The sterilization and antibacterial environment test chamber is made of 8K mirror stainless steel with a roughness of less than 0.25 microns. The surface is smooth and clean. The design and structure of an airtight test chamber used at the hatch opening should ensure that microbial aerosols in the chamber do not leak out, and the materials used should be corrosion-resistant and easy to clean.
The antibacterial sterilization purification function test chamber is mainly used for the limited space device of the purifier's ability to remove target pollutants in the air, and can be CCM test equipment for the cumulative purification capacity of specific pollutants.
1. Installation of the test group prototype
Install the prototype to the far end of the sterilization and antibacterial aerosol chamber according to the installation instructions of the tested prototype.
2. Installation of the blank control group prototype
Install a product of the same model and batch as the tested prototype, and remove all parts with sterilization and sterilization functions, or set the sterilization and sterilization functions to inactive states.
3. Test steps of sterilization and antibacterial aerosol chamber
3.1 Sterilization Sterilize the test utensils used in the test.
3.2 Purify and sterilize the air of the aerosol cabin through a filter so that its cleanliness is not lower than level 7 (level 10,000)
3.3 Adjust the temperature and relative humidity of the aerosol cabin, and keep it stable for a period of time (to ensure that the temperature and relative mixing degree are relatively constant during the whole experiment).
3.4 Open the air supply device in the operation room, and send the circulating air through the filter to maintain the air pressure in the operation room as positive pressure (15Pa~30Pa) to prevent the leakage of microbial aerosols in the test chamber.
3.5 Take the test bacteria suspension and dilute it to the required concentration with nutrient broth medium. Spray the bacteria according to the pressure, gas flow rate and spray time set by the spray infection device, and it is required to use an air stirring device (such as a fan) to stir while spraying. After spraying the bacteria, it is required to continue stirring for 10 minutes, and then let it stand for 15 minutes.
3.6 At the same time, the test group and the control group are respectively sampled for bacterial concentration before operation. The sampling time is 1min~5min, and the sampling head should be upward during sampling. It is required that the number of positive control bacteria in the aerosol indoor air should be 5.0×104CFU/m³~5.0×105CFU/m³, otherwise the test will be invalid.
3.7 Run the tested prototype to the highest sterilization condition specified by the manufacturer (if not specified by the manufacturer, the highest wind speed and the maximum air outlet state shall prevail). For air conditioner products, test according to the air supply status.
The test bacteria are: Staphylococcus albsp 8032 or other suitable non-pathogenic microorganisms
1. Sterilization: Sterilize the test vessels used in the test.
2. Use high-efficiency filters to purify and sterilize the air in the aerosol cabin so that its cleanliness is no less than level 7 (level 10,000)
3. Adjust the temperature and relative humidity of the air dew chamber to maintain stability. After a period of time (to ensure that the temperature and relative humidity are relatively constant during the entire experiment), the aerosol chamber is sealed and must not be opened again during the entire test.
4. Open the air supply device in the operation room and send in circulating air that has passed through the high-efficiency filter to maintain the air pressure in the operation room at a positive pressure (15Pa~30Pa) to prevent the leakage of microbial aerosols in the test chamber.
5. Take the test bacteria liquid and dilute it with nutrient broth culture medium to the required concentration. Spray the bacteria according to the pressure, gas flow and spray time set by the spray dyeing device. It is required to use air stirring equipment (such as a fan) to stir while spraying. After spraying and staining, it is required to continue stirring for 10 minutes and then let it stand for 15 minutes.
6. At the same time, conduct bacterial concentration sampling in the air dew chambers of the test group and the control group before operation. The sampling time is 1min~5min. When sampling, the sampling head should be upwards. The number of positive control bacteria in the air in the air-zero room should be 5.0X10 CFU. / ~5.0X105 CFU/m otherwise the test will be invalid
7. Run the tested prototype to the highest sterilization condition specified by the manufacturer (if the manufacturer does not specify, the highest wind speed and maximum air outlet condition shall prevail). For air conditioner products, tests are conducted based on the air supply status.
| GB/18801-2015 |
Air Purifier |
| GB/18803-2002 |
Indoor Air Quality Standard |
| GB 50243-2002 |
Code for construction acceptance of ventilation and air conditioning engineering |
| GB7251-1997 |
Low-voltage switchgear and control equipment |
| GB 21551.6-2010 |
Special requirements for air conditioners with antibacterial and sterilization functions for household and similar electrical appliances |
| GB 21551.3-2010 |
Antibacterial, sterilizing and purifying functions of household and similar electrical appliances-Special requirements for air purifiers |
| Test chamber volume |
20m3 |
| Test room size |
2850 × 2800 × 2500mm (L×W×H), allow ±0.3m3 deviation |
| Frame |
Stainless steel square tube as bracket |
| Wall |
10mm thick float glass |
| Floor |
The stainless steel square tube is used as the bracket, and the glass and 2.0mm thick 304 stainless steel plate are veneered after leveling to ensure that the floor will not be deformed after long-term use. |
| Roof |
The roof is made of 304 stainless steel with a thickness of 3mm. In order to ensure the bearing capacity of the top, a stainless steel square tube is added to the outside of the chamber. |
| Door |
800×1800mm (W×H), single opening and fully sealed, both indoor and outdoor opening |
| Sealing material |
With silicone rubber strip and glass sealant |
| Stirring fan |
Diameter 1400mm, three-leaf metal blade |
| Sliding trolley |
Made of 304 stainless steel, the double track can be moved back and forth by electric stacking. The test product is placed on the top of the trolley, which is convenient for adjusting the gear position of the test product, starting and reaching the rated state. |
| Sampling (incoming) sample hole |
3 per side, located on the left and right side walls of the main entrance; with ball valve control, with hoses; |
| Illumination |
Configure 1 single tube fluorescent tube |
| UV disinfection |
Brand: Lamp model: TUV 30W Lamp power: 30W |
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