Solar cooking apparatus

• US 9,377,215 B2
• Filed: 07/23/2012
• Issued: 06/28/2016
• Est. Priority Date: 07/22/2011
• Status: Active Grant

• Current Assignee: GoSun Inc.
• Original Assignee: Applied Sunshine, LLC
• Inventors: Sherwin, Patrick
• Primary Examiner(s): Savani, Avinash
• Assistant Examiner(s): Blum, George R
• Application Number:
  US13/555,213
• Publication Number:
  US 20130022727A1
• Time in Patent Office: 1,436 Days
• Field of Search: 126/526, 126/681, 426/523
• US Class Current: 1/1
• CPC Class Codes: A23L 5/15 using wave energy, irradiation, electrical means or magnetic fields, e.g. oven cooking or roasting using radiant dry heat
• CPC Class Codes: A23V 2002/00 Food compositions, function of food ingredients or processes for food or foodstuffs
• CPC Class Codes: F24S 20/30 Solar heat collectors for heating objects, e.g. solar cookers or solar furnaces
• CPC Class Codes: F24S 23/71 with parabolic reflective surfaces with cylindro-parabolic reflective surfaces F24S23/74
• CPC Class Codes: F24S 23/745 flexible
• CPC Class Codes: F24S 30/425 Horizontal axis
• CPC Class Codes: F24S 50/20 for tracking
• CPC Class Codes: F24S 70/00 Details of absorbing elements
• CPC Class Codes: F24S 80/00 Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
• CPC Class Codes: Y02B 40/18 using renewables, e.g. solar cooking stoves, furnaces or solar heating
• CPC Class Codes: Y02E 10/40 Solar thermal energy, e.g. solar towers
• CPC Class Codes: Y02E 10/47 Mountings or tracking

Abstract

The present invention relates to a solar cooking apparatus, comprising: a first solar reflector; a second solar reflector; a solar collection element; and a solar collection element holder, wherein the first solar reflector and the second solar reflector are concave, and opposably arranged and aligned with a solar collection element axis, each reflector having a range of motion on a plane perpendicular to the solar collection element axis, and focusing radiation at the solar collection element, which rapidly heats when the first and/or second solar reflectors are in an opened position, the first and second solar reflectors protectably encase the solar collector when in a closed position. The solar cooking apparatus is adjustable and, in some embodiments, portable.

Claims

1. A solar cooking apparatus, comprising:

a first solar reflector;

a second solar reflector;

a solar collection element, comprising an inner tube having an inner tube diameter, an inner tube length, an inner tube open end, an inner tube closed end, an interior surface enclosing an interior space, and an exterior surface, the interior and exterior surfaces extending the inner tube length, wherein the exterior surface comprises one or more layers consisting essentially of aluminumnitrile/aluminum, aluminum-nitrile/stainless steel/copper, or borosilicate/aluminum/stainless steel/copper, and the outer tube having an outer tube diameter, an outer tube length, an outer tube open end, an outer tube closed end, and a barium getter, wherein the outer tube diameter and the outer tube length are both greater than the inner tube diameter and the inner tube length, wherein the inner tube is fixed inside of the outer tube and sealed between the inner open end and outer tube open end to form a hollow space extending the length of the exterior tube under vacuum pressure between the exterior wall of the inner tube and the outer tube;

a solar collection element holder, wherein

the first solar reflector and the second solar reflector are concave and parabolic, and are in a substantially symmetrical arrangement to a solar collection element axis, each reflector having a range of motion upon a solar reflector hinge on a plane perpendicular to the solar collection element axis, to focus solar radiation at the solar collection element from a reflective surface when the first or second solar reflectors are in an opened position, the first and second solar reflectors protectably encase the solar collector when in a closed position, the solar reflector hinge is mounted upon a bracket aligned with the solar element axis that allows for the solar cooking apparatus to rotate on a horizontal plane parallel to the ground when the solar cooking apparatus is in an unfolded standing position;

a cooking implement that fits within the inner tube, having a length less than or equal to the inner tube length and an open trough configuration;

a cleaning implement that is attachable to a first cooking implement end; and

a foldable stand to put the solar cooking apparatus in a horizontal orientation for use when the foldable stand is in the unfolded standing position, comprising two curved legs having a contour that follows the first and second solar reflectors in the closed position and form a handle when two curved legs are in a folded position.

2. The cooking apparatus of claim 1, wherein the solar collection element is comprised of borosilicate glass or Vycor®

glass.

3. The cooking apparatus of claim 1, wherein the solar collection element is enclosable with a cap element that is attached at the inner tube open end to withstand cooking pressure in the interior space.

4. The solar cooking apparatus of claim 1, wherein the first solar reflector and the second solar reflector are comprised of at least one of anodized aluminum, stainless steel, chrome, mylar, silver film, plastic film or metallic paint.

5. The solar cooking apparatus of claim 1, wherein the first and second solar reflectors are interlockable in the closed position or closable to protect the solar collection element and the reflective surface of each solar reflector.

9. The solar cooking apparatus of claim 1, being portable.

10. The solar cooking apparatus of claim 1, the foldable stand comprising a tripod.

6. The solar cooking apparatus of claim gi, the cooking implement comprising:

a first implement end;

a second implement end;

an implement length less than or equal in length to the inner tube length;

a trough having a length less than the cooking implement length; and

a diameter less than the inner tube diameter, wherein the first implement end is closed and insertable into the inner tube open end, the second implement end is fashioned with a heat-resistant cooking implement handle.

7. The solar cooking apparatus of claim 6, wherein the cooking implement has a concave cooking surface extending between the first implement end and the second implement end, the concave cooking surface being accessible when the cooking implement is outside of the solar cooking apparatus.

8. The solar apparatus of claim 6, the cooking implement open trough configuration is a concave cooking surface between 40% to 70% round.