EP3361177A1 - Device for generating heat - Google Patents

Abstract

A device for generating heat, comprising a shaft (1) rotatably mounted inside a skirt (4), wherein at least one magnet (2) is arranged on the shaft (1), so that the skirt (4) is in contact with the shaft Shaft (1) rotating magnet (2) by means of magnetic interaction at least partially heated and wherein the enclosure (4) has at least one flow path (5) to heat a in this flow path (5) guided fluid.

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 heaters, in which a fluid is heated and circulated to a radiator. The heating of the fluid is usually carried out by the combustion of oil, gas, pellets or other energy sources.

Furthermore, heating systems are known, which are operated by means of electric power, geothermal or district heating. Furthermore, there are devices in which water is heated by means of electromagnetic induction. For this purpose, for example, on the documents GB 2 339 377 A . US 5 914 065 A and DE 10 2013 000 271 A1 directed.

In the known devices is problematic that they are complex in construction. Furthermore, in times of energy transition, scarce raw materials and steadily increasing environmental pollution, there is a need for facilities that have higher efficiency and as little emissions as possible.

The present invention is therefore based on the object to provide a device for generating heat, in which with structurally simple means efficient heat generation can be realized.

The above object is solved by the features of claim 1. Thereafter, a device for generating heat, with a shaft rotatably disposed within a rim, indicated, wherein at least one magnet is arranged on the shaft, so that the enclosure is due to the rotating shaft with the magnet by magnetic interaction at least partially heated and wherein the enclosure has at least one flow path to heat a fluid carried in that flow path.

In accordance with the invention, it has been recognized that the underlying object can be achieved by heating an enclosure by at least one magnet arranged on a, preferably linear, shaft. In this case, caused by the magnetic field generated by the moving magnet eddy currents within the enclosure, which heat the enclosure. In a further inventive manner has been recognized that the device is very easy to implement when the shaft is disposed within the enclosure and the enclosure has at least one flow path in which the fluid is guided. For example, the flow path may extend outwardly along the skirt so that the fluid flows outside of the skirt.

The device according to the invention may be part of a heating system, for example a building heater, but is not limited to this embodiment. In general, the device according to the invention can be applied when a fluid is directed to efficient, i. environmentally friendly and resource-saving way to be heated. Furthermore, it is essential that a plurality of magnets can be arranged on the shaft, preferably equidistant from each other. In the following, for the sake of simplicity, only one magnet is discussed, part of the disclosure also being a plurality of magnets.

Advantageously, the enclosure may be cylindrical. The enclosure can thus be arranged in a particularly simple manner around the shaft and the magnets arranged thereon and can be heated by means of magnetic interaction or inductive heating.

In a particularly advantageous manner, the flow path can be realized by at least one channel formed on the outside of the enclosure. For example, the channel can be milled out of the main body of the enclosure, turned out, etc. Concretely, the channel may be a thread-like groove in which the fluid is guided. This makes it possible to keep the fluid in contact with the enclosure over an extremely long distance and thus for a long period of time so that the fluid can be heated as needed.

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

With regard to the realization of the flow path, the enclosure may be double-walled, so that at least one annular channel is realized. It is expressly understood that such a configuration can be combined with the embodiment, according to which the enclosure has on its outer side a channel as a flow path. Depending on the field of application, the fluid can be guided exclusively in the annular 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 may be formed in the annular channel. For example, one or more guide ribs may be formed such that the fluid flows as evenly as possible through the annular channel, so that a uniform heat release 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 enclosure or at an angle to the enclosure. Any combinations of guide ribs are conceivable.

With a view to maximizing the efficiency of the device, the enclosure may at least partially consist of a metal, for example of an aluminum alloy. A particularly effective construction is feasible if the enclosure is made of an aluminum-magnesium-silicon alloy (AlMgSi) - for example AlMgSi0.5 F22, marketed under the material number 32315. A simple and reliable construction can be indicated if the enclosure as a whole consists of metal, in particular of an aluminum alloy, preferably of an aluminum-magnesium-silicon alloy.

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

Advantageously, the magnet (s) may have a magnetization quality of N42SH and / or a holding force of 26 Newton. Furthermore, it is possible that in the arrangement of a plurality of magnets, these have different properties or characteristics, such as holding force, magnetization, size, etc. The magnet or the magnets can be releasably secured to the shaft, in particular on a corresponding support means or Holding device be clipped, for example. With such a construction, the number and spatial arrangement of the magnets can be adjusted very easily. Furthermore, magnets with different characteristic numbers can be arranged on the shaft as required.

In order to achieve a high efficiency of the device, the radial distance between the magnet and the enclosure may be 2 mm to 6 mm, in particular 3 mm to 5 mm, preferably 4 mm. By radial distance is meant the removal of the opposing surfaces of magnet and skirt.

Furthermore, it is conceivable that the enclosure 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, in the radial direction of the enclosure. The housing may at least partially comprise a heat insulating material. It is also conceivable that between the enclosure and the housing, a further component is formed, for example, an insulation which radially closes a possible flow path on the outside of the enclosure.

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

Fig.1 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 now various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to the claims subordinate to claim 1 and on the other hand to refer to the following explanation of preferred embodiments of the invention with reference to the drawings. In conjunction with the explanation of the preferred embodiments of the invention with reference to the drawings, also generally preferred embodiments and developments of the teaching are explained. In the drawing show

Fig.1 1

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

Fig. 2

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

Figure 3

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

Figure 4

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

Figure 5

in a schematic, perspective view of an embodiment of a border of a device according to the invention,

Fig. 6

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

Fig. 7

in a schematic side view of the enclosure according to Fig. 5 , and

Figure 8

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

The Fig. 1 to 3 show in different, schematic representations of 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 may be detachably arranged in carrier units, not shown, so that the number and / or type and / or arrangement of the magnets 2 is variable. For ease of illustration, the magnets are 2 in Fig. 2 Not shown.

The shaft 1 is rotatable via a drive 3, for example an electric motor, so that the surround 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. As a result of the rotational movement of the magnets 2 arranged on the shaft 1, the enclosure 4 is heated 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 may be formed in the annular channel 6. Thus, the flow path 5 can be adjusted so that the fluid comes as evenly as possible with the enclosure 4 in contact and has an optimal length. In a particularly advantageous manner, the radial distance 7 between the magnet 2 and the enclosure 4 in the range of 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 enclosure 4 can be made of an aluminum alloy ideally made of an AlMgSi alloy. Alternatively or additionally, the shaft 1 of the drive 3 with more than 2,500 rev / min, preferably with 4,500 rev / min to 5,000 rev / min, be driven.

The embodiment according to Fig. 4 differs from the embodiment of Fig. 1 to 3 through the design of the flow path 5. This also runs within the enclosure 4, so that they can be considered at least in the broadest sense as double-walled. The flow path 5 is helical or helical. This achieves a particularly simple way that the largest possible area of the enclosure 4 comes into contact with the fluid, so that a 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 the device and discharged therefrom.

Furthermore corresponds Fig. 4 in the embodiment according to the Fig. 1 to 3 so that reference is made to the description herein to avoid repetition.

The Fig. 5 to 7 show an embodiment of a skirt 4 of a device according to the invention. The enclosure 4 is cylindrical and has on its outer side a channel 10 which serves as a flow path 5. The channel 10 is formed as a groove 11 which extends in a thread around the outside of the enclosure 4 around. The enclosure is made in an especially advantageous manner from an aluminum alloy, in particular from an AlMgSi alloy.

The groove may have a width 12 of 10 mm to 14 mm, in particular 11 mm to 13 mm, preferably 12 mm, and / or a depth 13 of 20 mm to 40 mm, in particular 25 mm to 35 mm, preferably 30 mm , and / or have a pitch 14 of 11 mm to 30 mm, in particular of 18 mm to 23 mm, preferably 21 mm. The enclosure 4 may have a length 15 of 250 mm to 350 mm, in particular 275 mm to 325 mm, preferably 300 mm 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 concrete embodiment, the enclosure 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 again be noted that the enclosure 4 also from a combination of in the Fig. 1 to 7 illustrated embodiments, the flow path 5 namely by an annular channel 5 according to the Fig. 1 to 3 and / or by a helical flow path 5 according to FIG Fig. 4 and / or through a groove 11 according to the Fig. 5 to 7 be educated. The flow path 5 can be designed differently in different areas of the enclosure in the axial direction of the enclosure.

Fig. 8 shows a further embodiment of a device according to the invention comprising a shaft 1 with magnets 2 fixed thereto. The shaft 1 is arranged within a casing 4. In the illustrated embodiment, the radial distance 7 between the magnets 2 and the enclosure 4 has a length of 4 mm, since the inner diameter of the enclosure 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 goes further, that the enclosure 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 may also in the in the Fig. 1 to 4 be provided devices shown and is correspondingly advantageous.

With regard to the further description of the figures, reference is made to the comments on the Fig. 1 to 7 directed. It is essential that at the in the Fig. 8 also shown in the device Fig. 5 to 7 shown enclosure 4 may be arranged.

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

Finally, it should be expressly understood that the above-described embodiments of the device according to the invention are only for the purpose of discussion of the claimed teaching, but not limit these to the embodiments.

LIST OF REFERENCE NUMBERS

1

wave

2

magnet

3

drive

4

mount

5

flow path

6

annular channel

7

distance

8th

Intake

9

procedure

10

channel

11

groove

12

width

13

depth

14

pitch

15

length

16

casing

Claims (16)

Apparatus for generating heat, comprising a shaft (1) rotatably mounted inside a skirt (4), wherein at least one magnet (2) is disposed on the shaft (1) so that the skirt (4) is in line with the shaft (1) rotating magnet (2) by means of magnetic interaction at least partially heated and wherein the enclosure (4) has at least one flow path (5) to heat a in this flow path (5) guided fluid. Apparatus according to claim 1, characterized in that the enclosure (4) is cylindrical. Apparatus according to claim 1 or 2, characterized in that the flow path (5) is realized by at least one on the outside of the enclosure (4) formed channel (10). Apparatus according to claim 3, characterized in that the channel (10) is realized as a thread-like groove (11). Apparatus according to claim 4, characterized in that the groove (11) has a pitch (14) of 11 mm to 30 mm, in particular from 18 mm to 23 mm, preferably of 21 mm. Apparatus according to claim 4 or 5, characterized in that the groove (11) has a depth (13) of 20 mm to 40 mm, in particular from 25 mm to 35 mm, preferably of 30 mm. Device according to one of claims 4 to 6, characterized in that the groove (11) has a width (12) of 10 mm to 14 mm, in particular from 11 mm to 13 mm, preferably of 12 mm. Device according to one of claims 1 to 7, characterized in that the enclosure (4) is double-walled, so that at least one annular channel (6) is realized as a flow path (5). Apparatus according to claim 8, characterized in that in the annular channel (6) at least one guide rib is formed. Apparatus according to claim 9, characterized in that the guide rib in the circumferential direction and / or in the axial direction of the enclosure (4). Device according to one of claims 1 to 10, characterized in that the enclosure (4) at least partially made of metal, in particular of an aluminum alloy, preferably of an aluminum-magnesium-silicon alloy (AlMgSi) exists. Device according to one of claims 1 to 10, characterized in that the enclosure (4) consists entirely of metal, in particular of an aluminum alloy, preferably of an aluminum-magnesium-silicon alloy (AlMgSi). Device according to one of claims 1 to 12, characterized in that the shaft (1) via a drive (3), in particular an electric motor, with at least 2,500 U / min, preferably with 4,500 U / min to 5,000 U / min, is drivable , Device according to one of claims 1 to 13, characterized in that the magnet (2) or the magnets (2) have a magnetization quality of N42SH and / or a holding force of 26 Newton. Device according to one of claims 1 to 14, characterized in that the radial distance (7) between the magnet (2) and the enclosure (4) 2 mm to 6 mm, in particular 3 mm to 5 mm, preferably 4 mm. Device according to one of claims 1 to 15, characterized in that the enclosure (4) within a housing (16) is arranged.

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