Brickless stove

A wood burning stove (10) having an enclosure defining an area for burning wood therein beneath baffle means (76) formed in said enclosure, said enclosure having a curved surface having a front closure member (14) and a rear closure member (16) sealedly attached thereto, and suitable legs (26, 66) attached to said stove (10) for supporting said stove,

• exhaust vent means (74) formed adjacent said rear closure member (16) in the top of said enclosure for attachment to a flue pipe, said rear closure member (16) having the general shape of a saucer and being in the form of a heat exchanger (88) for heating air contained therein, secondary air inlet and control means (25, 21, 24) in said stove (10) for admitting a predetermined quantity of air into said stove (10),
• at least one preheat heat exchanger (86) associated with said draft inlet and control means (25, 21, 24) to lead air from said draft control means (24, 25, 21) through said stove (10) to said heat exchanger (88) to extract heat from said enclosure,
• outlet port means (90) on said heat exchanger (88) for discharging heated air from said heat exchanger (88) into said enclosure.

A heat exchanger (88) for extracting heat from burning fuel in a stove (10) comprising spaced inner heat exchanger wall (50) and outer heat exchanger wall 52, said inner heat exchanger wall (50) having a convex surface (50) exposed to the burning fuel,

• said heat exchanger (88) having an inlet means (87) and air exhaust means (90) to permit air to flow through said heat exchanger 88 by convection;
• air dispersion means (56,58) formed Within said heat exchanger (88) to force air passing therethrough to pass through a series of interstices (100) within said heat exchanger (88) to maximize surface contact with said air during passage through said heat exchanger (88).

A heat exchanger (88) for extracting heat from burning fuel in a high efficiency stove (10) comprising a chamber (17) being Installed in one of the walls of said stove (10), said chamber (17) having a convex surface (50) exposed to burning fuel

• said heat exchanger (68) having an inlet means (87), and air exhaust means (90) to permit air to flow through said heat exchanger (88) by convection
• air dispersion means (56, 58) formed within said heat exchanger (88) to force air passing therethrough to pass through a series of interstices (100) within said chamber (17) to maximize surface contact with said air during passage through said chamber (17)
• wherein the velocity of air passing between said air inlet means (87) and air exhaust means (90, 92) within said heat exchanger (88) is a minimum of the center of said heat exchanger 88.

A heat exchanger (88) for the production of hot invitiated air in a high efficiency wood burning stove (10) in which said stove (10) comprises a cylindraceous combustion chamber in which said heat exchanger (88) forms part of said combustion chamber (82), said heat exchanger (88) being formed by a pair of dished plates (50, 52) formed into a convex arcuate surface of revolution joined together at the periphery of the plates (50, 52) to produce a chamber 17 so that said heat exchanger (50, 52) presents a convex surface to said combustion chamber (82),

• at least one inlet port (87) formed near the bottom of said heat exchanger (88) to permit invitiated air to enter said heat exchanger (88),
• at least one exit port (90) located above said inlet port (87) to permit heat invitiated air to be delivered to predetermined locations in said combustion chamber (82).

A wood burning stove having a sheet metal enclosure with an inlet and outlet where an interior surface of said sheet metal enclosure exposed to combustion is coated with glass material having a co-efficient of expansion substantially the same as the co-efficient of expansion of said sheet metal enclosure.