Patent ID: 11859832
Assignee: 2078095 ONTARIO LIMITED
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A gray water heat recovery apparatus comprising:
a housing assembly that includes a one-piece cylindrical gray water shell, said shell having a first gray water pass and a second gray water pass;
the first and second gray water passes having respective top and bottom ends;
the first and second gray water passes being in fluid connection in series;
said first and second gray water passes combining to define a gravity driven gray water discharge path;
a first tube bundle being removably installed in said second gray water pass by axial insertion at said top end of said second gray water pass;
a second tube bundle being removably installed in said first gray water pass by axial insertion at said top end of said first gray water pass;
said first and second tube bundles being pressurized fresh water tube bundles;
each of said first and second tube bundles having an inlet manifold; a return manifold; an array of heat exchanger tubes extending between and in communication with said inlet manifold and said return manifold; and a return;
said first and second tube bundles, when installed, being connected in series and in counterfiow to said first and second gray water passes of said shell;
said top end of said shell having at least a first divider between said first gray water pass and said second gray water pass;
said shell having an upstanding peripheral wall;
said upstanding peripheral wall having first and second gray water port fittings mounted therein, one of said fittings being a gray water inlet in fluid communication to feed said first and second gray water passes in series, and the other of said fittings being a gray water outlet at which gray water exits from said shell after having passed through said first and second gray water passes in series;
said housing assembly including a top end cover that closes said top end of said first and second passes; and
said top end cover, when installed, capturing said first and second gray water port fittings in said upstanding peripheral wall of said gray water shell.