Patent ID: 9395004
Filing Date: 2016-07-19
CPC Classification: F16K,F25B,Y10T

Claim Text:
1. Apparatus comprising: a refrigerant control valve further comprising a 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.