Charge valve in a high pressure air conditioning system
AssigneeVisteon Global Technologies, Inc.
InventorsFred G. Schroeder, Eric W. Kesler, Zhongping Zeng
Life of this patent
Estimating the term…
Abstract
A service valve for a CO2 refrigerant based air conditioning system in a vehicle. The service valve includes a dynamic seal that is opened and closed during servicing of the air conditioning system. The dynamic seal provides for good overall sealing as well as good permeation resistance.
Claims20
A service valve for an air conditioning system adapted to selectively connect pressurized refrigerant within a cavity of the air conditioning system to a service tool, the service valve comprising:
- a valve body defining a valve bore having a first end exposed to the cavity and a second end adapted for operatively engaging the service tool, with the bore including a dynamic valve seating surface;
- a valve pin assembly, mounted and slidable within the valve bore between an open position and a closed position, with the valve pin assembly including a dynamic seal portion which is made of a thin metal layer and a first, relatively thinner, elastomeric material layer covering the metal layer that is substantially softer than the metal layer, and with the dynamic seal portion sealingly engagable to the dynamic valve seating surface through surface contact with the elastomeric layer when the valve pin assembly is in the closed position;
- and
- a biaser that contacts the valve pin assembly and biases the valve pin assembly toward the closed position.
A service valve for an air conditioning system adapted to selectively connect pressurized refrigerant within a cavity of the air conditioning system to a service tool, the service valve comprising:
- a valve body defining a valve bore having a first end exposed to the cavity and a second end adapted for operatively engaging the service tool, with the bore including a dynamic valve seating surface;
- a valve pin assembly, mounted and slidable within the valve bore between an open position and a closed position, with the valve pin assembly including a dynamic seal portion, with one of the dynamic valve seating surface and the dynamic seal portion made of a metal layer and a relatively thinner, elastomeric layer covering the metal layer that is substantially softer than the metal layer, such that the dynamic seal portion is sealingly engagable to the dynamic valve seating surface through surface contact with the elastomeric layer;
- and
- a biaser that contacts the valve pin assembly and biases the valve pin assembly toward the closed position.
A service valve for an air conditioning system adapted to selectively connect pressurized refrigerant within a cavity of the air conditioning system to a service tool, the service valve comprising:
- a valve body defining a valve bore having a first end exposed to the cavity and a second end adapted for operatively engaging the service tool, with the bore including a dynamic valve seating surface;
- a valve pin assembly, mounted and slidable within the valve bore between an open position and a closed position, with the valve pin assembly including a dynamic seal portion which is made of a thin metal layer and a first, relatively thinner, elastomeric material layer covering the metal layer that is substantially softer than the metal layer, and with the dynamic seal portion sealingly engagable to the dynamic valve seating surface through surface contact with the elastomeric layer when the valve pin assembly is in the closed position;
- a biaser that contacts the valve pin assembly and biases the valve pin assembly toward the closed position;
- and
- an adapter having a refrigerant bore, and an adapter bore extending between the refrigerant bore at a first end and a second end adapted for receiving the service tool, and with the adapter bore including a static seal seating surface;
- and the valve body threadably mounting within the adapter bore and including a static seal surface that sealingly engages the static seal seating surface.
Dependencies are inferred from the claim text.