Liquid heater assembly

The method of constructing a liquid heater in which heat is transferred to liquid flowing in a tubular member having a wall from a heat conductive member having at least one opening in which said tubular member is located comprising:

• providing said heat conductive member having at least one opening;
• inserting said tubular member into one of said at least one opening;
• and
• expanding said tubular member by forcing a fluid into the inside of said tubular member thereby causing said wall of said tubular member to be forced against the wall of said opening so as to insure a tight fit and facilitate greater heat transfer.

A liquid heater including a plurality of elongated tubular members, said tubular members having a selected outer configurated shape;

• an elongated heat conductive member having a central axis and a plurality of elongated openings having axes spaced about said central axis;
• said openings each having a shape generally conforming to said selected outer configurated shape of said tubular members and each receiving one of said tubular members, each of the walls of said openings being in close contact with the outer wall of said tubular member which extends therethrough;
• said tubular members being expanded outwardly of their axes against the walls of said openings by a probe to ensure a tight fit so as to facilitate greater heat transfer;
• an elongated heating element electrically isolated from said heat conductive member;
• and
• said heat conductive member being constructed of solid heat conductive material substantially encompassing the entire outer walls of said tubular member for conducting heat radiated from said heating element to said tubular members for heating water flowing through said tubular members.

A liquid heater including a plurality of elongated tubular members, said tubular members having a selected outer configured shaped;

• an elongated heat conductive member having a central axis and a plurality of elongated openings having axes spaced about said central axis;
• said openings each having a shape generally conforming to said selected outer configurated shape of said tubular members and each receiving one of said tubular members, each of the walls of said openings being in close contact with the outer wall of said tubular member which extends therethrough;
• said tubular members being expanded outwardly of their axes against the walls of said openings to ensure a tight fit so as to facilitate heat transfer;
• an elongated heating element electrically isolated from said heat conductive member;
• and
• said heat conductive member being constructed of solid heat conductive material substantially encompassing the entire outer walls of said tubular member for conducting heat radiated from said heating element to said tubular members for heating water flowing through said tubular members.