| 摘要 |
A bi-directional filter/drier for use in a heat pump refrigerant system or the like. The filter/drier includes a cylindric filter/drier element fitted within a housing and having an axial bore therethrough. The housing has an inlet/outlet at each end thereof for connection to the refrigerant system of the heat pump for selective bi-directional flow of refrigerant therethrough. A valve assembly is provided in the housing at each end of the filter/drier element. Each valve assembly includes a flapper valve and an outlet popet valve with the flapper valves permitting refrigerant to flow from a respective inlet/outlet functioning as an inlet to the exterior of filter/drier unit and with the outlet valves permitting the refrigerant to flow from the interior bore of the filter/drier element to a respective inlet/outlet which functions as an outlet so that no matter which direction refrigerant flows through the housing, the refrigerant at all times flows from the exterior to the interior of the filter/drier element. Specifically, this invention relates to an improved flapper valve which is positively held closed either by means of a spring or by a magnet.
|
