EP2612089B1 - Refrigeration device and method for producing the same - Google Patents

Description

The present invention relates to a refrigeration device with a refrigerated goods container, and to a method for producing a refrigeration device.

In refrigerators, a refrigerant is typically conducted in a closed circuit. In this case, the refrigerant is first compressed by a compressor, condensed in a first heat exchanger with heat dissipation, expanded with a throttle and evaporated in a second heat exchanger at low temperature while absorbing heat. As a second heat exchanger tube evaporator are known which can be arranged in a refrigerated goods. During operation, the tube evaporator receives heat through the refrigerated goods container, which thus leads to cooling of the space inside the refrigerated goods container.

Pipe evaporators are often formed as a coil, which meanders over a certain area to achieve favorable heat exchange conditions.

The publication DE 10 2005 057 157 A1 shows a circulating air refrigerator and a mounting method for it.

The publication GB 1 021 496 A shows a device for storing or fixing pipes.

The Utility Model DE 79 17 005 U1 shows a refrigerated cabinet comprising a carrier for attaching a condenser.

The publication WO 2007/099072 A2 shows a refrigeration device comprising an evaporator holding device for holding an evaporator, wherein the evaporator holding device consists of a profile element.

It is an object of the present invention to provide a refrigeration device, the tube evaporator can be attached to the refrigerated goods container of the refrigerator in a flexible manner.

A refrigeration appliance is understood in particular to be a household refrigeration appliance, that is to say a refrigeration appliance used for household purposes or possibly even in the gastronomy sector, and in particular for storing food and / or beverages in household quantities at specific temperatures, such as, for example, a refrigerator, a freezer or a fridge freezer combination.

The object is achieved by a refrigeration device according to claim 1 and a method according to claim 8.
A refrigerator is provided which has a refrigerated goods container with a wall, and a tube evaporator arranged in the refrigerated goods container, in particular along this wall, wherein the tube evaporator is fastened to the wall of the refrigerated goods container by means of a latching device.

Thus, it can be ensured that the tube evaporator can be easily attached to the refrigerated goods container. Due to the latching connection, the tube evaporator can be detachably fastened to the refrigerated goods container.

The locking device may have at least one clip which is mounted on the wall of the refrigerated goods container or connected thereto. The clip can be designed to hold the tube evaporator by means of a first latching connection. This allows the storage of the tube evaporator by means of a simple assembly step.

Further, the latching device may comprise a spacer, which is adapted to keep the tube evaporator spaced a predetermined distance from the wall, and the clip may be configured to hold the spacer by means of a second latching connection. By means of such a two-part latching device, the tube evaporator can be fastened at different distances from the wall of the refrigerated goods container. The spacer can hold the tube evaporator at a suitable distance from the wall of the refrigerated goods container, so that a favorable for the temperature regulation in Kühlgutbehälter air circulation is achieved. Furthermore, such an embodiment of the clip allows a manufacturing method in which in a first step, the evaporator tube is clipped in a simple manner with the clip on the wall, is released after the foaming of the wall, and finally the spacer attached to the clip on the wall becomes.

The spacer can be designed in particular as a bar, which allows easy installation of the tube evaporator in Kühlgutbehälter.

The clip may, for example, have a base plate mounted on the wall of the refrigerated goods container and two legs projecting from the base plate. This allows a simple design of the clip.

It can be provided on the inside of the legs locking lugs, which are designed to hold the tube evaporator detent. Further, locking lugs may be provided on the outer side of the legs, which are designed to hold the spacer detent. Thus, the legs can do twice the function meet, on the one hand to keep the tube evaporator and on the other hand serving as a spacer bar latching.

The base plate can be arranged in a depression on an outer side of the wall of the refrigerated goods container and the legs can be guided through an opening in the wall of the refrigerated goods container. Thus, an attachment of the clip on refrigerated goods is possible with little effort.

The wall may for example be a ceiling wall of the refrigerated goods. Thus, an advantageous temperature distribution in the refrigerated goods can be achieved, which leads to a reduction in the standard energy consumption of the refrigerator.

The latching device can be arranged in the front region of the refrigerated goods container. If the tube evaporator is guided through the rear wall of the refrigerated goods container and is mounted on this passage, thus securing the tube evaporator is achieved with a few fasteners.

According to one aspect, a method for producing a refrigeration device, which has a refrigerated goods container with a wall, and a tube evaporator arranged in the refrigerated goods container along this wall, comprises the following step: attaching the tube evaporator to the wall of the refrigerated goods container by means of a latching device. By this method, the advantages described above can be achieved.

• Anlegen des Rohrverdampfers an einer Wandung des Kühlgutbehälters und Befestigen des Rohrverdampfers mittels des Clips;
• Umschäumen des Kühlgutbehälters mit einem wärmeisolierenden Material;
• nach dem Umschäumen, Lösen des Rohrverdampfers von dem Clip;
• Befestigen des zweiten Rohrverdampfers an dem Abstandshalter; und
• Befestigen des Abstandshalters an dem Clip.

In this method, the locking device may comprise at least one clip and a spacer. Furthermore, the method can have the following steps:

• Applying the tube evaporator to a wall of the refrigerated goods container and attaching the tube evaporator by means of the clip;
• Foaming the refrigerated goods container with a heat-insulating material;
• after foaming, loosen the tube evaporator from the clip;
• Attaching the second tube evaporator to the spacer; and
• Attach the spacer to the clip.

Thus, the tube evaporator before and after foaming with the same holding means, namely the clip, held or fixed.

The tube evaporator can, during foaming close to the wall, which may be in particular a top wall of the refrigerated goods, antigenic.

Since the tube evaporator rests tightly against the wall of the refrigerated goods container during foaming, the tube evaporator can absorb the foaming pressure acting through the wall so that deformation of the wall can be prevented.

Fig. 1

eine perspektivische Ansicht eines Kühlgutbehälters eines Kältegeräts,

Fig. 2

eine perspektivische Ansicht eines Rohrverdampfers,

Fig. 3

eine perspektivische Schnittansicht durch ein Kältegerät,

Fig. 4a

eine perspektivische Ansicht einer Leiste,

Fig. 4b

eine Draufsicht auf die Leiste,

Fig. 4c

eine linke Seitenansicht der Leiste,

Fig. 4d

eine rechte Seitenansicht der Leiste,

Fig. 4e

eine Vorderansicht der Leiste,

Fig. 4f

eine Schnittansicht durch die Schnittlinie A-A in Fig. 4b.

Fig. 4g

eine Schnittansicht durch die Schnittlinie B-B in Fig. 4b.

Fig. 4h

eine Schnittansicht durch die Schnittlinie C-C in Fig. 4b.

Fig. 5a

eine erste perspektivische Ansicht eines Clips zum Befestigen der Leiste,

Fig. 5b

eine zweite perspektivische Ansicht des Clips,

Fig. 5c

eine Seitenansicht des Clips,

Fig. 5d

eine Vorderansicht des Clips,

Fig. 5e

eine erste Schnittansicht des Clips durch die Schnittlinie A-A in Fig. 5c,

Fig. 5f

eine zweite Schnittansicht des Clips durch die Schnittlinie B-B in Fig. 5d,

Fig. 6

eine von der Rückseite her betrachtete perspektivische Ansicht des Kühlgutbehälters,

Fig. 7

eine perspektivische Ansicht der Sicherung der Clips mit Klebebändern,

Fig. 8

eine perspektivische Ansicht des Deckenbereichs des Kühlgutbehälters,

Fig. 9

eine perspektivische Schnittansicht durch das Kühlgerät, und

Fig. 10

eine weitere perspektivische Schnittansicht durch das Kühlgerät.

Further embodiments will be explained with reference to the accompanying drawings. Show it:

Fig. 1

a perspective view of a refrigerated goods container of a refrigeration device,

Fig. 2

a perspective view of a tube evaporator,

Fig. 3

a perspective sectional view through a refrigerator,

Fig. 4a

a perspective view of a bar,

Fig. 4b

a top view of the strip,

Fig. 4c

a left side view of the bar,

Fig. 4d

a right side view of the bar,

Fig. 4e

a front view of the bar,

Fig. 4f

a sectional view through the section line AA in Fig. 4b ,

Fig. 4g

a sectional view through the section line BB in Fig. 4b ,

Fig. 4h

a sectional view through the section line CC in Fig. 4b ,

Fig. 5a

a first perspective view of a clip for attaching the bar,

Fig. 5b

a second perspective view of the clip,

Fig. 5c

a side view of the clip,

Fig. 5d

a front view of the clip,

Fig. 5e

a first sectional view of the clip through the section line AA in Fig. 5c .

Fig. 5f

a second sectional view of the clip through the section line BB in Fig. 5d .

Fig. 6

a perspective view of the refrigerated goods container viewed from the rear,

Fig. 7

a perspective view of securing the clips with adhesive tapes,

Fig. 8

a perspective view of the ceiling portion of the refrigerated goods,

Fig. 9

a sectional perspective view through the refrigerator, and

Fig. 10

another perspective sectional view through the refrigerator.

Unless otherwise indicated, like reference numerals in the figures denote like or functionally identical elements.

Fig. 1 2 shows a perspective view of a refrigerated goods container 110 of a refrigeration device 100 wrapped with a tube evaporator 130. The refrigerated goods container 110 essentially has the shape of a cuboid open toward the front and cut backwards with a top wall 120, bottom walls 122 and 124, left and right side walls 126 and 128 and a stepped rear wall defining an interior 160. The refrigerated goods container 110 may be made of plastic, for example. The open front side of the refrigerated goods container 110 is surrounded by a frame 140. In each case two receiving latches 150 are provided in the side walls, with which dividing walls for vertical subdivision of the refrigerated goods container can be accommodated.

The refrigerated goods container 110 is wrapped with a first tube evaporator 130, which is arranged outside the refrigerated goods container 110. In operation, the first tube evaporator 130 is charged with a refrigerant which evaporates while absorbing heat. In this case, the first tube evaporator 130 receives heat through the refrigerated goods container 110, which thus leads to a cooling of the interior of the refrigerated goods container 110.

Within the refrigerated goods 110 and in the present example in the ceiling area, so near the ceiling wall 120, a second tube evaporator 200 is provided in the form of a tiered storage, which in Fig. 2 is shown in perspective view. The second tube evaporator 200 comprises an evaporator tube 210 and a multiplicity of transverse ribs 220. The evaporator tube 210 comprises, for example, ten straight tube sections 210a, two of which are connected at their ends by bent tube sections 210b, so that the evaporator tube 210 extends meandering in a plane , The transverse ribs 220 are formed, for example, as straight pieces of wire and are arranged on the two sides of the evaporator tube 210 and attached thereto, for example, by soldering or the like. In this case, the transverse ribs 220 extend between the second and the penultimate straight pipe section 210a, so that the distance between the Both pipe ends 230 by compression or extension is easily changed and the two pipe ends 230 can be easily unscrewed from the plane defined by the transverse ribs 220 level. By the transverse ribs 220, the pipe sections are held together, so that the evaporator tube 210 is provided with a certain rigidity. On the other hand, they improve the heat exchange properties of the evaporator tube 210.

The two outer straight pipe sections 210 a are guided through the rear wall of the refrigerated goods container 110. These two outer straight pipe sections 210a serve as a supply and discharge of the tube evaporator 200th

Due to the provision of the second tube evaporator 200, a more uniform temperature distribution within the refrigerated goods container 110 is achieved, which leads to a reduced standard energy consumption of the refrigeration device. In this case, the first tube evaporator 130 and the second tube evaporator 200 can be connected in series with each other in terms of flow. Thus, both tube evaporators 130, 200 are operated via only one cooling circuit and no further compressors, valves or the like need be provided for the additional evaporator. On the input side, the tube evaporator 130, 200 to a throttle valve, not shown, and on the output side to a compressor, e.g. a linear compressor, not shown, be connected.

Fig. 3 shows a perspective sectional view through a refrigerator 100, wherein the section in a direction perpendicular to the first tube evaporator 130 runs. In this refrigeration appliance 100, the second tube evaporator 200 is fastened to the ceiling wall 120 by means of a latching device in the front region of the refrigerated goods container 110. The locking device comprises a strip 400, which serves as a spacer, as well as clips 500.

As in the Fig. 3 recognizable, the second evaporator tube 210 is inserted into the bar 400, which in turn is plugged into the clips 500 provided in the ceiling area. The advantage of this arrangement is that the second evaporator tube 210 is held at a predetermined distance from the ceiling wall 120. Thus, a better cooling circulation in the refrigeration device 100 can be ensured.

Fig. 4a - 4h show various views of the strip 400 for attachment of the second tube evaporator 200th Fig. 4a shows a perspective view of the bar 400. Fig. 4b shows a top view of the bar 400. Fig. 4c shows a left side view of the bar 400. Fig. 4d shows a right side view of the bar 400. Fig. 4e shows a front view of the bar 400. Fig. 4f shows a sectional view through the section line AA in Fig. 4b , Fig. 4g shows a sectional view through the section line BB in Fig. 4b , Fig. 4h shows a sectional view through the section line CC in Fig. 4b ,

The strip 400 comprises a strip rear wall 410, from which a bottom wall 420 and a middle wall 430 protrude from one another at a distance from one another. The strip rear wall 410, the bottom wall 420 and the middle wall 430 define a recess in which the second evaporator tube 210 is accommodated and fixed with latching noses 440. Furthermore, the strip 400 is provided with two clip receptacles 450, which are spaced from each other along the strip rear wall 410 are provided. These clip receptacles 450 essentially have the shape of an upwardly open cuboid whose rear wall is formed by the strip rear wall 410 and whose bottom is formed by the middle wall 430. In the strip rear wall 410 arranged opposite front wall 460, a through hole is arranged and above this through hole, a locking lug 470 is arranged. Opposite of this locking lug 470, a further locking lug 470 is arranged on the strip rear wall 410. By cooperation of these locking lugs 470 with the legs of the clip 500, the strip 400 can be fixed to the clips 500. At the upper end of the strip rear wall 410 is laterally from a slightly curved, flexible lip 480. If the strip 400 is attached to the ceiling wall 120, then this lip 480 holds the strip 400 under slight tension on the ceiling wall 120. Thus tolerances are compensated and it is a possible rattling of the bar on the ceiling wall 120 is prevented.

Fig. 5a shows a first perspective view of a clip 500 for attaching the bar 400. Fig. 5b shows a second perspective view of the clip 500. Fig. 5c shows a side view of the clip 500. Fig. 5d shows a front view of the clip 500. Fig. 5e shows a first sectional view of the clip 500 through the section line AA in Fig. 5c , Fig. 5f shows a second sectional view of the clip 500 through the section line BB in Fig. 5d ,

The clip 500 has a substantially rectangular base plate 510 and two legs 520 which project from one side of the base plate 510 and are slightly bent toward each other. The clips 500 may each be about 10 to 15 mm high, 35 to 45 mm long and 20 to 25 mm wide.

The legs 520 are provided both on their inside and on their outside with locking lugs 530 and 540.
More specifically, the free ends of the legs 520 form latching lugs 530 that extend across the entire width of the legs 520. When the evaporator tube 210 is clipped onto the clips 500, the latching lugs 530 can grip behind the evaporator tube and thus hold or fasten it in a latching manner.

Two locking lugs 540 are provided on the outside of each of the legs 520. When the strip 400 is clipped onto the clips 500, these latching noses 540 engage behind the latching noses 470 on the strip 400 and can thus hold or fasten the strip 400 in detent fashion and fix it on the ceiling wall 120.

The clips 500 are thus designed such that on the one hand they can hold the evaporator tube 210 and, on the other hand, the strip 400 in latching fashion. In this case, the evaporator tube 210 is held with the inside of the legs 520 and the strip 400 with the outside of the legs 520. This embodiment of the clips 500, an advantageous method for producing the refrigeration device can be realized, as shown in the FIGS. 7 to 9 is illustrated.

In a first step of the manufacturing process, the clips 500 are placed from the outside of the refrigerated goods 110 in impressions in the top wall 120 of the refrigerated goods 110, wherein the legs of the clips 500 are passed through through holes 610 in the top wall 120 of the refrigerated goods 110, after which the clips 500 For example, with tape 640 can be secured. It results in the Fig. 7 illustrated situation that the clips 500 protrude freely from the ceiling wall 120 in the interior 160 of the refrigerated goods 110.

In the next step, the second tube evaporator 200 is pushed into the interior 160 of the refrigerated goods container 110, the tube ends 230 of the second tube evaporator 200 are passed through through holes 630 in the rear wall 620 of the refrigerated goods container 110, and the second tube evaporator 200 is clipped on two of its bent pipe sections 210 b with the clips 500 on the ceiling wall 120. Next, the refrigerated goods container 110 is wrapped with the first tube evaporator 130. Thereafter, the first tube evaporator 130 and the second tube evaporator 200 may be connected to each other by welding or the like. It should be noted that the first and second tube evaporators 130 and 200 may also be mounted in reverse order.

The refrigerated goods 110 is now pushed into a not-shown outer housing with a device outer wall and fixed it. Further, in the inner space 160 of the refrigerated goods container 110, a foaming core made of aluminum or the like is placed. This foaming core is used for stabilization and is dimensioned such that the underside of the second tube evaporator 200 rests on the top of the foaming core. At this time, the middle pipe portions 210a stiffened by the transverse ribs 220 are pushed up, and the upper end of the foaming core is disposed between the outermost straight pipe portions 210a. In other words, in this state, the outermost straight pipe sections 210a extend through a plane other than the middle pipe sections 210a, which extend as shown in FIG Fig. 9 shown below the ceiling wall 120 parallel to the same. More specifically, in this state, the outer straight pipe sections 210a extend obliquely from the two through holes in the rear wall to the clips 500 disposed in the front region of the refrigerated goods container. Furthermore, the foaming core can support the rear wall 620 and the side walls of the refrigerated goods container 110 from the inside.

Thus, it is also apparent why the transverse ribs 220 do not extend over all the straight pipe sections 210a. If this were the case, then the middle straight pipe sections 210a could not be pressed against the ceiling wall 120 with the foaming core.

In the next step, the space between the refrigerated goods 110 and the device outer wall is filled with a heat-insulating material. Since the second tube evaporator 200 fits tightly against the ceiling wall 120, it stabilizes the ceiling wall 120 on the one hand and gives the pressure resulting from the foaming on the other hand on the ceiling wall 120 to the foaming core, so that a deformation or denting of the ceiling wall 120 can be prevented. In the figures, neither the device outer wall nor the heat-insulating foam are shown for illustrative reasons.

After foaming, the second tube evaporator 200 is released from the clips 500 and slightly lowered at its front, as in Fig. 10 is shown. The straight pipe sections 210a are brought back into a plane. Thereafter, the strip 400 is plugged into the second tube evaporator 200. Finally, the strip 400 is clipped or fixed to the clips 500. It results in the Fig. 3 illustrated state. Thus, the second tube evaporator 200 is no longer close to the ceiling wall 120, but is spaced therefrom, so that there is an advantageous refrigeration circulation within the refrigerated goods 110.

In this state, the tube evaporator 200 is forward over the bar 400 and the clips 500 are attached to the ceiling wall. In the ready-to-use state, the refrigerated goods container 110 can be surrounded on five sides by the device outer wall and can be closed to the front with a door.

With the above-described method, during the foaming operation, the second tube evaporator 200 closely abuts against the ceiling wall 120 and stabilizes it, so that it can be prevented from being deformed due to the foam pressure and dented inward. Furthermore, all soldering operations on the second tube evaporator 200 can already be carried out by the foaming. In particular, the output-side end of the first tube evaporator 130 can be soldered to the input-side end of the second tube evaporator 200 and then tested for leaks before foaming. If, however, the second tube evaporator 200 is used only after foaming, then an additional step for testing the tightness is necessary.

As described above, the clips 500 are configured such that they can accommodate and hold the evaporator tube 210 while the tube evaporator 200 abuts against the ceiling wall 120, and can receive the strip 400 and store it on the ceiling wall 120. Thus, the above-described Manufacturing process can be carried out simply because in a first step, the evaporator tube 210 can be easily clipped with the clips 500 on the ceiling wall 120, after the foaming of the ceiling wall 120 can be solved and finally serving as a spacer bar 400 with the clips 500th can be attached to the ceiling wall 120.

Furthermore, the attachment of the tube evaporator 200 on the refrigerated goods 110 can be easily solved by the bar 400 is detached from the clips 500 is removed from the tube evaporator 200, which allows easy disposal or recycling of the refrigerator 100.

In the above example, a locking device with two clips 500 and a bar 400 has been described. However, the locking device may also include only one or three or more clips 500 or multiple strips 400.

Also, the tube evaporator 200 does not necessarily have to be mounted along the ceiling wall 120, but may for example also be provided on the rear wall 620 of the refrigerated goods container 110.

LIST OF REFERENCE NUMBERS

100

The refrigerator

110

refrigerated goods

120

ceiling wall

122, 124

bottom walls

126, 128

side walls

130

first tube evaporator

140

frame

150

recording catches

160

inner space

500

clips

200

second tube evaporator

210

evaporator tube

210a

straight pipe sections

210b

curved pipe sections

220

transverse ribs

230

pipe ends

400

strip

410

rear wall

420

bottom wall

430

center wall

440

locking lugs

450

clips images

460

front wall

470

locking lugs

480

lip

500

clip

510

baseplate

520

leg

530

locking lugs

540

locking lugs

600

indentations

610

Through holes

620

rear wall

630

Through holes

640

duct tape

Claims (10)

1. Refrigeration device, having a container for refrigerated products (110) with a wall (120), and a tube evaporator (200) disposed in the container for refrigerated products (110), characterised in that the tube evaporator (200) is fastened to the wall (120) of the container for refrigerated products (110) by means of a two-part snap-fit device (400, 500), wherein the snap-fit device (400, 500) has at least one clip (500), which is supported on the wall (120) of the container for refrigerated products (110) or connected thereto, wherein the clip (500) is embodied to hold the tube evaporator (200) by means of a first snap-fit connection, wherein the snap-fit device (400, 500) has a distance holder (400) which is embodied to keep the tube evaporator (200) at a predetermined distance from the wall (120), and the clip (500) is embodied to hold the distance holder (400) using a second snap-fit connection.
2. Refrigeration device according to claim 1, characterised in that the distance holder (400) is embodied as a strip.
3. Refrigeration device according to claim 1 or 2, characterised in that the snap-fit device (400, 500) has a base plate (510) supported on the wall (120) of the container for refrigerated products (110) and two limbs (520) which protrude from the base plate (510).
4. Refrigeration device according to claim 3, characterised in that catch tappets (530) which are embodied to hold the tube evaporator (200) in a locking manner are provided on the interior of the limbs (520).
5. Refrigeration device according to claim 3 or 4, characterised in that catch tappets (540) which are embodied to hold the distance holder (400) in a locking manner are provided on the exterior of the limbs (520).
6. Refrigeration device according to one of the preceding claims, characterised in that the wall (120) is a ceiling wall of the container for refrigerated products (110).
7. Refrigeration device according to one of the preceding claims, characterised in that the snap-fit device (400, 500) is arranged in the front area of the container for refrigerated products (110).
8. Method for producing a refrigeration device, having a container for refrigerated products (110) with a wall (120), and a tube evaporator (200) arranged in the container for refrigerated products (110),
   comprising the following steps:

   - fastening the tube evaporator (200) by means of a snap-fit devices (400, 500) to the wall (120) of the container for refrigerated products (110), wherein the snap-fit device (400, 500) has at least one clip (500) and a distance holder (400), so that the tube evaporator (200) is fastened to the wall (120) of the container for refrigerated products (110) by means of the clip (500),

   - surrounding the container for refrigerated products (110) with foam with a heat-insulating material,

   characterised by the following steps

   - after surrounding with foam, releasing the tube evaporator (200) from the clip (500);

   - fastening the tube evaporator (200) to the distance holder (400); and

   - fastening the distance holder (400) to the clip (500).
9. Method according to claim 8, characterised in that the tube evaporator (200) rests tightly against the wall (120) while being surrounded with foam.
10. Method according to one of claims 8 or 9, characterised in that the wall is a ceiling wall of the container for refrigerated products (110).

Images