EP3458784A1

EP3458784A1 - Refrigerator device and method for manufacturing same

Info

Publication number: EP3458784A1
Application number: EP17723695.7A
Authority: EP
Inventors: Christian Hein; Berthold Pflomm; Bernd Schlögel
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2016-05-18
Filing date: 2017-05-16
Publication date: 2019-03-27
Anticipated expiration: 2037-05-16
Also published as: EP3458784B1; WO2017198641A1; PL3458784T3; DE102016208494A1

Abstract

The invention relates to a refrigerator device, particularly a domestic refrigerator device, comprising at least one first and one second temperature zone (21, 25), a first evaporator (1) for cooling the first temperature zone (21) and a second evaporator (2) for cooling the second temperature zone (25). The two evaporators (1, 2) each comprise a flat structure (1', 2') which consists of a coolant pipe and is laid on at least one substrate (3), said evaporators being connected in series by a curved coolant tube section (17). A compensating throttle tube section (14) which extends to an injection point (15) of the first evaporator (1) is secured to said curved coolant tube section (17).

Description

Refrigeration appliance and method for its production

The present invention relates to a refrigeration appliance, in particular a domestic refrigerator, with a plurality of temperature zones, and a method for its production. If several temperature zones are to be cooled with evaporators connected in series, an evaporator area which is much larger in relation to their volume than the warmer one is needed for the colder temperature zone. Therefore, an evaporator is provided for refrigerators with normal refrigeration compartment and freezer compartment in the normal refrigeration compartment only on the rear wall, whereas the freezer compartment can be surrounded by up to five walls of evaporator plates. This necessarily three-dimensional structure makes the manufacture and assembly of the evaporator consuming.

From DE 8325574 U1 a refrigeration device with normal refrigeration compartment and freezer compartment is known, in which a manufactured in Rollbond technique board over the rear walls of

Normal refrigerated compartment and frost compartment extends. An injection point for the refrigerant and a port for a suction pipe are formed at the portion of the board attached to the back wall of the freezing compartment. In order to be able to cool the freezer compartment also via its other walls, a pipeline is routed to these and connected to terminals on the board.

The combination of different manufacturing techniques makes the evaporator structure consuming. Since refrigerant must flow back from the board section of the normal cooling compartment to that of the frost compartment to reach the suction line, there is an undesirable heat transport from the normal cooling compartment to the frost compartment.

EP 1 712 857 A2 proposes to replace the Rollbond evaporator for cost reasons by a structure with tube-on-sheet elements which are mounted on the different sides of the frost compartment and the rear wall of the normal refrigeration compartment. Again, the assembly is expensive, since obviously in the course of installation pipe sections of the various elements must be connected to each other. The object of the invention is to provide a refrigeration device with a plurality of temperature zones, in which an evaporator can be mounted inexpensively and reliably, and a method for its production.

The object is achieved on the one hand by a method for manufacturing a refrigeration device, in particular a household refrigerating appliance, with at least one first and one second temperature zone, in which

a) a first and a second sheet of refrigerant pipe are formed, which extend in a plane and are related by a pipe section, b) extending to an injection point of the first sheet

Throttle pipe section is attached to the connecting pipe section,

c) at least a portion of the first sheet, the second

Is adjacent, is pivoted out of the plane, and

d) the fabrics are approximated to each other while the connecting pipe section and the throttle pipe section attached thereto are curved.

Placement of the sheets in a plane allows easy and efficient forming of the refrigerant pipe sheets, particularly a single refrigerant pipe extending integrally throughout the sheets.

At least a portion of the first sheet must later be pivoted out of the plane to obtain in the finished refrigerator a first evaporator which extends at least on a rear wall and a second temperature zone facing wall of the first temperature zone. To close the gap between the first and second sheets, the sheets are approximated. The pipe section, which is the

Sheet structure connects, necessarily curved. By previously the

Throttle pipe section has been attached to this pipe section, it is forced to curve in the same manner as the connecting the fabrics

Pipe section; a kinking that could affect the permeability of the throttle pipe section and thus the functionality of the refrigerator is thus prevented.

The finished fabrics may then be mounted to inner containers of the first and second temperature zones. It can be out of the plane swung out portion of the first sheet in a space between the inner containers space.

In the context of step a), substrates, preferably in the form of good

thermally conductive sheets, are arranged in the plane to subsequently the

Fabric obtained by laying the refrigerant tube on the substrates.

Conveniently, the refrigerant tube can be attached to the substrates, so that dimensionally stable, easy to handle during subsequent installation in the refrigerator evaporator are formed. Alternatively, a thermally conductive substrate may first be attached to the inner containers to subsequently mount the sheets on the substrates. Since such a substrate does not have the task, the fabrics before their installation in the

To stabilize the refrigeration device, it can be very thin-walled and highly flexible. On the other hand, the problem is solved by a refrigeration device, in particular a

A household refrigerating appliance, comprising at least a first and a second temperature zone and a first evaporator for cooling the first temperature zone and a second evaporator for cooling the second temperature zone, wherein both evaporators each comprise a laid on at least one substrate layer of refrigerant pipe and through a curved refrigerant pipe section in Row are connected, and a extending to an injection point of the first evaporator compensation throttle pipe section is attached to the curved refrigerant pipe section.

A refrigeration appliance is understood in particular to mean a household refrigerating appliance, that is to say a refrigeration appliance that is used for household management in households or possibly also in the household

Gastronomy is used and in particular serves to store food and / or drinks in household quantities at certain temperatures, such as a refrigerator, a freezer, a fridge freezer, a freezer or a wine storage cabinet.

In order to ensure that the curvature of the equalizer throttle pipe section exactly follows that of the connecting pipe section, the throttle pipe section should connect to the Refrigerant pipe section at several distributed over its length points or even continuously attached.

The throttle pipe section may be secured to the curved refrigerant pipe section by a member surrounding and pressing against the connecting refrigerant pipe section and the throttle pipe section, such as a cable tie, a shrink tube, possibly wrapped around the pipe sections

self-adhesive tape or the like. Since the cable tie only a punctual

Secured fastening, the cable ties are preferably distributed to several over the length of the throttle pipe section.

Alternatively, the throttle pipe section may be fixed to the curved refrigerant pipe section by gluing, soldering or welding; In this way, a continuous attachment over at least part of the throttle pipe section is possible in particular.

Gluing can be achieved by placing an adhesive between them

Refrigerant pipe section and the throttle pipe section or by wrapping both done with an adhesive tape. The pipe section connecting the evaporators may be integral with the sheets extending on the substrates of the evaporators; Preferably, a single refrigerant pipe extends integrally from the injection point of the first evaporator at least to a suction port of the second evaporator. A per se known suction tube heat exchanger, which preheats the refrigerant vapor on the way to the compressor to a sowing the suction line and associated

Efficiency losses should be avoided here by a refrigerant circuit

Formed upstream of the equalizing throttle pipe section throttling pipe section and a suction pipe located downstream of the second evaporator.

In order to avoid undesired heat transport from the second to the first temperature zone, the suction tube, unlike in DE 8325574 U1 shown, should start from the second sheet. The first and second temperature zones of the refrigerator are preferably separated by a wall in which a portion of the first evaporator extends. This part and a part of the first evaporator, which occupies a back wall of the first temperature zone, may have separate or one-piece contiguous substrates.

The curved refrigerant pipe section can then each connect to the rear walls of the first and second temperature zones arranged parts of the evaporator and be deflected towards the front edge of the wall.

The first and the second temperature zones are preferably delimited by a common one-piece inner container, which if necessary can also form the above-mentioned wall.

Further features and advantages of the invention will become apparent from the following description of embodiments with reference to the accompanying figures. Show it:

Fig. 1 evaporator for a refrigerator according to a first embodiment of the

Invention in a planar arrangement;

Fig. 2 shows an arrangement in which portions of the evaporator from the plane

have swung out;

Fig. 3 is a partial view of an inner container of the refrigerator with the thereto

mounted evaporators; and

Fig. 4 shows a sheet of refrigerant pipe and an inner container for a

Refrigerating appliance according to a second embodiment of the invention.

Fig. 1 shows an arrangement of evaporators in an early stage of mounting a refrigerator according to the invention. The evaporators 1, 2 here comprise mutually separate metallic substrates 3 which are spread out on a base, not shown, and on each of which a fabric V, 2 'of meandering refrigerant pipe 7 is laid and soldered or fastened in another suitable manner. The Substrates 3 can be rigid sheets in this case. The one refrigerant tube 7 extends here in one piece continuously through both evaporators 1, 2. The substrate 3 of the evaporator 1 is here divided into three sections 4, 5, 6. The sections 4, 5, 6 may be physically separate as shown, but they could also be made in one piece coherent and possibly delimited by a subsequent bending facilitating slots from each other. The substrate 3 of the evaporator 2 is in one piece.

To a downstream port 8 of the evaporator 2, a suction pipe 9 is attached, which is provided to be connected in a later stage of assembly with a compressor (not shown) of the refrigerator. Between two

By piercing 10, 1 1, a throttle pipe 12 is guided within the suction pipe 9 to form a suction tube heat exchanger 13 in a conventional manner. A portion 14 of the throttle tube 12 extends next to the substrate sections 6, 5 up to an injection point 15 at one of the other substrate sections, from the puncture 1 1 located here near the connection 8 between the substrate section 6 of the evaporator 1 and the evaporator 2 5, 6 facing away from the corner of the substrate portion. 4

In the fabric V, the refrigerant pipe 7 extends from the injection point 15 in meanders over the substrate portion 4 to one of the injection point 15th

opposite corner, bridges there a gap between the substrate sections 4, 5, traverses the substrate section 5 and a further gap in a straight line, runs in meanders over the substrate section 6 and finally returns to

Substrate section 5 back to form there more meanders. The refrigerant tube 7 leaves the substrate portion 5 at a short edge 16 and then forms a straight pipe section 17, which adjacent to the portion 14 of the throttle tube 12 adjacent to this edge 16 and an edge 18 of the evaporator section 6 ago

Evaporator 2 extends to transition into its sheet 2 '.

The side by side running portions 14 of the throttle tube 12 and 17 of the

Refrigerant tube 7 are shown in Fig. 1 during Umwickeins with an adhesive tape 19. After completion, the wrapping should extend over the entire length of the edge 18 of the evaporator section 6. Instead of the adhesive tape 19, the sections 14, 17 could also be fastened to one another by a plurality of cable ties distributed over their length, whereby they must be tightened so tightly that they do not along the sections 14, 17 to slip or prevent slippage of the sections 14, 17 against each other in their longitudinal direction. Other alternatives are the soldering or welding of the sections 14, 17 with each other, wherein here too the sections 14, 17 should preferably be connected to each other at a plurality of spaced-apart points or continuously.

Since the arrangement in the configuration of FIG. 1 can be stacked in a space-saving and safe manner, it can be prefabricated and transported to a location at which it is to be installed in the refrigeration device. At the installation site, the substrate sections 4 and 6 are folded out of the plane of the section 5 and of the evaporator 2 as shown in FIG. 2, and subsequently, as can be seen in FIG. 3, on a ceiling 20 or a floor of a first temperature zone 21 forming frost compartment of a conventional manner of plastic one-piece

deep-drawn inner container 22 to be attached.

After folding the substrate section 6 into the vertical gap between the provided for attachment to a rear wall 23 of the freezing compartment substrate portion 5 and provided for attachment to a rear wall 24 of a second temperature zone 25 forming the normal cooling compartment evaporator 2 a wide gap 26. This has largely closed be so that the evaporator 2 can be mounted on the normal refrigeration compartment close to the ceiling 27 and the effective cooling of the normal refrigeration compartment over its entire height. Therefore, when the evaporator 2 is moved toward the substrate portion 5 of the frost compartment as shown by arrows A in Fig. 2, the mutually attached portions 14, 17 of the throttle tube 12 and the refrigerant pipe 7 are deflected downwardly in accordance with an arrow B. Due to its relatively large diameter, the refrigerant tube 7 prevents kinking of the sections 14, 17 at a small radius, which could lead to a closure or an excessive cross-sectional constriction of the section 14. Due to the deflection, the sections 14, 17, as shown in Fig. 3, get a hairpin-like curved course with two straight or slightly curved

Legs 28 and a leg 28 connecting, highly curved bow 29. The ceiling 27 of the normal refrigeration compartment 25 and the bottom of the freezer compartment delimit a gap, which is later foamed to form a wall 30 between the frost compartment 21 and the normal refrigeration compartment 25. In this wall 30 or in an adjacent region of a side wall of the body, the curved sections 14, 17 place in the finished refrigeration device, the arch 29 facing a front edge 31 of the wall 30. Fig. 4 shows sheets 1 ', 2' for a refrigerator according to a second embodiment of the invention in an analogous to Fig. 1 perspective view. The course of the refrigerant tube 7 in these fabrics 1 ', 2' is the same as in Fig. 1; However, there are no substrates 3, on which in Fig. 1, the refrigerant pipe 7 is attached. The meanders of the fabrics V, 2 'are here shaped by the refrigerant pipe 7 was wrapped around projections 32 of a work pad 33. The shape of the sheet 1 ', 2' is fixed by the arrangement of the projections 32 and can be reproduced as often as quickly and accurately without measuring by the finished fabric V, 2 'lifted from the work pad 33 and the

Working document 33 is used again.

Like the evaporator assemblies in the configuration of FIG. 1, the finished, one-piece continuous sheets V, 2 'can be stacked and transported to save space, to be shown later on one shown in the lower part of FIG

Inner container 22 to be mounted.

The shape of this inner container 22 is the same as in Fig. 3; between the ceiling 27 of a normal refrigeration compartment 25 and the bottom of a frost compartment 21, a gap extends. In contrast to the case of FIG. 3, heat-conducting substrates 3 are attached to the rear walls 23, 24, of the normal refrigerated compartment 25 and freezer compartment, to a ceiling 20 and to the bottom of the freezer compartment 21. These substrates 3 are thin metallic foils, e.g. made of aluminium. Due to their small thickness, these substrates can be processed with minimal effort, e.g. by unwinding from a roll and tearing along a cutting edge, provided in the required length and adhered to the inner container 22. In the case shown here, the number of substrates to be attached is minimized by a substrate extending integrally over the ceiling 20, rear wall 23 and bottom of the frost compartment 21.

By bending along two dot-dash lines two sections 4 ', 6' of the fabric V from the plane of the sheet 2 'are folded out, while a middle portion 5 'of the sheet 1' remains in this plane or a plane parallel to it. The arrangement thus obtained is adhered to the substrates 3 thermally conductive, wherein the section 6 'at the bottom and the section 4' on the ceiling 20 of the freezing compartment 21 finds room.

REFERENCE NUMBERS

1 evaporator

r fabrics

2 evaporators

2 'fabrics

3 substrate

4 substrate section

4 'section of the fabric 1

5 substrate section

5 'section of the fabric 1

6 substrate section

6 'section of the fabric 1

7 refrigerant pipe

8 connection

9 intake manifold

10 Puncture

1 1 Puncture

12 throttle tube

13 Suction tube heat exchanger

14 section (of the throttle tube)

15 injection point

16 edge

17 section (of the refrigerant pipe)

18 edge

19 tape

20 blanket

21 frost compartment

22 inner container

23 rear wall

24 back wall

25 standard refrigerated compartment

26 gap 27 ceiling

28 thighs 29 bow

30 wall

31 front edge 32 projection 33 work support

Claims

Method for manufacturing a refrigeration device, in particular a

Domestic refrigerating appliance, with at least a first and a second

Temperature zone (21, 25), in which

a) a first and a second sheet (1 ', 2') are formed from refrigerant pipe, which extend in a plane and are connected by a pipe section (17),

b) a to an injection point (15) of the first sheet (1 ')

extending throttle pipe section (14) is attached to the connecting pipe section (17),

c) at least a portion of the first sheet (1 ') that is adjacent to the second sheet (2') is pivoted out of the plane, and d) the sheets (1 ', 2') approach each other while the connecting pipe portion (17) and the throttle pipe section (14) attached thereto are curved.

The method of claim 1, wherein

e) the sheets (1 ', 2') are mounted on walls (20, 23, 24) of the first and second temperature zones (21, 25).

A method according to claim 1 or 2, wherein in step a) substrates (3) of a first and a second evaporator (1, 2) are arranged in the plane and the sheets (1 ', 2') by laying the refrigerant pipe (7) on the substrates (3).

The method of claim 2, wherein prior to step e), a thermally conductive substrate (3) is attached to the walls (20, 23, 24).

Refrigerating appliance, in particular household refrigerating appliance, with at least one first and one second temperature zone (21, 25) and a first evaporator (1) for cooling the first temperature zone (21) and a second evaporator (2) for cooling the second temperature zone (25) characterized in that both evaporators (1, 2) each have a laid on at least one substrate (3) Comprise fabric sheets (1 ', 2') of refrigerant pipe and are connected in series by a curved refrigerant pipe section (17), and in that a compensating throttle pipe section (14) extending to an injection point (15) of the first evaporator (1) is formed on the curved refrigerant pipe section (FIG. 17) is attached.

6. Refrigerating appliance according to claim 5, characterized in that the compensating throttle pipe section (14) is secured to the curved refrigerant pipe section (17) at a plurality of points distributed over its length.

7. Refrigerating appliance according to claim 5 or 6, characterized in that the

Throttle pipe section (14) on the curved refrigerant pipe section (17) by a curved refrigerant pipe section and the compensating throttle pipe section surrounding and pressing them together element (19) is attached.

8. Refrigerating appliance according to claim 5 or 6, characterized in that the

Throttle pipe section on the curved refrigerant pipe section (17) is fixed by gluing, soldering or welding.

9. Refrigerating appliance according to one of claims 5 to 8, characterized in that the evaporator (1, 2) connecting pipe section (17) with the on the substrates (3) of the evaporator (1, 2) extending sheets (1 ', 2 ') is in one piece.

10. Refrigerating appliance according to one of claims 5 to 9, characterized in that a refrigerant pipe (7) integrally from the injection point (15) of the first

Evaporator (1) extends at least to a suction port (8) of the second evaporator.

1 1. Refrigerating appliance according to one of claims 5 to 10, characterized in that in the refrigerant circuit upstream of the equalizing throttle pipe section (14) located portion of the throttle tube (1 1) and downstream of the second evaporator (2) located suction pipe (9) has a heat exchanger (13 ) form.

12. Refrigerating appliance according to claim 1 1, characterized in that the suction tube (9) from the second sheet (2 ') starts.

13. Refrigerating appliance according to one of claims 5 to 12, characterized in that the first and the second temperature zone (21, 25) are separated by a wall (30) in which a portion (6) of the first evaporator (1) extends ,

14. Refrigerating appliance according to claim 13, characterized in that the curved

Refrigerant pipe section (17) respectively at rear walls (23 24) of the first and second temperature zone arranged portions (2 ', 5') of the sheet (1 ', 2') connects and to the front edge (31) of the wall (30) is deflected out ,

15. Refrigerating appliance according to one of claims 5 to 14, characterized in that the first and the second temperature zone (21, 25) by a common one-piece inner container (22) are limited.