Stoves and furnaces – Liquid heater – Fluid fuel burner for other than top-accessible vessel
Patent
1993-04-28
1994-06-07
Price, Carl D.
Stoves and furnaces
Liquid heater
Fluid fuel burner for other than top-accessible vessel
126344, 165135, 165176, F24H 100
Patent
active
053180070
ABSTRACT:
A swimming pool or spa heater unit having a heat exchanger manifold designed to permit the use of direct plastic piping connections to the manifold header. The manifold is principally characterized by a header end having an inlet port and outlet port located on a level below the manifold inlets and outlets communicating with the heat exchanger. The inverted arrangement of the header ports relative to the manifold inlets and outlets to the heat exchanger permits unreturned water in the unit heated by residual heat from the heater to form a temperature gradient therebetween which prevents the temperature of the water at the header connection from reaching a level incompatible with the use of direct plastic piping connections. The manifold is also integrally provided with weirs which serve to provide dry-fire protection for the heater.
REFERENCES:
patent: 320635 (1885-06-01), Daudt
patent: 3407805 (1968-10-01), Bougard
patent: 3741169 (1973-06-01), Johnson
patent: 3800748 (1974-04-01), Schindler et al.
patent: 4344386 (1982-08-01), Black
patent: 4561421 (1985-12-01), Hwang et al.
patent: 4738225 (1988-04-01), Joang
Hydrotech Chemical Corporation
Price Carl D.
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