Embodiments of the invention provide a containment system having a primary air inlet and an alternate inlet. In one embodiment, a containment system includes a housing configured to retain a main filter, the housing having a primary air inlet and an access door configured to access an interior of th
Embodiments of the invention provide a containment system having a primary air inlet and an alternate inlet. In one embodiment, a containment system includes a housing configured to retain a main filter, the housing having a primary air inlet and an access door configured to access an interior of the housing. The access door has an alternate airflow inlet. In another embodiment, an air distribution plate includes a front surface having a first edge and an opposing second edge, wherein the front surface is configured to allow air to pass therethrough. Flow resistance through the front surface is greater proximate the second edge relative the first edge. In yet another embodiment, a method for testing a filter includes closing a damper and flowing air into a containment housing through an inlet formed though an access door and across an air distribution plate to a filter, and testing the filter.
대표청구항▼
1. A containment system comprising: a housing configured to hold a filter in a position that separates an upstream section from a downstream section, the housing having a first airflow inlet communicating with the upstream section and an airflow outlet communicating with the downstream section, the
1. A containment system comprising: a housing configured to hold a filter in a position that separates an upstream section from a downstream section, the housing having a first airflow inlet communicating with the upstream section and an airflow outlet communicating with the downstream section, the housing having an access port formed in the housing communicating with the upstream section;an access door configured to close the access port, the access door operable to place the access port in an open state and a closed state; anda sealable second airflow inlet formed through the access door, the sealable second airflow inlet configurable between a sealed state and an open state, wherein the access port is sealed when the access door is in the closed state and the sealable second airflow inlet is in the sealed state, and wherein the downstream section is in fluid communication with the second airflow inlet when the access door is in the closed state and the second airflow inlet is in the open state. 2. The containment system of claim 1, wherein the access door comprises: a door body configured to cover the access port, wherein the sealable second airflow inlet is formed through the door body; anda collar extending from the door body and circumscribing the sealable second airflow inlet. 3. The containment system of claim 2, further comprising: a turning vane disposed in the collar and configured to redirect air passing through the collar. 4. The containment system of claim 2, wherein the access door further comprises: a lip coupled to the door body and configured to circumscribe the access port; anda sealing member affixed to a distal edge of the lip. 5. The containment system of claim 2, wherein the access port has an opening of at least 3 inches by 23 inches. 6. The containment system of claim 2, wherein the collar is configured to provide at least 400 cubic feet per minute of air therethrough. 7. The containment system of claim 1, wherein the housing comprises a pre-filter holder disposed in the upstream section. 8. The containment system of claim 7, wherein the access port is positioned to permit a pre-filter to be disposed through the access port and engaged with the pre-filter holder. 9. The containment system of claim 7, further comprising: an air distribution plate retrained in the pre-filter holder, the air distribution plate comprising a plurality of apertures sized to create a gradient of flow resistance across the air distribution plate. 10. The air distribution plate of claim 9, where in the plurality of apertures comprises: a first plurality of apertures located at the first edge; anda second plurality of apertures located at the second edge, wherein a diameter of the first plurality of apertures is greater than a diameter of the second plurality of apertures. 11. The air distribution plate of claim 9, where in the plurality of apertures have a greater density at the first edge than the second edge. 12. An air filter access door comprising: a door body configured to close a containment housing access port, the door body operable to place the housing access port in an open state and a closed state; anda sealable airflow inlet formed through the door body, wherein the containment housing access port is sealed when the door body is in a closed state and the sealable airflow inlet is in a sealed state, and wherein the containment housing access port is unsealed when the access door is in the closed state and the airflow inlet is in an unsealed state. 13. The air filter access door of claim 12, further comprising: a collar extending from the door body and circumscribing the sealable airflow inlet. 14. The air filter access door of claim 13, further comprising: a lip coupled to the door body; anda sealing member affixed to a distal edge of the lip. 15. The air filter access door of claim 13, further comprising: a turning vane disposed in the collar and configured to redirect air passing through the collar. 16. A method for testing a filter disposed in a containment housing, comprising: closing first airflow inlet disposed upstream of the containment housing;flowing air into the containment housing through a sealable second airflow inlet formed through an access door positioned in a closed state and sealed to the containment housing, and through a filter disposed in the containment housing; andtesting the filter by sampling the air flowing through the filter. 17. The method of claim 16, wherein flowing air into the containment housing comprises: redirecting air passing through the access door into the containment housing to a direction 15 to 90 degrees from a centerline of the second airflow inlet. 18. The method of claim 16 further comprising: closing the second airflow inlet; andflowing air through the first airflow inlet and through the filter. 19. The method of claim 18, wherein flowing air into the containment housing through the sealable second airflow inlet comprises: flowing air through an air distribution plate having a flow resistance gradient across the air distribution plate. 20. The method of claim 19, wherein flowing air across the air distribution plate comprises: creating uniform velocity profile of air exiting the air distribution plate.
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