Vessel assembly and related manufacturing method

A vessel assembly for a refrigeration system, said vessel assembly comprising:

• a vessel defining an interior cavity having at one end a top portion and at an opposite end an inside bottom portion;
• a closure member mounted to said top portion of said vessel, said closure member having a passage;
• and
• a flexible conduit assembly disposed within said interior cavity of said vessel, said flexible conduit assembly having one end mounted in said passage of said closure member and a distal portion opposite said one end, said distal portion of said flexible conduit assembly further having a filter member, said distal portion of said flexible conduit assembly being in direct contact with said inside bottom portion of said vessel;
• whereby regardless of dimensional variations of said flexible conduit assembly, said vessel, and said closure member, said distal portion of said flexible conduit assembly remains in contact with said inside bottom portion of said vessel.

An accumulator assembly for an automotive air-conditioning system, said accumulator assembly comprising:

• a generally cylindrical refrigerant vessel defining an interior cavity and having a longitudinal axis, said refrigerant vessel having a closure member mounted thereto for closing said refrigerant vessel, said closure member having an inner surface and an outlet therethrough, said refrigerant vessel having an inside bottom surface within said interior cavity, said refrigerant vessel having an inside longitudinal dimension defined by a distance between said inner surface of said closure member and said inside bottom surface;
• and
• an outlet tube assembly disposed within said interior cavity of said refrigerant vessel, said outlet tube assembly comprising a semi-rigid J-tube having one end connected to said closure member of said refrigerant vessel in fluid communication with said outlet, said semi-rigid J-tube further having a bight portion with a pickup filter attached thereto in fluid communication with said semi-rigid J-tube, whereby said accumulator assembly draws oil through said pickup filter and into said semi-rigid J-tube, said pickup filter being located against said inside bottom surface of said refrigerant vessel, said outlet tube assembly having a predetermined longitudinal dimension defined by the overall axial length from said one end to and including the axial length of said pickup filter;
• said outlet tube assembly being flexible so as to bend and take up any variation in length due to tolerance variations of said predetermined longitudinal dimension of said outlet tube assembly and said refrigerant vessel when said refrigerant vessel assembly is assembled so that said pickup filter maintains direct contact against said inside bottom surface of said refrigerant vessel regardless of dimensional tolerance variations of said outlet tube assembly, said refrigerant vessel, and said refrigerant closure member.

A method of manufacturing a vessel assembly, said method comprising the steps of:

• providing a vessel of generally cylindrical shape, said vessel defining an interior cavity and having an inside bottom surface;
• providing a closure member for closing said vessel, said closure member having an inner surface and at least one passage therethrough, said closure member defining an inside longitudinal dimension of said vessel between said inner surface of said closure member and said inside bottom surface of said vessel;
• providing a flexible conduit assembly for connecting to said closure member, said flexible conduit assembly comprising a flexible conduit with an upper end and a lower end approximately opposite said upper end, said flexible conduit assembly further having a filter at said lower end of said flexible conduit, said filter having a bottom, said flexible conduit assembly having a predetermined longitudinal dimension defined by the axial length from said upper end of said flexible conduit to said bottom of said filter;
• assembling said upper end of said flexible conduit assembly to said closure member;
• inserting the assembled closure member and flexible conduit assembly into said interior cavity of said vessel such that said filter locates against said inside bottom surface of said vessel;
• axially advancing the assembled closure member and flexible conduit assembly further into said vessel until a portion of said closure member abuts against a portion of said vessel, such that said flexible conduit assembly bends in compliance to maintain said filter located against said inside bottom surface of said vessel;
• and
• closing said vessel with said closure member, whereby said flexible conduit assembly flexes to take up the difference between said predetermined longitudinal dimension of said flexible conduit assembly and said inside longitudinal dimension of said vessel so that said filter maintains contact against said inside bottom surface of said vessel regardless of dimensional variations of said flexible conduit assembly, said vessel, and said closure member.