JPH0619933Y2 - Hot air heater - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a hot air heater that burns liquid fuel for heating.

(B) Prior art As is disclosed in Japanese Utility Model Laid-Open No. 57-16052, the conventional hot air heater forces the burner body to prevent other equipment from being heated by radiant heat from the burner body. Although the air to be cooled is used as the secondary air of the combustion flame, in that case, there was a drawback that the combustion flame was not uniformly formed due to the fluctuation of the secondary air.

(C) Purpose The present invention has been made to eliminate the above-mentioned drawbacks.

(D) Configuration According to the present invention, a hot air heater including a burner body, a combustion tube connected to the burner body, and a blower fan that blows hot exhaust gas generated by combustion in the burner body into the room. In the burner body, the burner body is formed of a bottomed cylindrical first heat shield plate provided on the outer periphery of the burner body, and a second heat shield plate provided on the outer periphery of the first heat shield plate. The cooling air passage is surrounded by a donut-shaped cooling air passage, and the cooling air passage is provided with an inlet for letting in a part of the air blown by the blowing fan. This is a configuration in which an outlet is provided.

(E) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view in which a part of a warm air heater according to the present invention is cut away,
(1) is a main body, the main body (1) is provided with a hot air outlet (2) and a see-through port (3), and further, a top plate (4) is placed.

A burner stand (5) is erected in the main body (1), and a bottomed cylindrical heat shield plate (first heat shield plate) surrounding the burner body (6) on the burner stand (5) ( 7) is provided, the side of the heat shield plate (7) is covered with a heat shield plate (second heat shield plate) (8), and the heat shield plate (7)
The heat shield plate (8) and the heat shield plate (8) form a donut-shaped cooling air passage (9). (10) and (11) are inlets and inlets formed in the flat peripheral portion (12) of the heat shield plate (7), respectively, by the blower fan (13) attached to the back surface of the main body (1). A part of the blown air is made to flow in and out and is made to flow to the cooling air passage (9). In addition, (1
4) is an air duct casing for guiding the air blown by the blower fan (13) to the hot air outlet (2), and (15) is a vaporization chamber that penetrates the heat shield (7).
(16) is a ventilation nozzle, (17) is a refueling nozzle arranged in the ventilation nozzle (15), (18) is a refueling pump, (19) is a ventilation device, and (20) is a ventilation pipe. .

Next, a description will be given based on the cross-sectional view of the warm air heater according to the present invention in FIG. A combustion cylinder is installed in the flat peripheral portion (12) of the heat shield plate (7).
(21) is placed, a red hot plate (22) is arranged in the combustion cylinder (21), and a flame see-through glass (23) is attached at a position facing the see-through port (3). There is. Incidentally, (24) is a blower fan cover, (25) is a vaporization heater, and (26) is a burner head.

The combustion operation of the warm air heater according to the present invention having the above structure is performed as follows. When the vaporization heater (25) heats the burner body (6) and the temperature of the burner body (6) rises to a temperature sufficient to vaporize the liquid fuel sprayed from the refueling nozzle (17), the refueling pump (18), blower The device (19) starts to operate, and the atomized liquid fuel and the primary air are supplied to the vaporization chamber (16) by the refueling nozzle (17) and the blowing nozzle (15) to vaporize the atomized fuel. The mixture of the burned air and the primary air becomes a combustion flame in the burner head (26) and burns in the combustion cylinder (21). And the blower fan
The secondary air by (13) is mixed with the combustion gas discharged from the combustion tube (21) and blown out into the room from the warm air outlet (2) for heating.

At this time, part of the air blown from the blower fan (13) is a heat shield plate.
By flowing into the cooling air passage (9) from the inlet (10) formed in the peripheral flat portion (12) of (7) and flowing out of the combustion tube (21) from the outlet (11). , The burner body (6) is the cooling air passage
While preventing the temperature of the burner body (6) from decreasing as much as possible by not directly cooling it with the air flowing through (9), it is possible to prevent other equipment from being heated by the radiant heat from the burner body (6). Not only can this be done, but the combustion flame can be prevented from varying due to the air flowing out from the cooling air passage (9).

(F) Effect The warm air heater according to the present invention has a bottomed cylindrical first heat shield plate provided on the outer periphery of the burner body and a second heat shield plate provided on the outer periphery of the first heat shield plate. A doughnut-shaped cooling air path is formed with the heat shield, and the burner body is surrounded by this cooling air path.
The cooling air passage is provided with an inflow port for letting in a part of the air blown by the blower fan, and an outflow port for letting this air flow out to the outside of the combustion cylinder, so that one of the blowing air flows in the cooling air passage. Since the air is circulated in the section, the air blown by the blower fan does not directly hit the burner body so that the temperature of the burner body does not drop as much as possible.
It is possible to prevent other equipment from being heated by the radiant heat from the burner body.Furthermore, since the blown air from the blower fan is made to flow out to the outside of the combustion cylinder, the air flowing out from the cooling air passage can be prevented. The combustion flame can be prevented by the.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a warm air heater according to the present invention, and FIG. 2 is a transverse sectional view of FIG. (1) …… Main body, (2) …… Hot air outlet, (6) …… Burner body, (7) …… Heat shield (first heat shield), (8) …… Heat shield ( (2nd heat shield), (9) ... cooling air passage, (10) ... inlet, (11) ... outlet, (13) ... blower fan.

Claims (1)

[Scope of utility model registration request] 1. A warm air heater comprising: a burner body; a combustion cylinder connected to the burner body; and a blower fan for blowing hot exhaust gas generated by combustion in the burner body into a room. The burner body is a donut formed by a bottomed cylindrical first heat shield plate provided on the outer periphery of the burner body and a second heat shield plate provided on the outer periphery of the first heat shield plate. Is surrounded by a cooling air passage, and the cooling air passage is provided with an inlet for letting in a part of the air blown by the blower fan and an outlet for letting this air out to the outside of the combustion cylinder. A hot air heater characterized by being provided.