JPH0723809B2 - Hot air heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hot air heater such as a fan heater.

2. Description of the Related Art Generally, a fan heater using gas or oil as a fuel is constructed as shown in FIG. That is, in FIG. 4, 10 is a main body case in which a blowout port 11 is provided on the lower front surface, 12 is a combustion cylinder provided in the main body case, 13 is a fan for sending warm air to the combustion cylinder 12, and 14 is The fan surrounds the combustion cylinder 12
A duct for guiding the wind from 13 to the outlet 11, 15 is the combustion cylinder 12
A large number of through holes 15a are formed by cutting and raising by a pressure plate provided at the upper open portion so as to cover the open portion.

In the hot air heater configured as described above, the wind from the fan 13 and part of the combustion gas from the burner 16 partially suppress the pressure plate 15 and the duct 14.
And the rest are mixed in the upper front part of the combustion tube 12 and guided to the blower outlet 11 by the duct 14.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional configuration, the amount of the combustion gas flowing from the through hole 15a formed in the pressure suppression plate 15 to the upper side of the duct 14 is small, so that the air is sufficiently mixed with the air sent from the fan 13. It was led to the air outlet 11 without it, causing the temperature unevenness of the warm air. In addition, the burner 16 from the electromagnetic pump (not shown)
When the flow rate of kerosene sent to is too large due to abnormal control or air leakage from the electromagnetic pump, the air-fuel ratio is out of balance and a yellow flame is generated, which spreads the flame.
There is a possibility that a very dangerous state may occur in which it hits the lower surface of 15 and flows out of the gap T as it is, is guided to the outlet 11 and causes a flame outside the device.

The present invention solves the above-mentioned conventional problems, and improves the mixing of the combustion gas and the air from the fan to eliminate the temperature unevenness of the hot air, and at the time of an abnormal flow of kerosene, the flame outside the appliance The purpose is to prevent the blowing out of the.

Means for Solving the Problems In order to solve the above problems, the present invention provides a large opening in a portion of a pressure suppression plate that faces a combustion cylinder, and a heat shield that is slightly dry and smaller than the large opening above the large opening. The plates are arranged at intervals, and downward bending portions are provided at the front and rear parts of the heat shield plate.

Action According to the present invention, most of the combustion gas emitted from the open portion of the upper part of the combustion cylinder is discharged from the opening of the pressure suppression plate to the upper part, and part of the combustion gas is directly discharged to the upper part between the outer periphery of the heat shield plate and the opening. At the same time, the rest of the space between the heat shield plate and the pressure suppression plate is dispersed by flowing out from both sides to the left and right, and is thoroughly mixed with the air sent from the fan. The unevenness is also reduced. Further, since the flame that has spread when the kerosene has an excessive flow rate is also dispersed, the flame stays in the upper part of the duct and does not blow out of the appliance through the outlet.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show a warm air heater according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is a main body case having a blowout port 2 on the lower front surface, and 3 is a combustion cylinder provided in the main body case, which is provided so as to cover the burner 4 and has an open portion at the upper portion. . 5 is a fan for sending warm air to the combustion cylinder 3, 6 is a duct that surrounds the combustion cylinder 3 and guides the wind from the fan 5 to the outlet 2, and 7 is an upper open portion of the combustion cylinder 3. With the pressure suppression plate provided to cover this open part,
A large opening 7a is provided in a portion facing the combustion cylinder 3. 8
Is a heat shield plate which is arranged above the large opening portion 7a at a distance so as to face the large opening portion 7a and is formed to be slightly smaller than the large opening portion 7a as shown in FIG. An obliquely downward bent portion 8a is formed.

In the above structure, the combustion gas burned in the burner 4 flows out from the open portion in the upper part of the combustion cylinder 3, is guided to the opening 7a of the pressure control plate 7, and part of the combustion gas is directly upward from the space A between the outer periphery of the heat shield plate and the opening. While flowing out to the heat shield plate 8, the rest collides with the heat shield plate 8 and flows out from the space B between the heat shield plate and the pressure suppression plate to the left and right to be dispersed and mixed with the wind from the fan 5 above the pressure suppression plate 7.
The duct 6 allows the air outlet 2 on the lower front surface of the main body case 1
Is discharged to the outside of the equipment as hot air.

Here, the combustion gas guided to the opening 7a of the pressure control plate 7 is suppressed by the wind from the fan 5 by the bent portion 8a at the rear of the blocking plate 8 and does not flow backward, and by the bent portion 8a 'at the front. Since the air is not directly guided to the air outlet 2 but is evenly dispersed above the pressure control plate 7, mixing with the wind from the fan 5 is performed better.

On the other hand, even if the flow rate of kerosene becomes excessive due to some influence and the flame spreads, this flame is also dispersed by the heat shield plate 8 as described above, the flame stays above the duct 6, and the appliance exits from the outlet 2. It never blows out.

EFFECTS OF THE INVENTION As is apparent from the description of the embodiments above, according to the present invention, most of the combustion gas emitted from the upper part of the combustion tube is guided to the opening of the pressure suppression plate, and is uniformly dispersed by the heat shield plate to be discharged from the fan. It mixes well with the air and reduces the temperature unevenness of the warm air.
Even in the case of an abnormal flow rate of kerosene, there is no concern that the flame will blow out of the equipment.

[Brief description of drawings]

FIG. 1 is a sectional view showing an entire warm air heater according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view thereof, FIG. 3 is a plan view thereof, and FIG. It is sectional drawing which shows a heater. 1 ... Main body case, 3 ... Combustion tube, 5 ... Fan, 6 ...
… Duct, 7 …… Suppressor, 8 …… Heat shield, 8a …… Bend.

Claims (1)

[Claims] 1. A main body case having a blowout port at a lower portion, an open combustion cylinder provided in the main body case, a fan for supplying hot air, and a wind from a fan covering the combustion cylinder. After being mixed with the combustion gas from the combustion cylinder by changing the current downward in the upper part of the combustion cylinder, a duct that guides to the blowout port is provided, and a pressure suppression plate is provided in the open portion facing the burner in the combustion cylinder.
The fan side of the pressure suppression plate is closed by a closing portion, and the front upper portion of the combustion cylinder on the outlet side is bent toward the combustion cylinder to form a gap with the upper end of the combustion cylinder and faces the combustion cylinder. A large opening is provided in a portion, and a heat shield that is slightly smaller than the large opening is arranged above the large opening with a space therebetween, and downward bent portions are formed in front and rear portions of the heat shield. Hot air heater equipped with.