US 4,358,052 AGranted

Hot-water central heating system

OwnerDieter J. Leinenbachinventor

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Abstract

A hot water central heating system with a conduit system conducting a water flow and comprising intercommunicating pipes which intersect in decks and substantially fills the cross-section of the combustion chamber of a boiler and offers a large flow resistance to the firing gases in order to lower the exhaust gas temperature. A pressure limiting valve disposed upstream of the circulating pump protects the hot water conduit system against excessive pressure resulting from the formation of vapor. Corrosion-resistant lining of the exhaust gas chimney by means of an internally enamelled pipe is recommended owing to the low exhaust gas temperature which can be reached. Fuel is continuously supplied to the burner, the fuel flow rate being modulated by a controller responsive to heat sensor means placed in the hot-water outlet of the boiler.

Claims11

Dependent claims

A hot-water central heating system including a boiler, a combustion chamber within the boiler, a burner beneath the combustion chamber for producing hot firing gases, and a hot-water conduit system disposed above the burner, the conduit system being provided with a cold-water inflow and a hot-water outflow, and further comprising:

(a) a plurality of superjacent decks of conduits, said conduits of each deck being in parallel relationship within each deck, the conduits of one deck being oriented substantially crosswise with respect to the immediately adjacent decks;
(b) an adjustable heat-sensitive means being disposed in the hot-water outflow for monitoring the hot-water temperature,
(c) means in the fuel supply for controlling the flow rate of fuel to be fed in a modulated manner into the burner;
and
(d) a signal line connected to said heat-sensitive means and said controlling means, whereby said controlling means continuously supplies fuel at a flow rate responsive to said heat-sensitive means in accordance with the desired hot-water temperature to which said heat-sensitive means is set, so the exhaust gases leaving the hot-water conduit system are cooled to a temperature of less than about 400 K. (approximately 130.degree. C.).

2 more elements

Dependencies are inferred from the claim text.