JPH01314804A - Pot burner - Google Patents

Abstract

PURPOSE:To hold the temperature of the bottom of a pot rapidly at a temperature favorable for vaporization of liquid fuel by separably providing a heat insulator in the bottom, and separating the insulator from the bottom when a temperature sensor for detecting the temperature of the bottom detects a predetermined temperature or higher. CONSTITUTION:A heat insulator 6 provided with a heat resistant heat insulating material 6b is elastically provided at the side in contact with the bottom 1a of a pot 1 by a spring 8 on a platelike retainer frame 6a, a coiled spring 7 which is made of a memory shape to have no elastic force due to contraction, for example at 45 deg.C or lower and to generate an elastic force due to elongation, for example, at 450 deg.C is interposed between the bottom 1a and the insulator 6, the insulator is brought into contact with the bottom 1a at 450 deg.C or lower of the bottom by means of the elastic force of the spring 8, and when it becomes 450 deg.C, it is separated from the bottom 1a. Accordingly, if the bottom of the pot is at 450 deg.C or lower, it prevents heat from escaping from the bottom by the insulator 6, while if it becomes 450 deg.C or higher, the heat is dissipated from the bottom.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bot burner that burns liquid fuel such as kerosene, light oil, and A-heavy oil.

(Prior Art) A bot burner is known in which a liquid fuel such as kerosene or light oil is burned in a pot having air holes formed in the wall surface.

Combustion in this bot burner involves igniting the liquid fuel supplied to the bottom of the pot, vaporizing the fuel with the combustion heat, mixing it with air supplied from the air hole, and burning the fuel. The temperature at the bottom of the pot for vaporizing is determined by the amount of heat radiated from the combustion flame burning in the pot,
It is determined by the amount of latent heat when the liquid fuel vaporizes and the amount of heat that escapes from around the pot.

(Problem to be solved by the invention) However, this temperature varies greatly depending on the combustion state of the fuel, etc. If the temperature is too high, it will damage the bottom of the pot, and if it is too low, components with a high distillation temperature contained in the fuel will It remains at the bottom of the pot, causing problems such as preventing the flow of fuel at the bottom of the pot.

That is, when there is little liquid fuel supplied into the pot,
Mixing of the vaporized fuel and air is completed relatively quickly, and the combustion occurs at a height close to the bottom of the pot, as shown by a in Figure 4, so the bottom receives a lot of radiant heat and becomes high temperature, resulting in poor quality. Therefore, if the liquid fuel is burned for a long period of time under such conditions, the bottom of the pot will be easily damaged.Also, when there is a large supply of liquid fuel, a large amount of latent heat is required for vaporization, and it takes a long time to mix the vaporized fuel with air. It takes. This is completed at the top of the pot. That is, as shown by b in FIG. 5, since the fuel is burned at a height away from the bottom of the pot, the amount of radiant heat to the bottom of the pot is smaller than when the amount of liquid fuel is small.

Therefore, the components contained in the liquid fuel that have a high distillation temperature cannot be completely vaporized and are generated as carbon, tar, etc. at the bottom of the pot, which obstructs the flow of fuel at the bottom of the pot and prevents its vaporization.

This tendency is most noticeable for liquid fuels with high distillation temperatures.

The object of the present invention is to obtain a pot burner free of such defects.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a heat insulator at the bottom of the pot so as to be able to come and go as desired, and a temperature sensor for detecting the temperature at the bottom. The heat insulator is made to separate from the bottom of the pot when the temperature at the bottom is detected to be above a certain level.

(Function) In the bot burner having the above configuration, for example, if the detection sensor detects 450°C, the heat insulating body that contacts the pot bottom part is separated, and when the pot bottom temperature is 450°C or lower, The heat insulator prevents heat from escaping from the bottom of the pot, so that the bottom of the pot approaches 450° C., which is preferable for fuel vaporization. However, when the temperature exceeds 450° C., the damper separates from the bottom of the pot, causing heat to be released from the bottom. Therefore, the temperature at the bottom approaches 450°C. Therefore, the above-mentioned problems do not occur.

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawing, 1 is a pot, 2 is a large number of air holes provided in several stages on the peripheral wall of the pot 1, 3 is an air chamber provided so as to surround the pot 1, and 4 is a ventilation duct 5 in the air chamber 3. The structure of these blowers is the same as that of a typical bot burner.

In the present invention, a heat insulator 6 is provided on the bottom portion 1a of the pot 1 so as to be able to come into contact with and be separated from the pot 1, and a temperature sensor 7 is provided to detect the temperature of the bottom portion 1a. The heat insulating body 6 is separated from the bottom 1a when a temperature higher than a certain temperature is detected.To explain this in more detail, in the one shown in FIG. The heat insulating body 6 coated with a heat-resistant heat insulating material 6b is elasticized by a spring 8 toward the side that contacts the bottom portion 1a, and a memorized shape is formed between the bottom portion 1a and the heat insulating body 6, for example, at temperatures below 450°C. It shrinks and has no elasticity, but 4
A coil spring is interposed that stretches at 50°C and generates an elastic force, and when the temperature of the bottom part is below 450°C, the heat insulator 6 is brought into contact with the bottom part la by the spring force of the spring 8, and when the temperature reaches 450°C, the It was made to move away from the bottom part 1a. Note that reference numeral 12 indicates a baffle piece provided to guide the flow of air toward the bottom la side.

The one shown in FIG. 2 has an electric heater 9 inside the heat insulator 6.
was provided so that the bottom part of the bot burner was heated at the beginning of insulation. Incidentally, if there is a concern that the temperature of the bottom portion 1a may rise too much, a through hole 1 is provided in the heat insulator 6 as shown in FIG.
1, when the heat insulating body 6 is separated from the bottom part 1a, combustion air supplied from the blower 4 also flows into the air chamber 3 through the through hole 11, thereby causing the bottom part 1
It is possible to separate the part a and suppress the temperature rise.

The one shown in FIG. 3 uses a thermistor as the temperature sensor 7, and when the thermistor detects a temperature above a certain level at the bottom la, the heat insulator 6 having a space at the top is separated from the bottom la. More specifically, the heat insulator 6 is supported on one side of the lever 13, and the heat insulator 6 supported by the lever 13 is brought into contact with the bottom La side on the other side of the lever 13. ie, a tension spring 14 that acts in the direction of pushing one side of the lever 13 upward, and an actuation device 15 that acts in the direction of pulling down one side of the lever 13 against the spring force of the spring 14 by energizing the solenoid. established,
The actuating device 15 is configured to actuate the actuating device 14 to separate the heat insulator 6 from the bottom portion 1a when a thermistor as the temperature sensor 7 detects a certain temperature level above the bottom portion 1a.

In the figure, 1B is a control section.

(Effects of the Invention) As described above, according to the present invention, a heat insulating body is provided at the bottom of the pot so as to be able to come into contact with and be separated from the pot, and a temperature sensor is provided to detect the temperature of the bottom. The heat insulating body is moved away from the bottom of the pot when the temperature is detected, so when the bottom of the pot is below a certain temperature, the heat insulating body can prevent heat from radiating from the bottom, and when the bottom of the pot is below a certain temperature, Since the heat insulating body is separated from the bottom, the temperature of the bottom can be maintained at a temperature as favorable as possible for vaporizing the liquid fuel.

[Brief explanation of the drawing]

FIG. 1 is a cut side view showing one embodiment of the present invention, FIGS. 2 and 3 are cut side views showing other embodiments, and FIGS. 4 and 5 are explanations explaining combustion in a pot burner. It is a diagram. 1...Pottro...Insulation Body 7...Temperature sensor Ko 1 Cause Figure 3

Claims (1)

[Claims] A heat insulating body is provided at the bottom of the pot so that it can be freely moved toward and away from the pot, and a temperature sensor is provided to detect the temperature of the bottom, and when the temperature sensor detects a temperature above a certain level at the bottom, the heat insulating body is separated from the bottom of the pot. A pot burner made of