EP3361177B1 - Device for generating heat - Google Patents

Description

The present invention relates to a device for generating heat.

Corresponding devices are used, for example, as part of heating systems, in particular as part of building heating systems, in which a fluid is heated and circulated to form a radiator. The heating of the fluid is usually carried out by burning oil, gas, pellets or other energy sources.

Furthermore, heating systems are known which are operated by means of electrical current, geothermal energy or district heating. There are also devices in which water is heated by means of electromagnetic induction. This is done, for example, on the documents GB 2 339 377 A , US 5,914,065 A , US2013 062340 A1 and DE 10 2013 000 271 A1 referred.

The problem with the known devices is that they are complex to construct. Furthermore, in times of the energy turnaround, scarce raw materials and steadily increasing pollution, there is a need for facilities that are more efficient and cause as little emissions as possible.

The present invention is therefore based on the object of specifying a device for generating heat, in which efficient heat generation can be achieved using structurally simple means.

The above object is solved by the features of claim 1. According to this, a device for generating heat is specified, with a shaft rotatably arranged within an enclosure, at least one magnet being arranged on the shaft, so that the enclosure can be heated at least in regions due to the magnet rotating with the shaft by means of magnetic interaction and the enclosure having at least one flow path to heat a fluid carried in that flow path.

In the manner according to the invention, it has been recognized that the underlying object can be achieved in that an enclosure can be heated by at least one magnet arranged on a, preferably linear, shaft. The magnetic field generated by the moving magnet causes eddy currents within the enclosure, which heat the enclosure. In a further manner according to the invention, it has been recognized that the device can be implemented very easily if the shaft is arranged within the enclosure and the enclosure has at least one flow path in which the fluid is guided. The flow path can, for example, run along the outside of the casing, so that the fluid flows on the outside of the casing.

With a view to maximizing the efficiency of the device, the enclosure according to the invention consists at least in regions of an aluminum-magnesium-silicon alloy (AlMgSi) - for example AlMgSiO, 5 F22, sold under the material number 32315. A simple and reliable construction can be specified are when the enclosure is made entirely of metal, in particular an aluminum alloy, preferably an aluminum-magnesium-silicon alloy.

The device according to the invention can be part of a heating system, for example a building heating system, but is not restricted to this exemplary embodiment. In general, the device according to the invention can be used when a fluid is on efficient, i.e. environmentally friendly and resource-saving way to be heated. Furthermore, it is essential that several magnets can be arranged on the shaft, preferably equidistant from one another. For the sake of simplicity, only one magnet is spoken of in the following, with several magnets also being part of the disclosure.

The border can advantageously be cylindrical. The border can thus be arranged in a particularly simple manner around the shaft and the magnet arranged thereon and can be heated by means of magnetic interaction or inductive heating.

In a particularly advantageous manner, the flow path can be implemented through at least one channel formed on the outside of the enclosure. For example, the channel can be milled out of the base body of the enclosure, turned out, etc. Specifically, the channel can be a thread-like groove in which the fluid is guided. This makes it possible to keep the fluid in contact with the casing over an extremely long distance and thus for a long period of time, so that the fluid can be strongly heated if necessary.

According to a preferred embodiment, the groove can have a pitch of 11 mm to 30 mm, in particular of 18 mm to 23 mm, preferably of 21 mm. Alternatively or additionally, the depth of the groove can be 20 mm to 40 mm, in particular 25 mm to 35 mm, preferably 30 mm. In a further advantageous manner, the groove can have a width of 10 mm to 14 mm, in particular of 11 mm to 13 mm, preferably of 12 mm.

With regard to the realization of the flow path, the border can be double-walled, so that at least one ring channel is realized. It is expressly pointed out that such an embodiment can be combined with the embodiment according to which the border has a channel on its outside as a flow path. Depending on the area of application, the fluid can be guided exclusively in the ring channel or exclusively in the outer channel or in both channels, for example via a suitable valve device.

In order to influence the flow path of the fluid, at least one guide rib can be formed in the ring channel. For example, one or more guide ribs can be designed in such a way that the fluid flows through the ring channel as evenly as possible, so that a uniform heat emission from the enclosure to the fluid is made possible. For this purpose, the guide rib can run in the circumferential direction and / or in the axial direction of the border or obliquely on the border. Any combination of guide ribs is conceivable.

A particularly effective generation of heat is possible in that the shaft can be driven or driven by a drive, in particular an electric motor, at 2,500 revolutions per minute (rpm), preferably at 4,500 rpm to 5,000 rpm. A corresponding method forms part of the disclosure described here.

The magnet or magnets can advantageously have a magnetization quality of N42SH and / or a holding force of 26 Newtons. Furthermore, if several magnets are arranged, they have different properties or characteristic numbers, for example holding force, magnetization, size, etc. The magnet or magnets can be detachably attached to the shaft, in particular on a corresponding carrier device or Holding device can be clipped on, for example. With such a construction, the number and spatial arrangement of the magnets can be adjusted very easily. Furthermore, magnets with different key figures - depending on requirements - can be arranged on the shaft.

In order to achieve a high effectiveness of the device, the radial distance between the magnet and the enclosure can be 2 mm to 6 mm, in particular 3 mm to 5 mm, preferably 4 mm. The radial distance is the distance between the opposing surfaces of the magnet and the frame.

Furthermore, it is conceivable that the border is arranged within a housing. If a channel or channels are formed on the outside of the enclosure, these can be closed off from the housing, for example, when viewed in the radial direction of the enclosure. The housing can at least partially comprise a heat insulating material. It is also conceivable that a further component is formed between the casing and the housing, for example insulation, which radially closes any flow path on the outside of the casing.

According to an alternative or additional embodiment, an additional component, for example a tube, in particular made of a metal or plastic, can be provided between the shaft and the casing. Leakage protection is thereby realized, so that the fluid can flow safely in the device. The fluid can be water, for example.

Fig. 1

in einer schematischen, teilweise geschnittenen Seitenansicht ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung,

Fig. 2

in einer schematischen, geschnittenen Draufsicht das Ausführungsbeispiel gemäß Fig. 1,

Fig. 3

in einer schematischen, teilweise geschnittenen Seitenansicht das Ausführungsbeispiel gemäß Fig. 1,

Fig. 4

in einer schematischen, teilweise geschnittenen perspektivischen Ansicht ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung,

Fig. 5

in einer schematischen, perspektivischen Darstellung ein Ausführungsbeispiel einer Einfassung einer erfindungsgemäßen Vorrichtung,

Fig. 6

in einer schematischen, geschnittenen Seitenansicht die Einfassung gemäß Fig. 5,

Fig. 7

in einer schematischen Seitenansicht die Einfassung gemäß Fig. 5, und

Fig. 8

in einer schematischen, geschnittenen Darstellung ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung.

There are various possibilities for advantageously developing and developing the teaching of the present invention. For this purpose, reference should be made on the one hand to the claims subordinate to claim 1 and on the other hand to the following explanation of preferred exemplary embodiments of the invention with reference to the drawing. In connection with the explanation of the preferred exemplary embodiments of the invention with reference to the drawing, generally preferred refinements and developments of the teaching are also explained. Show in the drawing

Fig. 1

a schematic, partially sectioned side view of an embodiment of a device according to the invention,

Fig. 2

in a schematic, sectional top view of the embodiment according to Fig. 1 ,

Fig. 3

in a schematic, partially sectioned side view of the embodiment according to Fig. 1 ,

Fig. 4

a schematic, partially sectioned perspective view of a further embodiment of a device according to the invention,

Fig. 5

a schematic, perspective representation of an embodiment of a frame of a device according to the invention,

Fig. 6

in a schematic, sectional side view of the edging according to Fig. 5 ,

Fig. 7

in a schematic side view of the border Fig. 5 , and

Fig. 8

in a schematic, sectional representation of an embodiment of a device according to the invention.

The 1 to 3 show in different, schematic representations an embodiment of a device according to the invention. The device has a shaft 1 with magnets 2 arranged thereon, in particular permanent magnets. The magnets 2 can be detachably arranged in carrier units, not shown, so that the number and / or type and / or arrangement of the magnets 2 can be varied. To simplify the illustration, the magnets 2 in Fig. 2 Not shown.

The shaft 1 can be rotated via a drive 3, for example an electric motor, so that the casing 4 arranged around the shaft 1 can be heated by electromagnetic induction. The enclosure 4 is double-walled, so that an annular channel 6 is realized, which serves as a flow path 5 for a fluid, for example water. The rotational movement of the magnets 2 arranged on the shaft 1 heats the enclosure 4 by means of magnetic interaction, which in turn heats the fluid flowing in the annular channel 6.

In order to adapt the flow of the fluid, one or more guide ribs can be formed in the ring channel 6. The flow path 5 can thus be adapted such that the fluid comes into contact with the casing 4 as uniformly as possible and has an optimal length. In a particularly advantageous manner, the radial distance 7 between the magnet 2 and the casing 4 can be in the range from 2 mm to 6 mm, in particular from 3 mm to 5 mm. A particularly high efficiency can be achieved at a radial distance 7 of 4 mm. The border 4 can be made of an aluminum alloy consist of an AlMgSi alloy. As an alternative or in addition, the shaft 1 can be driven by the drive 3 at more than 2,500 rpm, preferably at 4,500 rpm to 5,000 rpm.

The embodiment according to Fig. 4 differs from the embodiment of the 1 to 3 through the design of the flow path 5. This also runs within the enclosure 4, so that this can be viewed at least in the broadest sense as double-walled. The flow path 5 is helical or spiral. It is thereby achieved in a particularly simple manner that the largest possible area of the enclosure 4 comes into contact with the fluid so that good heat transfer takes place. In Fig. 4 In addition, the inlet 8 and the outlet 9 are shown, via which the fluid is supplied to and removed from the device.

Furthermore corresponds to Fig. 4 that in the embodiment according to the 1 to 3 , so that reference is made to the relevant description for avoiding repetitions.

The 5 to 7 show an embodiment of an enclosure 4 of a device according to the invention. The border 4 is cylindrical and has a channel 10 on its outside, which serves as a flow path 5. The channel 10 is designed as a groove 11, which runs like a thread around the outside of the casing 4. The border is made in a particularly advantageous manner from an aluminum alloy, in particular from an AlMgSi alloy.

The groove can have a width 12 from 10 mm to 14, in particular from 11 mm to 13 mm, preferably from 12 mm, and / or a depth 13 from 20 mm to 40 mm, in particular from 25 mm to 35 mm, preferably from 30 mm , and / or have a slope 14 of 11 mm to 30 mm, in particular of 18 mm to 23 mm, preferably of 21 mm. The border 4 can have a length 15 of 250 mm to 350 mm, in particular 275 mm to 325 mm, preferably 300 mm have and / or have an outer diameter of 180 mm to 220 mm, in particular from 190 mm to 210 mm, preferably of 200 mm. According to a specific exemplary embodiment, the border 4 has a length 15 of 300 mm, an outer diameter of 200 mm and the groove 11 has a depth 13 of 30 mm, a width 12 of 12 mm and a pitch 14 of 21 mm.

At this point it should be pointed out again that the bezel 4 is also a combination of the in the 1 to 7 Embodiments shown can be realized, namely the flow path 5 through an annular channel 5 according to the 1 to 3 and / or through a helical flow path 5 according to FIG Fig. 4 and / or through a groove 11 according to the 5 to 7 be trained. The flow path 5 can, in the axial direction of the enclosure, be designed differently in different regions of the enclosure.

Fig. 8 shows a further embodiment of a device according to the invention comprising a shaft 1 with magnets 2 attached to it. The shaft 1 is arranged within an enclosure 4. In the exemplary embodiment shown, the radial distance 7 between the magnets 2 and the casing 4 has a length of 4 mm, since the inner diameter of the casing is 101.6 mm and the outer diameter of the shaft 1 with magnets arranged thereon is 97.6 mm. This is a preferred dimensioning, but the embodiment is not necessarily limited to these lengths.

Out Fig. 8 it can also be seen that the casing 4 is arranged in a housing 16. The housing 16 may be at least partially made of a heat insulating material to increase the efficiency of the device. Such a housing 16 can also in the in 1 to 4 shown devices are provided and is accordingly advantageous.

With regard to the further description of the figures, reference is made to the explanations relating to FIGS 1 to 7 referred. It is essential that at the in the Fig. 8 device shown also in the 5 to 7 edging 4 shown can be arranged.

With regard to further advantageous embodiments of the device according to the invention, reference is made to the general part of the description and to the appended claims in order to avoid repetition.

Finally, it should be expressly pointed out that the above-described exemplary embodiments of the device according to the invention only serve to discuss the claimed teaching, but do not restrict it to the exemplary embodiments.

Reference list

1

wave

2nd

magnet

3rd

drive

4th

Edging

5

Flow path

6

Ring channel

7

distance

8th

Intake

9

procedure

10th

channel

11

Groove

12th

width

13

depth

14

pitch

15

length

16

casing

Claims (15)

1. Device for generating heat, having a shaft (1) which is rotatably arranged within a surround (4), wherein at least one magnet (2) is arranged on the shaft (1) so that the surround (4) as a result of the magnet (2) which rotates with the shaft (1) can be heated at least in regions by means of magnetic interaction and wherein the surround (4) has at least one flow path (5) in order to heat a fluid which is guided in this flow path (5),
   characterised in that the surround (4) comprises at least in regions an aluminium/magnesium/silicon alloy (AlMgSi).
2. Device according to claim 1, characterised in that the surround (4) is constructed in a cylindrical manner.
3. Device according to claim 1 or claim 2, characterised in that the flow path (5) is constructed by means of at least one channel (10) formed on the outer side of the surround (4).
4. Device according to claim 3, characterised in that the channel (10) is constructed as a thread-like groove (11).
5. Device according to claim 4, characterised in that the groove (11) has a pitch (14) of from 11 mm to 30 mm, in particular from 18 mm to 23 mm, preferably of 21 mm.
6. Device according to claim 4 or claim 5, characterised in that the groove (11) has a depth (13) of from 20 mm to 40 mm, in particular of from 25 mm to 35 mm, preferably of 30 mm.
7. Device according to any one of claims 4 to 6, characterised in that the groove (11) has a width (12) of from 10 mm to 14 mm, in particular of from 11 mm to 13 mm, preferably of 12 mm.
8. Device according to any one of claims 1 to 7, characterised in that the surround (4) is constructed with double walls so that at least one annular channel (6) is constructed as a flow path (5).
9. Device according to claim 8, characterised in that at least one guiding rib is formed in the annular channel (6).
10. Device according to claim 9, characterised in that the guiding rib extends in a peripheral direction and/or in an axial direction of the surround (4).
11. Device according to any one of claims 1 to 9, characterised in that the surround (4) generally comprises metal, in particular an aluminium alloy, preferably an aluminium/magnesium/silicon alloy (AlMgSi).
12. Device according to any one of claims 1 to 11, characterised in that the shaft (1) can be driven by means of a drive (3), in particular an electric motor, at at least 2,500 rpm, preferably at from 4,500 rpm to 5,000 rpm.
13. Device according to any one of claims 1 to 12, characterised in that the magnet (2) or the magnets (2) has/have a magnetisation grade of N42SH and/or a retention force of 26 Newton.
14. Device according to any one of claims 1 to 13, characterised in that the radial spacing (7) between the magnet (2) and the surround (4) is from 2 mm to 6 mm, in particular from 3 mm, to 5 mm, preferably 4 mm.
15. Device according to any one of claims 1 to 14, characterised in that the surround (4) is arranged inside a housing (16).

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