US 5,553,604 AGranted

Space heating system, heater, and combustion chamber

OwnerMartin Freiinventor

Life of this patent

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Abstract

The space heating system has a stove (1, 2) with a sealed combustion chamber (3); air is heated in the stove in a heat exchanger (12) therein, and heated air is conducted through hollow blocks (80) of chamotte arranged, for example, as heating panels, heated walls, benches, floors or the like. The hollow blocks are formed, internally, with projections or obstructions (83) to increase heat transfer, and may be faced at the outside with decorative tiles. To seal the combustion chamber, a vertically movable panel, typically of fire-resistant glass, is slidably located in front of a fuel inlet opening (7). In operation, the panel is sealed, so that the combustion chamber (3) will receive air only under controlled conditions, in two air paths; a primary air path supplies air to a narrow space (22) below a fuel support grate (25), after being preheated by passing around an ash receiver (18); and a secondary air flow, passed through ducts (30) within the combustion chamber, and ejecting air towards the panel. Typical fuels are wood or coal.

Claims19

Dependent claims

A space heating system comprising

a space heater (1, 1') having
a housing (2) including a combustion chamber (3) and a front wall formed with a fuel inlet opening (7) leading to the combustion chamber (3);
a movable panel element (17) selectively covering said inlet opening, or leaving it accessible for introduction of fuel;
a heat exchanger (12) located above the combustion chamber (3) and having exchange heat inlet means (5) leading to the heat exchanger (12) and exchanged heat outlet means (6) for conducting heated air away from the heat exchanger;
combustion air inlet means (10, 19) for controlled supply of combustion air to the combustion chamber (3);
air duct means (23, 24) coupled to the air inlet means (10, 19) to supply air from the air inlet means to the combustion chamber (3);
a panel retention frame system (4, 42) to retain said panel element (17) for vertical sliding movement between a covered position covering said opening (7), and an open position,
a plurality of hollow heat storage and radiating blocks (80, 80a . . .) pneumatically coupled to the heated air outlet means (6), said blocks being coupled together and connected for continuous heated air flow through said coupled hollow blocks, said coupled blocks forming a heatable wall or heat panel structure;
wherein said hollow heat storage blocks 180, 80a . . .) are of essentially rectangular, optionally square outline, and are formed of dual mirror-symmetrical matching block elements, rigidly connected together;
and
wherein the surfaces of said hollow blocks defining the interior hollow space are formed with interior air flow obstructions (86), integral with the material of the respective block element, to generate turbulence in the heated air flow passing through the interior space.

8 more elements

In a space heating system,

a space heater (1, 1') comprising
a housing (2) including a combustion chamber (3) and a front wall formed with a fuel inlet opening (7) leading to the combustion chamber (3);
a movable panel element (17) selectively covering said inlet opening, or leaving it accessible for introduction of fuel;
a heat exchanger (12) located above the combustion chamber (3) and having exchange heat inlet means (5) leading to the heat exchanger (12) and exchanged heat outlet means (6) for conducting heated air away from the heat exchanger;
combustion air inlet means (10, 19) for controlled supply of combustion air to the combustion chamber (3);
air duct means (23, 24) coupled to the air inlet means (10, 19) to supply air from the air inlet means to the combustion chamber (3);
wherein said air duct means (23, 24) include
a primary air duct system (24) and a secondary air duct system (23),
said secondary air duct system (23) comprising essentially vertically positioned air conduits (30), which conduits are located within the combustion chamber (30);
a fuel support grate (25) located at the bottom of the combustion chamber;
an ash receiver (18);
wherein the primary air duct means (24) communicates with a prewarming space (21) surrounding the ash receiver;
and
a frame (16) surrounding the ash receiver (18) at an upper region thereof adjacent the grate (25) and defining an air flow space (22) between the grate and the upper region of the ash receiver, said air flow space (22) being in air communication with said prewarming space (21) and defining an essentially horizontal flat areal zone for passage of secondary air in the secondary air duct system upwardly through the grate (25).

11 more elements

In a space heating system,

a space heater (1, 1') comprising
a housing (2) including a combustion chamber (3) and a front wall formed with a fuel inlet opening (7) leading to the combustion chamber (3);
a movable panel element (17) selectively covering said inlet opening, or leaving it accessible for introduction of fuel;
a heat exchanger (12) located above the combustion chamber (3) and having exchange heat inlet means (5) leading to the heat exchanger (12) and exchanged heat outlet means (6) for conducting heated air away from the heat exchanger;
combustion air inlet means (10, 19) for controlled supply of combustion air to the combustion chamber (3);
air duct means (23, 24) coupled to the air inlet means (10, 19) to supply air from the air inlet means to the combustion chamber (3);
wherein said panel frame system comprises a fixed frame portion (42) secured to the housing and a movable frame portion (4) separable from the fixed frame portion and retaining said panel;
engagement means (52, 60) operatively coupled to the flat side of the panel (17) to selectively move the flat side of the panel in sealing position against the fixed frame portion (42) and seal the combustion chamber against uncontrolled ingress of air upon operation of said engagement means;
and
a release means (38) operatively engageable with the panel (17) to release the panel from sealed position upon release of the panel by releasing operation of the engagement means;
and
wherein said release means (38) comprise a plurality of compression springs (38) positioned to bias the panel element away from the stationary frame portion (42) to permit free sliding movement of said movable frame portion (4) and hence of said panel element (17).

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/227,602Filed 14 Apr 1994
Granted: 10 Sep 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F24B 7/00
Stoves, ranges or flue-gas ducts, with additional provisions for convection heating
F24B 1/187
With air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion: condition responsive…
F24B 5/026
Combustion-air circulation: supply of primary and secondary air for combustion
F24B 13/004
Details solely applicable to stoves or ranges burning solid fuels: doors specially adapted for stoves or ranges