EP2694889A1

EP2694889A1 - Domestic refrigerator having a refrigerant circuit system

Info

Publication number: EP2694889A1
Application number: EP12713053.2A
Authority: EP
Inventors: Detlef Cieslik; Hans Ihle; Wolfgang Nuiding; Berthold Pflomm; Bernd Schlögel
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2011-04-07
Filing date: 2012-03-28
Publication date: 2014-02-12
Anticipated expiration: 2032-03-28
Also published as: PL2694889T3; WO2012136530A1; DE102011006952A1; EP2694889B1; CN103459945B; CN103459945A

Abstract

The invention relates to a domestic refrigerator (1) having an internal container (2) which has container walls (2a, 2b, 2c, 2d, 2e) which bound at least one coolable storage space (3, 14) for products to be refrigerated and which have rear surfaces, and having a refrigerant circuit system (4) with at least two evaporator plates (5a, 5b, 5c, 5d, 5e), the front faces of said evaporator plates resting against rear surfaces, which have different orientations, of the container walls (2a, 2b, 2c, 2d, 2e) and the rear faces of said evaporator plates being populated by at least one evaporator tube (10), in the case of which the at least one evaporator tube (10) has a first evaporator tube section (10c) in the direction of flow of a refrigerant which flows through the evaporator tube (10) and is laid along an evaporator plate (5c) which rests against that container wall (2c) which is associated with the top of the storage space (3), and has a second evaporator tube section (10a) which is connected downstream of the first evaporator tube section (10c) in the direction of flow and which is laid along an evaporator plate (5a) which rests against that container wall (2a) which is associated with the base of the storage space (3), and has a third evaporator tube section (10e) which is connected downstream of the second evaporator tube section (10a) in the direction of flow and has a directional component which is oriented against the force of gravity.

Description

Domestic refrigerating appliance with a refrigerant cycle system

The invention relates to a domestic refrigerator, comprising an inner container having at least one coolable storage space for refrigerated goods bounding container walls with rear surfaces, and a refrigerant cycle system with at least two evaporator plates, the front sides of differently oriented back

Surface of the container walls abut and the backs are covered with at least one evaporator tube.

From DE 32 04 556 A1 discloses a thermally insulated housing, in particular for household refrigeration furniture is known, with a plastic inner container, on the heat insulation facing the outside of a plate-shaped evaporator with good heat transfer in close contact, wherein at one, at least the upper portion of Back wall covering the central evaporator section to connect lateral evaporator sections which extend in the upper region of the side walls of the inner container outboard to the vicinity of the opening of the housing. The evaporator is formed of a coil whose walls are fixed on a heat-conducting support plate by clamping, Anschellen, soldering or the like. To the

Transitions of a central evaporator section to lateral sections, the support plate is interrupted by vertical slots, which are bridged only by the tubes of the coil. In this way, the individual can be

Turn the evaporator sections particularly lightly and place them close to the outside of the inner tank.

The object of the invention is a household refrigerator with an improved

Mountability, manufacturing quality and / or improved energy efficiency of

Evaporator plates on the back surfaces of container walls to create a coolable by means of a refrigerant circuit system storage space for refrigerated goods.

The object of the invention is achieved by a household refrigerator, comprising an inner container, the at least one coolable storage space for refrigerated goods limiting

Container walls having rear surfaces, and a refrigerant cycle system with at least two evaporator plates whose front sides at different oriented back surfaces of the container walls and the backs are covered with at least one evaporator tube, wherein the at least one

Evaporator tube in the flow direction of a refrigerant flowing through the evaporator tube has a first evaporator tube section, which is laid along an adjacent to that container wall evaporator plate, which is associated with the ceiling of the storage room and a first evaporator tube section in

Having flow direction downstream second evaporator tube section, which is laid along an adjacent to that container wall evaporator plate, which is associated with the bottom of the storage room and one the second

Evaporator pipe section downstream in the flow direction third

Evaporator pipe section having a counter to the gravity directional component.

The third evaporator tube section can be laid along an evaporator plate which adjoins the container wall and which is assigned to a rear wall of the storage space.

In an alternative embodiment, the third evaporator tube section can be laid along an evaporator plate which adjoins the container wall and which is assigned to a side wall of the storage space.

In all embodiments of the invention, the evaporator tube may have a fourth evaporator tube section, which is arranged in the flow direction between the first evaporator tube section and second evaporator tube section and which is laid along an adjacent to that container wall evaporator plate, which is associated with a side wall of the storage room.

In all embodiments according to the invention, alternatively, the evaporator tube may have a fourth evaporator tube section, which is arranged in the flow direction between the first evaporator tube section and the second evaporator tube section and which is laid along an evaporator plate adjoining the container wall, which is assigned to a rear wall of the storage space. In the following, an exemplary embodiment of a course of

Evaporator pipe sections of an evaporator tube described, which extends over five evaporator plates.

First and foremost, the evaporator tube runs in the flow direction along an evaporator plate resting against that container wall, which forms the ceiling of the storage space. In this case, preferably, the door leaf facing portion of the first

Evaporator plate and then a rear portion of the voltage applied to the ceiling wall of the storage room evaporator plate. After that, it runs

Evaporator tube in the flow direction along an adjacent to that container wall evaporator plate, which forms a first side wall of the storage space. Subsequently, the evaporator tube runs in the flow direction along an adjacent to that container wall evaporator plate, which forms a bottom wall of the storage room. Thereafter, the evaporator tube extends in the flow direction along an adjacent to that container wall evaporator plate, which forms a rear wall of the storage room. Along this rear wall, an evaporator tube section is arranged, which has a counter to the gravity directional component. Finally, the evaporator tube extends in the flow direction along an adjacent to that container wall evaporator plate, which forms a second remaining side wall of the storage room. In addition, after leaving the evaporator plates, which surround a freezer compartment, the evaporator tube in

Flow direction are led to another separate evaporator plate of a cold room. Finally, this can end the evaporator tube in the compressor.

On each evaporator plate, in particular on the evaporator plates, which the

Ceiling wall and / or occupy the bottom wall, the evaporator tube can be arranged running meandering.

The described course of the evaporator tube can be adapted for devices with lower demand on the device energy consumption, for example by only the

Bottom wall, the ceiling wall and / or the rear wall with evaporator plates and

Be provided evaporator tube. Even in such an embodiment, the output of the evaporator, for example in the direction of the refrigerator compartment in refrigerated-freezer combination devices can be designed so that there is a pipe run on the rear wall, the one Overflow of refrigerant in the downtime of the compressor at least reduced or even prevented. An embodiment of an evaporator tube with

Overflow prevention has, for example, an on-side V-shape or U-shape at the upper end of which is the exit from the freezer compartment of the associated evaporator. If refrigerant now arrives in this lying V-shaped evaporator tube section in the compressor standstill, gravity will counteract an overflow of refrigerant.

By dividing the evaporator plates into flexible individual boards, the

Adaptation to the refrigerated goods be made much better than before. For example, Rohrablösungen resulting from relative movements of

Evaporator tube and evaporator plate during bending can be avoided so. The refrigerant-carrying evaporator pipe sections can be less

Pressure losses than comparable evaporators, such as conventional Rollbond evaporator possess. This allows the entire evaporator to be operated much more efficiently. By arranging the evaporator pipe sections siphons can be avoided and the noise during the compressor run time can be greatly reduced if necessary. In addition, the front side of the freezer compartment, which is adjacent to the door seal, are primarily cooled. From the procedural point of view, a multiplicity of different types of evaporators, in particular evaporator plate arrangement forms, can be produced simply and cost-effectively with simple bending and adhesive devices. This also provides an easy way to

Refrigerant tuning, especially in single-circuit refrigeration systems.

In all embodiments of the invention, one evaporator plate may be connected to another evaporator plate through at least one web, one between a side edge of one evaporator plate and a side edge of the other

Evaporator plate lying gap bridged along which a transition region, such as an edge, corner and / or rounding of two abutting back

Surfaces of two differently oriented container walls comes to rest in the installation position of the evaporator plates.

According to the invention evaporator, in particular combination evaporator can be prepared in which, for example, the freezer compartment of all five sides with Refrigerant leading evaporator tubes is acted upon. In a front, in particular closable by a door leaf opening for insertion and

Removing refrigerated goods can take the five sides of the freezer from one

Ceiling wall, a rear wall, a bottom wall and two side walls are formed.

The evaporator plates according to the invention can by a common

Evaporator tube to be acted upon, optionally with an additional

Evaporator plate can be connected for a separate cooling compartment. By means of the evaporator plates connected by webs, in particular a one-piece solution can be created which, in contrast to fully connected evaporator plate sections, reduces bending effort and / or bending along one edge of two adjoining back sides of adjacent side walls of the freezer compartment is made easier, in particular more flexible. Thus, in particular when gluing the evaporator plates on the backs of the side walls of the

Inner container Air pockets are reduced, if not completely avoided. By avoiding trapped air, the cooling capacity can be improved on the inner container or in the storage spaces of the product. By means of the evaporator plates connected by webs of assembly work can be reduced compared to a multi-part design with completely separate evaporator plates. By means of the evaporator plates connected by webs can be used instead of complex and in the production of expensive Rollbond evaporator plates with shallow channels, in particular evaporator plates with attached evaporator tubes.

Compared to known winding evaporators connected by webs invention evaporator plates have the advantage that, depending on the design no

Beauschlagung the rear wall of the inner container with a separate additional evaporator plate is necessary. Rather, an evaporator plate can be bent along the webs in the plane of the rear wall of the inner container. In a compressor standstill period, ie when the compressor of the refrigerant cycle system is not in operation and consequently the refrigerant in the evaporator pipe is not conveyed through the compressor, the refrigerant from the evaporator pipe associated with the freezer compartment can still be in evaporator pipe sections of an evaporator associated with the refrigeration compartment, for example in refrigerated freezer combination appliances stream. This happens especially if, when the compressor is switched off in the

Refrigeration compartment evaporator has the same pressure as set in the freezer compartment evaporator. This is also referred to as pressure equalization in the compressor stop time. After this

Pressure equalization prevails, is typically a slow flow of refrigerant toward the compressor instead. Such a slow flow can be caused or at least intensified, for example due to absorption of refrigerant in the compressor oil or due to cooling of the compressor or its interior.

The embodiments according to the invention can be based in particular on tube plate evaporators. In this case, it is possible to use evaporator tubes or evaporator tube sections which are designed with a reduced number of tube bends. The evaporator plate blanks can be made in the manner of a cross from a plane

Sheet metal template are produced. The evaporator tubes, or evaporator tube sections may be arranged so that the areas of the freezer compartment, in which the largest heat input consists, are primarily flowed with refrigerant. Coming from the bottom of the freezer compartment, one side of the evaporator can be provided with an ascending evaporator tube section on the flow side. This is useful to the

To prevent overflow of the refrigerant during the off time of the compressor in a lower lying refrigeration compartment. Furthermore, the individual plates, the

in particular be glued to five sides of the freezer, be connected only with thin webs. This allows the evaporator tubes to be bent with bending radii optimized for the tube diameters.

The evaporator plates can be individually adapted to the layers, orientations and / or orientations of the back sides of the container walls by suitably flexible formation of the webs. This allows the evaporator plates with their front sides over the entire surface, in particular air bubbles freely on the backs of the

Container walls attached, in particular glued. By this procedure, a relative movement between the evaporator tubes, or evaporator tube sections and the evaporator plates can be avoided during bending, since there is no tube plate assembly in the bending area. This ensures a rich pipe system on the respective evaporator plates. In particular, evaporator tubes with inner diameters of about 6 mm can be used. The

On the other hand, refrigerated compartment evaporators can be produced separately as a separate evaporator in a special version.

The at least one web can be more flexible than one or more

Have evaporator tube sections, which are passed over the gap bridged by the web of the one evaporator plate to the other evaporator plate.

In one embodiment, two adjacent evaporator plates can be connected to each other by two or three webs. In another embodiment, the at least one web made of the material of the evaporator plates, in particular integrally with the adjacent

Be formed evaporator plates.

At least one evaporator plate, which at the back surface of the

Ceiling wall of the storage room is present and at least one other evaporator plate, which rests against the rear surface of the bottom wall of the storage room, can be connected by webs, in particular with the interposition of another

Evaporator plate, which bears against the rear surface of the rear wall of the storage room, be connected.

In all embodiments according to the invention, the at least one evaporator tube can be guided along at least five evaporator plates, of which at least three, in particular four or five, evaporator plates are connected via webs according to the invention as described.

Further features and advantages of the invention will become apparent from the following description of an exemplary embodiment with reference to the accompanying Characters. Concrete features of this embodiment may, as an alternative or in combination with one another, represent general features of the invention.

1 shows a schematic representation of an arrangement of evaporator plates and an evaporator tube with evaporator tube sections in a flat, unbent form,

2 is a perspective view of a rear side of an inner container of a

Household refrigerating appliance with the arrangement of evaporator plates and

Evaporator pipe sections shown in FIG. 1 in one at the back

Surfaces of the container walls of the inner container adapted, curved spatial form. Fig. 1 shows a section of an inner container 2 using the example of a

Domestic refrigerator 1. The inner container 2 has container walls 2a, 2b, 2c, 2d, 2e, which limit a coolable storage space 3 for refrigerated goods. In the illustrated

Embodiment, the storage room 3 is a freezer. The container walls 2a, 2b, 2c, 2d, 2e have back surfaces to which evaporator plates 5a, 5b, 5c, 5d, 5e of a refrigerant cycle system 4 arranged heat conductively, or fixed, in particular glued.

In the embodiment shown in Fig. 1 and Fig. 2, the

Refrigerant cycle system 4 five on the container walls 2a, 2b, 2c, 2d, 2e of the

Freezer compartment to be attached evaporator plates 5a, 5b, 5c, 5d, 5e.

The evaporator plate 5c which abuts against the rear surface of the ceiling wall, that is, on the container wall 2c of the storage space 3, and the evaporator plate 5a which abuts against the back surface of the bottom wall, ie, the container wall 2a of the storage space 3 are in the illustrated embodiment by webs 6th connected. In addition, another evaporator plate 5e, which abuts against the rear surface of the rear wall, that is, against the container wall 2e of the storage space 3, is interposed, ie the evaporator plate 5e is connected via webs 6 both to the evaporator plate 5c and the evaporator plate 5a.

Each two adjacent evaporator plates, ie in the exemplary embodiment

Evaporator plate 5a and the evaporator plate 5e and the evaporator plate 5c and the evaporator plate 5e are interconnected by three webs 6 each. The webs 6 are made of the material of the evaporator plates 5a, 5b, 5c, 5d, 5e, in particular integrally formed with the adjacent evaporator plates 5a, 5b, 5c, 5d, 5e.

The webs 6 bridge one between a side edge 7c of the one

The webs 6 also bridge a gap 8 located between a side edge 7a of one evaporator plate 5a and a side edge 7e of the other evaporator plate 5e. Along the gaps 8, as shown in FIG. 2, the transitional areas 9 of two abutting rear surfaces of two adjacently oriented container walls 2a, 2b, 2c, 2d, 2e lie in the installed position of the evaporator plates 5a, 5b, 5c, 5d, 5e. The transitional regions 9 may, for example, at right angles or at least approximately perpendicular to each other oriented, abutting surfaces of straight edges of a box-shaped or cuboidal

Inner container 2 or storage space 3 or refrigerator are formed. These edges can have a rounded contour.

The webs 6 have a higher flexibility than one or more evaporator tubes 10, or evaporator tube sections 10a, 10b, 10c, 10d, 10e, which are bridged over the gaps 8 bridged by the webs 6 from the one evaporator plate 5a, 5b, 5c, 5d, 5e are led away to another evaporator plate 5a, 5b, 5c, 5d, 5e.

In the exemplary embodiment of FIGS. 1 and 2, the evaporator tube sections 10 a, 10 b, 10 c, 10 d, 10 e are formed by a continuous, one-piece evaporator tube 10. The evaporator tube 10 has in the flow direction of the refrigerant, as indicated by the arrows in Fig. 1, a first evaporator tube section 10 c, which is laid along a voltage applied to those container wall 2 c evaporator plate 5 c, which Ceiling of the storage room 3 is assigned. Downstream of the first evaporator tube section 10c in the flow direction is a second evaporator tube section 10a, which is laid along an evaporator plate 5a adjacent to that container wall 2a, which is assigned to the floor of the storage room. One the second

Evaporator pipe section 10a downstream in the flow direction third

Evaporator pipe section 10e has an anti-gravity

Direction component has. The third evaporator tube section 10e is laid along an evaporator plate 5e adjacent to that container wall 2e, which is assigned a rear wall of the storage space 3. The evaporator tube 10 also has a fourth evaporator tube section 10b which is arranged in the flow direction between the first evaporator tube section 10c and the second evaporator tube section 10a and which is laid along an evaporator plate 5b adjacent to that container wall 2b which is assigned to a side wall of the storage space 3.

The evaporator tubes 10 with the evaporator tube sections 10a, 10b, 10c, 10d, 10e can optionally have a separate evaporator 12 for a separate storage room 14, in particular a frost-free refrigerated compartment, with a separate evaporator plate 13, and a further evaporator tube 11 to be connected to the evaporator tube 10 Flow direction to be connected subsequently.

Claims

1. Domestic refrigerating appliance, comprising an inner container (2), the at least one

Coolable storage space (3, 14) for refrigerated goods container walls limiting (2a, 2b, 2c, 2d, 2e) having rear surfaces, and a refrigerant circuit system (4) with at least two evaporator plates (5a, 5b, 5c, 5d, 5e), whose Front sides of differently oriented back surfaces of the container walls (2a, 2b, 2c, 2d, 2e) rest and the backs are covered with at least one evaporator tube (10), characterized in that the at least one evaporator tube (10) in the flow direction of the evaporator tube ( 10) has a first evaporator tube section (10c) which is laid along an evaporator plate (5c) adjacent to the container wall (2c) which is assigned to the ceiling of the storage space (3) and downstream of the first evaporator tube section (10c) second evaporator tube section (10a) which along one of those container wall (2a) adjacent

Evaporator plate (5a) is laid, which is associated with the bottom of the storage space (3) and a second evaporator tube section (10a) in the flow direction downstream third evaporator tube section (10e) having a counter to the gravity directional component.

2. Household appliance according to claim 1, characterized in that the third

Evaporator pipe section (10 e) along an on the container wall (2 e) adjacent evaporator plate (5 e) is laid, which a rear wall of

Storage room (3) is assigned.

3. Household appliance according to claim 1, characterized in that the third

Evaporator pipe section (10 e) along an on the container wall (2 e) adjacent evaporator plate (5 e) is laid, which a side wall of the

Storage room (3) is assigned.

4. Household appliance according to one of claims 1 to 3, characterized in that the evaporator tube (10) has a fourth evaporator tube section (10b) which in Flow direction between the first evaporator tube section (10c) and the second evaporator tube section (10a) is arranged and along an on the container wall (2b) adjacent evaporator plate (5b) is laid, which is associated with a side wall of the storage space (3).

Domestic appliance according to one of claims 1 to 3, characterized in that the evaporator tube (10) has a fourth evaporator tube section (10b) which is arranged in the flow direction between the first evaporator tube section (10c) and the second evaporator tube section (10a) and along a the container wall (2b) adjacent evaporator plate (5b) is laid, which is associated with a rear wall of the storage space (3).

Domestic appliance according to one of claims 1 to 5, characterized in that an evaporator plate (5a, 5b, 5c, 5d, 5e) with another evaporator plate (5a, 5b, 5c, 5d, 5e) by at least one web (6) is connected the one between a side edge (7a, 7c, 7e) of the one evaporator plate (5a, 5b, 5c, 5d, 5e) and a side edge (7a, 7c, 7e) of the other evaporator plate (5a, 5b, 5c, 5d, 5e bridged gap (8), along which a transition region, such as an edge, corner and / or rounding of two abutting back surfaces of two differently oriented container walls (2a, 2b, 2c, 2d, 2e) in the

Installation position of the evaporator plates (5a, 5b, 5c, 5d, 5e) comes to rest.

Domestic appliance according to claim 6, characterized in that the at least one web (6) has a higher flexibility than one or more evaporator pipe sections (10a, 10b, 10c, 10d, 10e) over the gap bridged by the at least one web (6) (8) from the one evaporator plate (5a, 5b, 5c, 5d, 5e) to the other evaporator plate (5a, 5b, 5c, 5d, 5e) are passed away.

Domestic appliance according to claim 6 or 7, characterized in that in each case two adjacent evaporator plates (5a, 5b, 5c, 5d, 5e) by two or three webs (6) are interconnected.

Domestic appliance according to one of claims 6 to 8, characterized in that the at least one web (6) made of the material of the evaporator plates (5a, 5b, 5c, 5d, 5e), in particular in one piece with the adjacent evaporator plates

(5a, 5b, 5c, 5d, 5e) is formed.

10. Household appliance according to one of claims 6 to 9, characterized in that at least one evaporator plate (5c), which rests against the rear surface of the ceiling wall of the storage space (3) and at least one other

Evaporator plate (5a), which rests against the rear surface of the bottom wall of the storage space (3), connected by webs (6), in particular under

Interposing another evaporator plate (5e), which bears against the rear surface of the rear wall of the storage space (3) are connected.

11. Household appliance according to one of claims 1 to 10, characterized in that the at least one evaporator tube (10) along at least five evaporator plates (5a, 5b, 5c, 5d, 5e) is performed, of which at least three, in particular four or five evaporator plates (5a, 5b, 5c, 5d, 5e) via webs (6) are connected according to one of claims 6 to 10.