WO2012097949A2

WO2012097949A2 - Refrigeration appliance and method for producing a refrigeration appliance

Info

Publication number: WO2012097949A2
Application number: PCT/EP2011/074206
Authority: WO
Inventors: Adolf Feinauer; Michael Howe
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2011-01-17
Filing date: 2011-12-29
Publication date: 2012-07-26
Also published as: WO2012097949A3; DE102011002777A1

Abstract

The invention relates to a refrigeration appliance (1) comprising a motor chamber (3) and a cooling chamber (5), wherein a common wall region (7, 9, 19) is formed between the motor chamber (3) and the cooling chamber (5). A layer of sound-absorbent material is arranged in the common wall region (7, 9, 19).

Description

Refrigeration device and method for producing a refrigeration device

The invention relates to a refrigeration device and a method for producing a refrigeration device.

Refrigeration appliances often have a cooling circuit, in which a coolant in a cooling chamber of the refrigerator removes heat stored there refrigerated goods and emits this heat outside the refrigerator to the environment. In the cooling circuit u.a. Compressor and / or fan used in the operation of the refrigerator a

Represent noise source. Such a noise source is arranged for example in a machine room of the refrigerator and causes a major portion of the total noise of the refrigerator. The noise generated by the noise source is reflected in conventional refrigeration appliances by the reverberant surfaces in the vicinity of the engine room. As a result, it almost unchanged reaches the environment of the installation of the device, such as the kitchen. The problem of noise development by refrigeration appliances is becoming increasingly important in many areas of daily life, because the noise of a refrigeration appliance is perceived as disturbing by many consumers. Thus, a reduction of the operating noise is also aimed at household appliances. Refrigeration equipment, such as refrigeration and

Freezers, this is still a special role, as the consumer the

Can hardly influence running behavior. The refrigerator regulates the cooling circuit independently, so that the noise sources are operated independently of the consumer.

It is therefore an object of the invention to provide a concept for a quieter refrigeration device.

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 object is solved by the features of the independent claims.

Advantageous forms of further education are the subject of the dependent claims.

According to one aspect, the invention relates to a refrigeration device having a machine room and a cooling space, wherein at least one common wall area is formed between the machine room and the cooling room. In the common wall area, a layer of sound-absorbing material is arranged.

For example, a noise source is arranged in the engine room. By forming the common wall area with a layer of sound-absorbing material is achieved that parts of the noise, which of the

Sound source radiated and discharged to the environment, can reduce. The common wall area between engine room and refrigerator but serves in addition to the sound attenuation of a thermal insulation of the refrigerator, which is ensured by the thickness of the layer of sound-absorbing material.

In particular, in the proposed arrangement can be dispensed with at least a portion of a heat-insulating layer in the common wall area.

For example, the noise source is formed in the engine room as a compressor or fan or as a combination of compressor and fan. The compressor compresses the refrigerant which has become gaseous in the evaporator and transports it further to the condenser or condenser, which is arranged outside the cooling region of the refrigeration appliance. During operation of the compressor, additional heat can be generated, which in some cases can cause heat loss

Embodiments with support of the fan from the engine room

is transported away. However, even in other areas of the refrigerator

Heat sources be present, in which a heat dissipation with fan support is provided. The engine room can also be a fan housing in this case.

According to one embodiment, the layer of sound-absorbing material forms an uppermost layer of the common wall area facing the machine room. The wall area is constructed, for example, multi-layered. At the present

Embodiment meets the sound of the noise source in the engine room directly on the layer of sound-absorbing material, so that the intensity of the sound through the sound-absorbing properties is reduced before it leaves the engine room.

According to a further embodiment, a layer thickness of the layer of sound-absorbing material corresponds to at least half of the wall thickness of the common wall area.

For example, the common wall area additionally comprises a layer of heat-insulating material. The layer of heat-insulating material is

Preferably arranged in a cooling space opposite to the layer of the common wall region to the function of a part of the heat insulation of the

To take over the refrigerator. However, since the common wall area is preferably formed predominantly with the sound-absorbing material, the sound-absorbing material also assumes part of the thermal insulation effect for the cooling space. A ratio of respective layer thicknesses of heat-insulating material and sound-insulating material results depending on the respectively selected materials and the total wall thickness of the common wall region. For example, the layer of sound-absorbing material adjoins the layer of heat-insulating material. Thus, these two layers can essentially form the structure of the common wall area.

The heat-insulating material includes, for example, any of the following, or a combination of the following: foamed plastic, polyurethane, polystyrene, a vacuum insulating panel, VIP. The common wall region can also be formed essentially exclusively by the sound-absorbing material. For example, the layer of sound-absorbing material in the common wall region is in contact with an inner wall of the cooling space, in particular a non-heat-insulated inner wall of the cooling space. Usually, a cold room on a smooth inner wall of hygienic material harmless, which is designed as a thin plastic wall. Thus, in the common wall area no separate layer of heat-insulating material, but only the layer of sound-absorbing material is provided. The layer of sound-absorbing material in this case assumes both the function of noise reduction and thermal insulation.

According to a further embodiment, the sound-absorbing material comprises one of the following or a combination of the following: cardboard, papier mache, foamed plastic, polyurethane, polystyrene, polyester, fiber material. In particular, it is advantageous that a material is selected for the sound-absorbing material, which consists of light, but stimulated by the sound to vibrate and mutually attenuated moving particles. This can be achieved with the materials listed above.

According to a further embodiment, the sound-absorbing material has a sound-absorbing form, in particular a sound-absorbing surface.

For example, the material of the noise source facing projections on which the sound of the noise source is reflected several times, the sound intensity is reduced with each reflection by the sound-absorbing properties of the material. For example, the projections are pyramidal, conical or wedge-shaped.

According to a further embodiment, the layer of sound-absorbing material has a layer thickness of at least 50 mm, in particular of at least 75 mm. An absorption effect of sound-absorbing material is usually thickness-dependent. Due to the proposed layer thickness of at least 50 mm, a satisfactory absorption effect can be achieved. In addition, the heat-insulating properties of the layer improve with increasing layer thickness. This is particularly favorable if no or only a thin layer of heat-insulating material is provided in the common wall area.

According to a further embodiment, the sound-absorbing material is suitable for the absorption of frequencies in a predetermined frequency range, in particular of frequencies in the range of 100 Hz to 500 Hz. This suitability arises, for example, by the choice of sound-absorbing material. In addition, the absorption for low frequencies can be improved by choosing a corresponding layer thickness. In particular, the absorption effect for low frequencies increases with increasing layer thickness of the sound-absorbing material. According to a further embodiment, a plurality of common wall areas between the machine room and the cooling room form a niche of the machine room. The common wall regions each comprise a layer of sound-absorbing material which has a layer thickness which corresponds to at least half the wall thickness of the respective common wall region. Through the formation of all common wall areas between the refrigerator and the engine room of predominantly sound-insulating material, a further improved

Noise insulation of the refrigerator can be achieved without neglecting the thermal insulation of the refrigerator.

According to a further aspect, the invention relates to a method for producing a refrigeration device. In this case, a machine room and a refrigerator are formed in the refrigerator. In at least one common wall area between the

Engine room and the refrigerator is formed a layer of sound-absorbing material.

According to the above-proposed embodiments, compared with a conventional refrigerating appliance, in their thickness at least one common wall area between the refrigerating space and the machine room of the refrigerating appliance, a heat insulating layer which is usually present is reduced in thickness or completely omitted. The thereby omitted thermal insulation of the refrigerator is through the layer of

absorbed sound-absorbing material. The volume of the sound absorbing material does not or only insignificantly reduces the size of the engine room since it can be mounted in the area of the thermal insulation that has been removed.

Further embodiments will be explained with reference to the accompanying drawings. Show it:

Fig. 1 shows an exemplary embodiment of a refrigeration device with a

Engine room and a refrigerator,

Fig. 2 is a horizontal cross-section of an exemplary embodiment of a

Refrigeration device, 3 shows a first exemplary detailed view of a refrigeration device, and FIG. 4 shows a second exemplary detail view of a refrigeration device. Fig. 1 shows an exemplary embodiment of a refrigeration device 1 with a

Engine room 3 and a refrigerator 5 in a sectional view. Between the

Engine room 3 and the cooling chamber 5 are common wall portions 7, 9 are formed, which have on the machine room 3 side facing respective layers 11, 12 of sound-absorbing material. On the side facing the cooling chamber 5, the common wall regions 7, 9 have a respective layer 13, 14 of heat-insulating material. Such heat-insulating material is also provided in an insulating layer 15 in the bottom, top and rear wall region of the cooling space 5. At the front of the refrigerator, a door 16 is indicated, which also includes a layer 17 of heat-insulating material.

As described above, the common wall areas 7, 9 between machine room 3 and cooling space 5 comprise the layers 11, 12, 13, 14, wherein a wall thickness of the common wall areas 7, 9 is essentially determined by the layer thicknesses of the layers 11 and 13 or 12 and 14 is formed. The layer thicknesses of the layers 11, 12 are greater than the layer thicknesses of the layers 13, 14. In particular, the

Layer thicknesses of the layers 11, 12 preferably each greater than half the wall thicknesses of the common wall portions 7, 9.

In the engine room 3, a noise source, such as a compressor and / or a fan may be arranged, which is not shown here only for reasons of clarity. The sound emitted by such a noise source is reduced in its intensity by the sound-absorbing properties of the layers 11, 12, so that less noise is emitted from the refrigeration device 1 to the environment.

The heat-insulating layers 13, 14, 15, 17 are formed, for example, by a foamed plastic such as polyurethane or polystyrene. Alternatively or additionally, vacuum insulation panels may also be used in the layers 13, 14, 15, 17 become. The sound-absorbing material of the layers 11, 12 includes, for example, cardboard and / or papier-mache. Alternatively or additionally, the sound-absorbing material also comprises a foamed plastic and / or a fiber material. As plastics, for example, polyurethane, polystyrene and polyester for the

use sound absorbing material.

The heat insulating effect of the layers 13, 14 is lower compared to the layer 15 because of the reduced layer thickness. This is compensated by the thickness of the layers 11, 12, which can fulfill the task of heat insulation in addition to the sound absorption. As a result, both sound absorption and heat insulation in the common wall regions 7, 9 can be achieved without the wall thickness of the

Areas 7, 9 compared to a conventional refrigerator or compared to the layer 15 to increase significantly.

Fig. 2 shows another embodiment of a refrigeration device 1 in one

Cross-sectional view from above. The engine room 3 is here formed by common wall areas 9, 19 between the engine room 3 and the refrigerator compartment 5 and the common wall area 7 not shown here as a niche. The common wall region 19 comprises in analogy to the wall regions 7, 9 a layer 21 of sound-absorbing material and a layer 23 of heat-insulating material. The layer thickness of the layer 21 is in this case again greater than half of the

Wall thickness of the common wall area 19.

In a combination of the embodiments shown in FIG. 1 and FIG. 2, all the common wall regions 7, 9, 19 forming layers 1, 12, 21 forming the niche of the machine room 3 have a predominant part of the respective wall thickness of the common wall region 7, 9, 19 make out. As a result, with appropriate dimensioning of the layer thicknesses of the layers 11, 12, 21 a sufficient

Heat insulation effect and a reduced noise emission of the refrigerator 1 achieved. Fig. 3 shows a detail of an alternative embodiment for the common

Wall areas between the machine room 3 and the cooling space 5 of a refrigeration device 1. In this embodiment, the cooling space 5 has a non-heat-insulated inner wall 25, which is continuous over the heat-insulating layers 15 and the common Wall portions 7, 9 extends. Accordingly, the common wall regions 7, 9 comprise the layer 11 or 12 of sound-absorbing material and the inner wall 25, with which the layers 1 1, 12 are in contact. In other words, in the common

Wall regions 7, 9 except the layers 1 1, 12 provided no additional heat insulation. This is fulfilled by the layers 11, 12 of sound-absorbing material. This will u.a. achieved that little volume of the engine room 3 is consumed by additional materials.

4 shows a detailed view of a further embodiment of a refrigeration device 1 in the region between the machine room 3 and the refrigerator compartment 5. In this exemplary embodiment, the common wall sections 7, 9 each have a layer of sound-absorbing material 11, 12 in analogy to the embodiment in FIG and a layer of heat-insulating material 13, 14. The sound-absorbing material of the layers 11, 12 comprises a sound-absorbing form, in particular by the

Surface structure of the material is given. The surface of the sound-absorbing material shown only schematically has, for example, the interior of the machine room 3 facing pointed projections, which cause a multiple reflection of sound waves with simultaneous reduction in intensity of the sound waves.

The absorption effect of the sound-absorbing material increases with increasing layer thickness of the layers 1 1, 12, 21. In particular for low frequencies in the range of 100 Hz to 500 Hz, which represent a non-negligible proportion of, for example, a compressor noise, it is therefore desirable to have layer thicknesses greater than 50 mm, in particular greater than 75 mm to choose. The choice of a higher

Layer thickness also has a positive effect on the thermal insulation capacity of the sound-absorbing material, so that a layer thickness of heat-insulating

Material in the common wall areas can be easily reduced. LIST OF REFERENCE NUMBERS

1 refrigeration device

3 engine room

5 refrigerator

7, 9 common wall area

1 1, 12 layer of sound-absorbing material

13, 14, 15 layer of heat-insulating material

16 door

17 layer of heat-insulating material 19 common wall area

21 layer of sound absorbing material

23 layer of heat-insulating material

25 inner wall

Claims

Refrigerating appliance (1) with a machine room (3) and a cooling space (5), wherein between the machine room (3) and the cooling space (5) at least one common wall area (7, 9, 19) is formed,

characterized in that in the common wall region (7, 9, 19) a layer (1 1, 12, 21) made of sound-absorbing material is arranged.

Refrigerating appliance (1) according to claim 1, characterized in that the layer (1 1, 12, 21) of sound-absorbing material forms an engine compartment (3) facing uppermost layer of the common wall portion (7, 9, 19).

Refrigerating appliance (1) according to claim 1 or 2, characterized in that a layer thickness of the layer (11, 12, 21) made of sound-absorbing material at least half of the wall thickness of the common wall region (7, 9, 19).

Refrigerating appliance (1) according to one of claims 1 to 3, characterized in that the common wall region (7, 9, 19) additionally comprises a layer (13, 14, 23) of heat-insulating material.

Refrigerating appliance (1) according to claim 4, characterized in that the layer (1 1, 12, 21) of sound-absorbing material to the layer (13, 14, 23) of heat-insulating material adjacent.

Refrigerating appliance (1) according to claim 4 or 5, characterized in that the heat-insulating material comprises one of the following or a combination of the following:

- foamed plastic;

- polyurethane;

- polystyrene;

- A vacuum insulation board.

Refrigerating appliance (1) according to one of claims 1 to 3, characterized in that the layer (11, 12, 21) made of sound-absorbing material in the common Wall region (7, 9, 19) in contact with an inner wall (25), in particular with a non-heat-insulated inner wall (25) of the cooling space (5).

8. Refrigerating appliance (1) according to one of claims 1 to 7, characterized in that the sound-absorbing material comprises one of the following or a combination of the following:

- cardboard;

- papier mache;

- foamed plastic;

- polyurethane;

- polystyrene;

- polyester;

- Fiber material.

9. Refrigerating appliance (1) according to one of claims 1 to 8, characterized in that the sound-absorbing material has a sound-absorbing form, in particular a sound-absorbing surface.

10. Refrigerating appliance (1) according to claim 9, characterized in that the

sound-absorbing form has projections, in particular pyramidal, conical or wedge-shaped projections.

11. Refrigerating appliance (1) according to one of claims 1 to 10, characterized in that the layer (11, 12, 21) made of sound-absorbing material has a layer thickness of at least 50 mm, in particular of at least 75 mm.

12. Refrigerating appliance (1) according to one of claims 1 to 11, characterized in that the sound-absorbing material for the absorption of frequencies in a predetermined frequency range, in particular of frequencies in the range of 100 Hz to 500 Hz, is suitable.

13. Refrigerating appliance (1) according to one of claims 1 to 12, characterized in that in the machine room (3) a noise source, in particular a compressor and / or a fan, is arranged.

14. Refrigerating appliance (1) according to one of claims 1 to 13, characterized in that a plurality of common wall portions (7, 9, 19) between the engine room (3) and the cooling space (5) form a niche of the engine room (3), wherein the common wall regions (7, 9, 19) each comprise a layer (11, 12, 21) of sound-absorbing material which have a layer thickness which corresponds to at least half the wall thickness of the respective common wall region (7, 9, 19).

15. A method for producing a refrigeration device (1), wherein a machine room (3) and a cooling space (5) are formed, characterized in that in at least one common wall area (7, 9, 19) between the

Engine room (3) and the cooling space (5) is a layer (1 1, 12, 21) formed of sound-absorbing material.