JPH0113218Y2 - - Google Patents

Description

[Detailed explanation of the idea]

<Technical Field> The present invention relates to a combustor that vaporizes and burns liquid fuel (eg, petroleum). <Prior Art> Conventional oil burners have had a problem with high power consumption. This is because in forced convection oil combustors, the vaporizer is preheated using a sheathed heater, ceramic heater, etc. in order to raise the oil to the vaporization temperature, and then ignited. It is necessary to keep the vaporizer at a constant temperature by supplying electricity to the heater for a certain period of time, not only during combustion but also in steady state. Generally, the temperature of the vaporizer is sensed with a thermistor or the like, and when the temperature falls below a certain temperature, electricity is applied to the heater to raise the temperature of the vaporizer again.
The power consumption due to energization of this heater varies depending on the combustion method (Bunsen, pneumatic feed, rotary method, etc.), but in the Bunsen method, it is approximately 100~
It is about 120W. To reduce power consumption, a heat recovery body, which is part of the vaporizer, was placed inside the combustion flame or inside a radiator that also served as a visual effect.
However, in a combustor in which the radiator is removed in order to reduce costs, heat can only be recovered by the amount of heat that the combustion flame directly impinges on the heat recovery body, resulting in increased power consumption. Increasing the size of the heat recovery body increases preheating time and increases material costs, so there is a limit. <Purpose> In view of the above, the present invention aims to reduce power consumption in a combustor without a radiator. <Example> Hereinafter, an example of the present invention will be described based on the drawings. Figures 1 and 2 show an example of a Bunsen combustion type line burner.
3 is a liquid fuel suction pump, 4 is a combustion cylinder with a front glass plate 5, a hot air outlet 6 is bored at the upper end, and the lower end is fixed to a support piece 7 of the case body 1. A burner support stand 8 having a U-shaped cross section with an open upper surface is fixed to this support piece 7, and a line burner 9 is attached to the support stand 8. A brass carburetor 10 is installed between the right end of the line burner 9 and the pump 3, and a vaporized fuel injection nozzle 11 of the carburetor 10 is connected to the line burner 9. 12 is a spark plug installed in the flame port 9a of the line burner 9. A heat recovery cylinder 14 is provided in the combustion cylinder 4 above the carburetor 10 and is heated red-hot by the combustion flame of the burner 9. Further, a heat recovery body 15 is provided protruding from the main body 10a of the vaporizer 10, and a tip portion 15a of the heat recovery body 15 is disposed inside the heat recovery cylinder 14. A ceramic heater 19 is fixed to the main body 10a of the vaporizer 10 by a support piece 20, and the heat recovery body 1 made of brass with high heat conductivity is attached to the main body 10a.
5 is integrally formed, and the tip portion 15 of the heat recovery body 15
a is arranged above the right end burner port 9a of the burner 9. 21 is a thermistor attached as a temperature sensing element of the vaporizer 10. As shown in FIGS. 3 to 6, the heat recovery cylinder 14 is formed in a substantially U-shape that is open downward when viewed from the side, and includes a front plate 23 and a rear plate 24 having a large number of small holes 22, and a similar number of holes. an upper plate 25 having a small hole 22; an L-shaped bent piece 26 integrally formed at the lower ends of the front plate 23 and the rear plate 24;
3. It is composed of a right side plate 27 with a large number of small holes 22 that close the right end opening formed by the rear plate 24 and the upper plate 25, and an outer flange 28 is integrated at the lower end of each of the bent pieces 26 and the right side plate 27. It is formed with a bend. The lower opening 29a between the two bent pieces 26 is configured to be wider than the upper opening 29b formed by the front plate 23, the rear plate 24, and the upper plate 25. The left side of the lower opening 29a of the flange 28 is located above the burner port 9a at the right end of the burner 9, and the right side of the lower opening 29a is located above the base 1 of the heat recovery body 15.
5b is attached to the burner support stand 8 so as to accommodate the burner support base 8. Further, in the heat recovery tube 14, the hole diameters of the small holes 22 are different between the flame port 9a side of the burner 9 and the vaporizer main body 10a side. That is, the small hole 2 on the burner side
The small hole 22b on the carburetor main body side is formed larger than the small hole 2a. In other words, the small hole 22a on the burner 9 side
When the opening area of ). In addition, the shape of the heat recovery cylinder 14,
The heat recovery rate changes depending on the size. Therefore, the heat recovery body 15 is surrounded by the heat recovery cylinder 14 with an appropriate interval. Next, to explain the operation, the vaporized fuel heated by the vaporization heater 19, vaporized by the vaporizer 10, and ejected from the nozzle is combusted by the burner 9, and this heat exits from the outlet 6 of the combustion tube 4 and is sent to the blower C. Sent indoors. In this steady state, the heat recovery cylinder 14
is red-hot by the combustion flame from the flame port 9a at the right end of the burner 9, and the heat recovery body 15 receives radiant heat generated by the red heat of the heat recovery cylinder 14, heat conduction from the hot air existing in the internal space of the heat recovery cylinder 14, Direct heat from the flame A acts, and these heats are transmitted to the base 15b of the heat recovery body 15 and the vaporizer main body 10a by conduction and radiation, so that the vaporizer main body 10a is always at a high temperature, and the vaporization heater is heated. fulfill a function. Furthermore, since the vaporizer 10 is located inside the combustion tube 4, heat is also recovered by the hot air inside the combustion tube 4. Further, since the combustion flame that hits the upper surface of the heat recovery tube 14 has a larger opening area on the carburetor body side, the flame escapes through the small hole 22b on the carburetor body side. That is, the heat recovery body 15 is completely surrounded by combustion flame, and the heat recovery cylinder 1
Since the red-hot area of No. 4 also extends to the side of the vaporizer body, the degree of heat recovery by radiation increases. Note that the power consumption during combustion (including the power consumption of the blower, pump circuit, etc.) differs as follows depending on the presence or absence of the radiator and heat recovery cylinder 14.

[Table] Note that b above indicates that the small holes 22 of the heat recovery tube 14 are all the same diameter, and c indicates that the small hole 22b of the heat recovery tube 14 on the vaporizer body 1 side is larger than the diameter of the small hole 22a on the burner 9 side. This is the case when it is also considered large. When there is a heat recovery tube like this, the energy consumption is 30~30
Reduced power consumption by 40Wh, and additional heat recovery cylinder 1
If the diameters of the small holes 22 in No. 4 are different on the left and right sides, it is possible to further reduce the power consumption by about 10Wh. <Effect> As is clear from the above description, the present invention provides a combustor that includes a vaporizer that vaporizes liquid fuel and a burner that burns the vaporized fuel, in which a tip portion of the main body of the vaporizer is connected to the burner. A heat recovery body is provided so as to be located above the flame opening of the burner, and a heat recovery cylinder that becomes red-hot by the combustion flame of the burner is arranged so as to surround the tip of the heat recovery body, and a large number of A liquid fuel vaporizing type characterized in that a small hole is formed, and the small hole is set so that the opening area of the small hole on the side of the vaporizer body is larger than the opening area of the small hole on the burner side. It is a combustor. Therefore, according to the present invention, the vaporizer body reaches a high temperature through the heat recovery body due to the radiant heat from the heat recovery cylinder, the heat existing in the internal space of the heat recovery cylinder, and the heat of the burner flame. By simply providing a small heat recovery cylinder inside the body, there is almost no need to use a vaporization heater in steady state, making it possible to significantly reduce power consumption. Furthermore, since the combustion flame hitting the top surface of the heat recovery cylinder has a larger opening area on the side of the carburetor body, the flame escapes through the small holes on the side of the carburetor body. That is, the heat recovery body is completely enveloped by the combustion flame, and the red-hot area of the heat recovery cylinder also extends to the side of the vaporizer body, so there is an excellent effect of increasing the degree of heat recovery by radiation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a partially cutaway front view of the main part, Fig. 2 is a vertical sectional view of the same, Fig. 3 is a perspective view of the heat recovery cylinder, and Fig. 4 is a partially cutaway front view of the same. A front view, FIG. 5 is a plan view of the same, and FIG. 6 is a right side view of the same. 4... Combustion tube, 9... Burner, 10... Vaporizer, 14... Heat recovery tube, 15... Heat recovery body, 15
a...Tip, 22...Small hole, 22a...Small hole on the burner side, 22b...Small hole on the carburetor main body side, 23
...Front plate, 24...Rear plate, 25...Top plate, 26...
...Bent piece, 27...Right side plate, 28...Flange,
29a...lower opening, 29b...upper opening.

Claims (1)

[Scope of utility model registration request] In a combustor that includes a vaporizer that vaporizes liquid fuel and a burner that burns the vaporized fuel, a heat recovery body is provided in the main body of the vaporizer so that its tip is located above the flame port of the burner. , a heat recovery cylinder that becomes red hot with the combustion flame of the burner is arranged to surround the tip of the heat recovery body, and a large number of small holes are formed in the heat recovery cylinder, and the small holes are formed in small holes on the burner side. A liquid fuel vaporizing combustor characterized in that the opening area of the small hole on the side of the vaporizer body is set to be larger than the opening area of the hole.