EP2438370A2

EP2438370A2 - Refrigeration device for storing goods in a cool place

Info

Publication number: EP2438370A2
Application number: EP10722035A
Authority: EP
Inventors: Niels Liengaard; Detlef Cieslik; Xiaotian Zhou
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2009-06-03
Filing date: 2010-05-11
Publication date: 2012-04-11
Also published as: DE102009026668A1; WO2010139535A2; WO2010139535A3; CN102483281A

Abstract

A refrigeration device for storing goods in a cool place has a cooling chamber, the interior space of which is cooled during operation of the refrigeration device by means of cooling air that flows through a cooling channel of the cooling chamber. Said channel is formed by at least one wall section adjoining the interior space of the cooling chamber, which section hermetically closes off the cooling channel from the interior space of the cooling chamber and by means of which the thermal output can be transferred from the interior space of the cooling chamber into the cooling channel.

Description

Refrigeration appliance for cool storage of goods

The invention relates to a refrigerator for cool storage of goods.

A refrigerator has a thermally insulated interior to the outside, which is held by means of a refrigeration cycle at a temperature level, which is generally lower than the ambient temperature of the refrigerator. In the refrigeration cycle, a refrigerant is circulated, which is evaporated in an evaporator, so that the refrigerant changes from the liquid phase to the gaseous phase, wherein the evaporation heat necessary for evaporation is withdrawn from the interior of the refrigerator. The gaseous refrigerant is compressed by a compressor and in one

Capacitor condensed from the gaseous phase into the liquid phase, wherein the resulting heat of condensation is released to the environment of the refrigerator.

The refrigerator is, for example, a refrigerator designed as a combined appliance having a cooling chamber and a freezing chamber. The cooling chamber is temperature-controlled above the freezing point, so that goods stored in the cooling chamber can not freeze, whereas the freezing chamber is temperature-controlled below freezing, so that goods stored in the freezing chamber freeze. In the combined appliance, an evaporator is provided both for the cooling chamber and for the freezing chamber.

Alternatively, only a single evaporator is provided in the combination device, wherein air is cooled by the evaporator, which is distributed in the cooling chamber and the freezing chamber is passed.

The air in the interior of the combination unit is provided with low humidity, so that in the freezing chamber only a small amount of humidity can be deposited as frozen frost on the goods and the evaporator. The disadvantage here, however, that if, for example, stored in the refrigerator food, they dry out quickly due to the low humidity in the interior of the refrigerator compartment.

From DE 10 2005 021 606 A1 a refrigerator with a cooling chamber and a freezing chamber is known. The freezing chamber is located above the cooling chamber, wherein between the freezing chamber and the cooling chamber, a gap is provided, in which an evaporator is housed. In the inflow and outflow of the evaporator connecting channels are provided to the freezing chamber and the cooling chamber, so that with the help of a fan, which is located in the outflow region of the evaporator in the intermediate space, air in the interior of the refrigerator can circulate. This raises from the evaporator through the corresponding channels in the

Freezing chamber and from the freezing chamber through the respective channels to the evaporator, a first air circulation and from the evaporator through the corresponding channels to the cooling chamber and from the cooling chamber through the corresponding channels to the evaporator, a second air circulation. In the region of the evaporator, a heater is provided, which is taken to de-evaporate after expiration of appropriate time intervals in operation, so that the evaporator is operable in no-frost operation. Especially at high humidity of the air in the interior of the refrigerator, the time intervals after which the evaporator must be de-iced, short, so that the evaporator has many defrost cycles.

The object of the invention is to provide a refrigeration appliance, in particular a household refrigeration appliance, for the cool storage of goods, in which both the number of defrost cycles and the drying of the stored refrigerated goods is improved.

The refrigerator according to the invention for cool storage of goods has a cooling chamber, the interior of which is cooled during operation of the refrigerator with cooling air flowing through a cooling passage of the cooling chamber, which prevents a cooling air outlet into the cooling compartment and which has at least one adjacent to the interior of the cooling chamber wall portion , is transferable by the heat output from the interior of the cooling chamber in the cooling channel.

By the solution according to the invention is an entry of cooling air into the cooling compartment, e.g. prevented via air outlet openings.

As a result, the cooling air is hermetically separated from the interior of the cooling chamber, so that in the interior of a higher humidity than in the cooling air can be selected. As a result, the good is surrounded by the high humidity in the cooling chamber, so that the good can dry out only a little. Will the cooling air cooled by an evaporator integrated in a refrigeration cycle, the evaporator is exposed only to the low humidity of the cooling air. As a result, icing of the evaporator is low, so that the evaporator has few defrost cycles.

The cooling chamber preferably has an inner container with an inner container wall surrounding the interior of the refrigerating compartment, in which the cooling channel is integrated. Preferably, the inner container wall has on its inside a recess, which is covered with the wall portion, so that is formed by the recess and the wall portion of the cooling channel. The inner container is preferably made by deep drawing, in which the recess is mitangeformt on the inner container wall. As a result, the inner container with the cooling channel is simple, so that the inner container can be manufactured inexpensively.

In addition, it is preferable that the wall portion is formed by a cover plate which is inserted into the recess on the inside of the inner container. The cover plate is preferably a metal sheet or a metal foil. Thus, by heat conduction

Heat output from the interior of the cooling chamber in the cooling channel transferable, the heat transfer coefficient of the cover plate is advantageously low. In addition, the cover plate may be molded to the inner container wall, so that simply the hermetic seal between the cover plate and the inner container wall can be produced.

Preferably, the cooling channel has a cross-section which has a greater extension parallel to the cover plate than perpendicular to the cover plate. The inner container is preferably formed as a cuboid with a door and a door opposite the rear wall, on which the cooling channel is located. Preferably, the cooling channel extends flat against the rear wall and is divided by at least one web formed on the rear wall. The cooling channel thus covers the rear wall of the inner container in a planar and meandering manner, whereby a good heat transfer from the interior of the inner container into the cooling channel is achieved.

Preferably, the refrigeration device has a cooling channel with a cold runner inlet and a cold runner outlet, as well as an evaporator / fan arrangement arranged in the cold runner between the cold runner inlet and the cold runner outlet, wherein the cooling duct a cooling channel outlet connected to the cooling channel inlet and a cooling channel inlet connected to the cooling channel outlet, so that with the evaporator fan arrangement the cooling air can be forcibly circulated through the cooling channel and the cooling channel. As a result, the evaporator-fan arrangement is fed with the cooling air through the cooling duct, which advantageously has low air humidity, so that the evaporator-fan arrangement does not tend to freeze.

In addition, it is preferred that the refrigeration device has a freezing chamber which is connected between the cold runner inlet and the cold runner outlet, so that the cooling chamber can flow through the freezing chamber. Characterized in that the cooling air through the cooling channel via the wall portion first with the cooling chamber thermodynamically in

Contact enters and then only for cooling the freezing chamber flows into this, the cooling air enters the freezing chamber at a higher temperature, as if the cooling air would be passed after exiting the evaporator-fan assembly in the freezing chamber. This has the advantage that, for example, to maintain the temperature in the freezer compartment, the interior of the freezer compartment is not excessively cooled, whereby the refrigeration appliance has an energy-efficient operation.

The interior of the cooling chamber is separated from the cooling air, whereas the cooling air flows through the freezing chamber. The stored in the cooling chamber Good is thus via the wall portion with the cooling air in indirect contact, whereas good, which is stored in the freezing chamber, is in direct contact with the cooling air. This advantageously allows the interior of the cooling chamber to have a high level of atmospheric humidity, whereas the interior of the freezing chamber has a low level of humidity due to the high degree of dryness of the cooling air. This corresponds to the requirements of the respective good, since the good, which is stored in the cooling chamber, to be protected against dehydration, and the good, which is stored in the freezing chamber, to be protected from frosting.

Furthermore, it is preferred that the freezing chamber has a freezing channel, which is connected with its freezing channel inlet at the cold channel outlet and opens with its freezer channel outlet into the freezing chamber. This can be advantageous to the

Freezer are operated independently of the cooling chamber, which is particularly desirable when the temperature in the freezing chamber is to be lowered rapidly to a low level. Furthermore, the refrigeration device preferably has at least one first in the cooling channel

Control device and in the freezing channel at least a second control device with which the cooling air is controlled so that either the cooling channel with the cooling chamber together with the freezing chamber or the cooling channel with the cooling chamber without the freezing chamber or the freezing chamber without the cooling chamber with the cooling air can flow , In this case, the refrigeration device preferably has a thermostatic control with which the control devices can be controlled as a function of the current internal temperatures of the cooling chamber and / or the freezing chamber. Thus, a variable and flexible operation of the refrigerator is possible, with a corresponding cooling of the cooling chamber and / or the freezing chamber is adjustable on the basis of actually prevailing indoor temperatures. As a result, the refrigeration device can be quickly and energy-efficiently brought to the appropriate desired temperature levels.

When the refrigeration device is set up, the cooling chamber is preferably arranged above the freezing chamber, wherein between the freezing chamber and the cooling chamber of the cooling channel is provided with the evaporator-fan assembly. Further, it is preferred that the evaporator-fan assembly comprises an evaporator, which is designed as a fin evaporator and / or as a no-frost evaporator.

In the following, preferred embodiments of a refrigerator according to the invention are explained with reference to the accompanying schematic drawings. It shows:

1 shows a longitudinal section of a first embodiment of the refrigeration device in a first mode,

2 shows a cross section of the embodiment of the refrigerator of FIG. 1,

3 shows the first embodiment of the refrigeration device in a second mode,

4 shows a cross section of the embodiment of the refrigeration device from FIG. 3, FIG.

Fig. 5 is a longitudinal section of a second embodiment of the refrigerator and 6 shows a cross section of the embodiment of the refrigeration device from FIG. 5.

As can be seen from FIGS. 1 to 4, a refrigerator 1 has a housing 2 in which a cooling chamber 3 with a cooling chamber interior 7 and a freezing chamber 4 with a freezing chamber interior 8 are provided. The refrigeration device 1 further has a housing door 5, with which both the cooling chamber 3 and the freezing chamber 4 can be closed. The housing 2 has a heat insulation 6, which is designed for example as a foamed plastic, with which the cooling chamber interior 7 and the freezing chamber interior 8 is thermally insulated to the outside. Surrounding the cooling chamber interior 7, an inner container 9 is provided in the cooling chamber 3, which is formed by an inner container wall 10. At the housing door 5 opposite side of the cooling chamber 3, a cooling chamber rear wall 11 is located.

The inner container wall 10 is provided on the cooling chamber rear wall 11 with a recess 12 to the outside, which extends flat in the region of the cooling chamber rear wall 11. In the inner container 9, a cover plate 14 is placed on the recess 12, so that in the recess 12, a cavity is formed, which is hermetically sealed from the cover plate 14 of the cooling chamber interior 7. In the recess 12, two webs 13 are formed, which extend between the inner container wall 10 and the cover plate 14, so that in the recess 12, a cooling channel 15 is formed.

Between the cooling chamber 3 and the freezing chamber 4, a cooling channel 18 is formed, in which an evaporator-fan assembly 21 is located. The evaporator-fan assembly 21 has an evaporator 22 and a fan 23, wherein the evaporator 22 in a refrigeration cycle (not shown) is integrated. The fan 23 serves to promote cooling air through the cooling channel 18 to the evaporator 22.

The webs 13 are arranged in the recess 12 substantially parallel to each other and extending vertically, so that is formed between the webs 13 in the first portion of the cooling channel 15, which divides in the upper region of the cooling chamber 3 and back down in the cooling chamber. 3 is guided. This results in the shape of the cooling channel 15 shown in FIGS. 2 and 4, namely that the cooling channel 15 in the middle lower region of the cooling chamber 3 has its cooling channel inlet 16 from which the cooling channel 15 extends upwards. In the area of the upper side of the cooling chamber 3, it divides the cooling channel 15 in each case to the left and to the right. The cooling channel 15 is guided from the top of the cooling chamber 3 along the webs 13 in the lateral outer region of the cooling chamber 3 down. As a result, the cooling channel 15 is formed with two branches, which are each guided on the cooling channel 18 down along the freezing chamber rear wall 27 of the freezing chamber 4. At the mid-height of the freezing chamber 4, the branches of the cooling channel 15 towards the freezing chamber interior 8 each have a cooling channel outlet 17.

Between the branches of the cooling channel 15 at the freezing chamber rear wall 27, a freezing channel 28 is provided, which has a freezing channel outlet 30 in the freezing chamber chamber 8, which can be closed by a freezing channel outlet flap 32. Furthermore, the cooling channel 18 has seen in the flow direction of the evaporator fan assembly 21 located a cold runner inlet 19 and a cold runner outlet 20. The freezing chamber interior 8 opens into the cold runner inlet 19, the cold runner 18 at its Kältekanalaustritt 20 both in a freezing channel inlet 29 of the freezing channel 28th and opens into the cooling channel inlet 16. At the cooling channel inlet 16 is a cooling channel inlet flap 26 and at the freezing channel inlet 29 a freezing channel inlet flap 31 is provided with which the access of the cooling channel 15 and / or the freezing channel 28 is controllable.

In a first mode of operation, the freezer channel inlet flap 31 is closed so that the freezer channel 28 is shut down. As a result, during operation of the evaporator fan assembly 21, a cooling air flow 25 is established such that the cooling air flow 25, starting from the fan 23, enters the cooling channel 15 through the cooling channel inlet 16, with the cooling air flow 25 being directed upwards on the cooling chamber rear wall 11 , In the upper region of the cooling chamber 3, the cooling air flow 25 is divided into a left and a right portion, which is then passed in the cooling channel 25 down on the cooling channel 18 along the freezing chamber rear wall 27 via the cooling channel outlet 17 in the freezing chamber interior 8. After the cooling air flow 25 has flowed through the freezing chamber interior 8, the cooling air flow 25 enters through the cold runner inlet 19 into the cooling channel 18 and passes through the evaporator 22.

In a second mode, the cooling channel inlet flap 26 is closed, so that the cooling channel 15 is shut down. In addition, in the area of the freezing chamber 4 in the Cooling passage 15 is provided a cooling passage exit flap 34, so that the region of the cooling channel 15, which is routed to the freezing chamber rear wall 27, also shut down. From the fan 23, the cooling air flow 25 is conveyed through the cold runner outlet 20 and the freezing passage 29 into the freezing passage 28, whereupon the cooling air flow 25 enters the freezing passage door 32 through the freezing passage door 32 into the freezing chamber interior 8. After the cooling air flow 25 has flowed through the freezer chamber interior 8, the cooling air flow 25 enters the cold runner 18 at the cold runner inlet 19 and then passes through the evaporator 22.

In the first mode, the cooling air is first conveyed into the cooling channel 15, wherein due to heat conduction through the cover plate 14 heat 24 is removed from the cooling chamber interior 7. Characterized in that the cooling air flow 25 enters the cooling channel 15 immediately after passing through the evaporator 22, the cooling air flow 25, in particular in the region of the cooling channel inlet 16 has a low temperature. Thus, the temperature difference between the cooling chamber interior 7 and the cooling air flow 25 in this area is high, so that the cooling chamber interior 7 can be cooled rapidly and effectively.

Caused by the inclusion of the heat output 24 in the cooling channel 15, the cooling air flow 25 at the cooling channel outlet 17 has a higher temperature than the Kältekanal- outlet 20 so that the freezing chamber interior 8 is not burdened with a cooling air flow 25 cooled too much, as it would be the case If the cooling air flow 25 would have been passed directly to the cold channel outlet 20 into the freezing chamber interior 8.

The embodiment of the refrigeration device 1 shown in FIGS. 5 and 6 differs from the embodiment shown in FIGS. 1 to 4 in that the cooling channel outlet 17 is not provided in the freezing chamber 4 but at the cold channel inlet 19. For this purpose, the cooling channel 15 is moved from the cooling chamber rear wall 1 1 to the cold runner inlet 19 on an inner container side wall 33. During operation of the evaporator-fan assembly 21, the cooling air flow 25 is conveyed from the fan 23 through the Kältekanalaustritt 20 in the cooling channel 15 through the Kühlkanaleintritt 16, after which the cooling air flow 25 flows through the cooling channel 15 along the cooling chamber rear wall 11 and finally through the cooling passage 17 and the cold runner inlet 19 to the Evaporator 22 is passed. As a result, only a cooling of the cooling chamber 3 is achieved, whereas the freezing chamber 4 is shut down.

The cooling channel 18 extends horizontally, the cold channel outlet 20 being located in the region of the cooling chamber rear wall 11 and the cold channel inlet 19 being located in the region of the housing door 5. Thus, a flow direction of the cooling air flow 25 through the cooling channel 28 results from the housing door 5 to the cooling chamber rear wall 11. The fan 23 is disposed downstream of the evaporator 22, so that by the fan 23 already cooled by the evaporator 22 cooling air flow 25 is promoted.

REFERENCE NUMBERS

1 cold appliance

2 housings

3 cooling chamber

4 freezing chamber

5 housing door

6 heat insulation

7 cooling chamber interior

8 freezer compartment interior

9 inner container

10 inner container wall

11 cooling chamber rear wall

12 deepening

13 footbridge

14 cover plate

15 cooling channel

16 cooling channel entry

17 Cooling channel outlet

18 cooling channel

19 cold channel entry

20 cooling channel outlet

21 evaporator-fan arrangement

22 evaporator

23 fans

24 heat output

25 cooling air flow

26 cooling channel inlet flap

27 freezer compartment rear wall

28 freezing channel

29 freezing channel entry

30 Freezer outlet Freezer channel inlet flap Freezer outlet flap Inner container side wall Cooling channel outlet flap

Claims

1. Refrigeration appliance, in particular domestic refrigeration appliance, for the cool storage of goods, with at least one cooling chamber (3) whose interior (7) during operation of the

Refrigerating appliance (1) with cooling air (25) is cooled, which flows through a cooling channel (15) of the cooling chamber (3), which prevents a cooling air outlet into the cooling compartment and the at least one of the interior (7) of the cooling chamber (3) adjacent wall portion ( 14), by the heat output (24) from the interior (7) of the cooling chamber (3) in the cooling channel (15) is transferable.

2. Refrigerating appliance according to claim 1, wherein the cooling chamber (3) has an inner container (9) with an interior (7) of the cooling compartment (3) delimiting inner container wall (10), in which the cooling channel (15) is arranged at least partially integrated.

3. Refrigerating appliance according to claim 2, wherein the inner container wall (10) on its inside a recess (12) which is covered with the wall portion (14), so that of the recess (12) and the wall portion (14) of the cooling channel ( 15) is formed.

4. Refrigerating appliance according to claim 2 or 3, wherein the inner container (9) is made by deep drawing, in which the recess (12) in the inner container wall (10) is mitgeformt.

5. Refrigerating appliance according to one of claims 1 to 4, wherein the wall portion of a cover plate (14) is formed, which on the inside of the inner container (9) and the recess (12) covers, in particular in the recess (12) is inserted ,

6. Refrigerating appliance according to claim 5, wherein the cover plate (14) is formed of good heat-conducting material, in particular of sheet metal or of a metal foil.

7. Refrigerating appliance according to one of claims 2 to 6, wherein the cooling channel (15) has a

Cross-section has, parallel to the cover plate (14) has a greater Aussteckung than perpendicular to the cover plate (14).

8. Refrigerating appliance according to one of claims 1 to 7, wherein the inner container (9) as a cuboid with a door (5) and one of the door (5) opposite the rear wall (11) is formed on which the cooling channel (15) is.

9. Refrigerating appliance according to claim 8, wherein the cooling channel (15) extends flat against the rear wall (11) and is divided by at least one web (13) formed on the rear wall (11).

10. Refrigerating appliance according to one of claims 1 to 9, wherein the refrigeration device (1) has a cooling channel (18) with a cold runner inlet (19) and a cold runner outlet (20) and one in the cold runner (18) between the cold runner inlet (19) and the Refrigeration channel outlet (20) arranged evaporator-fan assembly (21), wherein the cooling channel (15) at the Kältekanaleintritt (19) connected Kühlkanalaustritt (17) and at the Kältekanalaustritt (20) connected to Kühlkanaleintritt (16), so that with the evaporator-fan assembly (21), the cooling air (25) through the cooling channel (18) and the cooling channel (15) is forcibly recirculated.

11. Refrigerating appliance according to claim 10, wherein the refrigeration device (1) has a freezing chamber (4) which is connected between the cold runner inlet (19) and the cooling channel outlet (17), so that the freezing chamber (4) can be flowed through by the cooling air (25) is.

12. Refrigerating appliance according to claim 1 1, wherein the freezing chamber (4) has a freezing channel (28) which is connected to its freezing channel inlet (29) to the cold runner outlet (20) and opens with its freezer outlet (30) in the freezing chamber (4) ,

13. Refrigerating appliance according to claim 12, wherein the refrigeration device (1) in the cooling channel (15) at least a first control device (26) and in the freezing channel (28) at least a second control device (31, 34), with which the Cooling air (25) is controllable such that either the cooling channel (15) with the

Cooling chamber (3) together with the freezing chamber (4) or the cooling channel (15) with the cooling chamber (3) without the freezing chamber (4) or the freezing chamber (4) without the cooling chamber (3) with the cooling air (25) can be flowed through.

14. Refrigerating appliance according to claim 13, wherein the refrigeration device (1) is a thermostatic

Having control with which, depending on the current internal temperatures of the cooling chamber (3) and / or the freezing chamber (4), the control means (26, 31, 34) are controllable.

15. Refrigerating appliance according to one of claims 1 1 to 14, wherein, when the refrigeration device (1) is placed, the cooling chamber (3) above the freezing chamber (4) is arranged, wherein between the freezing chamber (4) and the cooling chamber (3) the cooling channel (28) with the evaporator-fan assembly (21) is provided.

16. Refrigerating appliance according to one of claims 10 to 15, wherein the evaporator fan assembly (21) has an evaporator (22) which is designed as a fin evaporator and / or as a no-frost evaporator.