| CPC B60H 3/0658 (2013.01) [B01D 46/10 (2013.01); B01D 46/62 (2022.01); B01D 46/70 (2022.01); B60H 3/0633 (2013.01); B01D 2201/202 (2013.01); B01D 2279/40 (2013.01); B01D 2279/65 (2013.01)] | 20 Claims |
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1. A system for providing filtered air to an enclosed space, comprising:
a first air feed pump adapted to pull air from an exterior environment and push pressurized air through the system to the enclosed space;
a power source adapted to provide electrical power to the first air feed pump;
a first filter media positioned between the first air feed pump and the enclosed space, downstream of the first air feed pump, the first filter media adapted to provide coarse filtration of the pressurized air pumped from the first air feed pump through the first filter media;
a second filter media positioned between the first filter media and the enclosed space, downstream of the first filter media, the second filter media adapted to provide fine filtration of the pressurized air pumped from the first filter media through the second filter media;
a first control valve positioned between the first air feed pump and the first filter media, downstream of the first air feed pump, the first control valve being adapted to control the flow of pressurized air from the first air feed pump;
a first reversing control valve positioned between the second filter media and the enclosed space, a reverse air flow path extending between and interconnecting the first control valve to the first reversing control valve, and a second reverse control valve positioned between the first control valve and the first filter media, wherein:
the first control valve is selectively actuatable to divert pressurized air flow from the first air feed pump to the reverse air flow path;
the first reversing control valve is selectively actuatable to stop air flow to the enclosed space and divert air flow from the reverse air flow path through the second filter media and the first filter media; and
the second reverse control valve is selectively actuatable to divert pressurized air flow passing through the first filter media to the environment; and
wherein, when pressurized air flows through the first and second filter media from the reverse air flow path, the pressurized air dislodges particles captured by the first and second filter media and expels the particles dislodged from the first and second filter media out of the system to the exterior environment through the second reverse control valve.
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