JPS55146351A - Hot air generator - Google Patents

Abstract

PURPOSE: To perform an efficient heating to the surrounding air and at the same time to prevent an overheating and a burn loss at the convection heat transfer part by a method wherein the surrounding air is transmitted through the flow regulation nozzle toward the recessed convection heat transmitting part in the furnace and further heated by a radiation heat in the outer circumferential wall of the furnace.

CONSTITUTION: When the air blower 6 is driven in case that the hot air generator is installed in a leaf tobacco drying machine etc., the surrounding air is suctioned from the surrounding air intake port 1 into the casing a and then flowed to the convection heat transmitting part 2a of the furnace 2 through the flow regulation nozzle 5. The surrounding air blown into the convection heat transmitting part 2a is blown into the discharge passage 9 as shown by the arrow via radiation heating passage 7, further blown into the leaf tobacco drying chamber. The furnace 2 performs a radiation heat transmitting at its outer circumferential wall under a combustion of the burner 4, performs a convection heat transmitting at the convection heat transmitting part 2a, the waste combustion gas which has completed this heat transmitting process is discharged from the chineey 3. Under this arrangement, it is possible to imptove a thermal efficiency and to cause the surrounding air to be blown to the convection heat transmitting part, so that it is further possible to prevent a burn loss due to overheating.

COPYRIGHT: (C)1980,JPO&Japio