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An air distribution system for electronic components utilizes an air supply unit with a silencer unit. The silencer unit attenuates sound associated with the air unit blowers with inlet and discharge silencers. The blowers have check valves which provide for isolating each blower for continued opera

An air distribution system for electronic components utilizes an air supply unit with a silencer unit. The silencer unit attenuates sound associated with the air unit blowers with inlet and discharge silencers. The blowers have check valves which provide for isolating each blower for continued operation even with one blower. The cooling air is transported to a circuit board module stack from the blowers through ducts and a bank of rod valves. The valves allow maximum air flow to the modules with minimum resistance. The ducts have a flexible portion which have quick disconnects and act to isolate the modules from vibrations and static. The modules utilize channels in an air plate with different sized baffles to provide even distribution of cooling air to the printed circuit boards.

대표청구항 ▼

1. A cooling apparatus for electrical components, comprising: electrical modules including a plurality of circuit board modules; ventilating means for providing cooling air flow; duct means connected to the ventilating means for directing cooling air from the ventilating means to the circuit bo

1. A cooling apparatus for electrical components, comprising: electrical modules including a plurality of circuit board modules; ventilating means for providing cooling air flow; duct means connected to the ventilating means for directing cooling air from the ventilating means to the circuit board modules comprising a plurality of ducts, wherein each duct leads to an associated circuit board module; valving means comprising a plurality of rod valves, wherein a rod valve is disposed in each of the duct means for controlling air flow to the electrical module; and switch means for controlling power to the electrical modules, wherein each rod valve includes and actuates a respective switch of said switch means to an associated electrical module. 2. A cooling apparatus according to claim 1, wherein the valving means comprise a plurality of rod valves, each rod valve comprising a cylindrical valve body housing a rotatable rod, the valve body having opposed orifices extending along a substantial length of the body and the rod having an orifice extending therethrough along its side; wherein the rod is rotatable relative to the body to align the orifices of the rod and the body to open and close the valve. 3. A cooling apparatus according to claim 1, wherein the ventilation means comprises at least one blower, each blower having an associated pair of check valves upstream and downstream of the blower for isolating the blower. 4. A cooling apparatus according to claim 1, further comprising silencing means disposed in a portion of the duct means downstream from the ventilating means. 5. A cooling apparatus according to claim 4, wherein the silencing means comprise a silencer body having a series of chambers and at least one flow choke. 6. A cooling apparatus according to claim 5, wherein the silencing means further comprises a second silencer box following the ventilating mans in the air stream. 7. A cooling apparatus according to claim 1, wherein the duct means comprise riser ducts having a flexing portion isolating circuit board modules from vibration of the ventilating means. 8. A cooling apparatus according to claim 1, wherein the valving means comprises a plurality of rod valves, each rod valve having a rod body with an orifice extending along the rod, the rods inserting into a housing having a plurality of orifices aligned with the orifices of the rod bodies, and wherein the rod valves are mounted in the housing disposed in alternating rows, wherein the rod valves in a first row are offset from the rod valves in a second row. 9. A cooling apparatus according to claim 8, wherein each rod valve is rotatably mounted in the housing. 10. A cooling apparatus according to claim 8, wherein each rod valve comprises a rod and housing, wherein the rod extends into the housing and wherein the housing has an orifice positioned along the axis of the rods. 11. A cooling apparatus according to claim 1, wherein the electrical modules comprise circuit board modules, wherein each module has a plurality of channels extending through the module and a plurality of orifices spaced along each channel, wherein baffles are positioned along a portion of the channel for directing flow into associated orifices. 12. A cooling apparatus according to claim 11, wherein the baffler increase in area along the channel. 13. A cooling apparatus according to claim 8, further comprising a rectangular flexible duct extending from the one of the rod valves to an associated circuit board module. 14. A cooling apparatus according to claim 13, wherein he flexible duct has a quick disconnect between a valve and an associated circuit board module. 15. A cooling apparatus according to claim 1, wherein the valving means comprise a check valve for isolating flow, including: a valve body; a gate; a hinge connecting the gate to the valve body; wherein the gate pivots about the hinge, and the gate is weighted so that the force of the flow pushes the gate upward to an open position whereas the center of gravity of the gate approaches a position over a center point of the hinge; and stop means for preventing the gate from swinging open with its center of gravity passing over the center of the hinge. 16. A cooling apparatus for electrical components, comprising: a plurality of circuit board modules; ventilating means for providing cooling air flow; a plurality of rod valves, each rod valve having a rod body with an orifice extending along the rod, the rods inserting into a housing having a plurality of orifices aligned with the orifices of the rod bodies; duct means connected to the ventilating means for directing cooling air from the ventilating means to the circuit board modules, wherein the rod valves are disposed in the duct means, and wherein the duct means includes a plurality of flexible rectangular ducts, each duct connecting an associated rod valve to an associated circuit board module; and switch means for controlling power to the circuit board modules, each rod valve having an associated switch, wherein in an open valve position, the associated switch is closed, and wherein in a closed valve position, the associated switch is open. 17. A cooling apparatus according to claim 16, further comprising a plurality of channels extending through each circuit board module and a plurality of orifices spaced along each channel, wherein baffles are positioned along a portion of the channel for directing flow into associated orifices. 18. A cooling apparatus according to claim 16, wherein the rod valves are mounted in the orifices disposed in alternating rows, wherein the rod valves in a first row are offset from the rod valves in a second row.