Solar cooker use and maintenance

Key Points

1. Important Notes: 1. The solar cooker requires a spacious and well-chosen location. It should be placed in an open, sheltered, and flat area near the north wall of your house. Ensure the base is firmly grounded for stability. 2. Avoid placing it near tall buildings, trees, poles, or any structures that may cast shadows. 3. Do not place it in areas with frequent human activity, livestock movement, or machinery, as this could interfere with its use. 4. Keep it away from flammable materials like grass, trees, or dry leaves. 5. Avoid damp or wet locations to prevent damage to the structure and components.

Method

2. Usage Instructions: 1. The bottom of the solar cooker should be black to absorb more heat. If it's a new model, using black wood or applying black paint can help reduce light transmission and increase reflection, improving thermal efficiency. 2. Proper installation is crucial. Adjust the reflector so that it rotates smoothly based on the distance from the parabola’s focal point and the guide line. Follow the design specifications to ensure optimal performance. 3. When using the cooker, adjust it according to the time of day and season. As the sun moves from east to west, you need to manually track it by adjusting the orientation and height. First, turn the cooker left or right so the cooking surface faces the sun. Then, adjust the height by lifting or lowering the top part while rotating the adjustment screw to keep the focus on the bottom of the pot. 4. To improve heat retention and reduce losses, consider making a heat-insulating sleeve. This can be made from a lightweight, heat-resistant material such as a bottomless iron box (available locally in rural areas). The sleeve should have two parts: an insulating ring and a cap. The ring can be made from a heat-resistant cylinder, and the cap can be sewn from thick cotton cloth. Make sure the total weight doesn’t exceed 2 kg. 5. The pot lid must be tight and airtight to maintain heat inside the cooker.

Maintenance

1. Stove Surface: 1. The reflective surface is the most critical part of the cooker. Proper care will extend its life and maintain efficiency. Avoid scratching or damaging the aluminized film. 2. Clean the surface gently with a soft cloth or sponge if it gets dusty, wet, or muddy. Never use abrasive materials or chemicals that could damage the reflective layer. 3. Be careful not to let people or objects scratch the surface or touch the lens directly. 4. The weight on the cooker frame and brackets should not exceed 10 kg. 5. In windy conditions, place the cooker in a sheltered area. If necessary, add weights to the base to prevent it from tipping over. 6. After each use, position the cooker away from direct sunlight. When leaving home, secure it in a safe place. If unused for a long time, check the moving parts for rust or stiffness and apply anti-rust paint if needed. 7. Over time, the reflective film or other components may need replacement. Regular maintenance based on the original design and performance data will help maintain its efficiency and extend its lifespan.

2. Stove Body: 1. Protect the reflective surface from rain and hail. Cover the cooker with plastic or a shed during rainy days to prevent water from entering the lens gaps. 2. Avoid hitting the cooker with objects, as this can cause damage. 3. Ensure the cooker remains flexible and easy to adjust—both horizontally and vertically—with smooth rotation for best performance.

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