JP6148130B2 - Combustion device - Google Patents

Description

  The present invention relates to a combustion apparatus that blows warm air to heat a room.

  Conventionally, this type has a burner head ring with one end connected to the vaporizing cylinder on the outer periphery of the burner head, and heats the combustion heat back to the vaporizing cylinder as heat for vaporizing the fuel oil. There are some which reduce the generation of nitrogen oxides by guiding the supplied secondary air to the secondary flame and cooling the secondary flame to lower the temperature. (For example, see Patent Document 1)

JP-B-2-23767

  By the way, with this conventional one, there is an upper limit on the amount of flame heat recovered by the burner head ring, so if the maximum combustion amount at high heat power is increased, the amount of flame heat recovered by the burner head ring is insufficient. As a result, there is a problem that the combustion temperature rises and the value of nitrogen oxides increases.

  In addition, in order to reduce the nitrogen oxide value by increasing the amount of heat recovered from the flame in the burner head ring and lowering the nitrogen oxide value while increasing the maximum combustion amount at high heat power, If the height is increased, there is a problem that the value of carbon dioxide and nitrogen dioxide in nitrogen oxides increases.

  If the height of the burner head ring is further increased, during high heat power, a large amount of secondary air from the blower fan hits the burner head ring and the burner head ring is overcooled, resulting in insufficient heat back. There was a problem that the secondary air generated by the fan hits the burner head ring so that the temperature of the burner head ring rises and heat back becomes excessive.

  Further, when the height of the burner head ring is made higher than that of the burner head, there is a problem that the flame formed on the burner head is hidden by the burner head ring and the flame cannot be visually confirmed from the outside.

In order to solve the above-mentioned problems, in claim 1 of the present invention, a bottomed cylindrical vaporization cylinder that includes a heater and premixes vaporized gas and combustion air, and an air-fuel mixture from the vaporized cylinder is provided on the peripheral wall. And a burner head ring that burns with a plurality of flame holes, and a burner head ring that covers the peripheral wall of the burner head by a standing wall that stands on the outer periphery of the burner head. burner head ring is configured and upright wall which is above the height of up to the upper end of the burner head top end, by a standing wall which is a top end below the height to the upper end of the burner head, the upper end of the burner head On the standing wall that is less than the height up to the upper end, a notch for ignition electrode, a notch for frame rod, and a notch for combustion confirmation window are formed at substantially equal intervals .

According to a second aspect of the present invention, the height of the standing wall of the burner head is a portion of the standing wall where the secondary air from the blower fan provided on the back surface portion of the device hits. The upper end is provided higher than the height up to the upper end of the burner head .

According to a third aspect of the present invention , the central portion of the ignition electrode cutout portion is further cut out to form an erroneous discharge prevention portion.

According to a first aspect of the present invention, the burner head ring includes an upright wall having an upper end equal to or higher than a height to the upper end of the burner head, and an upright wall having an upper end less than the height to the upper end of the burner head. In the standing wall having the upper end less than the height to the upper end of the burner head, an ignition electrode cutout portion, a frame rod cutout portion, and a combustion confirmation window cutout portion are provided. Since it was formed at approximately equal intervals, the standing wall that is higher than the burner head height sufficiently contacts the flame and recovers heat from the flame, even if the maximum amount of combustion at high heating power is increased. Can be prevented from increasing, and the value of nitrogen oxides can be prevented from increasing.

Also, even if the maximum amount of combustion at high thermal power is increased, the notch for ignition electrode, the notch for frame rod, and the notch for combustion confirmation window are formed on the standing wall of the burner head ring. Therefore, it is possible to prevent the temperature of the flame from dropping too much from the conventional temperature and to prevent the value of nitrogen dioxide in carbon monoxide and nitrogen oxide from increasing.

Also, if the maximum amount of combustion at high thermal power is increased, more secondary air from the blower fan hits the burner head ring, but the ignition electrode notch and the frame rod notch are formed on the standing wall of the burner head ring. Since the burner head ring is not cooled too much, the heat back can be prevented from being insufficient.

At the minimum combustion amount, the secondary air from the blower fan hits the burner head ring little, but the burner head ring's standing wall has an ignition electrode cutout, a frame rod cutout, and a combustion confirmation window. Since the notch is formed , the flame does not come into contact therewith, the temperature of the burner head ring does not rise, and the heat back can be prevented from becoming excessive.

Even if the height to the upper end of the burner head ring's standing wall is the same as the height to the upper end of the burner head, the notch for the combustion confirmation window is formed. Can be visually confirmed.

According to the second aspect of the present invention, the height of the standing wall of the burner head standing wall at which the part of the secondary air from the blower fan provided on the back surface portion of the device hits is raised. Since the upper end of the wall is higher than the height to the upper end of the burner head, the secondary air from the blower fan at the minimum combustion amount hits the standing wall that is higher than the height of the burner head, and is cooled. The temperature of the head ring does not increase, and the heat back can be prevented from becoming excessive.

According to the third aspect of the present invention, since the center portion of the ignition electrode cutout portion is further cut out to form an erroneous discharge prevention portion, a spark for ignition from the ignition electrode does not discharge erroneously. Is.

The schematic block diagram of one Embodiment of this invention. The front view of the burner head ring. FIG. The same side view. The top view of the same vaporization pipe | tube. FIG. The BB principal part sectional drawing. CC main part sectional drawing.

Next, a combustion apparatus according to the present invention will be described with reference to an embodiment shown in the drawings.
1 is a bottomed cylindrical vaporization cylinder, the heater 2 which consists of a sheathed heater is cast in an upper peripheral wall, and it is hold | maintained at 220-250 degreeC by the energization control by the temperature sensor 3 which consists of the thermistor provided in the lower part, The fuel oil supplied from the spray nozzle 4 placed on the lower peripheral wall opposite to the temperature sensor 3 is used as vaporized gas, and the combustion air supplied from the blower port 5 is premixed.

  6 is a cylinder-shaped burner head covered with the upper opening of the vaporizing cylinder 1, and has peripherally arranged flame holes 7 and 8 arranged in two upper and lower stages, and the upper flame hole 7 has a diameter of 6 to 7 mm. The lower flame holes 8 have a slightly smaller diameter, a diameter of 5 to 5.5 mm, and 16 pieces are formed on the entire circumference. The lower flame holes 8 are in close contact with the inner and outer surfaces of the peripheral wall on which the flame holes 7 and 8 are formed. Outer metal nets 9 and 10 are provided.

  11 is a burner head ring that is connected at one end to the upper end of the vaporizing cylinder 1 and is erected on the outer periphery of the burner head 6, and is in contact with the primary flame and secondary flame formed by the upper and lower flame holes 7, 8 to hold and vaporize the flame. Heating of vaporization heat to the cylinder 1 is performed.

  An ignition electrode 12 is provided on the outer periphery of the burner head 6 and ignites by discharge between the burner head 6. On the opposite side of the diagonal line, a flame rectifying action is used to set the ignition and combustion states as flame voltages. A frame rod 13 for detection is provided.

  14 is a trumpet-shaped first collecting plate that divides the vaporizing cylinder 1 and the burner head 6. After the air-fuel mixture is once collected at a portion suspended in the vaporizing cylinder 1, the air-fuel mixture is once again between the second collecting plate 15. Aggregates after diffusion, promotes mixing by repeating diffusion and aggregation, and suppresses the flow rate of the air-fuel mixture. The first and second aggregate plates 14 and 15 are previously joined and integrally molded It is.

  Reference numeral 16 denotes a rectified cylindrical rectifier provided on the second collecting plate 15, and has a plurality of rectifying holes 17 on the upper side, and the upper and lower stages of the burner head 6 while rectifying the inflowing air-fuel mixture. It guides to the flame holes 7 and 8.

  Reference numeral 18 denotes a combustion fan comprising a turbo fan that supplies combustion air to the vaporizing cylinder 1, and supplies the room air sucked from the suction port 19 from the blower port 5 through the blower passage 20.

  Reference numeral 21 denotes an oil feed pipe that supplies fuel oil pressure-fed by an electromagnetic pump 22 into the vaporizing cylinder 1, and a spray nozzle 4 that protrudes into the vaporizing cylinder 1 is provided at the tip thereof.

  A fixed tank 23 is connected to the other end of the oil feeding pipe 21 and temporarily stores fuel oil supplied from a cartridge-type oil supply tank 24 through a valve mechanism 25. The fuel oil amount is detected, and fuel is supplied at a predetermined amount or less. A float type oil supply detecting means 26 for informing and a filter cylinder 27 for preventing the inflow of dust into the oil feeding pipe 21 are provided.

  Reference numeral 28 denotes a rectifying network which is attached to the outer periphery of the rectifying cylinder 16 and extends upward, and applies final rectification to the air-fuel mixture discharged from the rectifying cylinder 16.

  The burner head ring 11 has an upper end of a standing wall 29 erected on the outer periphery of the burner head 6 at the same height as the upper end of the burner head 6. A cutout portion 30 for a frame, a cutout portion 31 for a frame rod, and a cutout portion 32 for a combustion confirmation window are formed.

  Note that a part of secondary air from a blower fan (not shown) provided on the back side of the apparatus main body hits the burner head ring 11, and the height of the standing wall 29 at a part to which a part of the secondary air hits. Is provided at the same height as the upper end of the burner head 6.

  Whereas the height to the upper end of the standing wall 29 is 29 mm, the heights of the ignition electrode notch 30, the frame rod notch 31, and the combustion confirmation window notch 32 are 24 mm, Further, the center portion of the ignition electrode cutout portion 30 is further cut away to prevent the spark for ignition from the ignition electrode from being erroneously discharged, thereby forming an erroneous discharge prevention portion 33, and the erroneous discharge prevention portion 33. The height of is formed to 15 mm.

  Further, the opposed portions of the ignition electrode cutout portion 30, the frame rod cutout portion 31, and the combustion confirmation window cutout portion 32 have the same width as the widths of the cutout portions 30, 31, 32. A standing wall 29 that is not cut is formed.

Next, the operation of this embodiment will be described.
First, when an operation switch (not shown) is turned ON, energization of the heater 2 of the vaporizing cylinder 1 is started, and the temperature sensor 3 indicates that the temperature of the vaporizing cylinder 1 has increased to a temperature at which fuel can be vaporized. When detected, the electromagnetic pump 22 is driven to supply fuel to the vaporizing cylinder 1, and the combustion fan 18 is driven to blow combustion air to the vaporizing cylinder 1.

  The fuel vaporized in the vaporizing cylinder 1 and the combustion air are mixed to generate vaporized gas. The vaporized gas is ignited by the ignition electrode 12 and the ignition is detected by the frame rod 13 to start combustion. Is.

  Here, when the combustion amount is set to the maximum combustion amount, the flame formed by the burner head 6 becomes large, but the standing wall 29 of the burner head ring 11 sufficiently contacts the flame and recovers heat from the flame. It is possible to prevent the temperature of the flame from rising and prevent the value of nitrogen oxide from increasing.

  Even at the maximum combustion amount, the ignition electrode cutout portion 30, the frame rod cutout portion 31, and the combustion confirmation window cutout portion 32 are formed on the standing wall 29 of the burner head ring 11. Therefore, it is possible to prevent an increase in the value of nitrogen dioxide in carbon monoxide and nitrogen oxides.

  In addition, secondary air from a blower fan (not shown) hits the burner head ring 11 at the maximum combustion amount. The ignition electrode cutout portion 30 and the frame rod cutout are formed on the standing wall 29 of the burner headring 11. Since the notch 31 and the combustion confirmation window notch 32 are formed, the burner head ring 11 is not overcooled, and the heat back can be prevented from being insufficient.

  Further, at the minimum combustion amount, the secondary air from the blower fan hits the burner head ring 11 to a small extent, but the ignition electrode notch 30, the frame rod notch 31, and the standing wall 29 of the burner head ring 11 Since the combustion confirmation window notch portion 32 is formed, the flame does not come into contact therewith, the temperature of the burner head ring 11 does not rise, and the heat back can be prevented from becoming excessive. It is.

  Even if the height of the standing wall 29 of the burner head ring 11 is the same as that of the burner head 6, the combustion confirmation window notch 32 is formed, so that the flame is visually observed from the outside by the combustion confirmation window notch 32. It can be confirmed.

  Further, since the height of the standing wall 29 where the part of the secondary air from the blower fan hits is set at the same height as the upper end of the burner head 6, the secondary by the blower fan at the minimum combustion amount. It is possible to prevent the air from hitting the standing wall 29 of the burner head ring 11 having the same height as the upper end of the burner head 6 so that the temperature of the burner head ring 11 does not rise and the heat back becomes excessive. Is.

  Further, since the notch portion 30 for the ignition electrode and the notch portion 31 for the frame rod are provided, the wire rods of the ignition electrode 12 and the frame rod 13 do not become abnormally high temperature and the durability of the ignition electrode 12 and the frame rod 13 is improved. It is possible to prevent the deterioration of the properties.

By the way, it is the conventional one with the maximum combustion amount of 3.4 kW, nitrogen oxide at the maximum combustion amount is 90 ppm, nitrogen dioxide in the nitrogen oxide is 0.0045 ml / kj, carbon monoxide / carbon dioxide is 0.0003 On the other hand, the maximum combustion amount is 3.6 KW in this example, the nitrogen oxide at the maximum combustion amount is 85 ppm, the nitrogen dioxide in the nitrogen oxide is 0.004 ml / kj, and the carbon monoxide / carbon dioxide is 0. .0003, the value of nitrogen oxides and nitrogen dioxide in nitrogen oxides is improved while maintaining the value of carbon monoxide / carbon dioxide even when the maximum combustion amount is made larger than before. is there.
Incidentally, when the maximum combustion amount is a conventional one with a maximum combustion amount of 3.4 KW, and only the maximum combustion amount is increased to 3.6 KW, the nitrogen oxide at the maximum combustion amount exceeds 100 ppm.

DESCRIPTION OF SYMBOLS 1 Evaporation cylinder 2 Heater 6 Burner head 7, 8 Flame hole 11 Burner head ring 29 Standing wall

Claims (3)

A bottomed cylindrical vaporization cylinder that includes a heater and premixes vaporized gas and combustion air, and a cylinder-shaped burner head that burns the mixed gas from the vaporization cylinder in a plurality of flame holes provided on the peripheral wall And a burner head ring that covers the peripheral wall of the burner head by a standing wall standing upright on the outer periphery of the burner head, wherein the burner head ring has an upper end that is higher than a height up to the upper end of the burner head. and upright wall you, upper end is constituted by the upright wall that is less than the height to the upper end of the burner head, wherein the upper end of the standing wall which is less than the height to the top of the burner head, ignition 1. A combustion apparatus comprising: a notch for an electrode, a notch for a frame rod, and a notch for a combustion confirmation window formed at substantially equal intervals . The height of the standing wall of the burner head standing part where the part of the secondary air from the blower fan provided on the back part of the equipment body hits is as high as the top of the standing wall reaches the top of the burner head. The combustion apparatus according to claim 1, wherein the combustion apparatus is provided at a height equal to or higher than the height of the combustion apparatus. The combustion apparatus according to claim 1 or 2, wherein a center portion of the ignition electrode cutout portion is further cut out to form an erroneous discharge prevention portion.

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