JPH03225102A - Vaporization type burner - Google Patents

Abstract

PURPOSE:To make the mutual transfer from the state of weak combustion to the state of strong combustion smoothly and keep the state of combustion linear and make it possible to enlarge the width of variability at the same time by specifying the ratio of diameters of the holes of the nozzles on the side of a sub-burner and on the side of main burner. CONSTITUTION:A pair of nozzles 6 and 11 are connected in series to a vaporizer 4 connected to an oil delivery pump 2 and the nozzle 6 communicates with the nozzle 11. A sub-burner 18 for continuous burning is provided opposite to the nozzle 6 and a main burner 23 for intermittent combustion is provided opposite to the nozzle 11. The diameter A of the holes 8 of the nozzle 6 on the side of the sub-burner 18 and the diameter B of the holes 12 of the nozzle 11 on the side of the main burner 22 are formed to give the ratio of A and B from 1:1.32 to 1:1.34. With this constitution the pressure of jet of the nozzle 6 at the largest weak combustion and the pressure of jet of the nozzles 6 and 11 at the strong combustion can be set at substantially the same pressure, and the transfer between the strong state and weak state of the combustion can be smooth, and the width of thermal power variably can be extended with the combustion quantity in linear state.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention supplies liquid fuel to a vaporizer, vaporizes the liquid fuel in the vaporizer, and directs the vaporized gas through a nozzle to a burner. The present invention relates to vaporizing combustion appliances such as oil fan heaters, forced air supply and exhaust type oil hot air heaters, etc.

(Prior art) In conventional vaporization combustion equipment, after the vaporization heater preheats the vaporizer and reaches a predetermined vaporizable hot water temperature, an electromagnetic pump is driven, and the liquid fuel in the fuel reservoir is sequentially supplied to the vaporizer. The supplied liquid fuel is vaporized by the heat of the vaporization heater, and the vaporized gas is guided from the nozzle to the burner together with combustion air to be burned, and the amount of combustion is sent from the electromagnetic pump. It was increased or decreased by adjusting the amount of liquid fuel.

(Problems to be Solved by the Invention) In the conventional technology, when the combustion amount is extremely reduced, the ejection speed of vaporized gas from the nozzle decreases and the fuel supply at the burner nozzle no longer follows the combustion speed, so-called A flashback phenomenon occurs. As described above, in the conventional technology, there is a limit to the reduction in the amount of combustion, so when it is relatively warm, such as in early spring, there is a problem that even with the minimum amount of combustion, the room becomes too hot.

As a means to solve such problems, a pair of nozzles are connected to the end of a vaporizer connected to an oil pump, and a pair of burners are provided respectively corresponding to the ejection ports of these nozzles. Combustion of all burners creates a strong combustion state and the amount of combustion is adjusted by the oil pump, and combustion of any one burner creates a weak combustion state and the amount of combustion is adjusted by the oil pump and the amount of combustion is significantly adjusted. However, in such a device, since the diameters of the ejection ports are the same, it is difficult to maintain a balance between the gas ejection pressure of the nozzle and the combustion state, and as a result, the maximum weak calcining state When transitioning from the state to the minimum strong takayaki state, or from the minimum strong combustion state to the maximum weak combustion state, the gas ejection pressure during weak combustion and the gas ejection pressure during strong twist firing are not equal. The transition did not occur smoothly, and there was a limit to the range of variation during combustion.

The present invention solves the above problems and provides a vaporizing combustion appliance in which a pair of burners are provided opposite to a pair of nozzles, and can be switched between a weak combustion state and a strong combustion state.
The purpose is to smoothly transition between the weak combustion state and the strong twist firing state, and to expand the variable range of firepower.

[Structure of the Invention] (Means for Solving the Problem) The present invention connects a pair of nozzles 6 and 11 in series to the carburetor 4 connected to the oil pump 2, and A sub-burner 18 for continuous combustion is provided facing the other nozzle 11, and a main burner 22 for intermittent combustion is provided facing the other nozzle 11. The ratio of the ejection port diameter B of the nozzle 11 is set to 1:1.32 to 134.

(Function) With the above configuration, the ejection pressure of one nozzle 6 during maximum weak combustion and the pair of nozzles 6.1 during strong twist firing are reduced.
1 can be set to almost the same pressure, the transition from strong to weak combustion state can be smoothly performed, and the variable range of thermal power can be expanded while keeping the combustion amount in a linear state.

(Example) Next, one embodiment of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes a liquid fuel storage section, and an oil pump 2 such as an N magnetic type is fixed to this liquid fuel storage section 1. A vaporizer 4 is connected to this oil pump 2 via an oil pipe 3. It is connected.

This vaporizer 4 is made of cylindrical aluminum die-casting or brass, and is provided with a vaporization heater 5 such as a sheathed heater, as well as a thermistor (not shown) for detecting the vaporization temperature. 6 is a sub-burner side nozzle provided corresponding to a sub-bar, which will be described later;
This nozzle 6 is provided at approximately the center of the upper part of the outer periphery 4A of the vaporization chamber 7 formed in the vaporizer 4, and is perpendicular to the vaporizer 4. A spout 8 is provided at the tip of the nozzle 6. A return port 6A is provided on the opposite side of the nozzle 6.
A has a fuel return path 6B connected to the liquid fuel storage section 1.
is connected. 7A is a vaporization filter provided in the vaporization chamber 7. Reference numeral 9 denotes a needle shaft that is provided so as to be able to move forward and backward within the sub-burner side nozzle 6 by energizing and disconnecting the solenoid 10, and during combustion, the ejection port 8 is opened and the return port 6 is closed.
A, and during extinguishing, the spout 8 is closed and the return port 6 is closed.
A is a main burner side nozzle which is provided facing the main burner described later and has a spout 12 at its tip, and this nozzle 11 is used for the vaporization! A twenty-dollar shaft 15 is provided above the outer periphery 4A of the outlet 13 of the fuel cell 7 so as to be perpendicular to the carburetor 4, and moves forward and backward when the solenoid 14 is turned on and off. A first communication passage 16 whose one end is connected to the outlet 13 of the vaporization chamber 7 is connected to the main burner side nozzle 11 at the other end, and a second communication passage 17 whose one end is connected to the nozzle 11. The other end is connected to the sub-burner side nozzle 6, and these nozzles 6.11 are connected to the first and second communication passages 16.1.
It is serially connected to the vaporization chamber 7 via 7. 1
Reference numeral 8 denotes a sub-burner, and an opening 20 of this burner throat portion 19 is arranged to face the jet nozzle 8 at a distance, and primary air for combustion is sucked in by the vaporized gas spouted from the jet nozzle 8, and both are The mixture is mixed and combusted in the burner flame port 21. Further, 22 is a main burner, and the opening 24 of this burner throat portion 23 is arranged to face the jet port 12 at a distance, so that the vaporized gas and the primary air are mixed and burned at the burner flame port 25. It has become.

A spark plug 26 and a flame sensor 21 such as a thermocouple or a light sensor are provided near the burner mouth 21 of the sub-burner 18.

Furthermore, the diameter A of the spout 8 of the sub-burner side nozzle 6 is set to 0.40 IIm, and the diameter B of the spout 12 of the main burner side nozzle 11 is set to 0.53 mm, so that the ratio of the two is 1:1.32 to 1834, Preferably 1 to 1.33
is formed. Further, the opening area of the burner flame port 25 and burner throat portion 23 of the main burner 22 is the same as that of the burner flame port 21 of the sub-burner 18 and the burner throat portion 23 of the main burner 22.
The opening area of the main burner 22 is larger than that of the opening area of the
The combustion amount of the sub-burner 18 can be made larger than the combustion amount of the sub-burner 18, and the burner flame port 21 of the sub-burner 18 is provided within a range where the flame can be transferred from the burner flame port 25 of the main burner 22. Reference numeral 28 denotes a heat recovery plate disposed between the pair of burner nozzles 21 and 25 and standing upright on the vaporizer 4.

Note that while the device is in operation, the solenoid 14 for the main burner 22 is controlled by a control device (not shown) so that the main burner 22 is placed in an intermittent combustion state based on room temperature detection by a room temperature sensor (not shown). During operation, the solenoid 10 for the sub-burner 18 is controlled so that the sub-burner 18 is in a continuous combustion state.

Next, the operation of the above structure will be explained.

First, when a power switch (not shown) is turned on to start operation, the vaporization heater 5 is energized and heating of the vaporizer 4 is started. Then, detect the temperature of the vaporizer 4 from the thermistor,
When it is detected that the vaporizer 4 has reached a predetermined temperature at which liquid fuel (not shown) can be vaporized, the fuel pump 2 and the spark plug 26 are energized. And the liquid fuel is sent to the oil feed pump 2.
is sucked into the vaporizer 4 and supplied to the vaporizer chamber 7 of the vaporizer 4.
In the step, the liquid fuel is heated and vaporized, and the vaporized gas is supplied to the main burner side nozzle 11 through the first communication path 16, and further to the subburner side nozzle 6 through the second communication path 17. Then, the vaporized gas passes through the nozzle 6 in which the needle shaft 9 is retracted by the solenoid 10 and is ejected from the ejection port 8 to the burner throat portion 19 of the sub-burner 18. At the same time, combustion air is drawn into the burner throat part 19 of the sub-burner 18 by the force of this vaporized gas, and a mixed gas mixed with this combustion air is blown out from the burner flame port part 21, and this is the spark plug 2G.
ignition occurs and combustion begins in the sub-burner 18. At this time, the room temperature is low and a control signal is outputted from the ill m device (not shown) so that the combustion state is strong combustion, so after the ignition operation, the needle shaft 15 moves back and the jet nozzle 12 opens. , the vaporized gas in the vaporizer 4 is ejected from the ejection port 12, and the burner flame port 25
The vaporized gas ejected from the tank 18 is ignited by the flame of the sabot 18, and combustion is started, resulting in a strong combustion state. By adjusting the amount of liquid fuel sent from the oil pump 2, the amount of combustion in the sub-burner 18 and the main burner 22 can be adjusted in a strong combustion state.

Next, when the room temperature rises and a room temperature sensor (not shown) detects this or sets weak combustion, the control device outputs a signal to change the combustion state to a combustion state below the minimum combustion port in the strong combustion state, As a result, the solenoid 14 is actuated and the needle shaft 15 closes the spout 12.
The main burner 22 is extinguished by stopping the ejection of vaporized gas from the main burner 22. Therefore, only the sub-burner 18 continues to be in a combustion state, resulting in a weak combustion state.

When the room temperature falls again and the room temperature sensor detects this or sets strong combustion, the control device controls the maximum combustion in the weak combustion state l11;1. A signal to change to the above combustion state is output, whereby the solenoid 14 causes the needle shaft 15 to open the jet port 12, and the main burner 22 starts combustion in the same manner as described above. When the fire is extinguished, the needle shaft 9.15 closes each of the spout ports 8.12 to extinguish the fire, and at the same time, the return port 6A opens and the fuel in the vaporizer 4 is turned into liquid via the fuel return path 6B. It returns to the storage section 1.

As shown in FIGS. 4 and 5, in a weak combustion state where only the sub-burner 18 side burns, the sub-burner 18
The combustion amount is 600kcaQ/h to 1500kc
It can be adjusted within the range of aQ /h, that is, the ratio of the maximum and minimum combustion amounts on the sub-burner 18 side is 1:2.5. At this time, the gas pressure inside the vaporizer 4 is 0.038 kg/
cs2 to 0, 178 kg/c++2. In addition, in a strong combustion state where the main burner 22 and the sub-burner 18 burn, the combustion amount of the main burner 22 is 10
00 kcaQ/h to 2520 kcaQ/h, that is, the ratio of the maximum and minimum combustion amounts on the main burner 22 side is 1:2.5. Furthermore, the combustion amount of the sub-burner 18 is between 600 kcaQ/h and 1430 kcaQ/h.
h, that is, the maximum and minimum combustion amounts of the 18 sub-burners are 1:25, and the total combustion amount in the strong combustion state is 1600 kcaQ / h or 3950 k
caQ /h. And the gas pressure inside the vaporizer 4 is 0
．． 038ko/c■2 to 0.168kg/ca
+2, and the pressure inside the carburetor 4 in the minimum combustion state during strong twist firing is the same as the pressure inside the carburetor 4 in the minimum combustion state during weak combustion, so that the transition from the weak combustion state to the strong combustion state is smooth. It is possible to change the combustion port, and from 600kcaQ/h to 3950kc
aQ/! When set to 1, the combustion amount can be greatly varied by 6.6 times. Note that the diameter ratio of the jet ports 8 and 12 is 1:1.
If the ratio is less than 32 or 1:1.34 or more, the combustion state cannot be smoothly transitioned as described above, and the combustion amount cannot be controlled linearly.

In this way, in the above embodiment, the nozzle 6 is connected to the vaporizer 4.
．． 11 is connected, and the sub-burner 18 is made to face one nozzle 6, and the main burner 22 is made to face the other nozzle 11, so that both burners 18 and 22 can burn in a strong combustion state, and only the sub-burner 18 can produce a weak combustion state. By switching the combustion state, it is possible to set a large combustion range.

Diameter A of the spout 8 of the nozzle 6 on the sub-burner 18 side
By setting the ratio of the diameter B of the jet nozzle 12 of the nozzle 11 on the main burner 22 side to 1:1.32 to 134, the inside of the carburetor 4 is It is possible to maintain the same pressure, achieve a smooth transition in the combustion amount, and linearly control the combustion amount.
Moreover, the variable width can be increased.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications are possible.

[Effects of the Invention] The present invention connects a pair of nozzles in series to a carburetor connected to an oil feed pump, a sub-burner for continuous combustion is provided opposite to the one nozzle, and the other nozzle A main burner for intermittent combustion is provided opposite to the main burner, and the ratio of the outlet diameter of the nozzle on the sub-burner side to the outlet diameter of the nozzle on the main burner side is 1:1.32 to 1.34.
By forming the
In addition, it is possible to smoothly transition from a strongly twisted firing state to a weak combustion state, and the combustion state can be made linear, and the variable range can be increased.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway plan view with a partially enlarged cross section, FIG. 2 is an overall perspective view,
FIG. 3 is a sectional view of the carburetor, FIG. 4 is a graph of combustion amount, and FIG. 5 is a graph of pressure inside the carburetor. 2...Oil pump 4...Carburizer 6.11...Nozzle 8.12...Spout port 18...Sub burner 22...Main burner A, B...Caliber Satsumakan *= *C dyed rice field

Claims (1)

[Claims] A carburetor connected to an oil feed pump, a pair of nozzles connected in series to the carburetor, a sub-burner for continuous combustion provided opposite to the one nozzle, and a sub-burner opposed to the other nozzle. and a main burner for intermittent combustion provided at A vaporizing combustion appliance characterized by: