JPS6024367B2 - combustion appliances - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion appliance having a structure in which a negative pressure area is created by the air sent from a propeller fan, and combustion air is supplied and combusted by the pressure difference between the negative pressure and atmospheric pressure. The purpose of the present invention is to reduce the blowing capacity by efficiently supplying combustion air, and also to eliminate hot air flow and provide comfortable heating.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In the figure, wind generated by a propeller fan 2 provided at the top of a cylindrical wind barrel 1 travels downward toward a baffle plate 4 provided at a lower position facing the propeller fan 2.

When the wind passes through the gap a between the baffle plate 4 and the wind cylinder 1, which is designed around its outer periphery, the wind speed increases, and the wall surface between the combustion tube 3 and the wind arm 1, which serves as a heat source for generating hot air, as shown by arrow a. The wind flows along the combustion tube 3, and there is no backflow of the wind into the combustion tube 3. At this time, the combustion tube 3 is located at the center (negative pressure region) of the swirling air supplied from the propeller fan 2, and also serves as a guide for this swirling air. In addition, since the lower part of the baffle plate 4 becomes negative pressure due to the wind sent by the propeller fan 2, a wick is inserted into the oil tank 7 from the outside of the bonito body 6 as shown by arrow b to the burner 5 part in the combustion tube 3. Combustion air is sucked in through the guide tube 8, mixed with fuel sucked up from the oil tank 7 by the wick 9 in the burner 5, and burned. The combustion exhaust gas generated by the combustion mixes with the wind sent by the propeller fan 2 and is discharged from the hot air outlet 10 to the outside of the weight body 6 as warm air. Here, the diameter of the slope 4 determines the amount of combustion and the amount of hot air.

In other words, as the diameter of the baffle plate 4 increases and the gap between it and the wind arm 1 becomes smaller, the pressure difference between the negative pressure at the bottom of the baffle plate 4 and the atmospheric pressure increases, and the amount of combustion air supplied increases. Therefore, the amount of combustion increases, but on the other hand, the amount of hot air decreases.
Conversely, as the clearance increases, the air volume increases, but the amount of combustion air decreases and the amount of combustion decreases. Therefore, the size of the air baffle plate 4 must be selected appropriately depending on the specifications of the appliance. There is. Furthermore, since the burner 5 of this embodiment is an air leading type burner in which the combustion amount changes depending on the amount of combustion air as described above, the combustion amount can be adjusted by changing the rotation speed of the propeller fan 2. In addition, since the wind sent out from the propeller fan 2 flows downward in the flea group 1 with a component force in the same direction as the rotational direction of the propeller fan 2, the wind blows completely in the warm air guide wall 11 at the bottom of the wind barrel 1. This creates a swirling flow. Therefore, if the hot air guide wall 11 and the combustion tube 3 are coaxially arranged as shown in FIG. 4, the pressure loss due to the hot air flow will increase, leading to a decrease in air volume and the negative pressure generated by the propeller fan 2 due to the increase in absolute pressure. decreases, and the amount of combustion air decreases. Therefore, the combustion tube 3 is provided offset to the hot air guide wall 11, and the cross-sectional area of the space between the two is gradually increased in accordance with the rotational direction of the propeller fan 2, as shown in FIG. Then, since the flow passage cross-sectional area increases according to the direction of rotation with respect to the swirling flow blown out from the wind chest 1, the hot air can be guided to the hot air outlet 10 without causing pressure loss. Created wind control plate 4
The negative pressure in the lower part of the unit is not reduced either. Therefore, there is no reduction in the amount of combustion air. In addition, since the flow is swirling in the direction of rotation of the propeller fan 2, there is no disturbance in the wind flow due to collisions, and since the flow is rectified in one direction and blown out from the hot air outlet 10, the hot air is even and uniform for hot air heating. It can be performed. As is clear from the above description of the embodiments, according to the present invention, even if air is sent by a propeller fan, the air from the propeller fan can be efficiently blown to the hot air outlet, so that sufficient air flow is achieved. Not only can the air flow be rectified, the hot air will be evenly distributed, but the negative pressure effect of the baffle plate will also be fully exerted, allowing for good combustion. There is something big.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a combustion appliance according to an embodiment of the present invention;
FIG. 2 is a sectional view of the appliance as seen from the front, FIG. 3 is a sectional view of the appliance as seen from the side, and FIGS. 4 and 5 are horizontal sectional views of the hot air guide plate. 1...Wind barrel, 2...Propeller fan, 3...Combustion tube (heat source), 4...Blow plate, 10...Hot air outlet, 1 1...・・Warm air guide plate (wind barrel). Figure 1 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] 1 A propeller fan that generates a vertical air flow is provided in the housing, and on the downstream side of this propeller fan, an air passage bends from the vertical direction to the horizontal direction and connects to the hot air outlet provided on the rising wall of the housing. A wind cylinder is provided, and a cylindrical heat source for generating hot air is disposed through a baffle plate in a portion of the wind cylinder that faces the propeller fan, and this heat source is connected between the heat source and the wind cylinder. A combustion appliance characterized in that the propeller fan is eccentrically provided with respect to the wind barrel so that the gap gradually increases in accordance with the direction of rotation of the propeller fan.