CN104101172A - Container apparatus for household refrigeration appliance, household refrigeration appliance, and corresponding method - Google Patents

Abstract

The invention relates to a container device (22) for a domestic refrigeration appliance (2) having a food container (1) for receiving food, which can be hermetically closed with a door (15) and which has a nitrogen gas A generating device (23) for providing a nitrogen-enriched gas mixture (24) in the inner chamber (9) of the food container (1), wherein the nitrogen generating device (23) has a a compressor (25) for compressing the gas mixture (26) and a separation unit (34) configured to separate the nitrogen-enriched gas mixture (24) from the compressed gas mixture (27), wherein the The nitrogen generating device (23) has a flow-coupled outlet (30) of the compressor (25) and an inlet (33) of the separation unit (34) for storing the compressed gas Gas box (28) for mixture (27).

Description

Container device for a domestic refrigeration appliance, domestic refrigeration appliance and corresponding method

The invention relates to a container arrangement for a domestic refrigeration appliance, which has a food container for receiving food, which can be hermetically closed with a door, and which has a nitrogen generating device for use in said A nitrogen-enriched gas mixture is provided in the interior of the food container, wherein the nitrogen generating device has a compressor for compressing the gas mixture and a separation unit configured to extract from the compressed gas mixture The nitrogen-rich gas mixture is separated. Furthermore, the invention relates to a domestic refrigeration appliance having such a container arrangement and a method for generating a nitrogen-enriched gas mixture in a food container.

The prior art already makes it possible to generate nitrogen-enriched gas mixtures, ie gas mixtures enriched in nitrogen compared to ambient air, in the food containers of refrigerators. Such nitrogen-enriched gas mixtures are known to be able to be produced by means of a separation unit (for example in the form of a membrane) by separating nitrogen from a compressed gas mixture, such as, for example, compressed air. That is, gas separation is performed to separate one side of nitrogen gas and the other side of oxygen gas from each other.

It has been found in practice that by supplying a nitrogen-enriched gas mixture in the food container, it is possible to keep the food, such as in particular fruit and vegetables, in the container fresh for a longer period of time. This is in particular because the proportion of oxygen in such gas mixtures is minimized.

A container arrangement of the type mentioned at the outset is known, for example, from EP 0 687 966 B1. Here, atmospheric air is compressed by means of a compressor, and the compressed ambient air is supplied to a membrane which produces a nitrogen-enriched gas from the compressed air. This gas is then fed into the food container.

US4961322A describes a nitrogen generating device in which a separation vessel is used for providing a nitrogen-enriched gas mixture, in which separation vessel nitrogen is separated from atmospheric air. The nitrogen-enriched gas mixture was then stored in a tank.

Furthermore, container systems with nitrogen generating devices are known from WO 2007/020581 A1, WO 2007/020585 A1 and US 2002/0033023 A1.

That is to say, in nitrogen generating devices known from the prior art, a compressor, for example an air compressor, is used, by means of which compressor the necessary pressure on the membrane is provided. However, it has turned out that in the case of some membrane types the pressure provided by means of a compressor is not sufficient to carry out an effective gas separation by means of said membrane. That is, typically a very high pressure of the compressed gas mixture is required, whereby the membrane is able to separate the nitrogen-enriched gas mixture from the compressed gas mixture. Furthermore, this situation can also be considered disadvantageous with known nitrogen generators: such nitrogen generators have a relatively high noise development. In order to be able to adjust the proportion of nitrogen in the food container accordingly, the compressor has to be started up relatively frequently, which has proven to be relatively troublesome. In other words, the compressor is switched on at relatively short time intervals in order to be able to control the proportion of nitrogen in the food container accordingly.

The object of the present invention is to provide a container arrangement as well as a refrigeration appliance and method which are improved compared to the prior art.

According to the invention, this task is solved by a container device, a domestic refrigeration appliance and a method having the features according to the corresponding independent claims. Advantageous embodiments of the invention are the subject of the dependent claims, the description and the figures.

The container arrangement according to the invention is conceived for installation in a refrigeration appliance, such as for example in a refrigerator, a freezer or a combined refrigerator-freezer. The container arrangement comprises a food container for receiving food, which food container can be hermetically closed with a door. Furthermore, the container arrangement comprises a nitrogen generating device which is designed to provide a nitrogen-enriched gas mixture in the interior of the food container. The nitrogen generator comprises a compressor for compressing a gas mixture, for example ambient air, and a separation unit which is designed to separate a nitrogen-enriched gas mixture from the compressed gas mixture. According to the invention, the nitrogen generating device comprises a gas tank for storing the compressed gas mixture, said gas tank being coupled in a flow-through manner to the outlet of the compressor and to the inlet of the separation unit.

The effect according to the invention is thus achieved by a gas tank which is connected between the compressor on the one hand and the separating unit on the other and serves to store the gas mixture compressed by the compressor. A gas box of this type has in particular the advantage that a compressed gas mixture having a very high pressure can be discharged onto the separation unit, so that the separation unit can be operated efficiently or an efficient gas separation can be carried out. Furthermore, the compressor can be operated at longer time intervals by using a gas box, so that the duration of the pauses between various points in time when the compressor is put into operation is extended compared to the prior art. In this way, for example, the compressor can be made to run for such a long time at a time until the gas box is completely filled with the compressed gas mixture, and then the control of the nitrogen fraction inside the food container can be controlled by controlling the discharge of the compressed gas mixture to the separator. The unit comes up for control without the compressor itself having to be put into operation. Overall, a user-friendly operation of the nitrogen generator can thus be achieved, since the compressor does not need to be continuously operated and the noise generation is reduced compared to the prior art.

A nitrogen-enriched gas mixture is currently understood to be a gas mixture which is enriched with nitrogen relative to the compressed gas mixture, in particular relative to atmospheric air. A gas mixture with a nitrogen fraction of at least 90%, preferably at least 95%, is preferably provided by means of the separating unit.

In one embodiment, the container arrangement includes an electronic control device, which is designed to control the compressor. The control device can include, for example, a digital signal processor and/or a microcontroller. On the one hand, the control of the compressor can be regarded as such that a complete filling process of the gas tank with the compressed gas mixture is carried out each time at predetermined time intervals. This means that the gas tank is completely filled with the compressed gas mixture each time at fixed predetermined time intervals or at fixed predetermined points in time. On the other hand, it can additionally or alternatively be provided that, when the pressure inside the gas box and/or the quantity of the compressed gas mixture falls below a predefined limit value, the compressed gas Complete filling process of the mixture filling the gas tank. In this embodiment, for example, a pressure sensor can be used, by means of which the pressure inside the gas box is sensed. Both embodiments make it possible that there is always a sufficient amount of compressed gas mixture available in the gas box and that the compressor does not have to be activated too often.

Ambient air from the environment surrounding the food container is preferably supplied to the compressor as the gas mixture to be compressed. As a result, the gas tank can be completely filled with the compressed gas mixture within a relatively short time. Furthermore, in such an open circuit fresh air is always used for generating the nitrogen and not, for example, a gas mixture already in contact with the food.

The nitrogen generating means may include a valve configured to control discharge of the compressed gas mixture from the gas tank onto the separation unit. The valve can either be arranged between the gas box and the separation unit, or it can be downstream of the separation unit in the flow direction. A reliable and operationally safe discharge of the compressed gas mixture from the gas box to the separation unit is achieved by means of such valves.

In one embodiment, it can be provided that, without an additional nitrogen tank for storing the nitrogen-enriched gas mixture, the same gas mixture is supplied directly from the separation unit to the food container. In such an embodiment, no additional tanks need to be used, so that the nitrogen generating device can be designed overall in a compact manner.

However, it can be provided in an alternative embodiment that the nitrogen generating device has a nitrogen tank coupled to the outlet of the separation unit and the inlet of the food container in a flow-through manner, and the nitrogen tank is used for storing Gas mixture of nitrogen. By providing such a nitrogen tank, a nitrogen-enriched gas mixture can be stored in the nitrogen tank, even if the gas tank is empty or is filled with a compressed gas mixture at the current point in time , the nitrogen content inside the food container can also be controlled or adjusted. Overall, therefore, an improved and particularly reliable control or adjustment of the nitrogen fraction in the food container is possible.

If the nitrogen tank is used to store a nitrogen-enriched gas mixture and a valve is arranged between the gas tank on the one hand and the nitrogen tank on the other, the control device can control the valve in such a way that at predetermined time intervals each Perform a complete filling process of the nitrogen tank with the nitrogen-enriched gas mixture. Additionally or alternatively, the control can also be such that when the pressure inside the gas box and/or the quantity of the nitrogen-enriched gas mixture falls below a predefined limit value, always A complete filling process of the gas tank with the compressed gas mixture is carried out. Both embodiments make it possible that a sufficient amount of nitrogen-enriched gas mixture is always available in the nitrogen tank so that the nitrogen fraction inside the food container can be continuously adjusted.

With regard to the configuration of the gas box and/or the nitrogen box, very different embodiments can be provided:

In one embodiment it is provided that the nitrogen tank is configured to occupy different volumes. Additionally or alternatively, the gas box can also be designed to occupy different volumes. This means in particular that the gas tank and/or the nitrogen tank are designed as volume-variable tanks. Such an embodiment of the gas tank and/or the nitrogen tank has the advantage that the tank is designed to be particularly space-saving and requires very little installation space, especially when the tank is empty. This proves to be advantageous in particular when installing refrigeration appliances, if the tank together with the container arrangement has to be carried by a relatively narrow space or door. Furthermore, such a variable-volume tank has very low noise development, thereby further improving the user-friendliness of the nitrogen generating device.

The nitrogen tank can be made at least partially, for example also completely, of a flexible material, and the nitrogen generating device can have a weight assigned to the nitrogen tank which rests on the flexible nitrogen tank. Additionally or alternatively, the gas box can also be made at least partially, for example also completely, of a flexible material, and the nitrogen generating device can have a weight assigned to the gas box, which is placed On a flexible gas box. The flexible and in particular inelastic nitrogen tank and/or gas tank can be arranged, for example together with associated weights, externally on top of the housing of the refrigeration appliance so that it is designed as a bag or as a nitrogen tank of a bag And/or the gas box is sandwiched between the housing top on one side and the associated weight on the other side. If the tank is filled with the corresponding gas mixture, the associated weight is raised in the vertical direction, so that the weight of the weight acts directly on the tank and thus creates a pressure inside the tank .

In an alternative embodiment, the gas box and/or the nitrogen box can be configured as an elastic balloon. In this embodiment, it is not necessary to use additional weights, since the balloon shrinks due to its elasticity and the pressure can only arise due to the material properties of the balloon.

Alternatively, the gas box and/or the nitrogen box can be designed as an inherently rigid and thus volume-fixed box.

Preferably, the compressor is configured as an air compressor. Such compressors may include a blower and an electric drive motor for driving the blower. As a result, the gas mixture can be compressed particularly efficiently and quickly without significant outlay.

As already explained, the separation unit can comprise a membrane which is designed to separate the nitrogen-enriched gas mixture from the compressed gas mixture. Such a membrane has the advantage that it is designed to be particularly compact, in particular compared to separation vessels or other separation devices.

Preferably, the food container is designed as a module for installation in the (in particular sealable) interior of the refrigeration appliance. In this case, it can be provided in particular that the food container can be mounted in a non-damaging detachable manner in the interior of the refrigeration appliance, so that the food container can be installed in the refrigeration appliance and can be removed again without damage. . As a result, simple retrofitting of refrigeration appliances with the container arrangement is possible.

In order to prevent an overpressure or underpressure in the interior of the food container relative to the environment or to the atmosphere, in one embodiment a valve can be integrated into the wall of the food container, which valve is designed for the food container Pressure balance between the inner chamber and the environment of the food container.

In one embodiment, the container arrangement comprises an electronic control device, which is designed to control the compressor and/or the valve and thus to regulate the nitrogen fraction inside the food container. Such a control device can include, for example, a digital signal processor and/or a microcontroller.

The control device can be designed to control the nitrogen fraction in the gas mixture inside the food container to a predetermined target value range, in particular by correspondingly controlling the valves. On the one hand, this control can be a temporal and sensorless control, i.e. it is controlled in such a way that the valve is opened each time for a predetermined duration, which is determined in such a way that within this duration it is possible to generate Desired nitrogen fraction. In this embodiment, the valve can also be opened at predetermined time intervals, so that it is always ensured that the nitrogen fraction is within a predetermined target value range. On the other hand, the nitrogen fraction can also be adjusted by using a sensor by means of which sensor senses the nitrogen fraction in the gas mixture inside the food container. Depending on the current nitrogen fraction, the control device can then adjust to a predetermined target value range. The predetermined target value range can be, for example, a range from 90% to 100%, in particular a range from 95% to 100%.

With regard to the generation of the nitrogen-enriched gas mixture it can also be provided that the same gas mixture is generated as a result of or as a result of an input by the user at the operating device. This input is then received by the control device, which in turn opens the valve as a result of the input to generate a nitrogen-enriched gas mixture in the food container. Additionally or alternatively, the control device can also be designed to detect the closing process of the door and to generate a nitrogen-enriched gas mixture in the food container after sensing the closing process.

Another aspect of the present invention relates to a container arrangement for a domestic refrigeration appliance, which has a food container for receiving food, which can be hermetically closed by means of a door, and which has a nitrogen generating device, which For providing a nitrogen-enriched gas mixture in the interior of the food container, wherein the nitrogen generating device has a compressor for compressing the gas mixture and a separation unit configured for extracting from the The compressed gas mixture is separated into a nitrogen-enriched gas mixture, wherein the nitrogen generating device has a nitrogen-enriched gas flow-coupled to the outlet of the separation unit and the inlet of the food container. A nitrogen tank for the gas mixture, and wherein the nitrogen tank is configured to occupy different volumes.

The nitrogen tank may consist at least partially of a flexible material, and the nitrogen generating device may have a weight which rests on the flexible nitrogen tank. Alternatively, the nitrogen tank can be configured as an elastic balloon.

In the container device according to the second aspect of the present invention, it may be provided that the nitrogen generating device additionally has a fluid coupling with the outlet of the compressor and the inlet of the separation unit for storing compressed Gas box for the gas mixture.

The preferred embodiments and their advantages described with respect to the container arrangement according to the first aspect of the invention apply correspondingly to the container arrangement according to the second aspect of the invention.

A domestic refrigeration appliance according to the invention comprises a container device according to the invention according to said first aspect and/or according to said second aspect. The refrigerating appliance may be a refrigerating appliance, a freezing appliance or a combination of refrigerating and freezing.

The method according to the invention is used to generate a nitrogen-enriched gas mixture in the interior of a food container by means of a nitrogen generating device, wherein the food container is hermetically closed with a door, the gas mixture (in particular ambient air) Compressing and separating the nitrogen-enriched gas mixture from the compressed gas mixture by means of a separation unit. The compressed gas mixture is stored by means of a gas tank.

According to a second aspect of the invention, the method according to the invention is used to generate a nitrogen-enriched gas mixture in the interior of a food container by means of a nitrogen generating device, wherein the food container is hermetically closed with a door, by means of The compressor compresses a gas mixture, in particular ambient air, and separates a nitrogen-enriched gas mixture from the compressed gas mixture by means of a separation unit. The nitrogen-enriched gas mixture is stored by means of nitrogen tanks, wherein the nitrogen tanks occupy different volumes.

The preferred embodiments described with respect to the container arrangement according to the invention and their advantages apply correspondingly to the refrigeration appliance according to the invention and to the method according to the invention.

Further features of the invention emerge from the claims, the figures and the description of the figures. All features and feature combinations mentioned above in the description as well as features and feature combinations mentioned below in the description of the figures and/or only shown in the figures are possible not only in the respectively specified combination, but also in the Can be used in other combinations or alone.

Now, the present invention will be further explained on the basis of various preferred embodiments and with reference to the accompanying drawings.

The accompanying drawings show:

FIG. 1 shows a schematic and three-dimensional illustration of a food container of a container device according to an embodiment of the present invention;

Figure 2 schematically shows a block diagram of a container device according to an embodiment of the present invention;

Fig. 3 schematically shows a cross-sectional view of a refrigeration appliance according to an embodiment of the present invention; and

4 to 6 schematically show refrigeration appliances according to different embodiments.

In the figures, identical or functionally identical elements are provided with the same reference signs.

The food container 1 shown in FIG. 1 can be installed in a domestic refrigeration appliance 2 ( FIG. 3 ). The food container 1 is designed as a module that can be detachably mounted in the refrigeration appliance 2 . The food container 1 comprises, for example, a housing 3 made of metal or plastic and designed in one piece, which is square and has four walls 4 , 5 , 6 , 7 . The through shell 3 is closed on its rear side by means of a cover 8 which approximately forms the rear wall of the food container 1 . The inner chamber 9 of the housing 3 is thus delimited by the walls 4 , 5 , 6 , 7 and by the cover 8 . A circumferential flange 11 is formed on the front side 10 of the housing 3 , which surrounds the front opening 12 of the housing 3 over its entire circumference or on the outer circumference. A surrounding seal 14 is arranged on the end face 13 of the surrounding flange 11 , with which the door 15 cooperates in a sealing manner in the closed state. Thus, in the closed state of the door 15, the inner chamber 9 is hermetically closed.

In this exemplary embodiment, the door 15 is connected to a drawer box 16 , which is mounted displaceably guided by guides 17 in the inner space 9 of the housing 3 . However, the present invention is not limited to this drawer configuration of the door 15 . Alternatively, the door 15 can also be mounted pivotably on the housing 3 without using a corresponding drawer box 18 .

If the door 15 is closed, it can be locked in the closed position by means of the locking device 18 in a known manner. In order to release the locking of the door 15 , the user actuates a handle 19 which is pivotably supported on the door 15 .

The food container 1 has an inlet 20 which can optionally be integrated into the lid 8 .

Optionally, a valve 21 is integrated in the food container 1 , which valve is designed for pressure equalization between the interior 9 of the food container 1 and the environment of the food container. In this exemplary embodiment, the valve 21 is integrated into the cover 8 and can alternatively also be integrated into one of the walls 4 , 5 , 6 , 7 .

A container device 22 according to an embodiment of the invention is shown in FIG. 2 . In addition to the food container 1 , the container arrangement 22 also includes a nitrogen generating device 23 for supplying a nitrogen-enriched gas mixture 24 in the interior 9 of the food container 1 . The nitrogen generating device 23 includes a compressor 25 designed as a compressor, which is supplied with ambient air 26 and which supplies a compressed gas mixture 27 , ie compressed air. The compressed gas mixture 27 is stored in a gas box 28 , the inlet 29 of which is fluidly coupled to the outlet 30 of the compressor 25 . An outlet 31 of the gas box 28 is fluidically coupled to an inlet 33 of a separation unit 34 via a controllable valve 32 . Separation unit 34 is designed as a membrane which is used for gas separation and thus for separating nitrogen-enriched gas mixture 24 from compressed gas mixture 27 .

Alternatively, a nitrogen box 35 can also be used, the inlet 36 of which is fluidly coupled to the outlet 37 of the separation unit and the outlet 38 of which is fluidly coupled to the inlet 20 of the food container 1 . If a nitrogen tank 35 is used, a valve 39 can also be used, by means of which the gas flow from the nitrogen tank 35 into the food container 1 can be controlled.

For controlling the compressor 25 , the valve 32 and the valve 39 , an electronic control unit 40 is provided, by means of which the nitrogen fraction inside the food container 1 is also controlled or regulated.

For example, the compressor 25 can be activated at predetermined time intervals in order to ensure that the gas tank 28 is always filled with the compressed gas mixture 27 . It can also be provided that the pressure inside the gas tank 28 is measured and that the compressor 25 is always activated to completely fill the gas tank 28 when this pressure falls below a predetermined limit value. As a result, the compressor 25 generally only needs to be put into operation at relatively long time intervals, so that the compressor 25 does not have to be switched on frequently.

If the nitrogen tank 35 is not used, the nitrogen fraction inside the food container 1 is now controlled by a corresponding actuation of the valve 32 . The control can be time-controlled, so that the valve 32 opens at predetermined time intervals and each time for a predetermined duration. Alternatively, regulation can also be carried out by measuring the current nitrogen fraction inside the food container 1 with the aid of the sensor 41 and then regulating this nitrogen fraction in a closed control loop to a predetermined target value range.

If nitrogen tank 35 and valve 39 are used, nitrogen tank 35 is filled with nitrogen-enriched gas mixture 24 by control of valve 32 . This filling process can also be viewed as follows: the pressure inside the nitrogen tank 35 and/or the amount of the nitrogen-enriched gas mixture 24 inside the nitrogen tank 35 is sensed by means of a sensor, and when the pressure and/or the amount is below With predetermined limit values, a complete filling process of the nitrogen tank 35 is always carried out. As a result, a predetermined minimum quantity of nitrogen-enriched gas mixture 24 is always available inside nitrogen tank 35 . The nitrogen fraction inside the food container 1 is then regulated by correspondingly controlling the valve 39 , wherein (as already explained) either a time-controlled or closed-loop regulation is possible.

Referring now to FIG. 3 , the refrigeration appliance 2 may be configured as a combined refrigerator and freezer. A one-piece or multi-part inner container or inner housing 42 a of the refrigeration appliance 2 is arranged inside the outer housing 42 . The inner container 42a can be designed in such a way that its interior is divided into three subchambers 43, 44, 45 which are arranged one above the other and each serve to receive food. Each compartment 43 , 44 , 45 can be closed by means of a separate door 46 or 47 or 48 . The upper compartment 43 can be used, for example, as a refrigerator or as a refrigerator compartment, while the lower compartment 45 can be used as a freezer compartment. The middle compartment 44 is again used to receive the food container 1 . The food container 1 is installed in the compartment 44 as a module. With regard to the temperature of the sub-chamber 44 , it can be provided that the same temperature as in the sub-chamber 43 occurs in this sub-chamber. Alternatively, the temperature inside the subchambers 44 can also be controlled separately or individually.

The compartment 44 can be closed by means of a door 47 , which is preferably a separate door from the door 15 of the food container 1 . Alternatively, however, the door 15 and the drawer 16 can optionally be omitted so that the food container 1 can be closed with the door 47 .

Optionally, it can also be provided that the control device 40 senses the closing process of the door 15 and controls or regulates the nitrogen fraction after sensing the closing process. Additionally or alternatively, the user can also actuate a corresponding actuating device for this purpose, which is arranged, for example, on one of the doors 46 , 47 , 48 .

As can be seen from FIG. 3 , the gas box 28 and/or the nitrogen box 35 can be designed in the form of a flexible bag or bag, which can occupy different volumes. A weight 49 is placed on the boxes 28, 35, the weight of which acts on the flexible bag. In this case, the gas tank 28 and/or the nitrogen tank 35 are arranged on the outside on the housing roof 50 of the outer housing 42 and thus between the housing roof 50 and the weight 49 . The weight 49 may be configured in the form of a heavy plate, which may have a weight ranging from, for example, 10 kg to 50 kg. If the tanks 28, 35 are filled, the weight 49 is raised. If the tanks 28 , 35 are emptied, the weight 49 is lowered again, which is indicated by the arrow diagram 51 . Optionally, a position sensor can be provided, by means of which the current position of the weight 49 is sensed, ie relative to the housing roof 50 . The sensor can sense, for example, the distance between the weight 49 and the housing roof 50 . The sensor can be arranged, for example, in a flexible bag.

Furthermore, FIG. 3 shows a compressor 25 , which in the present exemplary embodiment is placed on the base 52 . In this case, the compressor 25 is arranged in a recess 53 which is formed in the lower rear corner region of the housing 42 . The remaining components of the nitrogen generating device 23 are not shown in FIG. 3 .

Various exemplary embodiments of a refrigeration appliance 2 are now shown in FIGS. 4 to 6 .

FIG. 4 shows a nitrogen tank 35 which is designed as a flexible bag on which a weight 49 is placed. These components are placed on the housing roof 50 . Here, the gas box 28 can be constructed in the form of a rigid or inherently rigid box with a fixed volume. The gas box can be arranged, for example, on the rear side of the housing 42 .

In the exemplary embodiment according to FIG. 5 , the gas box 28 is again designed as a flexible bag which is located below the weight 49 . In this embodiment, an optionally available nitrogen tank 35 is provided, for example in the form of a rigid or fixed volume tank.

Another embodiment is shown in FIG. 6 . The gas box 28 is omitted here, so that the nitrogen generating device 23 has only a single box, the nitrogen box 35 , which is made of a flexible material. Here, the separating unit 34 is directly coupled in a flow-through manner to the nitrogen tank 35 , wherein the gas flow from the nitrogen tank 35 into the food container 1 is controlled by means of a valve 39 . Here, too, the valve 32 does not have to be used.

List of Reference Marks

1 food container

2 refrigeration appliances

3 shells

4 walls

5 walls

6 walls

7 walls

8 covers

9 interior

10 positive side

11 flange

12 openings

13 end side

14 Sealing device

15 doors

16 drawer boxes

17 guide device

18 stop device

19 handles

20 entrance

21 valve

22 container equipment

23 Nitrogen generating device

24 gas mixture

25 compressors

26 ambient air

27 gas mixture

28 gas boxes

29 Entrance

30 exits

31 exit

32 valve

33 Entrance

34 separation unit

35 nitrogen tank

36 Entrance

37 exit

38 exit

39 valve

40 Controls

41 Sensors

42 Outer shell

42a Inner container

43 rooms

44 rooms

45 rooms

46 doors

47 doors

48 doors

49 weight blocks

50 Shell top

51 Arrow icon

52 bottom

53 Concave

Claims (15)

1. Container device (22) for a domestic refrigeration appliance (2), having a food container (1) for receiving food, which can be hermetically closed with a door (15), and having A nitrogen generating device (23), which is used to provide a nitrogen-enriched gas mixture (24) in the inner chamber (9) of the food container (1), wherein the nitrogen generating device (23) has A compressor (25) for compressing the gas mixture (26) and a separation unit (34) configured to separate the nitrogen-enriched gas mixture (24) from the compressed gas mixture (27) , characterized in that the nitrogen generating device (23) has a through-flow coupling with the outlet (30) of the compressor (25) and the inlet (33) of the separation unit (34), for A gas tank (28) storing said compressed gas mixture (27). 2 . The container installation ( 22 ) according to claim 1 , characterized in that the container installation ( 22 ) has a control device ( 40 ) for controlling the compressor ( 25 ), which is designed for, - performing a complete filling process of the gas tank ( 28 ) with the compressed gas mixture ( 27 ) each time at predetermined time intervals, and/or - always when the pressure inside the gas box (28) and/or the amount of the compressed gas mixture (27) inside the gas box (28) is below a predetermined limit value Complete filling process of filling the gas tank ( 28 ) with the compressed gas mixture ( 27 ). 3. The container arrangement (22) according to claim 1 or 2, characterized in that ambient air can be supplied to the compressor (25) as the gas mixture (26) to be compressed. 4. Container arrangement (22) according to one of the preceding claims, characterized in that the nitrogen generating device (23) has a valve (32) for controlling the flow of the compressed gas mixture (27) from the discharge of the gas box (28) onto the separation unit (34). 5. Container arrangement (22) according to one of the preceding claims, characterized in that the nitrogen-enriched gas mixture (24) can be fed directly into the food container (1 ) from the separation unit (34). 6. The container device (22) according to one of claims 1 to 4, characterized in that the nitrogen generating device (23) has an outlet (37) with the separation unit (34) and with the food container ( The inlet ( 20 ) of 1) is coupled in a flow-through manner to a nitrogen tank ( 35 ) for storing the nitrogen-enriched gas mixture ( 24 ). 7. The container arrangement (22) according to one of claims 4 and 6, characterized in that the container arrangement (22) has a control device (40) for controlling the valve (32), which is designed for At, - a complete filling process of filling said nitrogen tank (35) with said nitrogen-enriched gas mixture (24) at predetermined time intervals each time, and/or - always when the pressure inside the nitrogen tank (35) and/or the amount of the nitrogen-enriched gas mixture (24) inside the nitrogen tank (35) is below a predetermined limit value Complete filling of the nitrogen tank ( 35 ) with the nitrogen-enriched gas mixture ( 24 ). 8. Container arrangement (22) according to one of the preceding claims, characterized in that the gas tank (28) and/or the nitrogen tank (35) are designed to occupy different volumes. 9. The container device (22) according to claim 8, characterized in that, - the nitrogen tank ( 35 ) is at least partly made of a flexible material and the nitrogen generating device ( 23 ) has a weight ( 49 ) assigned to the nitrogen tank ( 35 ) placed on the flexible material above the nitrogen tank (35), and/or - the gas box ( 28 ) is at least partly made of a flexible material and the nitrogen generating device ( 23 ) has a weight ( 49 ) assigned to the gas box ( 28 ), which is placed on the flexible above the gas box (28). 10 . The container arrangement ( 22 ) according to claim 8 or 9 , characterized in that the gas box ( 28 ) and/or the nitrogen box ( 35 ) are configured as elastic balloons. 11 . 11. The container arrangement (22) according to one of the preceding claims, characterized in that the food container (1) is configured as a module for installation in the interior (44) of the domestic refrigeration appliance (2). 12. Container arrangement (22) according to one of the preceding claims, characterized in that the food container (1) has a valve for the inner chamber (9) of the food container (1) and for the food The pressure balance between the container's environment. 13. The container arrangement (22) according to one of the preceding claims, characterized in that the container arrangement (22) has a control device (40), which is designed for, in particular by controlling the valves (32, 39) Controlling the nitrogen fraction in the gas mixture inside the food container (1) to a predetermined target value range. 14. Domestic refrigeration appliance (2) having a container arrangement (22) according to one of the preceding claims. 15. A method for generating a nitrogen-enriched gas mixture (24) in an inner chamber (9) of a food container (1) by means of a nitrogen generating device (23), wherein the food container (1 ) is hermetically closed with a door (15), the gas mixture (26) is compressed by means of the compressor (25) of the nitrogen generator (23) and the separation unit (34) of the nitrogen generator (23) Separating said nitrogen-enriched gas mixture (24) from the compressed gas mixture (27), characterized in that, by means of an outlet (30) with said compressor (25) and with said separation unit (34) The inlet (33) is flow-coupled to the gas tank (28) to store the compressed gas mixture (27).