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5.1 The solar cooker should be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5.2 Solar cooker thermal performance indicators and structural dimensions. 5.2.1 Thermal efficiency of boiling water: The parabolic solar cooker is not less than 55%, and the Fresnel reflector solar cooker is not less than 45%. 5.2.2 The area of ​​light spot in the temperature zone above 400°C is not less than 50cm2, not more than 200cm2, and the edges are neat and round or oval. 5.2.3 The maximum operating height is not more than 1.25m. 5.2.4 The maximum operating distance is not more than 0.80m. 5.2.5 For solar cookers with a lighting area greater than 3.0 m2, the maximum operating height and maximum operating distance are allowed to be greater than the values ​​specified in 5.2.3 and 5.2.4. 5.2.6 Minimum use height angle is not more than 25. 5.2.7 The maximum use height angle is not less than 70. 5.2.8 In the use range of the elevation angle, the inclination of the pot ring and the horizontal plane is not more than 5. 5.2.9 Automatic tracking type solar cooker, the tracking angle error does not exceed 2. 5.3 Reflective materials are required to have a high solar reflectance (aluminized film is not less than 0.80 and other reflective materials are not less than 0.70). Good wear resistance and aging resistance. 5.4 The cooking surface should be smooth and smooth without cracks and damage, and the reflective material should be well-bonded. The flexible reflective material should not be wrinkled. There should be no more than 5 per square metre of uplifted area, and each area should not exceed 4cm2. The gap between the two glass mirrors is not more than 1mm, and the edges are neat without damage. 5.5 The support frame of the stove shell should be in good contact with the stove frame after installation, and be stable and stable. 5.6 Weldments shall comply with the provisions of Q/ZB 74. 5.7 paint surface should be smooth, uniform, consistent color, and have strong adhesion and anti-aging properties. 5.8 Height angle and azimuth adjustment mechanism should be easy to operate, accurate, stable and reliable. 6 Structure Detection Methods
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