CH675908A5 - Solar energy cooker - comprises plate mounted on stand and unit concentrating sun rays into bundle and direction them at plate - Google Patents
Solar energy cooker - comprises plate mounted on stand and unit concentrating sun rays into bundle and direction them at plate Download PDFInfo
- Publication number
- CH675908A5 CH675908A5 CH867/88A CH86788A CH675908A5 CH 675908 A5 CH675908 A5 CH 675908A5 CH 867/88 A CH867/88 A CH 867/88A CH 86788 A CH86788 A CH 86788A CH 675908 A5 CH675908 A5 CH 675908A5
- Authority
- CH
- Switzerland
- Prior art keywords
- hotplate
- stand
- plate
- converging lens
- sun
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
- F24S23/31—Arrangements for concentrating solar-rays for solar heat collectors with lenses having discontinuous faces, e.g. Fresnel lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/30—Solar heat collectors for heating objects, e.g. solar cookers or solar furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
- Y02B40/18—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers using renewables, e.g. solar cooking stoves, furnaces or solar heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cookers (AREA)
Abstract
The solar-energy cooker comprises a plate (7) mounted on a stand (1), and a unit concentrating the sunrays into a bundle and direction them at the plate. This unit incorporates a collecting lens (13), which can be arranged to hinge in relation to the plate, its distance from the latter being also adjustable. The plate can form a heat-accumulator and there can be a vertical flange (9) on its side towards the sun. ADVANTAGE - The concentrating unit does not get dirty.
Description
Gegenstand der Erfindung ist ein Gerät zum Kochen unter Ausnutzung der Sonnenenergie gemäss dem Oberbegriff des Patentanspruches 1.
Das Kochen mittels Sonnenenergie ist bekannt.
Die Schweizer Patentschrift Nr. 597 574 zeigt ein Gerät zum Kochen, bei dem mittels eines paraboloidischen Hohlspiegels die Sonnenstrahlen gebündelt und dann von unten an einen an einem Ständer angeordneten Pfannenträger gelenkt werden. Bei hohem Sonnenstand befindet sich der Hohlspiegel unterhalb der Kochstelle.
Das bekannte Gerät zum Kochen mittels Sonnenstrahlen hat den Nachteil, dass der Hohlspiegel stets ganz oder teilweise unterhalb des Pfannenträgers angeordnet ist und durch auszulaufende Flüssigkeit oder Fettspritzer vom Kochgut verschmutzt wird. Eine Verschmutzung der spiegelnden Oberfläche des Hohlspiegels vermindert dessen Funktionsfähigkeit.
Im weiteren werden mit dem bekannten Gerät nur gerade die an die Unterseite des Pfannenträgers umgelenkten und gebündelten Sonnenstrahlen ausgenutzt. Bei niedrigem Sonnenstand und folglich annähernd vertikal stehendem Hohlspiegel fallen die gebündelten Strahlen einerseits in einem spitzen Winkel auf die im Pfannenträger gehaltene und als Kochplatte dienende Pfanne und anderseits kann nur ein Teil des Strahlenbündels ausgenutzt werden, da die nutzbare projizierte Fläche bei schrägem Einfall geringer ist als bei annähernd rechtem Winkel.
Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, ein Gerät zum Kochen mittels Sonnenstrahlen zu schaffen, dessen Vorrichtung zur Bündelung der Sonnenstrahlen zum Kochgut nicht verschmutzt und bei jedem Sonnenstand optimal ausnutzbar ist.
Hier erfolgt die Bündelung der zur Erde kommenden parallelen Sonnenstrahlen mittels einer Sammellinse, die weit weg und über der Kochplatte plaziert ist.
Im weiteren ist die Kochplatte nicht nur ein Pfannenträger bzw. eine Pfanne sondern viel mehr. Sie ist ein räumliches L-Profil, dessen horizontal gerichteter Schenkel nicht nur eine Kochplatte, sondern auch ein Wärmespeicher ist.
Sein senkrecht gerichteter Schenkel sorgt dafür, dass die gebündelten Sonnenstrahlen auch bei niedrigem Sonnenstand aufgefangen und der Kochplatte zugeleitet werden. Anderseits ist der vertikale Schenkel ein Wärmeschutz für den Hintergrund.
Anhand eines illustrierten Ausführungsbeispiels wird die Erfindung näher erläutert. Es zeigen:
Fig. 1 ein Gerät mit im wesentlichen horizontal angeordneter Linse in perspektivischer Darstellung,
Fig. 2 das Gerät gemäss Fig. 1 mit geneigter Linse in Seitenansicht und
Fig. 3 ein vergrössertes Detail von Fig. 1.
Auf einem Ständer 1 mit einem Sockel 3 und einer Säule 5 ist eine Kochplatte 7 in Gestalt einer Wärmespeicherplatte, und ein Arm 11, beide drehbar (um die Z-Achse), aufgesetzt. Als Wärmespeicherplatte 7 gilt eine Platte, welche mindestens 10% der für den Kochprozess notwendigen Wärme aufnehmen und während des Kochvorganges an das Kochgut abgeben kann. Die Kochplatte 7 mit ihrem vertikalen Schenkel 9 hat eine grosse Wärmekapazität und eine gute Wärmeleitfähigkeit.
An der Kochplatte 7 ist der Arm 11 schwenkbar um die X-Achse befestigt. Am anderen Ende des Armes 11 befindet sich eine Vierkanthülse 15 in der ein bespannter Rahmen 21, in Funktion eines Linsenträgers, verschiebbar befestigt ist. Auf dem Rahmen 21 ist eine Sammellinse in Gestalt einer Stufensammellinse 13, auch Fresnel-Linse genannt, aufgesetzt. Die Stufensammellinse weist die Eigenschaft auf, dass ihr V-Wert, d.h. das Verhältnis ihres hydraulischen Durchmessers Dh zu ihrer Dicke s grösser als
EMI3.1
ist, wobei
EMI3.2
ist.
Im dargestellten Fall sind:
A = a x b bzw . U = 2 (a + b).
Die Linse 13 kann eine beliebig wählbare Form aufweisen, beispielsweise eine Rechteckform.
Damit der Sockel 3 des Ständers 1 nicht zu gross oder zu schwer ausgeführt werden muss, wird das Gewicht der Linse 13 durch eine Stütze 17 getragen. Die Stütze 17 wird dabei in einer Hülse 19 geführt. Die Hülse 19 ist am Rahmen 21 zwischen Laschen 23 gelenkig (mit zur X-Achse paralleler Schwenkachse) angeordnet. In Fig. 2 ist rein schematisch die Linse 13 in geneigter Stellung dargestellt, wie sie bei niedrigem Sonnenstand einzustellen ist. Die gebündelten Sonnenstrahlen 25 fallen dabei nicht nur auf die Oberfläche der Kochplatte 7, sondern auch auf ihren vertikalen Schenkel 9.
Damit möglichst die gesamte Energie der auf die Kochplatte 7 fallenden Strahlen 25 absorbiert werden kann, ist diese vorzugsweise mattschwarz gefärbt. Auf diese Weise kann die Kochplatte vor dem Kochen aufgewärmt werden, so dass das Kochgut nicht nur von oben von den gebündelten Sonnenstrahlen 25, sondern gleichzeitig auch von unten von der Wärmeplatte 7 erwärmt wird. Um die bestrahlte Fläche bzw. die örtliche Temperatur auf der Wärmeplatte 7 bzw. einer darauf stehenden Pfanne einstellen zu können, lässt sich die Linse 13 relativ zur Kochplatte 7 in der Vierkanthülse 15 verschieben. Dabei geht die Ausrichtung der Strahlen 25 auf die Wärmeplatte 7 bei jeder beliebigen Linsenstellung nicht verloren.
Alle Beweglichkeiten des Gerätes können mittels Handschrauben in der gewünschten Lage blockiert werden.
The invention relates to a device for cooking using solar energy according to the preamble of claim 1.
Cooking with solar energy is well known.
Swiss patent no. 597 574 shows a device for cooking, in which the sun's rays are focused by means of a paraboloidal concave mirror and then directed from below to a pan support arranged on a stand. When the sun is high, the concave mirror is located below the hob.
The known device for cooking by means of sun rays has the disadvantage that the concave mirror is always arranged entirely or partially below the pan support and is contaminated by the food to be spilled by liquid or fat splashes. Contamination of the reflecting surface of the concave mirror reduces its functionality.
Furthermore, only the sun rays deflected and focused on the underside of the pan support are used with the known device. When the sun is low and consequently almost vertically standing concave mirror, the focused rays fall on the one hand at an acute angle onto the pan held in the pan support and serve as a hotplate, and on the other hand only part of the beam can be used, since the usable projected area is less than when the angle is inclined at an almost right angle.
The invention, as characterized in the claims, solves the problem of creating a device for cooking by means of sun rays, the device for focusing the sun rays into the food to be cooked is not soiled and can be optimally used in any position of the sun.
Here, the parallel rays of the sun coming to earth are focused using a converging lens, which is placed far away and above the hotplate.
Furthermore, the hotplate is not just a pan support or a pan, but much more. It is a spatial L-profile, the horizontally oriented leg of which is not only a hotplate, but also a heat store.
Its vertically directed leg ensures that the concentrated sun rays are caught even when the sun is low and fed to the hotplate. On the other hand, the vertical leg is heat protection for the background.
The invention is explained in more detail with the aid of an illustrated embodiment. Show it:
1 is a device with a substantially horizontally arranged lens in a perspective view,
Fig. 2 shows the device of FIG. 1 with an inclined lens in side view and
3 shows an enlarged detail from FIG. 1.
On a stand 1 with a base 3 and a column 5, a hot plate 7 in the form of a heat storage plate, and an arm 11, both rotatable (about the Z axis), are placed. A heat storage plate 7 is a plate which can absorb at least 10% of the heat required for the cooking process and can release it to the food during the cooking process. The hotplate 7 with its vertical leg 9 has a large heat capacity and good thermal conductivity.
On the hotplate 7, the arm 11 is pivotally attached about the X axis. At the other end of the arm 11 there is a square sleeve 15 in which a covered frame 21, in the function of a lens holder, is slidably attached. A collecting lens in the form of a step-collecting lens 13, also called a Fresnel lens, is placed on the frame 21. The step-up lens has the property that its V-value, i.e. the ratio of their hydraulic diameter Dh to their thickness s greater than
EMI3.1
is where
EMI3.2
is.
In the case shown:
A = a x b or U = 2 (a + b).
The lens 13 can have any shape, for example a rectangular shape.
So that the base 3 of the stand 1 does not have to be made too large or too heavy, the weight of the lens 13 is carried by a support 17. The support 17 is guided in a sleeve 19. The sleeve 19 is articulated on the frame 21 between tabs 23 (with a pivot axis parallel to the X axis). In Fig. 2, the lens 13 is shown purely schematically in an inclined position, as can be adjusted when the sun is low. The bundled sun rays 25 fall not only on the surface of the hotplate 7, but also on its vertical leg 9.
So that as much as possible the entire energy of the rays 25 falling on the hotplate 7 can be absorbed, it is preferably colored matt black. In this way, the hotplate can be warmed up prior to cooking, so that the food to be cooked is heated not only from above by the concentrated sun rays 25, but also from below by the hotplate 7. In order to be able to set the irradiated surface or the local temperature on the hot plate 7 or a pan standing thereon, the lens 13 can be displaced in the square sleeve 15 relative to the hot plate 7. The alignment of the rays 25 on the hot plate 7 is not lost with any lens position.
All mobility of the device can be blocked in the desired position using hand screws.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH867/88A CH675908A5 (en) | 1988-03-08 | 1988-03-08 | Solar energy cooker - comprises plate mounted on stand and unit concentrating sun rays into bundle and direction them at plate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH867/88A CH675908A5 (en) | 1988-03-08 | 1988-03-08 | Solar energy cooker - comprises plate mounted on stand and unit concentrating sun rays into bundle and direction them at plate |
Publications (1)
Publication Number | Publication Date |
---|---|
CH675908A5 true CH675908A5 (en) | 1990-11-15 |
Family
ID=4197029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH867/88A CH675908A5 (en) | 1988-03-08 | 1988-03-08 | Solar energy cooker - comprises plate mounted on stand and unit concentrating sun rays into bundle and direction them at plate |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH675908A5 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5706798A (en) * | 1996-03-15 | 1998-01-13 | Steinorth; Edward O. | Solar lens, stove and solar panel combination |
NL1006657C2 (en) * | 1997-07-24 | 1999-01-27 | Halmos Beheer En Exploitatie B | Solar energy powered heater for e.g. food |
DE102010014027A1 (en) * | 2010-04-05 | 2011-10-06 | Helmut Emmerich Hayer | Cooking appliance unit has cooking pot that is provided with cover, where cover is provided as magnifying glass and magnifying glass is provided as burning glass and convex lens |
DE102010015619A1 (en) * | 2010-04-19 | 2011-11-24 | Helmut Emmerich Hayer | Method for manufacturing lid for cooking pot utilized for cooking in open fire, involves attaching magnifying glass or convex lens as burning glass, and adjusting glass or lens in height so that focal- and arc spots are fixed in cooking pot |
WO2015092363A3 (en) * | 2013-12-16 | 2015-08-27 | Stirling Howieson | Improvements in or relating to apparatus for cooking |
WO2018042163A1 (en) * | 2016-08-30 | 2018-03-08 | Stirling Howieson | Improvements in or relating to apparatus for cooking |
-
1988
- 1988-03-08 CH CH867/88A patent/CH675908A5/en not_active IP Right Cessation
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5706798A (en) * | 1996-03-15 | 1998-01-13 | Steinorth; Edward O. | Solar lens, stove and solar panel combination |
WO1998022759A1 (en) * | 1996-11-19 | 1998-05-28 | Steinorth Edward O | Solar lens, stove and solar panel combination |
NL1006657C2 (en) * | 1997-07-24 | 1999-01-27 | Halmos Beheer En Exploitatie B | Solar energy powered heater for e.g. food |
DE102010014027A1 (en) * | 2010-04-05 | 2011-10-06 | Helmut Emmerich Hayer | Cooking appliance unit has cooking pot that is provided with cover, where cover is provided as magnifying glass and magnifying glass is provided as burning glass and convex lens |
DE102010015619A1 (en) * | 2010-04-19 | 2011-11-24 | Helmut Emmerich Hayer | Method for manufacturing lid for cooking pot utilized for cooking in open fire, involves attaching magnifying glass or convex lens as burning glass, and adjusting glass or lens in height so that focal- and arc spots are fixed in cooking pot |
WO2015092363A3 (en) * | 2013-12-16 | 2015-08-27 | Stirling Howieson | Improvements in or relating to apparatus for cooking |
GB2522535B (en) * | 2013-12-16 | 2020-07-29 | Howieson Stirling | Improvements in or relating to apparatus for cooking |
WO2018042163A1 (en) * | 2016-08-30 | 2018-03-08 | Stirling Howieson | Improvements in or relating to apparatus for cooking |
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Legal Events
Date | Code | Title | Description |
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PL | Patent ceased |