JPS6330918Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot-air heater that has a double-tube combustion tube and releases the combustion heat to the outside as hot air.

BACKGROUND ART One type of hot air heater uses a so-called double-tube type combustion tube composed of an inner flame tube, an outer flame tube, and an outer flame tube. As is well known, in this combustion tube, the upper end of a cylindrical lamp wick protrudes between an inner flame tube and an outer flame tube, and the fuel supplied from the upper end of the wick is used for combustion supplied from the lower part of the combustion tube. Complete combustion is carried out in the firing cylinder using air. The high-temperature combustion air is then released from the opening at the top of the combustion tube and blown into the room as warm air by the wind from the convection fan.

However, with such a configuration, there is a possibility that wind from the convection fan may enter the combustion cylinder through the upper end opening. In this case, the pressure inside the combustion cylinder increases and flame comes out from the lower end of the combustion cylinder, which is not preferable.

The purpose of the present invention is to provide a cylinder whose upper end is located higher than the upper end opening of the combustion cylinder on the outside of the combustion cylinder, and to reduce the influence of the convection fan on the lower space in the combustion chamber where this cylinder and the combustion cylinder are located. By partitioning the upper space from the upper space so as not to receive any airflow, and configuring this lower space to communicate with the outside, the draft of the combustion cylinder becomes stronger and the calorie increases. To provide a warm air heater that does not cause flame leakage from parts, etc.

The present invention will be described below with reference to an embodiment shown in the drawings. In the figure, reference numeral 11 denotes a main body case, and a fixed tank 12 is provided at the inner lower part of the main body case, and a combustion case 13 is provided at the upper part to form a combustion chamber 14. A burner basket 16 is provided on the fixed tank 12, and a cylindrical lamp wick 17 is provided inside the burner basket 16 so as to be movable up and down by a wick guide (not shown). A double-tube combustion cylinder 20 is placed on a fire pan 18 formed at the upper end of the burner basket 16. This combustion tube 20 includes an inner flame tube 21 and an outer flame tube 2.
2. The outer tube 23 is integrally connected with a cross pin (not shown), and the upper end of the wick 17 is located between the inner flame tube 21 and the outer flame tube 22 as shown in the figure when raised.

Here, the lower surface portion 13a of the combustion case 13 is located at approximately the same level as the fire pan portion 18, and the space above it becomes the combustion chamber 14. Further, a chopstick or a hot plate 25 is provided on the lower surface portion 13a, and the combustion chamber 1
4 and the lower space in which the fixed tank 12 is provided, and at the same time, prevent air from circulating therebetween. The combustion case 13 has its front and rear surfaces open, that is, the left and right sides in the figure, and a hot air blowing section 27 equipped with a louver is provided on the front surface of the main case 11, which faces the open front surface. Further, a convection fan 28 and its drive motor are disposed on the back surface of the main body case 11 facing the rear open portion.

A cylindrical body 30 is disposed outside the combustion tube 20 so that its open upper end is located higher than the upper end of the combustion tube 20. Here, the cylindrical body 20 is divided into two parts, a front side and a rear side, and these are connected to each other by engaging pawls, bolting, or the like. Reference numeral 31 denotes a lower reflector, and its rear, ie, right side portion is connected to the cylindrical body 30.
The cylinder 3 in the combustion chamber 14 at the lower end level of
It divides the outer space of 0 into upper and lower parts. Further, this lower reflector plate 31 is fixed to both the cylindrical body 30 and the inner surface of the combustion case 13 by spot welding or the like. Therefore, it also has the function of supporting the cylindrical body 30. Further, the front portion of the lower reflector 31, that is, the left side portion in the figure, is inclined upward, and the left end in the figure reaches the lower part of the open surface of the hot air blowing section 27. Therefore, the lower space 14b of the combustion chamber 14 partitioned by the lower reflector 31 communicates with the outside through a part of the hot air blowing section 27. That is, the lower reflector 31 moves the inside of the combustion chamber 14 from the convection fan 28 through the upper part of the cylindrical body 30 to the warm air blowing part 27.
It is partitioned into an upper space 14a that reaches up to the cylindrical body 30, and a lower space 14b where the lower end opening of the cylindrical body 30 and the lower part of the combustion tube 20 are located and also communicates with the outside.

In the above configuration, when performing combustion, first raise the wick 17 to the position shown in the figure using the wick lifting mechanism,
Light this. The high-temperature combustion air generated by this combustion is discharged from the upper end of the combustion tube 20 into the cylinder 30, and further into the combustion chamber 30 from the upper end opening of the cylinder 30.
Released within 4 days. The high temperature combustion air discharged into the combustion chamber 14 by operating the convection fan 28 is blown into the room from the warm air blowing section 27 as warm air. Further, the air from the convection fan 28 efficiently removes heat from the outer peripheral surface of the cylinder 30, increasing the temperature of the above-mentioned hot air.

At this time, in the combustion tube 20, the draft force is increased due to the provision of the cylinder body 30 on the outside and the air flow caused by the convection fan 28. As a result, combustion becomes more active, and it is possible to increase calories by approximately 20% compared to the same combustion cylinder.

This structure also has excellent wind resistance, and the amount of wind that enters the combustion cylinder 20 from above is small because the cylinder body 30 is located around it and its upper end opening is located at a high position. Therefore, no flame comes out from the lower part of the combustion tube 20. Further, the lower part of the combustion tube 20 is separated from the upper space 14a by a lower reflector 31, and is not affected by the wind from the convection fan 28. Therefore, the combustion state can always maintain stable combustion with a balanced amount of supplied air. Furthermore, the lower space 14b partitioned by the lower reflector 31 communicates with the outside through a part of the hot air blowing section 27, and the introduced air is guided downward by the inclined surface of the lower reflector 31, so that the air is strongly Active combustion occurs due to the draft force, and the lower end seating portion of the combustion tube 20 does not become under negative pressure. Therefore, flame leakage from the lower end seating portion of the combustion tube 20, which is a concern due to negative pressure in this portion, does not occur at all. Furthermore, convection fan 28
All of the air is guided to the hot air blowing section 27 by the inclined surface provided at the front of the lower reflector 31, so that it can be efficiently blown out to the outside without remaining in the combustion chamber 14.

As described above, according to the present invention, a cylindrical body that surrounds the outside of the combustion tube is provided inside the combustion chamber, and a lower reflector plate that partitions the combustion chamber into upper and lower parts is provided, so the draft force of the combustion tube is strengthened and a good The calorific value can be increased by approximately 20% compared to the same combustion cylinder while in the combustion state. In addition, the wind performance of the combustion tube has been improved, so
A stable combustion state can be maintained at all times, and no flame leaks to the outside. Furthermore, the air produced by the convection fan can be efficiently blown outside from the warm air blowing section, and various other effects can be produced.

[Brief explanation of the drawing]

The figure is a sectional view showing an embodiment of the hot air heater according to the present invention. 14... Combustion chamber, 14a... Upper space, 14b
... Lower space, 20 ... Combustion tube, 27 ... Hot air blowing part, 28 ... Convection fan, 30 ... Cylindrical body, 31
...lower reflector.

Claims (1)

[Scope of utility model registration request] A cylindrical body is provided on the outer periphery of the combustor at a certain distance, and the upper end opening is located higher than the upper end of the combustor. A convection fan that blows air from the air blowing part, an upper space that communicates from the convection fan to the hot air blowing part through the upper part of the cylinder in the combustion chamber where the combustion tube and the cylinder are located, a lower end opening of the cylinder, and a lower part of the combustion tube. A hot-air heater characterized by comprising a lower reflector that partitions the space into a lower space where the space is located and which communicates with the outside.