DE102007023766A1 - Partially filling an arrangement having storage elements of heat accumulator with salt melt, comprises heating storage medium at its melting point and then sucking over pressure difference between interior of accumulator and arrangement - Google Patents

Abstract

The method for partially filling an arrangement having storage elements (17) of a heat accumulator with a salt melt (10), comprises heating a storage medium at its melting point and then sucking over a pressure difference between the interior of the accumulator and the interior of the arrangement in each storage element, seizing the temperature of the storage medium over a first and a second temperature sensor (9), and adjusting a unit of a controller or a regulator in dependence of the output data of the temperature sensors over first and second heating devices. The method for partially filling an arrangement having storage elements (17) of a heat accumulator with a salt melt (10), comprises heating a storage medium at its melting point and then sucking over a pressure difference between the interior of the accumulator and the interior of the arrangement in each storage element, seizing the temperature of the storage medium over a first and a second temperature sensor (9), and adjusting a unit of a controller or a regulator in dependence of the output data of the temperature sensors over first and second heating devices. The heat accumulator has the liquid storage medium to store heat and is used in a cooking device. The temperature of the storage medium is kept at 580[deg] C during the filling process. The liquid storage medium is led over a first fluid line (11) against the force of gravity in the arrangement and is led over a second fluid line (13) against the force of gravity from the arrangement to terminate the filling process by solidifying the liquid storage medium. The storage medium is solidified by cooling through inter-connection of the controller or regulator. A negative pressure is occasionally set on to the arrangement over a third fluid line for the adjustment of the pressure difference by inter-connecting the controller or regulator. The third fluid line is formed with the second fluid line. The storage elements are filled with the storage medium one after the other. The first storage element is connected with the first fluid line and the last storage element is connected with the second fluid line. Each of the storage elements is connected between the first and the last storage element over an over-flow fluid line with two adjacent storage elements. An open end in the storage element opens the end of the first fluid line, second fluid line and/or over-flow fluid line, and determines the filling height in the storage element with the storage medium. The filling height is equally selected in each storage element. An inner diameter of the first fluid line, the second fluid line and/or the over-flow fluid line is selected in dependent upon the filling height of the storage element. The first and/or the second fluid line are partially interrupted, separated or destroyed above the solidified storage medium after ending of the filling process. The interior of the accumulator is opened for atmosphere. The pressure difference (delta p) between the interior of the accumulator and the interior arrangement is larger than the hydrostatic pressure. All the storage elements are equal height and the melt consists of the liquid storage medium. An independent claim is included for a device for partially filling an arrangement.

Description

The Invention relates to a method for filling an arrangement, comprising at least one storage element of a heat accumulator, especially for use in a cooking appliance, with a liquefiable storage medium for storage of Heat, as well as a device for carrying such a procedure.

Heat storage are well known in the prior art, even for use in cooking appliances, see, for. B. EP 1 092 115 B1 , It is exploited, inter alia, that when melting a substance heat is consumed, which, as long as the liquid state persists, is stored latent. This latent heat is released when the substance solidifies.

In the not pre-published DE 10 2006 048 798.2 a cooking appliance is described with a heat storage in which the heat accumulator comprises a substantially eutectic mixture of Li ₂ CO ₃ and Na ₂ CO ₃ .

In front Commissioning of a heat storage must be the same be filled with in any case a storage medium. For filling eg. With a salt have been so far mostly manual techniques, such as a ladle used in conjunction with a funnel. The disadvantage of this is the elaborate manual filling. In addition leads an imprecise manual filling to salt losses and for contact of the salt with the outer surface the heat storage. When filling the heat accumulator with liquid, hot molten salt Continue handling hot parts and salt vapor in complicate the filling of the atmosphere and moreover pose a danger to humans.

Of the Invention is therefore based on the object, the generic Process in such a way that the disadvantages of the prior art are overcome in order to reduce the Time and an increase in quality as well to achieve reliability during filling.

These The object is achieved by the invention solved that the storage medium in a reservoir heated to at least its melting point and then over a pressure difference between the interior of the reservoir and the Inside the assembly sucked into each storage element of the assembly becomes.

It is preferred that the storage medium from a, preferably eutectic, mixture of Li ₂ CO ₃ and Na ₂ CO _{3 is} produced.

Further can be provided that the temperature of the storage medium during a filling process above 500 ° C, especially at about 580 ° C, is maintained.

With The invention also proposes that the temperature the storage medium in the reservoir via at least a first Temperature sensor detected and depending from output data of the first temperature sensor via a first heating device, preferably by means of a control or Control device is set.

Further can be provided that the temperature of the storage medium in the arrangement via at least one second temperature sensor detected and depending on output data of the second temperature sensor via a second heating device, preferably is adjusted by means of the control or regulating device.

embodiments of the method according to the invention are characterized characterized in that liquid storage medium the reservoir via at least one first fluid line, in particular against gravity, in the arrangement and over at least one second fluid line, in particular against gravity, from the Arrangement for terminating a filling process by solidification the liquid storage medium is performed.

there can be provided that the storage medium by cooling solidified, preferably with the interposition of the tax or control device.

Prefers is according to the invention that over at least a third fluid line for adjusting the pressure difference Vacuum is at least temporarily applied to the arrangement, preferably with the interposition of the control or regulating device, wherein the third fluid conduit preferably in one with the second fluid conduit is formed.

Further can be provided that an arrangement of a plurality of memory elements is constructed, wherein the memory elements successively with storage medium be filled by preferably a first storage element with the first fluid line and a last memory element with be connected to the second fluid line.

there may in turn be provided that in the case where more than two memory elements are connected to form an array, each memory element between the first memory element and the last memory element via at least one overflow fluid line is connected to two adjacent memory elements.

Furthermore, it is proposed according to the invention gene, that an opening into a memory element, open end of the first fluid line, the second fluid line and / or at least one overflow fluid line determines the filling level in the storage element with storage medium, preferably wherein the filling height is chosen to be the same in each storage element of an array.

Prefers is according to the invention further that the Inner diameter of the first fluid line, the second fluid line and / or each overflow fluid line in dependence from the filling volume, in particular the height of the respective memory element is selected.

According to the invention, it may also be provided that the pressure difference Δp between the interior of the reservoir, which is preferably open to the atmosphere, and the interior of the arrangement is greater than the hydrostatic pressure which the liquid storage medium generates in the first fluid line is preferably greater than the hydrostatic pressure that the liquid storage medium generates until reaching the second fluid conduit is most preferably selected as follows: Δp ≥ ρ melt ·Number storage elements ·Height storage elements . especially Δp ≥ ρ melt ·Number storage elements ·Height storage elements · 2, wherein all memory elements are the same height and the melt consists of the liquid storage medium.

Further is proposed with the invention that after finishing a filling operation, the first and / or second fluid line is at least partially removed, preferably above the solidified Storage medium aborted, severed or destroyed becomes.

With The invention also provides an apparatus for performing of a method according to the invention, which is characterized by a cup comprising the reservoir, which at least partially filled with the storage medium is located in a melting and filling furnace and there can be heated by a first heating device; and an arrangement with at least one storage element, at least one first fluid line, at a first end in liquid storage medium in the crucible and at a second end in a storage element can be arranged is, and at least a second fluid line, at a first End can be arranged in a memory element and at a second end with a cooling device and / or a device for generating A negative pressure is connectable.

there can be provided that each memory element above the filling level of the crucible with storage medium for filling arranged with storage medium and / or an elongated shape, preferably in the form of a cylinder, preferably all have the same shape in a plurality of memory elements.

With the invention is also proposed that the crucible over at least one Isolierfuß in the melting and filling furnace is arranged; and / or the melting and filling furnace with a lid is closed, preferably a Gap for the second fluid line remains free, and / or stands on at least one insulating foot; and / or the cooling device a water cooling section of the second fluid line, in particular outside the melting and filling furnace, comprising; and / or the device for generating a negative pressure comprises a water jet pump.

Prefers is according to the invention, that the arrangement a plurality of memory elements, wherein a first memory element with the first fluid line and an overflow fluid line, the last storage element with the second fluid line and an overflow fluid line and intermediate storage elements each with two overflow fluid lines connected in series.

Further can be provided that the inner diameter of the first Fluid line, the inner diameter of the second fluid line and the inner diameter of each overflow fluid line is constant and depending on the height the respective memory element is selected, preferably between 3 and 7 mm, most preferably about 4 mm.

According to the invention, it is preferred that the pressure difference Δp between the interior of the crucible, which is preferably open to atmospheric pressure, and the interior of the arrangement is calculated as follows Δp ≥ ρ melt ·Number storage elements ·Height storage elements . especially Δp ≥ ρ melt ·Number storage elements ·Height storage elements · 2, wherein all memory elements are the same height and the melt consists of the liquid storage medium.

The invention also proposes that a second heating device can be brought into operative connection with each storage element, wherein preferably the second heating device has a plurality of heating wires, which extend from the first storage element in a series circuit to the last storage element and are connectable via two terminals, namely from the first storage element and the last storage element, with a control or regulating device.

Furthermore, it can also be provided that at least a first temperature sensor detects the temperature of the storage medium in the crucible and is connectable to the first heater and the control or regulating device, and / or at least a second temperature sensor comprises the temperature of the storage medium in the arrangement and with the second heating device ( 3 - 3 ⁱⁱⁱ ) and the control and / or regulating device is connectable.

With the invention is further proposed that the arrangement can be installed in a cooking appliance or with a cooking appliance is connectable, preferably the second temperature sensor and the second heater with another control or regulating device the cooking appliance connectable; and / or the part of the first Fluid line and the part of the second fluid line, each over the respective storage element, in particular on the filling level of the respective storage element with storage medium, extending out, is separable.

After all can also be provided according to the invention, that the Height of the second end of the first fluid line, the height the first end of the second fluid line and the height each end of each overflow fluid line with the Level of the respective memory element matches.

Accordingly allows the inventive method for the first time a simple and automated filling of memory elements of a Heat storage with, for example, a molten salt by generation a pressure difference between a reservoir of molten salt and the interior of an array of memory elements. Here is the Filling amount of molten salt in the storage elements the height of the outlet openings of fluid line metered and a filling process by solidification of the molten salt ended in a cooling section, which is why no further Measures and closing organs to complete the filling needed.

There a flow of molten salt due to pressure differences in a quasi closed system, the need remains salt handling by humans. Also, no salt can get to the surface of the storage elements, and it there are no salt losses. Due to the intrinsic safety of the invention Process automation is easy to implement. Because of the filling process in a closed container takes place, moreover Handling of hot parts and the escape of salt vapor in avoided the atmosphere.

Further Features and advantages of the invention will become apparent from the following Description in which a method according to the invention and a device according to the invention with reference to schematic drawings exemplified. Showing:

1.a. a sectional view of a melting and filling furnace according to the invention for heating a molten salt and for filling storage elements of a heat accumulator with the molten salt according to a method of the invention;

1.b an enlarged section 1.a. showing the arrangement of storage elements of a heat accumulator, which are connected by overflow fluid lines, and an electric heater;

2 a sectional view of an overflow nipple for providing an overflow fluid line between two storage elements, as shown in the 1.a. and 1.b are shown; and

3 a partial perspective view of an arrangement of six according to the invention with storage medium filled storage elements of a heat storage, which are interconnected via overflow sheets, and an electric heater for installation in a cooking appliance.

In 1.a. is a melting and filling furnace 8th for filling three memory elements 17 to see a heat storage, with a lid 2 Can be covered and insulated feet 12 having. Each storage element 17 is cylindrical in shape; the longitudinal axes of the cylinders of the storage elements 17 run parallel; and the memory elements 17 extend along their respective longitudinal axis in the height. Inside the melting and filling furnace 8th is also a via a heater 18 heatable crucible 1 , the liquefiable storage medium in the form of a salt mixture or a molten salt 10 can absorb and on insulating feet 19 stands. By heating the crucible 1 over the heater 18 can, more precisely, the salt mixture, which may consist in particular of a eutectic mixture of Li ₂ CO ₃ and Na ₂ CO ₃ , are melted, so that in the crucible 1 the molten salt 10 forms.

The molten salt 10 should during a filling process of the memory elements 17 preferably have a temperature of about 580 ° C. The Temperature of the molten salt 10 in the crucible 1 can through a temperature sensor 9 in particular comprising a thermocouple, and by means of a temperature monitoring device 7 monitored and over the heater 18 be set. The three memory elements to be filled 17 are located during the filling process inside the melting and filling furnace 8th , especially within the crucible 1 but above the molten salt 10 , Through a first fluid line 11 is the arrangement of the memory elements 17 with the molten salt 10 connected, wherein a first end of the first fluid conduit 11 in the molten salt 10 dips. Via a second fluid line 13 can the arrangement of memory elements 17 be connected to a pump to the negative pressure, which extends through the mouths of the first fluid line 11 in the molten salt 10 in the second fluid line 13 builds up and creates a suction effect, can be specifically strengthened. Exemplary here is the pump as a water jet pump 5 trained, connected to a water connection 6 connected. The three memory elements 17 are serial by two in the 1.a. Not shown overflow fluid lines connected to each other, so that in particular by the pump 5 produced negative pressure the molten salt 10 over the first fluid line 11 in the arrangement of the memory elements 17 draws. The overflow fluid lines will be described with reference to FIG 1.b discussed in detail later.

By vacuum or a pressure difference so salt melt 10 over the first fluid line 11 in the arrangement of memory elements 17 sucked. After complete filling of the three memory elements 17 will excess molten salt 10 through the second fluid line 13 initially from the arrangement of memory elements 17 and then from the melting and filling furnace 8th led out. Outside the melting and filling furnace 8th includes the second fluid line 13 a cooling section 4 , within which the molten salt 10 is cooled and solidifies, so that the filling process is terminated automatically.

A section X out 1.a. is exemplary in 1.b shown enlarged. In addition to the three memory elements to be filled 17 ⁱ . 17 ⁱⁱ . ^Iii are another electric heater 3 ⁱ , the first fluid line 11 ⁱ , the second fluid line 13 ⁱ and two overflow fluid lines 15 . 15 ⁱ , which are executed here as overflow connections or overflow nipples, to see in part. In the in 1.b In the embodiment shown, the desired filling state, that is to say the maximum filling level, of the storage elements 17 ⁱ . 17 ⁱⁱ . ^Iii achieved when the level of the molten salt within the respective storage element 17 ⁱ . 17 ⁱⁱ . ^Iii the mouth of the first fluid line 11 ⁱ the respective overflow fluid line 15 . 15 ⁱ or the second fluid line 13 ⁱ reached.

The in the 1.a. -d, 1.b The device according to the invention thus operates as follows:
At a sufficient negative pressure in the second fluid line 13 ⁱ becomes molten salt 10 through the first fluid line 11 ⁱ in the initially unfilled first memory element 17 ⁱ sucked. After reaching through the first overflow fluid line 15 fixed maximum filling height of the first storage element 17 ⁱ flows molten salt 10 through the overflow fluid line 15 in the second memory element 17 ⁱⁱ and finally from there, after reaching the maximum level at the level of the second overflow fluid line 15 ⁱ about the same in the third memory element ^Iii , After reaching the via the second fluid line 13 ⁱ certain maximum level of the third memory element ^Iii Excess molten salt flows into the second fluid line 13 ⁱ and finally solidifies inside the cooling section 4 , As a result, the filling process is terminated automatically, so that the melting and filling furnace 8th be turned off and the molten salt 10 in the memory elements 17 ⁱ . 17 ⁱⁱ . ^Iii can solidify into a storage medium. The so filled arrangement of memory elements 17 ⁱ . 17 ⁱⁱ . ^Iii can, after solidification of the molten salt, from the melting and filling furnace 8th taken out and optionally installed in a cooking appliance, not shown, where the second electric heater 3 ⁱ for heating the salt mixture within the storage elements 17 ⁱ . 17 ⁱⁱ . ^Iii can be used.

A filling temperature of preferably about 580 ° C to ensure that with slight cooling of the molten salt within the device according to the invention, a stagnation of the molten salt is prevented. Since the molten salt is very thin liquid, a small pressure difference is enough to suck it out of the crucible 1 in the memory elements 17 , More specifically, the pressure difference Δp can be calculated as follows: Δp = ρ melt ·Number storage elements ·Height storage elements · 2, where all memory elements 17 are equal.

The diameter of the fluid lines 11 ⁱ . 13 ⁱ . 15 . 15 ⁱ must be chosen such that occur during a meaningful filling no clogging due to impurities in the molten salt and the filling level of the storage elements 17 to ^Iii is reproducible. Here, for example, at the selected molten salt from a eutectic mixture of Li ₂ CO ₃ and Na ₂ CO ₃ at a filling temperature of about 580 ° C, an inner diameter of about 4 mm has been found suitable. However, if the length of the memory elements 17 to ^Iii due to the size of the cooking appliance, in which they are to be used later, is increased must Also, the inner diameter to be increased, for example, about 6 mm.

The temperature of the molten salt is, as already mentioned, on the electric heater 3 ⁱ in the memory elements 17 ⁱ to ^Iii adjustable, and also during the filling process, to prevent the melt from stalling.

In 2 is an overflow fluid line 15 ⁱⁱ in the form of an overflow nipple 15 ⁱⁱ shown. The overflow nipple is therefore directly between two in 2 not shown storage elements of a heat storage and its dimensions are chosen so that an optimal flow behavior of the molten salt is ensured. So he has, as already mentioned, an inner diameter of about 4 mm.

Another possible arrangement of memory elements 17 ^iv and 17 ^{v. Chr} a heat store is in 3 shown in perspective. In contrast to the embodiment according to the 1.a. and 1.b are the overflow fluid lines ^Iii . 15 ^iv here formed hose-like. Furthermore, in principle, two memory element arrangements, as they according to the 1.a. and 1.b be filled with molten salt, connected in series and arranged in parallel, wherein one of the overflow fluid lines 15 ^iv the connection between the two triplets of storage elements 17 ^iv and 17 ^{v. Chr} manufactures. The illustration shows one already completely with a solidified storage medium 10b filled arrangement of the six storage elements 17 ^iv and 17 ^{v. Chr} , with one in each case by the height of the overflow fluid lines ^Iii and 15 ^iv certain maximum filling height 10a , The electric heater 3 ⁱⁱ and 3 ⁱⁱⁱ To summarized heating wires 3 ⁱⁱ that have connections 3 ⁱⁱⁱ with a power source, not shown, and a control or regulating unit, not shown, preferably of the cooking appliance, in which the arrangement is to be installed, are connectable. This control unit is further with not shown temperature sensors in the in 3 shown left memory elements 17 ^iv via temperature sensor cables 20a and 20b connected. Finally, it should be noted that in the arrangement according to 3 in the 1.a. and 1.b shown first and second fluid line have been partially removed and although they are from the storage medium 10b extend out so that only one end 11a respectively. 13a the respective fluid lines can be seen.

The in the foregoing description and drawings Features of the invention can be used individually as well as in any combination for the realization of the Invention in their various embodiments essential be.

1

melting pot

2

cover of the melting and filling furnace

3, 3 ⁱ , 3 ⁱⁱ , 3 ⁱⁱⁱ

electrical heater

4

cooling section within the second fluid line

5

Water jet pump for generating a negative pressure

6

mains water supply

7

contraption for temperature monitoring of the molten salt

8th

melting and filling oven

9

temperature sensor in the molten salt in the crucible

10

molten salt

10a

Storage medium filling height

10b

storage medium

11, 11 ⁱ

first fluid line

11a

The End the first fluid line

12

Insulating feet of the melting and filling furnace

13, 13 ⁱ

second fluid line

13a

The End the second fluid line

15-15 ^iv

Overflow fluid line between the individual storage elements

17-17 ^BC

storage elements a heat storage

18

heater

19

Insulating feet of the crucible

20a, 20b

Temperature sensor cable

X

neckline from an array of storage elements and fluid lines

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1092115 B1 [0002]
• - DE 102006048798 [0003]

Claims (24)

Method for at least partially filling a Arrangement comprising at least one storage element of a heat accumulator, especially for use in a cooking appliance, with a liquefiable storage medium for storage of heat, with the storage medium in a reservoir at least its melting point heated and then over a Pressure difference between the interior of the reservoir and the interior the arrangement is sucked into each storage element of the arrangement. Process according to Claim 1, characterized in that the storage medium is produced from a preferably eutectic mixture of Li ₂ CO ₃ and Na ₂ CO ₃ . Method according to claim 1 or 2, characterized that the temperature of the storage medium during a filling operation above 500 ° C, in particular at about 580 ° C, is maintained. Method according to one of the preceding claims, characterized in that the temperature of the storage medium in the reservoir via at least a first temperature sensor detected and depending on output data of the first temperature sensor via a first heating device, preferably adjusted by means of a control or regulating device becomes. Method according to one of the preceding claims, characterized in that the temperature of the storage medium in the arrangement via at least one second temperature sensor detected and depending on output data of the second temperature sensor via a second heating device, preferably adjusted by means of the control or regulating device becomes. Method according to one of the preceding claims, characterized in that the liquid storage medium from the reservoir via at least one first fluid line, especially against gravity, in the arrangement and over at least one second fluid line, in particular against gravity, from the arrangement for completing a filling by Solidification of the liquid storage medium out becomes. Method according to Claim 6, characterized that the storage medium solidifies by cooling is, preferably with the interposition of the control or regulating device. Method according to one of the preceding claims, characterized in that over at least one third fluid line for adjusting the pressure difference a negative pressure at least temporarily applied to the arrangement, preferably with the interposition of the control or regulating device, wherein the third fluid conduit preferably in one with the second fluid conduit is formed. Method according to one of the preceding claims, characterized in that an arrangement of several Memory elements is constructed, wherein the memory elements in succession be filled with storage medium, preferably by a first storage element with the first fluid line and a last Memory element to be connected to the second fluid line. Method according to claim 9, characterized in that that in the case where more than two storage elements be connected to an array, each memory element between the first memory element and the last memory element via at least one overflow fluid line with two adjacent ones Memory elements is connected. Method according to one of claims 6 to 10, characterized in that a in a memory element opening, open end of the first fluid line, the second Fluid line and / or at least one overflow fluid line the filling level in the storage element with storage medium determined, wherein preferably the filling level in each Memory element of an arrangement is the same. Method according to one of claims 6 to 11, characterized in that the inner diameter of the first Fluid line, the second fluid line and / or each overflow fluid line depending on the filling volume, in particular the height of the respective memory element is selected. Method according to one of the preceding claims, characterized in that the pressure difference Δp between the interior of the reservoir, which is preferably open to the atmosphere, and the interior of the arrangement is greater than the hydrostatic pressure which the liquid storage medium generates in the first fluid line, preferably is greater than the hydrostatic pressure that the liquid storage medium generates until it reaches the second fluid line, most preferably selected as follows: Δp ≥ ρ melt ·Number storage elements ·Height storage elements . especially Δp ≥ ρ melt ·Number storage elements ·Height storage elements · 2, wherein all memory elements are the same height and the melt from the liquid storage medium consists. Method according to one of the preceding claims, characterized in that after completion of a filling process the first and / or second fluid line at least partially removed is aborted, preferably above the solidified storage medium, is severed or destroyed. Device for carrying out a method according to one of the preceding claims, characterized by a crucible comprising the reservoir ( 1 ), which is at least partially filled with the storage medium, in a melting and filling furnace ( 8th ) and there by means of a first heating device ( 18 ) is heated; and an arrangement with at least one memory element ( 17 - 17 ^{v. Chr} ), at least one first fluid line ( 11 . 11 ⁱ ), which at a first end in liquid storage medium ( 10 ) in the crucible and at a second end into a storage element ( 17 . 17 ⁱ ) can be arranged, and at least one second fluid line ( 13 . 13 ⁱ ), which at a first end into a memory element ( 17 . ^Iii ) and connectable at a second end with a cooling device and / or a device for generating a negative pressure. Device according to claim 15, characterized in that each memory element ( 17 - ^Iii ) above the filling level of the crucible ( 1 ) is arranged with storage medium for filling with storage medium and / or an elongated shape, preferably in the form of a cylinder, wherein preferably in a plurality of storage elements all have the same shape. Apparatus according to claim 15 or 16, characterized in that the crucible ( 1 ) via at least one insulating foot ( 19 ) in the melting and filling furnace ( 8th ) is arranged; and / or the melting and filling furnace with a lid ( 2 ) is closable, wherein preferably a gap for the second fluid line ( 13 ) remains free, and / or on at least one Isolierfuß ( 12 ) stands; and / or the cooling device a water cooling section ( 4 ) of the second fluid line ( 13 ), in particular outside the melting and filling furnace ( 8th ), and / or the device for generating a negative pressure, a water jet pump ( 5 ). Device according to one of claims 15 or 17, characterized in that the arrangement comprises a multiplicity of memory elements ( 17 - 17 ^{v. Chr} ), wherein a first memory element ( 17 ⁱ ) with the first fluid line ( 11 ⁱ ) and an overflow fluid line ( 15 . ^Iii ), the last memory element ( ^Iii ) with the second fluid line ( 13 ⁱ ) and an overflow fluid line ( 15 . ^Iii ) and interposed memory elements ( 17 ⁱⁱ ) each with two overflow fluid lines ( 15 . 15 ⁱ . ^Iii . 15 ^iv ) are connected in series. Device according to one of claims 15 to 18, characterized in that the inner diameter of the first fluid line ( 11 . 11 ⁱ ), the inner diameter of the second fluid line ( 13 . 13 ⁱ ) and the inner diameter of each overflow fluid line ( 15 . 15 ⁱ ) is constant and is selected depending on the height of the respective storage element, preferably between 3 and 7 mm, most preferably about 4 mm. Device according to one of Claims 15 to 19, characterized in that the pressure difference Δp between the interior of the crucible ( 1 ), which is preferably open to atmospheric pressure, and the interior of the assembly is calculated as follows Δp ≥ ρ melt ·Number storage elements ·Height storage elements . especially Δp ≥ ρ melt ·Number storage elements ·Height storage elements · 2, where all memory elements ( 17 - 17 ^{v. Chr} ) are the same height and the melt from the liquid storage medium ( 10 ) consists. Device according to one of claims 15 to 20, characterized in that a second heating device ( 3 - 3 ⁱⁱⁱ ) with each memory element ( 17 - 17 ^{v. Chr} ), wherein preferably the second heating device a plurality of heating wires ( 3 ⁱⁱ ) extending from the first memory element in a series connection to the last memory element and via two terminals ( 3 ⁱⁱⁱ ), namely of the first memory element and the last memory element, are connectable to a control or regulating device. Device according to one of claims 15 to 21, characterized in that at least one first temperature sensor ( 9 ) the temperature of the storage medium in the crucible ( 1 ) and with the first heating device ( 18 ) and the control or regulating device is connectable, and / or at least a second temperature sensor comprises the temperature of the storage medium in the arrangement and with the second heating device ( 3 - 3 ⁱⁱⁱ ) and the control and / or regulating device is connectable. Device according to one of claims 15 to 22, characterized in that the arrangement can be installed in a cooking appliance or can be connected to a cooking appliance, wherein preferably the second temperature sensor and the second heating device ( 3 - 3 ⁱⁱⁱ ) connectable to a further control or regulating device of the cooking appliance; and / or the part of the first fluid line and the part of the second fluid line, which in each case extends beyond the respective storage element, in particular via the filling level of the respective storage element with storage medium, is separable. Device according to one of claims 15 to 23, characterized in that the height of the second end of the first fluid line ( 11 . 11 ⁱ ), the height of the first end of the second fluid line ( 13 . 13 ⁱ ) and the height of each end of each overflow fluid line ( 15 - 15 ^iv ) with the filling level of the respective storage element ( 17 - 17 ^{v. Chr} ) matches.