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Commercial real estate for National policies and quality standards

Release time:

2022-07-20

1. National policy

Eight ministries and commissions, including the Ministry of Education, the National Health Commission, and the Ministry of Finance, issued the "Implementation Plan for the Comprehensive Prevention and Control of Myopia in Children and Adolescents"

An excerpt from the Implementation Plan is as follows:

Children and young people are the future of the motherland and the hope of the nation. In recent years, due to the increased burden on primary and secondary school students inside and outside the classroom, the popularization of mobile phones, computers and other products with electronic screens (hereinafter referred to as electronic products), excessive eye use, unhygienic eyes, lack of physical exercise and outdoor activities, etc., the myopia rate of children and adolescents in China remains high and rising, and the myopia is becoming more and more serious at a young age and severe, which has become a major problem related to the future of the country and the nation. The prevention and control of myopia in children and adolescents requires the joint efforts of the government, schools, medical and health institutions, families, students and other parties, and the whole society needs to take action to take care of children's eyes. In order to comprehensively prevent and control myopia in children and adolescents, with the consent of the State Council, the following implementation plan is hereby proposed.

Target:

1. By 2023, strive to achieve an annual reduction of more than 0.5 percentage points in the overall myopia rate of children and adolescents in the country on the basis of 2018, and a reduction of more than 1 percentage point per year in provinces with a high incidence of myopia.

2. By 2030, the rate of new myopia among children and adolescents in the country will be significantly reduced, the overall level of vision health of children and adolescents will be significantly improved, the myopia rate of 6-year-old children will be controlled at about 3%, the myopia rate of primary school students will be reduced to less than 38%, the myopia rate of junior high school students will be reduced to less than 60%, the myopia rate of high school students will be reduced to less than 70%, and the excellent rate of meeting the national physical health standards for students will reach more than 25%.

Actions on the part of schools

Improve the visual environment. Improve teaching facilities and conditions, encourage the purchase of adjustable desks, chairs and sitting posture correctors that meet the standards, provide students with a learning environment that meets the requirements of eye hygiene, strictly follow the construction standards of ordinary primary and secondary schools and secondary vocational schools, implement lighting and lighting requirements for classrooms, dormitories, libraries (reading rooms), and use lighting equipment that is conducive to vision health. Speed up the elimination of the phenomenon of "large shifts". 100% compliance rate of school classroom lighting hygiene standards. According to the perspective of students' seats, the lighting conditions of the classroom and the changes in students' eyesight, the students' seats are adjusted every month, and the height of students' desks and chairs is adjusted individually every semester to adapt to the changes in students' growth and development.

Second, the school lighting quality standards

According to the provisions of the current national standards for classroom lighting in primary and secondary schools, in order to protect students' visual health, improve the quality of classroom lighting environment, and strengthen school energy conservation and emission reduction, this guideline is formulated.

Technical requirements

1. Lamps

(1) Lamps and lanterns must comply with GB7000.1 "Lamps and Lanterns Part 1: General Requirements and Tests", GB7000.201 "Lamps and Lanterns Part 2-1: Special Requirements - Fixed General Lamps and Lanterns", GB7000.202 "Lamps and Lanterns Part 2-2: Special Requirements - Recessed Lamps and Lanterns", GB/T17743 "Limits and Measurement Methods for Radio Disturbance Characteristics of Electrical Lighting and Similar Equipment", GB 17625.1 Electromagnetic compatibility limit, harmonic current emission limit (equipment input current per phase greater than 16A)" standard requirements.

(2) The lamps and lanterns must pass the national CCC product certification.

(3) The efficiency of general lighting fixtures should not be less than 70%.

(4) The general lighting of the classroom should not use bare lamps and lanterns, but should use batwing symmetrical light distribution lamps, and the protective angle of the lamps should be greater than 20°.

(5) On the premise of meeting the lighting quality indicators and lighting energy-saving requirements of the classroom, it is advisable to use lamps and lanterns with 30%~50% of the total luminous flux emitted from the upper hemisphere.

(6) The optical structure of the C0-180 plane of the blackboard lamp should be symmetrical, and the optical structure of the C90-270 plane should be asymmetrical.

(7) The shell material of non-aluminum profile lamps and lanterns should be cold-rolled steel plate, with a thickness of not less than 0.4mm.

(8) Classroom lamp grilles and reflectors should be treated with matte finish.

(9) The beam angle of the C90-270 plane of the blackboard lighting fixture should be in the range of 40°~60°, and the projection angle and height of the lamp should be adjustable.

2. Electronic ballasts

(1) Electronic ballasts must be used in accordance with GB19510.1 "Control Devices for Lamps Part 1: General Requirements and Safety Requirements", GB19510.4 "Control Devices for Lamps Part 4: Special Requirements for AC Electronic Ballasts for Fluorescent Lamps", GB/T17743 "Limits and Measurement Methods for Radio Disturbance Characteristics of Electrical Lighting and Similar Equipment", GB17625.1 "Electromagnetic Compatibility Limits and Harmonic Current Emission Limits (Equipment Input Current Exceeding 16A per Phase)" Standard electronic ballast.

(2) Electronic ballasts must pass the national CCC product certification.

(3) The power factor of the electronic ballast should not be less than 0.95, the total harmonic distortion should not be more than 10%, the lamp current peak ratio should not be more than 1.5, and the lamp current waveform should conform to the difference of the envelope waveform of the lamp current in each continuous half cycle, at the same time after the power supply voltage passes through the zero phase, and the difference in the envelope waveform of the lamp current should not exceed 4%.

(4) Electronic ballasts should be used durably and should meet the requirements of Article 15 of GB/T15144 "Performance Requirements for AC Electronic Ballasts for Tubular Fluorescent Lamps".

(5) The test method of electronic ballasts shall meet the requirements of GB/T15144 "Performance Requirements for AC Electronic Ballasts for Tubular Fluorescent Lamps".

3. Light source

(1) The classroom adopts rare earth trichromatic fluorescent lamps with a diameter of no more than 26mm. The luminous effect is not less than 85Lm/W.

(2) The light source used in the lamp shall meet the standard of GB/T10682 "Performance Requirements for Double-ended Fluorescent Lamps", and meet the requirements of Class 1 or Level 2 in the GB19043 "Energy Efficiency Limits and Energy Efficiency Grades of Double-ended Fluorescent Lamps for General Lighting".

(3) The general color rendering index (Ra) of the light source used in the lamp should not be less than 80, the color temperature should be 4000K-5500K, the luminous flux maintenance rate of the light source should not be less than 90% for 2000h, the luminous flux maintenance rate at 70% rated life should not be less than 85%, and the rated life of the lamp should not be less than 13000h.

(4) The mercury content of fluorescent lamps should not be higher than 5 mg.

Lighting requirements for classrooms

The maintenance average illumination value on the desktop of an ordinary classroom should not be less than 300Lx, and can be increased to 500Lx if conditions permit, and its illumination uniformity should not be less than 0.7. Table 1 shows the requirements for maintaining average illuminance and illuminance uniformity in other fields.

Classroom blackboards should be equipped with local lights, and the average illumination value should not be less than 500Lx, and its illumination uniformity should not be less than 0.8.

The minimum hanging height of the lamp from the classroom desktop should not be less than 1.7m. The lamps should be arranged in such a way that their long axis is perpendicular to the blackboard surface. For lecture theatres, the front row lights should not create direct glare for the students in the back row.

The uniform glare value of the classroom should not be greater than 16.

Under the premise of meeting the lighting quality index and lighting energy-saving requirements of the classroom, it is advisable to improve the illumination of the ceiling through indirect lighting.

Under the condition of maintaining an average illuminance value of 300lx, the lighting power density limit for ordinary classrooms should not be greater than 9W/m². Blackboard lighting is local lighting, and the blackboard lamp power is not included in the calculation of the lighting power density value. The lighting power density requirements for other field rooms are shown in Table 1.

When calculating illuminance in lighting design, the maintenance factor should be taken as 0.8.

On-site lighting quality acceptance requirements

The lighting quality of the classroom should meet the parameters specified in the standard:

The classroom lighting environment should meet the following requirements:

1. The calculation area of the above-mentioned uniformity, for the blackboard is the blackboard writing area, for other classrooms is the desk area, that is, in accordance with the relevant provisions of the GB50099 "Design Code for Primary and Secondary Schools" when the desks and chairs are arranged, the area between the front edge of the front row of desks and the back edge of the last row of desks is the width of the classroom. Uniformity is defined as: Uniformity = E Min / E Average

2. The illuminance standard value of the blackboard is the illuminance value of mixed lighting.

3. The minimum hanging height of the luminaire from the class table should not be less than 1.7m.

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Commercial real estate for National policies and quality standards