Refrigerant is controlled by primary and secondary metering by main control valves with connections to individual one pass heat transfer circuits. The connections from the main valve radially extend from the valve body. Needles contact upper edges of sloped seats in valve bodies. The needles have sl
Refrigerant is controlled by primary and secondary metering by main control valves with connections to individual one pass heat transfer circuits. The connections from the main valve radially extend from the valve body. Needles contact upper edges of sloped seats in valve bodies. The needles have sloped conical surfaces which seal the valves and cylindrical bases which seal orifices leading to radially extending individual circuit connectors. Moving the needle opens the valve, metering flow between the cone and the seat and opening and metering flow to partially opened orifices. The needle shape directs the flow through the orifices which are narrow for fluids and wide for vapors. An internal channel in the valve body is opened when the needle is moved to equalize pressure on the needle and the base.
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1. Apparatus comprising: a refrigerant control valve further comprisinga valve body having a bore,a refrigerant pipe header on a first longitudinal end of the valve body,a first metering conical valve seat in the valve body,a plurality of axially elongated orifices extending through the valve body,a
1. Apparatus comprising: a refrigerant control valve further comprisinga valve body having a bore,a refrigerant pipe header on a first longitudinal end of the valve body,a first metering conical valve seat in the valve body,a plurality of axially elongated orifices extending through the valve body,a needle in the valve body,a drive mounted in a second end of the valve body and connected to the needle for moving the needle axially in the valve body,wherein the needle is adapted for contacting the first metering valve seat for sealing the valve body and moving away from the valve seat for metering refrigerant flow through a first metering valve between the needle and the valve seat,the needle moving in the bore along the axially elongated orifices for selectively partially opening the orifices for a second metering of the refrigerant flowing through the orifices, and for fully opening the orifices, wherein the valve seat and the needle have distinct slopes for sealing the valve seat with the needle at one longitudinal end of the valve seat, wherein the needle further comprises a cone and a base, and wherein the cone contacts an upper end of the valve seat for closing the refrigerant control valve and the base seals the orifices, further comprising at least one equalizing longitudinal channel in the valve body extending from below the upper end of the valve seat to below the base for equalizing pressure of refrigerant above and below the cone when the cone moves away from the valve seat. 2. The apparatus of claim 1, wherein the axially elongated orifices are wide with respect to longitudinal surfaces of the valve body between the longitudinal orifices for controlling flow of refrigerant through the orifices. 3. The apparatus of claim 2, wherein the valve body has longitudinally extending wall spaces between the wide orifices, and wherein the wall spaces are thinner than the long and wide orifices. 4. The apparatus of claim 1, wherein the axially elongated orifices are narrow with respect to longitudinal surfaces of the valve body between the axially elongated orifices for controlling flow of liquid refrigerant through the thin and narrow orifices. 5. The apparatus of claim 4, wherein the valve body has longitudinally extending wall spaces between the narrow orifices, and wherein the wall spaces are wider than the thin and narrow orifices. 6. The apparatus of claim 1, wherein the orifices number 20 or more. 7. The apparatus of claim 6, wherein the orifices are of a number greater than 20 or more. 8. The apparatus of claim 6, wherein the orifices are of a number greater than 30 or more. 9. The apparatus of claim 6, wherein the orifices are of a number greater than 40 or more. 10. Apparatus comprising: a refrigerant control valve further comprisinga valve body having a bore,a refrigerant pipe header on a first longitudinal end of the valve body,a first metering conical valve seat in the valve body,a plurality of axially elongated orifices extending through the valve body,a needle in the valve body,a drive mounted in a second end of the valve body and connected to the needle for moving the needle axially in the valve body,wherein the needle is adapted for contacting the first metering valve seat for sealing the valve body and moving away from the valve seat for metering refrigerant flow through a first metering valve between the needle and the valve seat,the needle moving in the bore along the axially elongated orifices for selectively partially opening the orifices for a second metering of the refrigerant flowing through the orifices, and for fully opening the orifices, further comprising connectors extending radially outward from the valve body for connecting the orifices to individual heat exchange circuits. 11. The apparatus of claim 10, wherein the connectors extend along the orifices and angularly away from the orifices to cross-sectional areas equal to cross-sectional areas of the orifices. 12. The apparatus of claim 10, wherein the valve seat and the needle have distinct slopes for sealing the valve seat with the needle at one longitudinal end of the valve seat. 13. The apparatus of claim 12, wherein the needle further comprises a cone and a base, and wherein the cone contacts an upper end of the valve seat for closing the refrigerant control valve and the base seals the orifices. 14. The apparatus of claim 13, further comprising at least one equalizing longitudinal channel in the valve body extending from below the upper end of the valve seat to below the base for equalizing pressure of refrigerant above and below the cone when the cone moves away from the valve seat.
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이 특허에 인용된 특허 (14)
Haunhorst, Gregory A.; Gifford, Keith H.; Field, John C., Access port (suitable for fluid/refrigerant system).
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