JPS609208B2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed description of the invention] The present invention atomizes liquid fuel such as kerosene by centrifugal force, and then
In a combustion device that automatically shifts from diffusion combustion to vaporization combustion, combustion is always achieved at an appropriate excess air ratio by automatically changing the distribution of air amount to the diffusion combustion section and vaporization combustion section depending on the temperature of the vaporization chamber. The purpose is to be able to continue.

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a detailed view of the main part of FIG. In the figure, 1 is a substantially inclined cylindrical vaporizing cylinder in which a burner head 2 having a flame hole 3 is fitted, and 4 is a rotating cup directly connected to a rotating shaft 5 of a motor (not shown) via a connecting rod 6. The bottom is perforated to provide a ventilation passage 7, and the end after the perforation is bent inward into a U-shape to form an oil pan 8.
is formed.

Reference numeral 9 is located in a vaporizing chamber 10 that is formed of a protrusion surrounded by a thermally responsive body made of bimetal or the like directly connected to the rotating shaft 5, the vaporizing cylinder 1, the burner head 2, a rotary cup, and the like.

Reference numeral 11 denotes an air amount control plate which is held via a support rod 12 and a spring 13 so as to slide in the axial direction of the rotating shaft 5 in accordance with the displacement of the thermally responsive body 9, and is attached to the upper end opening of the rotating cup 4. It is provided so that the gap 14 is maintained. Reference numeral 15 denotes a rotary plate, one end of which is fixed to the outer circumferential wall of the rotary cup 4, and the other end bent into a plate shape so as to maintain a constant distance from the outer circumference of the lower end of the vaporizing cylinder 1.

Reference numeral 16 denotes a diffusion combustion chamber in which the fuel scattered in the form of mist from the rotary plate 15 is mixed with forced air and combusted, and 17 is a blower cylinder which is connected to the inside of the rotary cup 4 and to the diffusion combustion chamber 16 through ventilation holes 18 and 19, respectively. Distribute forced wind to.

This is an oil supply pipe whose tip is open to the oil receiver 8 of the rotating cup 4.

Next, the operation of the present invention will be explained. Now, when the rotating shaft 5 starts rotating at high speed due to the drive of the motor, the rotating cup 4, the rotating plate 15, the thermally responsive body 9, the air amount control plate 11, etc. rotate accordingly, and forced air is sent into the blower tube 17. send.

Next, when the liquid fuel is dripped from the fuel supply pipe 20 into the oil receiver 8, it is atomized and released from the tip of the rotating cup 4 due to centrifugal force, hits the inner circumference of the vaporizer tube 1, overlaps with subsequent particles, and becomes liquid. The liquid becomes a bottle and flows down to the lower end of the vaporizer cylinder 1 and drips onto the rotary plate 15. Here, the fuel dropped onto the rotating plate 15 is again carried to the tip of the rotating plate 15 by centrifugal force, and then atomized and released into the diffusion combustion chamber 16, where it is supplied from the ventilation hole 19. It mixes with forced air and ignites to cause diffuse combustion. The vaporizing cylinder 1 is heated by this diffused combustion heat, and the vaporizing chamber 10 gradually reaches the temperature of the fuel vaporizing atmosphere.
Once the vaporization tube 1 and the vaporization chamber 10 are heated, the fuel particles atomized by the rotary cup 4 evaporate and vaporize on the inner circumferential wall of the vaporization tube 1 and within the vaporization chamber I0. On the other hand, the forced air supplied from the ventilation hole 18 and flowing into the vaporization chamber 10 from the gap 14 formed by the upper end of the rotary cup 4 and the air amount control plate 11 becomes humid gas, and the flame of the burner head 2 The fuel is ejected from the hole 3, ignited by the above-mentioned diffusion combustion flame, and as the blue flame vaporizes and burns, the amount of fuel flowing out to the rotary plate 15 gradually decreases, and finally all the fuel evaporates and vaporizes in the vaporization chamber 10. As a result, the combustion in the diffusion combustion chamber 16 is gradually reduced, and the blue flame vaporization combustion in the flame hole 3 of the burner head 2 is expanded, and thereafter the vaporization tube 1 is heated by heat conduction from the burner head 2. This continues and eventually results in steady and stable blue flame vaporization combustion on the burner head 2. In the series of combustion transition processes as described above, the thermally responsive body 9 performs the following operations.

That is, the thermally responsive body 9 is set to respond to the atmospheric temperature in the vaporization chamber and curve when the temperature is high, and when the diffusion combustion starts, the atmospheric temperature in the vaporizing chamber 10 is also low and the thermally responsive body 9 is
2, and therefore the support rod 1 is attached to the thermally responsive body 9.
The gap 14 formed between the air amount control plate 11, which is held via 2 and a spring 13, and the upper opening □ of the rotary cup 4 is kept narrow, and as a result, during diffusive combustion, the vaporization chamber 1
Forced air flowing into the combustion chamber 1 is restricted and most of it flows into the diffusion combustion chamber 1.
6, the primary air necessary for diffusive combustion is secured, and the forced air that passes through the narrow gap 14 and the flame hole 3 of the burner head 2 is used as secondary air to flow into the wake of the diffusive combustion flame. Supplied. However, as the atmospheric temperature of the vaporization chamber 10 rises, the thermally responsive body 9 gradually curves until it finally curves to the position 9' in FIG. As the gap 14 widens to 14', the forced air flowing into the vaporizing chamber 10 increases, and the premixing air required for blue flame vaporization combustion is secured as primary air in the 3rd part of the flame hole of the burner head 2. On the other hand, the forced wind flowing into the diffusion combustion chamber 16 decreases and the flame hole 3
It is supplied as secondary air to the downstream of the blue flame vaporization combustion.
Since the present invention is configured as described above, if the thermally responsive body 9 in the present invention is omitted, the total amount of air is the sum of the amounts of air required for each combustion, and the excess air ratio is This causes problems such as a decrease in efficiency, an increase in the size of the blower, and poor flame transfer when transitioning from diffusion combustion to blue flame vaporization combustion.

However, if the configuration of the present invention is used, the area of the ventilation passage is changed depending on the atmospheric temperature of the vaporization chamber 10, and the amount of air required during diffusive combustion, combustion transition, and blue flame vaporization combustion is automatically and variably distributed. As a result, the excess air ratio can be kept to a minimum, and as a result, when this device is incorporated into equipment, not only high efficiency can be obtained, but the blower can also be made smaller and the combustion transition is smoother. For practical purposes, such as being carried out in
It has extremely effective effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a detailed view of the main part of FIG. Heat-responsive body...9, vaporization chamber...10. Diamond/Figure 2

Claims (1)

[Claims] 1. In a combustion device that automatically shifts from diffusion combustion to vaporization combustion after fuel is atomized by centrifugal force, a heat-responsive body that operates depending on the ambient temperature of the vaporization chamber is installed in the vaporization chamber to control the flow of fuel into the vaporization chamber. A liquid fuel combustion device characterized by controlling the amount of air.