JP2568569Y2 - Heterogeneous fuel combustor - Google Patents

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 device capable of burning different fuels such as kerosene and light oil or waste oil.

[0002]

2. Description of the Related Art In a pot provided with a large number of small holes in a side wall,
A pot-type burner that supplies air from the small holes, supplies fuel into the pot, ignites, vaporizes, mixes, and burns the fuel in the pot, and guides the flame into the combustion chamber to completely burn. Are known.

[0003] Compared to a gasification type burner which burns the gaseous fuel by adding thermal energy to the fuel, the burner can stably burn even if the fuel type is different. A burner that burns oil, burns light oil, and burns waste oil mixed with kerosene and light oil has been put into practical use.

[0004]

As described above, the pot type burner has been practically used as a heterogeneous fuel combustor for burning kerosene and light oil, or kerosene and waste oil because of the wide variety of fuel types that can be burned. There is one that uses kerosene and switches to gas oil or waste oil and burns after stable combustion.

[0005] By the way, kerosene and fuel such as light oil and waste oil are
The viscosities are different, and this difference is that when the combustion amount is adjusted by an oil amount controller or the like, the fuel flow rate differs on the same scale. For this reason, this type of combustor always adjusts the amount of combustion while the operator observes the state of combustion, and if handled by a person who can not handle it, it may emit smoke and handling is very troublesome .

[0006]

The present invention relates to a very easy to handle heterogeneous fuel combustor, in which a pot 1 having a large number of small holes 2 in a side wall 1a is mounted in an air passage 3 to which combustion air is supplied. The oil tank 4 and the pot 1 are connected by a fuel pipe 5 and an electromagnetic pump 6
Is connected to an oscillator 9 via a monostable multivibrator 8, and the oscillator 9 receives a combustion amount signal of a burner controller 10 as an input and generates an oscillation frequency. And a fuel type selection switch 11 is attached to the monostable multivibrator 8 to change the conduction time of the semiconductor element 7 according to the fuel type.

[0007]

When the electromagnetic pump 6 operates, the fuel in the oil tank 4 is sucked up and sent to the pot 1 through the fuel pipe 5. Then, when the fuel sent into the pot 1 ignites,
The fuel is vaporized at the bottom of the pot 1 and starts burning by the air supplied from the small holes 2 formed in the side wall 1a of the pot 1. The fuel vaporized inside the pot 1 is mixed with the air while burning, and then burns in the upper part of the pot 1 and the combustion chamber following the pot 1.

On the other hand, the signal of the amount of combustion of the burner controller 10 is transmitted to the oscillator 9, and the oscillator 9 oscillates at an oscillation frequency corresponding to the signal of the amount of combustion. The oscillation frequency corresponding to the amount of combustion of the oscillator 9 is set in a variable state in advance. When the amount of combustion is small, the oscillation frequency is low, and when the amount of combustion is large, the oscillation frequency is high.

The output signal of the oscillator 9 is transmitted to the monostable multivibrator 8. Each time the output signal of the oscillator 9 is transmitted to the monostable multivibrator 8, the output of the monostable multivibrator 8 becomes H for a fixed time. H
The output is transmitted to the semiconductor element 7, and during the H output, the semiconductor element 7 becomes conductive and energizes the electromagnetic pump 6. For this reason, the internal piston of the electromagnetic pump 6 is driven by the oscillation frequency of the oscillator 9, and the fuel flow rate is controlled by the oscillator 9.

The monostable multivibrator 8 of the present invention is provided with a fuel selection switch 11 for changing the time during which the output is at H after receiving the input signal. Even though the drive frequency of the electromagnetic pump 6 hardly changes, the time during which the piston of the electromagnetic pump 6 stays at the drive position becomes longer.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 denotes a pot having a number of small holes 2 formed in a side wall 1a, 12 denotes a blower, 3 denotes an air passage to which combustion air sent from the blower 12 is supplied, and 1 pot is mounted in the air passage 3. It is. 4 is an oil tank, 6 is an electromagnetic pump mounted on the oil tank 4, 5 is a fuel pipe connecting the oil tank 4 and the inside of the pot 1, and the electromagnetic pump 6 is a fuel pipe 5
It is located in the middle of.

Reference numeral 13 denotes a preheating and ignition heater mounted in the pot 1 near the bottom surface, and 14 denotes a combustion body mounted in the pot 1, and a fuel gas vaporized near the bottom surface of the pot 1,
The mixing with the air sent from the small holes 2 is improved, and the fuel is completely burned in the combustion chamber 15 provided above the pot 1 and above the pot 1.

Reference numeral 10 denotes a burner controller including a timer element, various sensors, a microcomputer, and the like. The burner controller 10 outputs a control signal to the blower 14, the preheating and ignition heater 13, the electromagnetic pump 6, and the like based on an operation command of an operator. , So that the pot type burner performs stable combustion.

Reference numeral 9 denotes an oscillator that oscillates upon receiving a combustion amount signal from the burner controller 10, reference numeral 8 denotes a monostable multivibrator that receives the output of the oscillator 9, and reference numeral 7 denotes a semiconductor element that is turned on by the H output of the monostable multivibrator 8. Each time the semiconductor element 7 becomes conductive, the electromagnetic pump 6 drives the internal piston to supply fuel from the oil tank 4 to the pot 1. The oscillator 9 changes the oscillation frequency in response to the combustion amount signal, and the rate of change is always constant even when the type of fuel changes. When the oscillation frequency is low, the fuel flow rate is small,
The higher the value, the higher the fuel flow rate.

Reference numeral 11 denotes a fuel type selection switch for changing the duration of the H signal output from the monostable multivibrator 8. The maintenance time of the output H signal is changed by switching the fuel type selection switch 11. Therefore, when the fuel selection switch 11 set to kerosene is switched to light oil, the H signal output from the monostable multivibrator 8 becomes longer, and the time during which the electromagnetic pump 6 conducted by the semiconductor element 7 is excited becomes longer. It is. For this reason, light oil having a higher viscosity than kerosene was surely sent out to the pot 1 by the length of the drive time of the piston, and a combustion amount equal to that of kerosene could be obtained.

Although the embodiment has been described by the combination of the single-function oscillator 9 and the monostable multivibrator 8, this operation is incorporated in a microcomputer used in a recent controller to perform the same operation. The oscillator 9 may count the reference clock and output it at a constant count, and the monostable multivibrator 8 may count the reference clock to obtain the H output time.

In the case of the monostable multivibrator 8 having a single function, if the time of the H output is extended, the time of the L output is reduced. In some cases, the program may be simplified if the frequency is not changed. In this embodiment, although the frequency corresponding to the oscillator 9 is slightly changed by the fuel type selection switch 11, the effect obtained is not changed at all. is there.

[0018]

It is common practice to use a high-precision burner controller to simplify the operation of the combustor. And the part that we want to automate the most in heterogeneous fuel combustion equipment is the point about the fuel flow that differs for each fuel,
In such a case, as in the case of changing the degree of opening of the on-off valve, conventionally, automation is performed so that the flow rate changes by changing the drive frequency of the electromagnetic pump 6.

The purpose can be achieved by changing the drive frequency to a fuel suitable for the fuel every time the fuel is switched. However, in order to adjust the combustion amount in a plurality of stages, the plurality of drive frequency data must be changed. Must be set for each
It had to be a very complicated controller.

In this invention, one oscillator 9 for obtaining a drive frequency for adjusting the combustion amount and a monostable multivibrator 8 are provided, and a fuel type selection switch 11 is used to maintain the H output output from the monostable multivibrator 8. Since the time was changed for each fuel, the most complicated adjustment amount of the combustion amount in this type of controller was able to cope with different types of fuel with only one system, and the controller was extremely simplified.

As a result, the controller for the heterogeneous fuel combustor can be put to practical use at low cost, the handling of the heterogeneous fuel combustor can be simplified, and anyone can easily operate it.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a heterogeneous fuel combustion device according to the present invention.

FIG. 2 is a block diagram of a fuel pump driving unit of the heterogeneous fuel combustor of the present invention.

[Explanation of symbols]

 Reference Signs List 1 pot 1a pot side wall 2 side wall small hole 3 air path 4 oil tank 5 fuel pipe 6 electromagnetic pump 7 semiconductor element 8 monostable multivibrator 9 oscillator 10 burner controller 11 fuel type selection switch

Claims (1)

(57) [Scope of request for utility model registration] 1. A pot 1 having a large number of small holes 2 in a side wall 1a is mounted in an air passage 3 to which combustion air is supplied, and an oil tank 4 and the pot 1 are connected by a fuel pipe 5. In a pot-type burner in which an electromagnetic pump 6 is attached in the middle of 5, the input of a semiconductor element 7 for driving the electromagnetic pump 6 is connected to an oscillator 9 via a monostable multivibrator 8, and the oscillator 9 A heterogeneous fuel combustion apparatus characterized in that the transmission frequency is varied by inputting an amount signal, a fuel type selection switch (11) is attached to the monostable multivibrator (8), and the conduction time of the semiconductor element (7) is changed according to the fuel type.