Formaldehyde and voc release rate selection parameters of large test chamber
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Formaldehyde voc large test chamber is mainly used to test the formaldehyde and voc release rate of wood products furniture, and wood products furniture is generally relatively large, and the effective volume of the test chamber naturally can not be small, below, list some formaldehyde voc large test chamber configuration performance requirements, for everyone selection as a reference.
1. Inner cabin: arc transition is adopted for intersecting redaction of inner wall of test cabin
2. Volume: volume ≥12m³, such as HUANYI instrument HYV-12, HYV-20 and other models.
3. Use conditions: temperature :(23.0±0.5)℃; Relative humidity :(50.0±5.0)%; Number of air changes :(1.00±0.05)h-1.
4. Cabin body material: Inner wall, inlet and outlet air pipes and sealing materials should be made of stainless steel with low adsorption and low release.
5. Cabin background concentration: formaldehyde should be no more than 0.006mg /m³, single target VOC concentration should be no more than 0.005mg /m³, TVOC concentration should be no more than 0.05mg /m³, or lower than 15% of the minimum concentration of target pollutants in the cabin measured by the tested sample.
6. Pressure: maintain positive pressure above 5 Pa in the cabin duHUANYI operation.
7. System composition: composed of cabin body, air conditioning system (HVAC system) control system, etc. Common test cabin ventilation systems include DC system and return air system.
8. Air tightness: under the condition that the pressure difference between inside and outside the test chamber is 5 Pa~10 Pa, the total air leakage rate (leakage rate) of the test chamber system is not more than 3%.
9. Recovery rate: The recovery rate of both toluene and n-dodecane standard samples from the test chamber system shall not be less than 80%.
The configuration parameters of the above formaldehyde voc large test chamber can also be adjusted according to the requirements of the test scheme. If you want to obtain the technical scheme, you can contact the small edition or visit the official website of "Huanyi Instrument" to consult the relevant technical personnel
