JPH06257744A - Liquid fuel combustion apparatus - Google Patents

Abstract

PURPOSE:To reduce parts materials and improve assembling work for reduction of the cost by interposing a thermostat for detecting the temperature of an evaporation cylinder between the evaporation cylinder and a placement table. CONSTITUTION:A protruded portion 19 of an evaporation cylinder 1 and a recessed portion 15a of a placement table 15 are fitted to each other, holding a thermostat with a cross-shaped section therebetween. For attaching the thermostat in an assembling of a liquid fuel combustion apparatus, the thermostat is first placed in the recessed portion 15a in the placement table 15. Thereupon, both wings of the thermostat are placed on a flat plane portion in the recessed portion 15, and the lower portion of the same is inserted into a through-hole 15b in the recessed portion 15a. With this situation, once the protruded portion 19 of the evaporation cylinder 1 is fitted in and placed on the recessed portion 15, the upper portion of the thermostat is fitted in a hole 19a provided in the protruded portion 19 of the evaporation cylinder 1. Once the evaporation cylinder 1 is fixed to the placement table 15 by screwing evaporation cylinder with fixing screws 16, 16 in such a manner, the thermostat is also fixed simultaneously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion apparatus in which liquid fuel is vaporized, mixed with combustion air and sent to a burner head for ignition and combustion. More specifically, the present invention relates to a vaporization cylinder. The present invention relates to a liquid fuel combustion apparatus which does not require a component material for fixing a temperature detecting thermostat, improves assembly workability and reduces manufacturing cost.

[0002]

2. Description of the Related Art FIG. 2 is a longitudinal sectional view showing an example of the vicinity of a combustion portion of a conventional liquid fuel combustion apparatus. Reference numeral 1 is a vaporization tube that vaporizes liquid fuel and mixes it with combustion air to produce a combustible gas mixture. Reference numeral 2 is an electric heater embedded in the side wall of the vaporization tube 1. Reference numeral 3 denotes a burner head which is placed on the upper portion of the vaporization cylinder 1 to form a combustion flame, 4 denotes a plurality of flame holes provided in the burner head 3, and 5 denotes a wire net tightly wound around the outer peripheral surface of the burner head 3. .

Reference numeral 6 denotes an annular flame holding ring provided around the burner head 3 to prevent the spread of the flame and protect the combustion flame from disturbance. Reference numeral 7 is a thermostat having a cross-shaped cross section attached to the side wall of the vaporization cylinder 1 to detect its temperature, 9 is a fixing metal fitting for fixing the thermostat 7 to the side wall of the vaporization cylinder 1, and 10 is a vaporization cylinder for the fixing metal fitting 9. It is a screw fixed to 1. Reference numeral 11 is a nozzle portion for sending combustion air into the vaporizing cylinder 1, and 12 is a needle pipe provided in the central portion of the nozzle portion 11 in the longitudinal direction. Reference numeral 13 is a throttle portion attached to the upper part of the vaporization cylinder 1, and 14 is a mixing plate attached to the upper portion of the throttle portion 13 inside the burner head 3.

Reference numeral 15 is a stand on which the vaporization tube 1 is placed, and 16 is a vaporization tube fixing screw for fixing the vaporization tube 1 to the stand 15. Reference numerals 17 and 18 denote a primary combustion flame and a secondary combustion flame ignited by an ignition means (not shown) such as a discharge spark.

Next, the operation of the liquid fuel combustion apparatus configured as described above will be described. First, in the assembly work of the liquid fuel combustion apparatus, in order to attach the thermostat 7 to the side wall portion of the vaporization tube 1, the thermostat 7 is held by the fixing metal fitting 8, and the fixing metal fitting 8 is attached to the vaporization cylinder 1 by the screw 10. Fix it.

The combustion process of the liquid fuel combustion apparatus assembled as described above is as follows. First, when a power switch (not shown) is turned on and the electric heater 2 is energized, the vaporization cylinder 1 has a temperature (about 250 ° C. to 300 ° C.) necessary for vaporizing fuel.
Preheated to ℃). The temperature of the vaporization cylinder 1 at this time is detected by the thermostat 7, and the power is turned off. When the preheating is completed in this way, the combustion air is sent from the nozzle portion 11 into the vaporization cylinder 1, and the blowing pressure of the combustion air causes the liquid fuel to be extruded in a mist form from the needle pipe 12 into the vaporization cylinder 1. Fuel and air are fed at a predetermined ratio.

The fuel sent into the vaporizing cylinder 1 is vaporized by the vaporizing cylinder 1.
It is vaporized by the heat inside and mixes with combustion air to produce a combustible gas mixture. Then, it is sent to the burner head 3 through the throttle portion 13 and the mixing plate 14, is rectified there, passes through the flame holes 4 and the wire mesh 5, is jetted at a predetermined jet pressure, and is ignited by an ignition means such as a discharge spark. The primary combustion flame 17
And the secondary combustion flame 18.

[0008]

In the conventional liquid fuel combustion apparatus configured as described above, when the thermostat 7 is mounted, the fixing metal fitting 8 and the screw 10 are indispensable, so that the number of parts is large and the material is large. It is expensive, and the assembly work is complicated and takes a long time.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a liquid fuel combustion apparatus in which the material for parts is reduced and the assembling work is improved to reduce the manufacturing cost. .

[0010]

In the liquid fuel combustion apparatus according to the present invention, a thermostat for detecting the temperature of the vaporizing cylinder is provided between the vaporizing cylinder and the stand.

[0011]

The thermostat is interposed between the vaporization tube and the stand, and the vaporization tube is fixed to the stand by using the vaporization tube fixing screw.

[0012]

1 is a vertical sectional view showing a first embodiment of the present invention. The same parts as those in the conventional example of FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 1 is a vaporization cylinder in which the electric heater 2 is embedded in the side surface portion, 19 is a convex portion provided on the bottom surface portion of the vaporization cylinder 1, and 19a is a hole portion provided in the central portion of the convex portion 19. Further, 15 is a stand on which the vaporization cylinder 1 is placed, and a recess 15a having a through hole 15b in the central portion of the upper surface center portion thereof.
Are formed.

Then, the convex portion 19 of the vaporizing cylinder 1 and the stand 15 are provided.
The thermostat 7 having a cruciform cross-section is fitted between the concave portion 15a and the concave portion 15a, and is fixed by the vaporization tube fixing screw 16. The lead wire of the thermostat 7 is taken out from the lower part and guided to the outside.

Next, the operation of the present invention constructed as above will be described. To mount the thermostat 7 in the assembly work of the liquid fuel combustion apparatus, first, the thermostat 7 is placed in the recess 15a of the stand 15. At this time, both blade portions of the thermostat 7 are placed on the flat surface portion in the recess 15a, and the lower portion is inserted into the through hole 15b of the recess 15a.

In this state, when the projection 19 of the vaporization cylinder 1 is fitted into the recess 15a of the stand 15 and placed, the upper part of the thermostat 7 is a hole 19a provided in the projection 19 of the vaporization cylinder 1.
To fit. In this way, when the vaporization cylinder fixing screws 16 and 16 are screwed to fix the vaporization cylinder 1 to the stand 15, the thermostat 8 is also fixed at the same time. The combustion process of the liquid fuel combustion apparatus assembled as described above is performed by the thermostat 7 that detects the temperature of the vaporization cylinder 1 when the liquid fuel burns.
Other than that, the description is omitted because it is the same as the case shown in the conventional example (FIG. 2) except for the position.

In the above description, the cross-shaped thermostat 7 is used.
Although the case where the vaporization cylinder 1 and the pedestal 15 are fitted to the concave portion and the through hole shown in the above, the present invention is not limited to this, and a thermostat of an appropriate shape can be used. The vaporizing cylinder 1 and the stand 15 may be provided with corresponding mounting portions.

[0017]

As is clear from the above description, in the liquid fuel combustion apparatus according to the present invention, the thermostat is fixed at the same time when the vaporization cylinder is fixed to the stand.
It is possible to omit parts materials such as metal fittings and screws, which have been conventionally used when mounting the thermostat, improve the assembly workability, and further reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing an example of a conventional liquid fuel combustion apparatus.

[Explanation of symbols]

 1 Vaporization cylinder 3 Burner head 6 Flame holding ring 7 Thermostat 15 Stand 16 Screw for fixing vaporization cylinder

Claims (1)

[Claims] 1. An upper part of the vaporizing cylinder having a vaporizing cylinder for vaporizing liquid fuel and mixing it with combustion air to produce a combustible gas mixture, a thermostat for detecting the temperature of the vaporizing cylinder, a flame holding ring and the like. In a liquid fuel combustion apparatus comprising a burner head for forming a combustion flame and a stand or the like provided below the vaporization cylinder for mounting and fixing the vaporization cylinder or the like, the thermostat is provided between the vaporization cylinder and the stand. A liquid fuel combustion apparatus characterized in that it is installed in the.