WO2009127535A1 - Refrigerator with a bent evaporator surface - Google Patents

Abstract

The invention relates to a refrigerator (1) comprising an external housing (2), at least one container (3) for products to be refrigerated having at least one refrigeration compartment (4) for accommodating products (5) to be refrigerated, and a cooling circuit (6) for cooling the refrigeration compartment (4), wherein the cooling circuit (6) has an evaporator (7) with a substantially two-dimensional evaporator surface (17) and the evaporator is arranged on an inner wall (10) of the container (3) for products to be refrigerated, wherein a sub-area (8) of the evaporator surface (17) is bent towards the inner wall (10) and the evaporator (7) with the bent sub-area (8) is connected to the container (3) for products to be refrigerated, and said refrigerator is distinguished by a high degree of efficiency, the ability to be cleaned easily and simple mounting. The invention also relates to a plate-like evaporator (7) which is particularly easy to clean and simple to mount and has a high degree of efficiency, and also to a method for mounting a refrigerator (1).

Description

 REFRIGERATOR WITH A BROKEN EVAPORATOR SURFACE

The invention relates to a refrigeration appliance, in particular domestic refrigeration appliance, comprising an outer casing, at least one refrigerated goods container having at least one refrigerated compartment for receiving refrigerated goods and a cooling circuit for cooling the refrigerated compartment, the refrigeration circuit having an evaporator with a substantially two-dimensional

Evaporator surface and the evaporator is disposed on an inner wall of the refrigerated goods. Furthermore, the invention relates to a plate-shaped evaporator and a method for mounting a refrigeration device.

A refrigerator is an electrical or gas powered device that provides a refrigerated interior for storing refrigerated goods. The temperatures in the interior are usually above 0 ° C, for example between +2 ° C and +12 ° C. A freezer is a corresponding device for storing frozen food and has an interior with temperatures below 0 ° C, for example between -25 ° C and -4 ° C, on. Refrigerator and freezer combinations have at least two internal spaces or two separate areas for the different temperature ranges.

Such refrigerators have a cooling circuit for cooling the respective interior. The cooling circuit absorbs the heat in the interior via a thermally coupled heat exchanger and outputs this by means of a second heat exchanger to the environment. A refrigeration cycle may include a variety of components, such as a condenser, an evaporator, valves, flow resistors, and refrigerant lines.

As a heat exchanger for delivering cold in the interior of the refrigerator, an evaporator is often used, which is arranged substantially two-dimensionally or plate-shaped in the interior. Such refrigerators are also called "CoId Wall" devices. For this purpose, the evaporator is connected to the cooling circuit, wherein the

Connection points of the evaporator and sometimes the whole evaporator are covered by an additional component. The function of the additional component is to cover the areas or areas that could be contaminated. As a result, the cleanability of the interior of the refrigerator is facilitated. It is therefore an object of the present invention, a refrigeration device, in particular

Household refrigeration appliance to provide, which has a high efficiency, is easy to clean and can be easily and inexpensively manufactured.

It is a further object of the present invention to provide a plate-shaped evaporator for use in a refrigerator, which works very efficiently, is easy to assemble and facilitates the cleanability of the refrigerator.

Moreover, it is an object of the present invention to provide a method for mounting a refrigeration device, which is particularly simple and inexpensive to carry out.

These objects are achieved by the refrigeration device, in particular household refrigeration appliance, the plate-shaped evaporator and the method for mounting a refrigerator as specified in the independent claims.

Further advantageous embodiments and developments, which can be used individually or combined with each other in a suitable manner, are the subject of the dependent claims and are explained in more detail in the following description.

The refrigerator according to the invention comprises an outer housing, at least one refrigerated goods container with at least one refrigerated compartment for receiving refrigerated goods and a cooling circuit for cooling the refrigerating compartment, the cooling circuit having an evaporator with a substantially two-dimensional evaporator surface and the evaporator is arranged on an inner wall of the refrigerated goods, wherein a partial surface of the evaporator surface is bent toward the inner wall and the evaporator is connected to the bent part surface with the refrigerated goods.

In one embodiment, the bent-over partial surface is downstream of the evaporator surface in the installed state of the evaporator. In particular, the bent partial surface extends at least approximately parallel to the evaporator surface.

Furthermore, the bent-over partial surface can be arranged at the top in the installed state of the evaporator. Conveniently, the bent partial surface and the evaporator surface may have a distance of at least 5 mm, in particular a distance of 10 mm to 50 mm.

In a further embodiment, a fold connecting the partial surface and the evaporator surface is U-shaped in cross-section.

The evaporator may be attached to an inner wall of the refrigerated goods container or of the inner container as well as to the housing of the refrigeration device. The partial area of the evaporator surface is a functional surface of the evaporator through which the coolant flows. The refrigeration device may be a so-called CoId Wall device. By bending a partial surface of the evaporator, the connection points of the evaporator can be covered by the evaporator itself. This eliminates further measures to cover the connection points and the cleanability of the evaporator is improved.

Furthermore, the evaporator can be hung or fastened with the aid of the bent partial surface on the inner wall of the refrigerated goods container or the housing of the refrigerating appliance. This simplifies assembly and reduces costs in the manufacture of the refrigeration device.

By the bent evaporator surface, the cooling air flow inside the refrigerated goods can be positively influenced and thus the efficiency of the evaporator can be improved.

Consequently, the bent part surface on the one hand have a supporting function, on the other hand have a covering function.

Due to the bent partial surface, the evaporator covers its own evaporator connections, so that additional components for covering the connections are eliminated and thus the installation of the refrigeration device is simplified. The bent surface also allows easy mounting of the assembly in the interior of the refrigerator and also simplifies assembly in this regard.

Furthermore, the bent-over surface makes it possible to positively influence the flow of cooling air downstream of the evaporator between the inner wall and the evaporator. The evaporator can be configured as a circuit board provided with coolant lines, which is bent backwards.

Advantageously, the bent partial surface has first holding means for fastening the evaporator to the inner wall or to the refrigerated goods container. With the aid of the first holding means, the evaporator can be attached in a simple manner to the refrigerated goods container or to an inner wall of the refrigerating appliance, such as e.g. be hung up. For example, the evaporator can first be connected to the cooling circuit and then bent over and then fixed. As a result, the assembly of the refrigeration device is considerably simplified.

In one embodiment, the first holding means are formed as receiving holes, in particular keyholes. As a result, the evaporator can be fixed by a few handles on the inner wall or the refrigerated goods container of the refrigerator.

In one embodiment, the first holding means have a receiving region and a fastening region which is connected thereto and narrows with respect to the receiving region, and are designed in particular as keyholes. In particular, the holding means are arranged at least approximately equal in height and at a horizontal distance from each other.

In a further refinement, the evaporator has second holding means for fastening the evaporator to the inner wall or to the refrigerated goods container. With the help of the second holding means, the evaporator can be securely locked to the inner wall or the refrigerated goods container. The second holding means may be formed as tabs, which are preferably bent to extend parallel to the evaporator surface. They can be bent from the evaporator surface to the inner wall and have there purely supporting function. The second holding means are purely mechanical fixation and are not flowed through by coolant, ie they have no coolant lines. The second holding means are advantageously provided at a lower end of the evaporator located in the installation position. For example, the second holding means may serve to secure the evaporator held by the first holding means against displacement, so that the evaporator does not slip out of the receiving holes, which may be formed as keyholes. In a further embodiment, the evaporator has a latching means for locking attachment to the inner wall or to the refrigerated goods, in particular expansion rivets, on. The latching means may for example also be designed as a clip with which the evaporator is fixed to the inner wall or to the refrigerated goods container.

Advantageously, the bent-over partial surface has connection connections for the cooling circuit, in particular the injection point. As a result, the evaporator itself covers its own connection connections in the installed state, so that additional components for covering the connection connections are unnecessary.

In a special embodiment, the bent partial surface is bent by at least 150 degrees, for example 180 degrees.

The bent partial surface may occupy at least 5%, in particular at least 10%, for example 20%, of the total area of the evaporator. The plate-shaped evaporator according to the invention for a refrigeration device, in particular for the refrigerator according to the invention, with a substantially two-dimensional evaporator surface is characterized in that the evaporator surface is bent or bendable and the bent or bendable part surface has receptacles for fixing the evaporator to the refrigerator. In one embodiment, the bent or bendable partial surface has connection connections for coolant lines.

The inventive method for mounting a refrigerator with at least one refrigerated compartment lining a refrigerated goods container, a cooling circuit and an evaporator for arrangement in the refrigerating compartment, wherein the evaporator has a substantially two-dimensionally formed evaporator surface which is bendable or bent on a partial surface comprises the following method steps: Connecting the evaporator with the cooling circuit, placing the evaporator with its bent part to the cooling compartment near the compartment section of the refrigerator compartment, striking the evaporator surface with the part surface connecting Umbugs to the cooling fan cover, hooking the evaporator to the refrigerated goods container on a bendable or bent part surface, and locking the part on refrigerated goods,

In a special embodiment, the evaporator is attached to the refrigerated goods container at a bendable or bent edge of the evaporator surface. The Verrasten the evaporator surface on refrigerated goods can with the help of one of bendable or bent edge opposite edge of the evaporator surface done.

The evaporator may be configured as previously described. With the method, in particular, the refrigeration device described above can be mounted.

With the help of the method, the installation of the refrigeration device is considerably simplified. In particular, this eliminates the need to assemble additional parts to cover the connections between the evaporator and the rest of the cooling circuit.

The bending of the evaporator can be done before or after the connection of the evaporator with the cooling circuit. The evaporator may be bent at an upper edge and hung there on refrigerated goods, but it may also be bent to a lower end and there secured to the refrigerated goods. Of the

Evaporator is locked in particular on its edge opposite the bent edge with the refrigerated goods.

Further advantageous aspects and details, which in each case can be applied individually or combined with one another in a suitable manner, are explained in more detail with reference to the following drawing, which is intended to illustrate the invention by way of example.

They show schematically:

Fig. 1 shows an embodiment of a refrigerator according to the invention in

Cross section from the side;

2 shows a plate-shaped evaporator according to the invention of an embodiment of a refrigeration device before bending over a partial surface of the evaporator from behind.

FIG. 3 shows the plate-shaped evaporator according to FIG. 2 from the front; FIG.

Fig. 4 is a detail view of a terminal of the plate-shaped evaporator of Fig. 3; 5 shows a further detailed view of the plate-shaped evaporator according to FIG.

3;

Fig. 6 is a sectional view taken along the line J-J of the plate-shaped

Evaporator of Fig. 3; Fig. 7 is a further sectional view taken along the line CC of the plate-shaped

Evaporator according to Fig. 3:

8 shows a further embodiment of a plate-shaped evaporator according to the invention with a bent partial surface in the plan view from the front; 9 shows the plate-shaped evaporator with bent part surface according to FIG.

8 from the back;

10 shows the plate-shaped evaporator with bent part surface according to FIG.

8 from the side; and

1 1 is a perspective view of the plate-shaped evaporator of FIG .. 8

1 shows a cross section through an embodiment of a refrigeration device 1 with a refrigerated goods container 3, which provides a refrigerated compartment 4 for receiving refrigerated goods 5. The refrigeration device has a heat-insulating outer housing 2 which is foamed with the refrigerated goods container 3. About a door 24, the refrigerator compartment 4 is accessible. The refrigerator is designed as a household refrigerator.

The refrigerator comprises a refrigeration circuit 6 which comprises a compressor 26 for compressing a refrigerant circulating in the refrigeration circuit 6, a condenser 25 for liquefying the refrigerant under pressure when heat is given to the environment, and an evaporator 7 for evaporating refrigerant and generating Refrigeration for cooling the refrigerating compartment 4.

The evaporator 7 is arranged as a CoId Wall evaporator in the cooling compartment 4 and secured by means of first holding means 9 and second holding means 12 to the refrigerated goods 3. The evaporator 7 is substantially two-dimensional and plate-shaped.

The evaporator 7 is bent at a bending point 22. A partial surface 8 of the evaporator 7 is bent to form an inner wall 10 of the refrigerated goods container 3 and covers an evaporator inlet 20 and an evaporator outlet 21 of the evaporator 7. The evaporator 7 is attached to the bent part surface 8 by means of the first holding means 9 on the inner wall 10 and at one of the bent portion 8 opposite end fixed by means of the second holding means 12 on the inner wall 10. By the bent portion 8, the evaporator inlet 20 and the Evaporator outlet 22 hidden, whereby the cleanability of the refrigerated goods container 3 is improved. This eliminates an additional component with which such connections are normally covered.

Fig. 2 shows an evaporator 7 of a refrigeration device 1, for example of the FIG. 1, in the plan view from the rear, i. seen from the inner wall 10 of the refrigerated goods 3 from. The evaporator 7 is substantially two-dimensional, i. plate-shaped and has connection terminals 15 for connection to the cooling circuit 6. The evaporator has a multiplicity of coolant lines 23 and can be bent over in a region provided by the coolant lines 23 which forms a bendable partial surface 8 of the evaporator 7. For this purpose, a plurality of bending edges 29 is provided, with which the evaporator 7 including the coolant lines 9 can be bent. The bending edges allow bending of the bendable part surface by 180 degrees. The evaporator 7 has an essentially two-dimensional evaporator surface 17, and the deflectable partial surface 8 corresponds to approximately 20% of the total area 16 of the evaporator 7. The deflectable partial surface 8 has first holding means 9 for fastening the evaporator 7 to the refrigerated goods container 3. The first

Holding means 9 are designed as keyholes, so that the evaporator 7 can be hung on provided on the refrigerated goods container 3 bolts and thus locked. At a lower end of the evaporator 7, the second holding means 12 are provided, with which the evaporator 7 can be locked, so that it can not be inadvertently detached from the bolt (not shown) of the refrigerated goods 3. The first

Holding means 9 are provided on a bendable edge 18 of the evaporator surface 17. The second holding means 12 are provided at one of the bendable edge opposite edge 19.

Fig. 3 shows the plate-shaped evaporator 7 of FIG. 2 from the front. Further locking means 14 are used for secure attachment of the evaporator 7 on refrigerated goods. 3

FIG. 4 and FIG. 5 show sections A and B of the plate-shaped evaporator 7 according to FIG. 3. The coolant lines 23 are connected by a heat conducting plate 28 in order to increase the area effective for the cooling discharge and thus the cold transfer from the refrigerant to the cooling compartment 4 to improve. Fig. 5 shows the first holding means 9, which are formed as a key-like receiving holes 11. Figures 6 and 7 show detail views of the sections taken along lines JJ (Figure 6) and C-C (Figure 7). FIG. 6 shows further latching means for fastening the evaporator 7 to the refrigerated goods container 3. Likewise, FIG. 7 shows a further sectional view of this latching means 14.

FIG. 8 shows a further embodiment of the two-dimensional or plate-shaped evaporator 7 for a refrigeration device 1, for example of the one according to FIG. 1. In this case, the partial surface 8 is bent along the bending point 22. The evaporator 7 is equipped with a large-area heat conduction plate 28 for increasing the area effective for the cooling discharge and for simplifying the cleanability of the evaporator. At the lower end 13 of the evaporator 7, the second holding means 12 are provided for fixing and locking the evaporator 7 to the refrigerated goods 3. Fig. 9 shows the plate-shaped evaporator 7 of Fig. 8 in the plan view from the rear, i. viewed from the view of the inner wall 7 of the refrigerated goods 3. It can be seen the bent part surface 8 and the bent edge 18 of the evaporator surface 17. On the bent edge 18, the first holding means 9, which are configured as a keyhole-shaped receiving holes 11 are provided. The bent partial surface 8 is bent along the bending point 22 by approximately 180 degrees to the inner wall 10 of the refrigerated goods container 3. At the bent edge 18 opposite edge 19, the second holding means 12 are provided for locking the evaporator 7 to the refrigerated goods 3.

Fig. 10 shows the plate-shaped evaporator 7 of FIG. 8 from the side. Evident are the bent portion 8, the bent edge 18, the bending point 22 and the bent edge 18 opposite edge 19. The bent part surface 8 occupies about 20% of the total area 16 of the evaporator 7 a.

11 shows the plate-shaped evaporator 7 according to FIG. 10 in a perspective view.

The invention relates to a refrigeration device 1 comprising an outer casing 2, at least one refrigerated goods container 3 with at least one refrigerated compartment 4 for receiving refrigerated goods 5 and a cooling circuit 6 for cooling the refrigerating compartment 4, the cooling circuit 6 having an evaporator 7 with a substantially two-dimensional evaporator surface 17 and the evaporator is arranged on an inner wall 10 of the refrigerated goods container 3, wherein a partial surface 8 of the evaporator surface 17 is bent towards the inner wall 10 and the evaporator 7 is connected to the bent partial surface 8 with the refrigerated goods container 3, and is characterized by a high efficiency, good cleanability and simple Assembly off. The invention further relates to a particularly easy to clean and easy to install plate-shaped evaporator 7, which has a high efficiency, and a method for mounting a refrigeration device. 1

LIST OF REFERENCE NUMBERS

1 refrigeration device

2 outer housing

3 Refrigerated goods container 4 Cooling compartment

5 refrigerated goods

6 cooling circuit

7 evaporator

8 umbiegbare or bent partial surface of the plate-shaped evaporator 7 9 first holding means

10 inner wall

11 pick-up holes

12 second holding means

13 lower end of the evaporator 7 14 locking means

15 connection connections

16 total area of the evaporator 7

17 two-dimensional evaporator surface

18 umbiegbare or bent edge of the evaporator surface 17 19 opposite edge

20 evaporator inlet

21 evaporator outlet

22 bending point

23 coolant lines 24 door Condenser compressor heat conducting sheet bending edge

Claims

1. Refrigeration appliance (1), in particular domestic refrigeration appliance, comprising an outer housing (2), at least one refrigerated goods container (3) with at least one cooling compartment (4) for Receiving refrigerated goods (5) and a cooling circuit (6) for cooling the refrigerating compartment (4), wherein the cooling circuit (6) comprises an evaporator (7) with a substantially two-dimensional evaporator surface (17) and the evaporator (7) on an inner wall (10) of the refrigerated goods container (3) is arranged, characterized in that a partial surface (8) of the evaporator surface (17) to the inner wall (10) is bent back and the evaporator (7) with the bent part surface (8) with the refrigerated goods container ( 3) is connected. 2. Refrigerating appliance (1) according to claim 1, wherein the bent partial surface (8) in the installed state of the evaporator (7) downstream of the evaporator surface (17). 3. Refrigerating appliance (1) according to claim 1 or 2, wherein the bent partial surface (8) extends at least approximately parallel to the evaporator surface (17). 4. Refrigerating appliance (1) according to one of the preceding claims, wherein the bent partial surface (8) in the installed state of the evaporator (7) is arranged above. 5. Refrigerating appliance (1) according to one of the preceding claims, wherein the bent Partial surface (8) and the evaporator surface (17) have a distance of at least 5 mm, in particular a distance of 10 mm to 50 mm. 6. Refrigerating appliance (1) according to one of the preceding claims, wherein a part surface (8) and the evaporator surface (17) connecting Umbug in cross-section U-shaped. 7. Refrigerating appliance (1) according to one of the preceding claims, wherein the bent partial surface (8) has first holding means (9) for fixing the evaporator (7) on the inner wall (10). 8. Refrigerating appliance (1) according to claim 7, wherein the first holding means (9) has a receiving area (11) and an associated and with respect to the Receiving area narrowing attachment area, in particular as keyholes are formed. 9. Refrigerating appliance (1) according to claim 8, wherein the holding means are arranged at least approximately at the same height and at a horizontal distance from each other. 10. Refrigerating appliance (1) according to one of the preceding claims, wherein the evaporator (7) second holding means (12) for fixing the evaporator (7) on the inner wall (10). 11. Refrigerating appliance (1) according to claim 10, wherein the second holding means (12) are designed as tabs, which are preferably bent parallel to the evaporator surface (17) extending. 12. Refrigerating appliance (1) according to claim 10 or 11, wherein the second holding means (12) at the lower end (13) of the evaporator located in the installation position (7) are provided. 13. Refrigerating appliance (1) according to one of the preceding claims, wherein the evaporator (7) latching means (14) for latching attachment to the inner wall (10) or on the refrigerated goods container (3), in particular expansion rivets, having. 14. Refrigerating appliance (1) according to one of the preceding claims, wherein the bent partial surface (8) connection connections (15) for the cooling circuit (6), in particular the injection point has. 15. Refrigerating appliance (1) according to one of the preceding claims, wherein the bent partial surface (8) at least 5%, in particular at least 10%, for example 20%, of the total area (16) of the evaporator (7) occupies. 16. plate-shaped evaporator (7) for a refrigeration device (1), in particular for a refrigeration device (1) according to one of the preceding claims 1 to 10, with an im Essentially two-dimensional evaporator surface (17), characterized in that the evaporator surface (17) is bent or bendable and the bent or bendable part surface (8) has receptacles for fixing the evaporator (7) to the refrigeration device (1). 17. Plate-shaped evaporator according to claim 16, wherein the bent or bendable part surface (8) connection connections for coolant lines (23). 18. A method for mounting a refrigeration device (1) with at least one refrigerated compartment (4) refrigerated goods container (3), a cooling circuit (6) and an evaporator (7) for arrangement in the cooling compartment (4), wherein the evaporator (7) a substantially two-dimensional trained Evaporator surface (17) which can be bent or bent on a partial surface, comprising the following method steps Connecting the evaporator (7) to the cooling circuit (6), Placing the evaporator (7) with its bent part surface for Refrigerator compartment near section of the refrigerator compartment rear wall, - Stopping the evaporator surface (17) with the part surface connecting Umbugs to the cooling fan cover, - hanging the evaporator (7) on the refrigerated goods container (3) on a bendable or bent part surface, and - Locking of the partial surface on the refrigerated goods container (3).