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US 8,267,116 B2Granted
Strainer and anti-backflow device for compressors
AssigneeJohnson Controls Technology Company
InventorsPaul A. Huber, Paul Nemit, Jr.
Life of this patent
Estimating the term…
Abstract
A backflow and strainer device is presented. The device is a unitary unit that prevents backflow of fluid gas in a compressor and prevents dirt particles and debris from entering the compressor, thereby damaging the components. A valve mechanism moves between an open position and a closed position to either allow or prevent fluid gas from flowing into the compressor. A mesh portion is disposed in the device to trap all dirt particles and debris to prevent them from entering the compressor. The valve mechanism responds to the higher and lower pressures associated with the operation and shutdown of compressors.
Claims14
An anti-backflow system for a compressor comprising:
- a hollow, cylindrical body;
- a flanged ring connected to an end of the cylindrical body, the flanged ring extending from the cylindrical body;
- a conical portion having a plurality of openings and being configured with a larger diameter end and a smaller diameter end, the smaller diameter end of the conical portion being adjacent to the end of the cylindrical body having the flanged ring, the larger diameter end of the conical portion being attached to the cylindrical body adjacent to an end of the cylindrical body opposite the flanged ring;
- a slide stem secured to the smaller diameter end of the conical portion and extending from the smaller diameter end of the conical portion toward the larger diameter end of the conical portion;
- a conical poppet being mounted on the slide stem, the conical poppet being movable between a first position to prevent fluid flow through the cylindrical body and a second position to permit fluid flow through the cylindrical body;
- a stop, the stop being configured to limit the conical poppet to movement between the first position and the second position;
- a strainer mechanism disposed adjacent the cylindrical body and being configured to trap dirt particles and debris to prevent the dirt particles and debris from passing through the cylindrical body;
- and
- wherein the conical poppet moves along the slide stem between the first position and second position using only fluid flow entering the cylindrical body and the conical poppet is moved into one of the first position or the second position in response to the direction of fluid entering the cylindrical body.
6 more elements
A system comprising:
- a housing, the housing having an inlet connection and an outlet connection;
- a compression device disposed in the housing, the compression device configured to increase a pressure of a fluid flowing between the inlet connection and the outlet connection;
- a flow control device disposed adjacent the inlet connection, the flow control device comprising:
- a hollow, cylindrical body;
- a flanged ring connected to an end of the cylindrical body, the flanged ring extending from the cylindrical body and connected to the inlet connection;
- a conical portion having a plurality of openings and being configured with a larger diameter end and a smaller diameter end, the smaller diameter end of the conical portion being adjacent to the end of the cylindrical body having the flanged ring, the larger diameter end of the conical portion being attached to the cylindrical body adjacent to an end of the cylindrical body opposite the flanged ring;
- a slide stem secured to the smaller diameter end of the conical portion and extending from the smaller diameter end of the conical portion toward the larger diameter end of the conical portion;
- a conical poppet being mounted on the slide stem, the conical poppet being movable between a first position to prevent fluid flow through the cylindrical body and a second position to permit fluid flow through the cylindrical body;
- a strainer device disposed adjacent to cylindrical body and being configured to trap dirt particles and debris to prevent the dirt particles and debris from passing through the strainer device;
- and
- wherein the flow control device prevents the backflow of fluid through the housing by having the conical poppet move along the slide stem to the first position using only fluid flow entering the cylindrical body when the compression device is shut down.
8 more elements
Dependencies are inferred from the claim text.