초록 ▼

A compact high efficient air heater providing improved comfort regulation. The air heater includes a cross-flow type heat exchanger formed from a plurality of stacked corrugated plates which define a plurality of alternating flue gas passages and air passages, and which include a plurality of modifi

A compact high efficient air heater providing improved comfort regulation. The air heater includes a cross-flow type heat exchanger formed from a plurality of stacked corrugated plates which define a plurality of alternating flue gas passages and air passages, and which include a plurality of modified air passages which provide increased air flow through the heat exchanger along the flue gas inlet side whereby increased heat transfer along the flue gas inlet side is accomplished. The air heater also includes a plurality of bypass channels which direct air flow across at least one surface of the combustion chamber to remove heat from the combustion chamber housing, to lower the temperature of the flue gases entering the heat exchanger, and to reduce the temperature gradient at the air outlet side of the heat exchanger.

대표청구항 ▼

[ What is claimed is:] [1.]1. An air heater, comprising:a burner for burning a combustible fuel to provide flue gases;a combustion chamber surrounding said burner;a heat exchanger defining a plurality of flue gas passages and air passages and further defining an air inlet side, an air outlet side, a

[ What is claimed is:] [1.]1. An air heater, comprising:a burner for burning a combustible fuel to provide flue gases;a combustion chamber surrounding said burner;a heat exchanger defining a plurality of flue gas passages and air passages and further defining an air inlet side, an air outlet side, a flue gas inlet side and a flue gas outlet side, and wherein said combustion chamber communicates with said flue gas inlet side of said heat exchanger to direct said flue gases through said flue passages;at least one bypass channel which directs air flow across at least one surface of said combustion chamber to remove heat from said surface; anda bypass control device for regulating at least one of the amount of air flow through said bypass channel and the direction of air flow through said bypass channel.