JPH0136008B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a radiant heater configured to make a red-hot member red-hot using a burner device that vaporizes and burns liquid fuel such as kerosene.

(b) Prior art This type of conventional radiant heater will be explained based on FIGS. The oil is fed under pressure to the carburetor 4 via the oil supply pipe 3 by the oil supply pump 2,
The vaporized gas is vaporized by an electric heater in the vaporizer 4, and the combustion primary air is sucked into the mixing tube 6 of the burner 5 and blown out. After being premixed in the mixing tube 6, It is constructed so that it is ejected from 7, forms a line-shaped blue combustion flame 8, and burns. Reference numeral 9 denotes a hollow housing-like combustion tube in which the horizontally elongated flame port member 7 is exposed at its lower part, and within this combustion tube 9, a flat glowing member 10 is disposed directly above the burner 5. This flat red-hot member 10
is heated to a high temperature by the combustion flame 8 of the burner 5 to become red hot, and the heat rays emitted by the red heat are transmitted through the heat ray transmitting body 11 on the front surface of the combustion tube 9 to perform radiant heating. It's summery.

Reference numeral 12 denotes a hot air blower disposed at the rear of the combustion tube 9. A blower fan 14 is rotated by the drive of a motor 13, and the accelerated air flow generated by the blower fan 14 and the combustion tube 9 are heated. Combustion exhaust gas discharged from the room joins with the combustion exhaust gas, and hot air is sent indoors.
Reference numeral 15 denotes a partition plate disposed at the lower part of the combustion tube 9 with a space between the burner 5 and the burner 5 .

In the conventional device described above, the combustion gas is made to rise along the red-hot member 10, but due to the focusing action of the combustion flame, the upper part of the red-hot member 10 shown in A and B in FIG. The red heat was poor at both ends, causing uneven red heat.

(c) Purpose of the Invention The purpose of the present invention is to eliminate the above-mentioned drawbacks of the conventional structure.

(d) Structure of the Invention In order to achieve the above-mentioned object, the present invention vaporizes liquid fuel, premixes the vaporized gas with combustion air, and distributes the premixed gas above and to the oblong flame nozzle member. Consisting of a flat incandescent member disposed along the longitudinal direction, a guide plate forming a combustion gas passage between the flat incandescent member, and a cover plate that closes the upper opening of the gas passage. In addition, the cover plate is configured to have through holes located only at both left and right ends of the gas passage.

(E) Embodiments Examples of the present invention will be described below with reference to the drawings of FIGS. 1 to 4. Reference numeral 20 denotes an air supply blower that sucks outside air through a filter 21, and includes a motor 23 interposed in the suction passage 22, and the motor 2.
two air supply fans 24, 24 driven at 3;
It consists of a fan case 25 made of synthetic resin in which the air supply fans 24, 24 are built-in, and the air sent from this air supply blower 20 is supplied via an air amount regulator 26 made of a solenoid damper or the like. The primary combustion air is sent from the air pipe 27 to the air nozzle 28 and whose volume is regulated by the air volume regulator 26, and then is forcedly delivered from the air nozzle 28 into the vaporization chamber 30 of the burner device 29.

Reference numeral 31 denotes an oil level regulator which has a removable auxiliary tank 32 in an inverted state and stores a certain amount of liquid fuel inside. The fuel is pumped up by an electromagnetic pump 33 whose pumping amount is controlled, and is pumped into the vaporization chamber 30 through a fuel nozzle 35 at the tip of a fuel supply pipe 34 facing into the air nozzle 28.

The burner device 29 is equipped with an electric heater 36 that heats the peripheral wall of the vaporization chamber 30, and vaporizes the liquid fuel supplied into the vaporization chamber 30, and also pre-airs the vaporized gas and combustion primary air within the vaporization chamber 30. mix,
This premixed gas is ejected from the oblong flame port member 39 through the throttle passage 37 and the outlet passage 38, and is combusted by forming a line-shaped blue combustion flame 40 on the flame port member 39. Reference numerals 41 and 42 refer to a heat insulating material made of glass wool or asbestos placed on the outer bottom and outer periphery of the vaporization cylinder 43 forming the vaporization chamber 30 of the burner device 29, and 44 a bottomed cylindrical material surrounding the vaporization cylinder 43. The heat shield tube 45 is a partition heat shield plate that is connected to and integrated with the upper end of the heat shield tube 44.

Reference numeral 46 denotes a combustion cylinder in the form of a hollow casing attached to the partition heat shield plate 45, the upper part of which is open, and the oblong flame port member 39 of the burner device 29 facing at the lower part. Reference numeral 47 denotes a window hole opened in the front surface of the combustion tube 46, and the window hole 47 is closed by mounting a heat ray transmitting member 48 made of heat-resistant glass, and the lower end portion of the heat ray transmitting member 48 is a transparent portion. The part above that is the prism part.

Reference numeral 49 denotes a flat glowing member installed in the combustion tube 46 above the horizontally elongated flame port member 39 and along the longitudinal direction of the flame port member 39, and the glowing member 49 has a substantially serrated longitudinal section. A curled portion 50 is formed at the lower end thereof and is curled inward. Reference numerals 51 and 51 are provided at both left and right ends of the incandescent member 49, and the incandescent member 49 is connected to the back wall 4 of the combustion tube 46.
A support side plate 52 for fixing to the inner surface of 6' faces the red-hot member 49 and is attached to both the support side plates 51, 5.
The upper part of the guide plate 52 is inclined forward at an inclination angle (θ) of about 10 degrees with respect to the vertical line, and the upper part of the guide plate 52 is installed between the red-hot member 49 and the upper part of the guide plate 52. A narrowing combustion gas passage X is formed. 5
Numerous secondary air holes 3, 53, etc. are located at the lower end of the guide plate 52 and are bored throughout the entire lateral direction of the guide plate 52.
A part of the air blown by the hot air blower 58 introduced into the secondary air supply path Y is supplied to the lower part of the combustion gas path X as secondary air.

Reference numeral 54 denotes a cover plate formed integrally with one end of the red-hot member 49, and the cover plate 54 is provided so as to close the upper opening of the combustion gas passage X;
and a pair of oblong through holes 55 located within the combustion gas passage X and located only at both left and right ends;
55 have been established.

The warm air blower 58 is equipped with a motor 58a and a blower fan 58b consisting of a propeller fan, and generates wind that travels straight toward the combustion tube 46, thereby discharging the warm air from the hot air outlet of the outer case 59 into the room, etc. This hot air blower 58 is arranged in the upper part of the back of the exterior case 59 so as to be located behind the red-hot member 49 and the combustion tube 46. . Further, 61 is an upper heat shield plate disposed directly above the combustion tube 46, and 62 is a spark plug integrally provided with a flame rod.

Next, the operation of the present invention will be explained. When liquid fuel and combustion primary air are pumped into the vaporization chamber 30 whose peripheral wall has been preheated by the electric heater 36, the liquid fuel instantly vaporizes and the vaporized gas and combustion air are premixed, and this premixed gas is ejected from the oblong flame port member 39 into the combustion tube 46 through the outlet path 38, and a line-shaped blue combustion flame 40 is formed on the upper surface of the flame port member 39 for primary combustion.

On the other hand, at the same time when combustion is started, the motor 58a of the warm air blower 58 is driven, and the blower fan 58b is rotated to generate wind toward the combustion tube 46. Most of the air from this blower fan 58b is transferred to the combustion tube 4.
It joins with the combustion exhaust gas of the burner device 29 discharged from 6, becomes hot air, and is sent to the outside of the exterior case 59 from the hot air discharge port. Further, the blower fan 5
A part of the wind from 8b is introduced into the secondary air supply path Y through a large number of introduction holes 57, and
3, 53... is supplied to the upper part of the combustion flame 40 as combustion secondary air to promote secondary combustion.

Furthermore, the combustion gas rising in the combustion gas passage X tends to converge as it rises within the combustion gas passage Only through hole 55,
55, the combustion gas flows through that hole 5.
5, the focusing effect is relaxed, and the red heat at both ends of the upper part of the red-hot member 49 does not worsen as in the conventional case, and the red-hot member 4
9 can be uniformly and favorably made red hot.

Further, since the guide plate 52 is inclined so that the combustion gas passage X narrows upward, the upper part of the red-hot member 49 can be effectively heated.

Furthermore, since the red-hot member 49 has a curled portion 50 formed on its lower edge, it can be prevented from deforming due to the rising pressure and high temperature of the combustion flame 40, and its durability can be improved with a simple structure.

Furthermore, by opening the through holes 55, 55 only in the left and right end portions of the cover plate 54,
This acts as a resistance to the combustion gas rising inside and reduces the flow velocity, allowing the red-hot member 49 to be heated to a higher temperature and dramatically improving radiation efficiency.

(F) Effects of the Invention As described above, according to the radiant heater of the present invention, liquid fuel is vaporized, the vaporized gas is premixed with combustion air, and this premixed gas is heated on the oblong flame spout. A guide for forming a combustion gas passage between a burner device for combustion, a flat incandescent member disposed above and along the longitudinal direction of the oblong flame port member, and the flat incandescent member. It is composed of a plate and a cover plate that closes the upper opening of the combustion gas passage, and the cover plate has through holes located only at both left and right ends of the combustion gas passage, so that the red-hot member is not heated. can be heated uniformly and at high temperatures, dramatically improving radiation efficiency.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention;
The figure is an overall configuration diagram of a radiant heater that is an embodiment of the present invention, FIG. 2 is a vertical sectional view of FIG. 1, FIG. 3 is an enlarged sectional view of the main part of FIG. The plan view in Figure 3, Figures 5 and 6 are diagrams showing conventional examples.
The figure is a configuration diagram of a conventional device, and FIG. 6 is a longitudinal sectional view of FIG. 5. 29... Burner device, 39... Oblong flame port member, 49... Flat glowing member, 50... Curled portion, 52... Guide plate, X... Combustion gas passage, 54
... Cover plate, 55 ... Through hole.

Claims (1)

[Claims] 1. A burner device that vaporizes liquid fuel, premixes the vaporized gas with combustion air, and combusts the premixed gas on an oblong burner, and a burner device above the oblong burner. and a flat incandescent member disposed along the longitudinal direction thereof, a guide plate forming a combustion gas passage between the flat incandescent member, and a cover for closing an upper opening of the combustion gas passage. Consisting of a board,
The radiant heater further includes holes in the cover plate located only at both left and right ends of the combustion gas passage. 2. Claim 1, wherein the guide plate is inclined so that the combustion gas passage narrows upward.
Radiant heating machine as described in section. 3. The radiant heater according to claim 1, wherein the flat incandescent member has a curled portion at its lower edge.