary noise levels.

Besonders zweckmäßig ist ein Strömungskanal ausgestaltet, wenn nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß wenigstens eine längs der Strömungsrichtung der Kühlluft verlaufende Seitenwand des Strömungskanals im Bereich des labyrinthähnlichen Luftweges mit schallabsorbierendem Material ausgekleidet ist.A flow duct is particularly expedient if, according to a further advantageous embodiment of the object of the invention, it is provided that at least one side wall of the flow duct running along the flow direction of the cooling air is lined with sound-absorbing material in the region of the labyrinthine airway.

Gemäß einer letzten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß der Strömungskanal eine U-förmige Kontur aufweist und sein Zuluftabschnitt von seinem Abluftabschnitt durch eine schallabsorbierende Zwischenwand voneinander getrennt sind.According to a last preferred embodiment of the subject matter of the invention, it is provided that the flow channel has a U-shaped contour and its supply air section is separated from its exhaust air section by a sound-absorbing partition.

Durch eine derartige Lösung ist mit einem einzigen Arbeitsschritt sowohl eine Längsseite des Zuluft- als auch des Abluftkanals mit den Lärmpegel heruntersetzenden, schalldämmenden Material ausgestattet.With such a solution, both the longitudinal side of the supply air and exhaust air ducts are equipped with the noise-reducing, sound-absorbing material in a single step.

Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in der beigefügten Zeichnung vereinfacht dargestellten Ausführungsbeispieles erläutert. Es zeigen:

Fig. 1
den unteren Abschnitt eines in eine Nische einer Küchenzeile eingesetzten, bei geöffneter Tür dargestellten Unterbau-Gefrierschranks, mit einem seine Geräteaggregate aufnehmenden, in den Sockel der Küchenzeile integrierten Gerätesockel, in raumbildlicher Darstellung von vorne und
Fig. 2
in einer gegenüber Fig. 1 vergrößerten, schematischen Darstellung den Gerätesockel des Unterbau-Gefrierschranks mit den Geräten in Ansicht von oben, gemäß der Schnittlinie II-II.
The invention is explained in the following description with reference to an embodiment shown in simplified form in the accompanying drawing. Show it:
Fig. 1
the lower section of a built-in freezer in a niche of a kitchen unit, shown with the door open, with a unit base that accommodates its device aggregates, integrated into the base of the kitchen unit, in a spatial representation from the front and
Fig. 2
in an enlarged, compared to Fig. 1, schematic representation of the base of the built-in freezer with the devices in a view from above, according to the section line II-II.

Gemäß Fig. 1 ist der untere Abschnitt einer Küchenzeile 10 schematisch angedeutet, welche eine Nische 11 zum Einbau eines Unterbau-Gefrierschrankes 12 aufweist. Dieser ist mit einem von einer wärmeisolierten Tür 13 verschließbaren, in herkömmlicher Weise wärmeisolierten Gefrierraum 14 ausgestattet, welcher von der nicht dargestellten, in Abständen übereinander angeordneten Verdampfer-Etageren gekühlt ist. In den durch den Abstand zwischen den Verdampferetageren gebildeten Zwischenraum sind zur Einlagerung von Gefriergut dienende schubladenartige Behälter 15 einbringbar, welche mittels einer nicht näher bezeichneten Handhabe bedarfsweise aus dem Gefrierraum 14 entnehmbar sind. Unterhalb dem Gefrierraum 14, an diesen anschließend, thermisch jedoch durch den Boden des Gefrierraums 14 davon getrennt, ist ein Gerätesockel 16 vorgesehen.1, the lower section of a kitchenette 10 is indicated schematically, which has a niche 11 for installing a built-in freezer 12. This is equipped with a freezing space 14 which can be closed by a heat-insulated door 13 and which is heat-insulated in a conventional manner and which is cooled by the evaporator tier, which is not shown and is arranged at intervals one above the other. In the space formed by the distance between the evaporator shelves, drawer-like containers 15 serving for the storage of frozen goods can be introduced, which can be used if necessary by means of a handle (not specified) can be removed from the freezer compartment 14. A device base 16 is provided below the freezer compartment 14, adjoining it, but thermally separated from it by the bottom of the freezer compartment 14.

Wie insbesondere aus Fig. 2 hervorgeht, weist der Gerätesockel 16 einen Sockelboden 17 auf, von dessen seitlichen Rändern zum Boden des Gefrierraums 14 gerichtete, einen Sockelraum umschließende Sockelwandungen angeordnet sind. Von denen ist die der Tür 13 zugewandte frontseitige Sockelwandung als abnehmbar gehaltertes Lüftungsgitter 18 mit gitterförmig unterteilten Luftdurchlaßöffnungen 19 ausgebildet, während die verbleibenden Sockelwandungen als durchgehend verlaufender Wandungszug 20 ausgebildet sind, welcher an den Sockelboden 17 mitangeformt sind und auf diese Weise zusammen mit diesem ein einstückiges Formteil bilden, welches beispielsweise aus Kunststoff-Spritzguß hergestellt ist. Der durch das Lüftungsgitter 18 und den durchgehend verlaufenden Wandungszug 20 umgrenzte Sockelraum dient dabei als Aggregateraum 21 zur Aufnahme von gegenüber dem Lüftungsgitter 18 in seinem rückwärtigen Bereich angeordneten Geräteaggregaten, wie einem Verflüssiger 22, einen Verdichter 23 und einen zwischen diesen beiden angeordneten Ventilator 24. Dieser erzeugt bei seinem Betrieb einen Luftstrom 25 (gestrichelt dargestellt), der in Pfeilrichtung zirkuliert, so daß der Verflüssiger 22 zu seiner Kühlung im druckseitigen Abschnitt des Luftstromes 25 liegt, während der Verdichter 23 zu seiner Kühlung vom saugseitigen Abschnitt des Luftstromes 25 überstrichen ist. Der Luftstrom 25 ist innerhalb des Aggregateraums 21 in einem als Luftweg dienenden, U-förmig ausgebildeten Strömungskanal 26 geführt, innerhalb dessen im rückwärtigen Bereich des Aggregateraums 21 angeordneten, durch die beiden Schenkel des U-Profils verbindenden Joch gebildeten Kanalabschnitt die Geräteaggregate angeordnet sind. Die an diesen Kanalabschnitt anschließenden, durch die Schenkel des U-Profils gebildeten Kanalabschnitte, von denen der in Strömungsrichtung des Luftstroms 25 nach dem Verflüssiger 22 angeordnete Kanalabschnitt als Abluftkanal 27 und der in Strömungsrichtung des Luftstroms 25 vor dem Verdichter 23 liegende Kanalabschnitt als Zuluftkanal 28 dient. Die beiden, als Abluftkanal 27 bzw. als Zuluftkanal 28 dienenden Kanalabschnitte sind strömungstechnisch voneinander durch eine Kanaltrennwand 29 getrennt, welche im wesentlichen senkrecht zum Lüftungsgitter 18 angeordnet ist und welche an seinen Endabschnitten 30 und 31 aus schallhartem Material gebildet ist, während der dazwischenliegende Mittelabschnitt 32 aus schallabsorbierendem Material (z.B. offenporigem Schaum) besteht. Dem Endabschnitt 31 liegt im Abstand des Flügelrad-Durchmessers des Ventilators 24 ein aus schallhartem Material gebildeter Wandungssteg 33 gegenüber, welcher zusammen mit dem Endabschnitt 31 der Kanaltrennwand 29 einen Luftdurchlaß für den vom Ventilator 24 angesaugten Luftstrom 25 freispart.As can be seen in particular from FIG. 2, the appliance base 16 has a base base 17, from the side edges of which are arranged toward the base of the freezer compartment 14, surrounding a base space. Of which the door 13 facing the front plinth wall is designed as a detachably held ventilation grille 18 with lattice-shaped divided air passage openings 19, while the remaining plinth walls are designed as a continuous wall train 20, which is molded onto the plinth floor 17 and in this way together with it in one piece Form molding, which is made for example from plastic injection molding. The base space delimited by the ventilation grille 18 and the continuous wall line 20 serves as an aggregate space 21 for accommodating device assemblies, such as a condenser 22, a compressor 23 and a fan 24 arranged between the two in relation to the ventilation grille 18 in its rear area generates during its operation an air flow 25 (shown in dashed lines) which circulates in the direction of the arrow, so that the condenser 22 for cooling lies in the pressure-side section of the air flow 25, while the compressor 23 is swept by the suction-side section of the air flow 25 for its cooling. The air flow 25 is guided within the unit space 21 in a U-shaped flow channel 26 serving as an airway, within which is arranged in the rear area of the unit space 21, through the two legs of the U-profile connecting yoke formed channel section, the equipment units are arranged. The duct sections adjoining this duct section and formed by the legs of the U-profile, of which the duct section arranged downstream of the condenser 22 in the flow direction of the air flow 25 serves as an exhaust air duct 27 and the duct section lying upstream of the compressor 23 in the flow direction of the air flow 25 serves as a supply air duct 28 . The two duct sections, which serve as the exhaust air duct 27 and the supply air duct 28, are separated from each other in terms of flow technology by a duct partition 29 which is arranged essentially perpendicular to the ventilation grille 18 and which is formed from sound-resistant material at its end sections 30 and 31, while the intermediate section 32 consists of sound-absorbing material (e.g. open-cell foam). The end section 31 is at a distance from the impeller diameter of the fan 24 opposite a wall web 33 made of sound-resistant material, which together with the end section 31 of the duct partition 29 saves an air passage for the air flow 25 sucked in by the fan 24.

Der Luftstrom 25 ist sowohl im Abluftkanal 27 als auch im Zuluftkanal 28 in einem labyrinthartig ausgebildeten Luftweg 34 geführt, (für den Abluftkanal 27 ist auf die Darstellung des Luftstromes 25 der Übersicht halber verzichtet worden). Das Labyrinth ist dabei aus wechselseitig im Abstand hintereinander angeordneten, schallabsorbierenden quaderförmigen Einzelelementen 35 gebildet, welche im wesentlichen senkrecht zu den den Zuluftkanal 28 und den Abluftkanal 27 begrenzenden Seitenwandungen angeordnet sind. Innerhalb des Zuluftkanals sind die Einzelelemente 35 dermaßen angeordnet, daß deren einander zugewandte Enden 36 sich überlappen und deren Wandflächen 37 zusammen auf den sich überlappenden Enden 36 den labyrinthartigen Luftweg 34 ausbilden. Durch die Anordnung der beispielsweise aus offenporigem Schaum gebildenten, als Formteile gestalteten Einzelelemente 35 wird der symbolisch dargestellte Luftstrom 25 mehrmals umgelenkt, wobei die Abstände zwischen den Einzelelementen 35 derart gewählt sind, daß innerhalb des labyrinthartigen Luftweges 34 nur ein vernachlässigbarer Druckabfall im Luftstrom 25 auftritt. Die Anordnung des labyrinthartigen Luftweges 34 stellt für die von den Geräteaggregaten, insbesondere vom Verdichter 23 und vom Ventilator 24 ausgehenden Schallwellen einen Schallweg 38 dar (mit aneinander anschließenden Pfeilen symbolisch für den Abluftkanal 27 dargestellt) aufgrund welchen die von den genannten Geräteaggregaten ausgehende Schallenergie durch mehrmalige Reflexion innerhalb des labyrinthartigen Luftweges 34 an den schallabsorbierenden Einzelelementen 35 nahezu vollkommen in Wärmeenergie umgewandelt wird, so daß nur ein geringer Prozentsatz der ursprünglichen Geräusch-Emission der Geräteaggregate aus dem Aggregateraum 21 austritt. Die Verringerung der Geräusch-Emission wird zusätzlich noch dadurch unterstützt, daß der zur Schallvernichtung dienende labyrinthartige Luftweg 34 im Abstand rückversetzt von den im Lüftungsgitter 18 angeordneten, im Falle des Abluftkanals 27 als Abluftöffnungen und im Falle des Zuluftkanals 28 als Zuluftöffnungen dienenden Luftdurchlaßöffnungen 19 angeordnet ist.The air flow 25 is guided both in the exhaust air duct 27 and in the supply air duct 28 in a labyrinth-like air path 34 (for the exhaust air duct 27, the representation of the air flow 25 has been omitted for the sake of clarity). The labyrinth is formed from mutually spaced, sound-absorbing cuboid individual elements 35 which are arranged essentially perpendicular to the side walls delimiting the supply air duct 28 and the exhaust air duct 27. The individual elements 35 are arranged within the supply air duct in such a way that their mutually facing ends 36 overlap and their wall surfaces 37 together on the overlapping ends 36 form the labyrinthine airway 34. The arrangement of the individual elements 35, which are formed, for example, from open-pore foam and designed as molded parts, deflects the symbolically represented air flow 25 several times, the distances between the individual elements 35 being selected such that only a negligible pressure drop occurs in the air flow 25 within the labyrinthine air path 34. The arrangement of the labyrinth-like airway 34 represents a sound path 38 for the sound waves emanating from the device assemblies, in particular from the compressor 23 and the fan 24 (symbolically represented by arrows for the exhaust air duct 27), on the basis of which the sound energy emanating from the device assemblies mentioned is repeated Reflection within the labyrinthine airway 34 on the sound-absorbing individual elements 35 is converted almost completely into thermal energy, so that only a small percentage of the original noise emission of the equipment units emerges from the unit space 21. The reduction in noise emissions is additionally supported by the fact that the labyrinth-like airway 34 used for sound destruction is set back at a distance from the air outlet openings 19 arranged in the ventilation grille 18, in the case of the exhaust air duct 27 as exhaust air openings and in the case of the supply air duct 28 .

Abweichend von dem beschriebenen und gezeigten Ausführungsbeispiel ist es auch möglich, den Aggregateraum 21 durch einstückig ausgebildetes, aus schallabsorbierendem Werkstoff erzeugten Formteil zu umgrenzen, welches ggf. hinsichtlich seiner Statik entsprechend zu verstärken ist.In a departure from the exemplary embodiment described and shown, it is also possible to delimit the aggregate space 21 by means of a one-piece molded part which is produced from sound-absorbing material and which may need to be strengthened accordingly in terms of its statics.

Claims (8)

Kältegerät, insbesondere Kühl- oder Gefriergerät mit wenigstens einem innerhalb seines wärmeisolierenden Gehäuses angeordneten und von einer Tür verschließbaren Kälteraum sowie einem zur Aufnahme von Geräteaggregaten, wie Ventilator, Verflüssiger und Verdichter dienenden Aggregateraum, innerhalb welchem ein wenigstens an eine Zuluft- und eine Abluftöffnung angeschlossener, als Strömungskanal zur Aufnahme der Geräteaggregate ausgebildeter Luftweg vorgesehen ist, welcher mit zuluftseitig den Geräteaggregaten vorgeschalteten und abluftseitig diesen nachgeschalteten schalldämmenden Mitteln versehen und vom Ventilator mit Kühlluft beaufschlagt ist, dadurch gekennzeichnet, daß die schalldämmenden Mittel in überwiegendem Maße aus schallabsorbierendem Material gebildet sind und wenigstens abschnittsweise zu einem labyrinthähnlichen Luftweg (34) für die vom Ventilator (24) umgewälzte Kühlluft (25) angeordnet sind, welche innerhalb des labyrinthähnlichen Luftweges (34) im wesentlichen ungehemmt zu strömen vermag.Refrigeration device, in particular a refrigerator or freezer with at least one cold room arranged within its heat-insulating housing and closable by a door, and a unit room for accommodating device assemblies, such as a fan, condenser and compressor, within which a room connected to at least one supply air and one exhaust air opening, As a flow channel for receiving the device assemblies, an air path is provided, which is provided with sound-absorbing means connected upstream of the device assemblies on the supply air side and downstream of these on the exhaust air side, and is supplied with cooling air by the fan, characterized in that the sound-absorbing agents are predominantly formed from sound-absorbing material and at least in sections to a labyrinth-like air path (34) for the cooling air (25) circulated by the fan (24), which are located within the labyrinth-like air path (34) is able to flow essentially uninhibited. Kältegerät nach Anspruch 1, dadurch gekennzeichnet, daß der labyrinthähnliche Luftweg (34) im wesentlichen durch die Wandflächen (37) von wechselseitig hintereinander mit Abstand zueinander entlang von Wandungen (20, 32) des als Strömungskanal (26) ausgebildeten Luftwegs angeordneten, schallabsorbierenden Einzelelementen (35) gebildet ist, deren einander zugewandten Enden (36) sich überlappen.Refrigerating appliance according to claim 1, characterized in that the labyrinth-like airway (34) essentially through the wall surfaces (37) from one another in succession at a distance from one another along walls (20, 32) of the airway designed as a flow channel (26), sound-absorbing individual elements ( 35) is formed, the mutually facing ends (36) overlap. Kältegerät nach einem der Ansprüche 1 oder 3, dadurch gekennzeichnet, daß der labyrinthähnliche Luftweg (34) durch die Wandflächen (37) von wenigstens zwei wechselseitig mit Abstand hintereinander angeordneten, schallabsorbierenden Einzelelementen (35) gebildet ist, deren einander zugewandte Enden (36) sich überlappen.Refrigerating appliance according to one of claims 1 or 3, characterized in that the labyrinth-like airway (34) is formed by the wall surfaces (37) of at least two mutually spaced, sound-absorbing individual elements (35), the mutually facing ends (36) of which overlap. Kältegerät nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die den labyrinthähnlichen Luftweg (34) bildenden Wandflächen (37) der Einzelelemente (35) in paralellem Abstand zueinander angeordnet sind.Refrigerating appliance according to one of claims 1 to 3, characterized in that the wall surfaces (37) of the individual elements (35) forming the labyrinth-like airway (34) are arranged at a parallel distance from one another. Kältegerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die schallabsorbierenden Einzelelemente (35) als quaderförmige Formteile ausgebildet und im wesentlichen über die gesamte Höhe des Aggregateraums (21) angeordnet sind.Refrigerating appliance according to one of claims 1 to 4, characterized in that the sound-absorbing individual elements (35) are designed as cuboid shaped parts and are arranged essentially over the entire height of the unit space (21). Kältegerät nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die quaderförmigen Einzelelemente (35) zur Ausbildung des labyrinthänlichen Luftweges (34) im wesentlichen senkrecht zu den Wandungen (20, 32) des Strömungskanals (26) angeordnet sind.Refrigerating appliance according to one of claims 1 to 5, characterized in that the cuboid-shaped individual elements (35) for forming the labyrinthine airway (34) are arranged substantially perpendicular to the walls (20, 32) of the flow channel (26). Kältegerät nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der labyrinthähnliche Luftweg (34) mit Abstand zu der Zuluft- und der Abluftöffnung des Strömungskanales (26) angeordnet ist.Refrigerating appliance according to one of claims 1 to 6, characterized in that the labyrinth-like air path (34) is arranged at a distance from the supply air and exhaust air openings of the flow channel (26). Kältegerät nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Strömungskanal (26) eine U-profilartige Kontur aufweist und sein Zuluftabschnitt (28) von seinem Abluftabschnitt (27) durch eine schallabsorbierende Zwischenwand (29) voneinander getrennt sind.Refrigerating appliance according to one of claims 1 to 7, characterized in that the flow channel (26) has a U-profile-like contour and its supply air section (28) is separated from its exhaust air section (27) by a sound-absorbing partition (29).
EP95117860A 1994-12-19 1995-11-13 Refrigeration apparatus, especially refrigerator or freezer Expired - Lifetime EP0718570B1 (en)

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SI9530450T SI0718570T1 (en) 1994-12-19 1995-11-13 Refrigeration apparatus, especially refrigerator or freezer

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DE4445286A DE4445286C2 (en) 1994-12-19 1994-12-19 Refrigerator
DE4445286 1994-12-19

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Also Published As

Publication number Publication date
SI0718570T1 (en) 2001-04-30
ES2154704T3 (en) 2001-04-16
EP0718570A3 (en) 1996-08-07
DE4445286C2 (en) 1998-12-24
DE59508977D1 (en) 2001-02-22
DE4445286A1 (en) 1996-06-20
EP0718570B1 (en) 2001-01-17

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