GB/T 18497.1-2019 in English

Interpretation of GB/T 18497.1—2019, the National Standard of the People's Republic of China

I. Background and significance of standard formulation

GB/T 18497 "Characteristics of electric infrared emitters for industrial heating" is divided into two parts. This part (Part 1) mainly regulates the technical requirements of short-wave electric infrared emitters. Compared with the old version of the standard GB/T 18497.1—2001, the new version of the standard has made important updates in terms of term definitions, technical parameters and test methods:

• Added a number of new terms, such as "electric infrared emitter" and "plate emitter".
• Added a performance evaluation index system, including key parameters such as electric-thermal radiation conversion efficiency and effective radiation energy ratio.
• Improved the test method and directly quoted GB/T 7287—2008 as the basis for testing.
• Inspection rules and packaging and transportation requirements have been added to ensure more comprehensive product quality control.

II. Comparison of standard frameworks

III. Interpretation of core technical requirements

This standard puts forward comprehensive technical requirements for short-wave electric infrared emitters, mainly including the following aspects:

1. Basic parameters

• Rated power: the design power marked on the emitter.
• Operating temperature: the average temperature of the radiation surface in a stable working state under rated voltage. For transparent material substrates, it is defined as the distribution temperature.
• Electro-thermal radiation conversion efficiency: The percentage of input electrical power converted into infrared radiation energy, which must not be less than 50%.

2. Installation and use conditions

• Operating environment: Relative humidity is not more than 90%, there is no flammable, explosive gas and conductive dust, and the allowable voltage fluctuation range is ±10%.
• Life requirements: The continuous working life under normal use conditions is not less than 5000 hours.

3. Safety and performance indicators

• Insulation resistance: Both cold and hot states are not less than 50 MΩ (except for products with exposed heating elements).
• Leakage current: Not more than 0.75 mA at operating temperature.
• Radiation characteristics: The radiation energy in the effective infrared band (1~25 μm) accounts for no less than 60% of the total radiation energy.

IV. Implementation suggestions

To ensure the effective implementation of the standard, it is recommended to start from the following aspects:

1. Production link: Design and manufacture in strict accordance with the requirements of the standard, with a focus on the selection of heating element materials, packaging process and power regulation system.
2. Testing link: Establish a complete testing system and equip with advanced testing equipment to ensure that all technical indicators meet the requirements.
3. Use and maintenance: Users should operate and maintain according to the product manual, and regularly check key parameters such as operating temperature, leakage current, etc.
4. Standard promotion: Organize relevant personnel training to improve their understanding and application capabilities of the new version of the standard.