JPH0120527Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a rotary vaporizing burner, in which a vaporizing cylinder is rotatably arranged in the center of a combustion disk with many flame ports arranged on the upper surface and a gas chamber inside. The petroleum oil is communicated with the gas chamber and air is blown into the vaporization cylinder, where the petroleum is vaporized and mixed with air, and this mixture is sent to the gas chamber and ejected from the flame port to perform vaporization combustion. The present invention relates to a heating device equipped with such a burner.

A conventional example of this type of burner will be explained based on FIG. Reference numeral 1 denotes a combustion disk having a large number of flame ports 2 arranged on its upper surface and a gas chamber 3 inside. A blower 5 is provided in the blower chamber 4 at the bottom of the combustion disk 1, and a rotating shaft 6 of the blower 5 protrudes above the center of the combustion disk 1, and a central cylindrical vaporizing cylinder 7 with an open bottom end is fixed to its tip. There is. The gas chamber 3 and the inside of the vaporizing tube 7 are communicated with each other by a gas collecting tube 9, and the blowing chamber 4 and the inside of the vaporizing tube 7 are connected by a plurality of blowing tubes arranged around the outer periphery of the gas collecting tube 9 and passing through the gas chamber 3. 8.
Further, an oil feed pipe 10 is introduced into the inside of the vaporization cylinder 7, and supplies liquid fuel that is pressure-fed from an oil feed pump 11 to the inner surface of the vaporization cylinder 7. Reference numeral 12 denotes a solenoid valve which is opened by energization and returns a portion of the liquid fuel pumped by the oil feed pump 11 to the upstream side of the oil feed pump 11, thereby reducing the amount of oil supplied to the vaporization cylinder 7. An intake port 12 is opened below the ventilation chamber 4, and the opening area can be changed by a damper 14. 15 is damper 1
4 is a solenoid that drives intake port 1 when energized.
The opening area of No. 3 is reduced to reduce the amount of air blown. Reference numeral 16 denotes a raw fuel ejection gap provided between the open lower end of the carburetor cylinder 7 and the combustion disk 1, and an ignition plug 17 is disposed opposite to this gap 16.

To explain the operation of the above configuration, first, the blower 5 is driven to blow air into the vaporizing tube 7 from the blowing pipe 8, and at the same time, the vaporizing tube 7 is rotated. Next, when the oil feed pump 11 is energized, the liquid fuel is supplied from the oil feed pipe 10 to the inner surface of the vaporizer cylinder 7, and the supplied fuel spreads inside the vaporizer cylinder 7 in a thin film form and enters the ejection gap 16.
The fuel is atomized, ignited by the ignition plug 17, and the vaporizer cylinder 7
It forms a live combustion flame around it. When the vaporization tube 7 is heated by raw combustion, the fuel diffused on the inner surface of the vaporization tube 7 receives vaporization heat and vaporizes, and this vaporized fuel is sent from the gas collecting tube 9 to the gas chamber 3 while mixing with air. The raw combustion flame is ignited by ejecting from the flame port 2, and a vaporized combustion flame is formed at the flame port 2. However, this conventional example has the following problems. In other words, when the burner is used as a heating source for hot water, for example, the combustion is turned on by thermo-operating so that a predetermined hot water temperature is obtained.
It is necessary to control OFF. However, when fuel is supplied again for re-ignition after combustion is turned off during thermo-operation, if the vaporizer cylinder 7 is not sufficiently cooled, the fuel will instantly vaporize and be sent to the gas chamber, causing the ignition plug 17 to There was a problem that the ignition could not be done. One possible way to solve this problem is to lengthen the combustion OFF time during the thermostat operation and cool the carburetor cylinder 7 during that time. There is a problem in terms of the hot water characteristics. Another possible method is to provide a spark plug near the flame port 2 and ignite the fuel when the fuel vaporizes instantaneously. This method is effective when the vaporizer tube 7 is sufficiently heated, but if the temperature of the vaporizer tube 7 drops slightly and the air-fuel mixture is ejected from both the flame port 2 and the ejection gap 16, Since both fuel mixtures are in a lean state, a problem arises in that ignition is impossible with either spark plug.

The present invention is intended to solve the problems of the conventional example described above.The configuration of the present invention will be explained below based on an illustrated embodiment, and the differences from the conventional example will be explained below. An electromagnetic valve 19 is separately installed in the branched oil feed pipe 18 , and the tip of the oil feed pipe 18 is made to face the lower inner circumferential wall near the open lower end of the vaporizer cylinder 7 . In addition, a number of holes 20 are provided in the lower peripheral wall of the carburetor 7 facing the oil feed pipe 18.
has been drilled. Reference numeral 20 denotes an air introduction tube which surrounds the rotating shaft 6 and communicates with the blowing chamber 4 at the lower end and with the opening 22 at the top of the vaporization tube 7 at the upper end.
1 prevents overheating in the vaporizing cylinder 7, particularly at the fuel supply point from the oil pipe 10, by allowing air to flow through the cylinder, and also supplies secondary air from the live combustion flame from the center. Reference numeral 40 denotes a control unit that controls combustion by controlling the oil feed pump 11 and the like as much as possible to reach a set temperature. FIG. 3 shows an embodiment of the electric circuit of the control unit 40, in which a first timer circuit 25 and a blower are connected between the power switch 23 and the first thermoswitch 24, which are interposed in the power line. 5 are respectively connected to the first thermo switch 24.
A second timer circuit 2 is connected between the lines on the output side of the
6, third timer circuit 27, oil pump 11,
A solenoid valve 12, a solenoid 15, a fourth timer circuit 29, and a solenoid valve 19 are connected to each other in series with a second thermoswitch 28. 1st above
~The fourth timer circuit is composed of a CR type timer and a relay, and only the third timer circuit 27 operates the relay for a certain period of time after the energization is stopped, and the other timer circuits operate the relays for a certain period of time after the energization starts. It's designed to encourage you. A normally closed switch 30 is opened when the relay of the second timer circuit 26 is activated, and is connected in series to the first timer circuit 25. 3
1 is a normally open switch that is closed when the relay of the third timer circuit 27 is activated, and is connected in series with the blower 5. The blower 5 also has a first thermoswitch 24.
The power is also supplied from the power line on the output side. 32 is a normally closed switch that opens when the relay of the second timer circuit 26 is activated;
1 is connected in series. 33 is a normally open switch that closes when the relay of the fourth timer circuit 29 is activated, and is connected in series to the solenoid valve 19. The first thermoswitch 24 is configured to open at a temperature higher than the temperature at which the second thermoswitch 28 closes. 35 is a normally open switch connected in parallel with the second thermo switch 28, and the first timer circuit 25
It closes when the relay is activated. The first timer circuit 25 is configured to discharge charge only when the power switch 23 is opened. The operation of the above configuration will be explained below based on the time chart shown in FIG. 4 and the tapped water temperature curve shown in FIG.

First, when the power switch 23 is turned on, the first thermo switch 24 is closed because the hot water temperature is low, and the second thermo switch 24 is closed.
The thermo switch 28 is open. Accordingly, the blower 5 is energized to blow air into the vaporizer cylinder 7, and the vaporizer cylinder 7 is rotated. At this time, the second timer circuit 26 is energized at the same time, so the normally closed switches 30 and 32 are opened, and the oil pump 1
1 is not driven, and prepurge is performed during this time. When the second timer circuit 26 times out, the normally closed switches 30 and 32 return to their original states, so the oil pump 11 is driven. At this time, the first timer circuit 25 is also energized, so the normally open switch 35 is closed, so the solenoid 15 and the solenoid valve 12 are energized, and the amount of fuel supplied and air blown from the oil pump 11 is reduced to a low capacity. It is sent to the vaporizer cylinder 7. Then, the supplied fuel is scattered through the jet gap 16 and the hole 20 in the lower peripheral wall by the rotational force of the vaporizer tube 7, and is ignited by the spark plug 17 to form live combustion. This low-capacity initial fuel is supplied until the first timer circuit 25 times up. After the time-up, the normally open switch 35 returns, and the fuel supply to the carburetor 7 is interrupted by the electromagnetic valve 12 and the solenoid 15. It is done with great power because it is done in a sacrificial manner. If the vaporizer tube 7 is heated by the initial raw combustion in this way, the vaporizer tube 7 will be heated as in the conventional example.
An air-fuel mixture is generated inside the gas chamber 3 and sent to the gas chamber 3, and is ejected from the flame port 2 to form a vaporizing combustion flame. Then, when the hot water temperature rises due to vaporization combustion and reaches a constant temperature T2, the first thermoswitch 28 closes, so vaporization combustion is performed at a low capacity, and when it rises further and reaches the set temperature T3, the first thermoswitch The switch 24 opens, the power supply to the oil pump 1 is cut off, and combustion stops. After the combustion stops, the relay of the third timer circuit 27 is activated and the normally open switch 31 is closed. The blower 5 is subsequently energized and post-purge is performed. When the combustion stops, the hot water temperature gradually decreases, and when the temperature drops to the set temperature T3, the first thermoswitch 24 is reset, and this reset causes pre-purging to be performed and then fuel is supplied to the carburetor cylinder 7 again. It becomes. And this time the second
Since the thermo switch 28 is in the closed state, the operation is performed at low capacity, and the relay of the fourth timer circuit 29 operates for a certain period of time (approximately 5 seconds), so the normally open switch 33 is closed and the solenoid valve 19 is opened. , fuel is supplied to the carburetor cylinder 7 from both the oil feed pipes 10 and 18, and the fuel supplied from the oil feed pipe 18 is supplied to the carburetor cylinder 7.
Even if the fuel is at a high temperature, it is reliably scattered as raw fuel from the hole 20 and the ejection gap 16, and is ignited by the spark plug 17 to form raw combustion, and the raw combustion flame is ejected from the flame port 2. The mixture is ignited smoothly and reliably.

As explained above, the present invention has a combustion disk with a large number of flame ports on the top surface and a gas chamber inside.
A hollow cylindrical vaporizing cylinder with an open lower end is rotatably arranged so as to have an ejection gap between it and the open lower end, the vaporizing cylinder and a gas chamber are communicated with each other, and air is blown into the vaporizing cylinder, The oil feed pipe to the carburetor cylinder is branched so that one oil feed pipe faces the upper inner surface of the carburetor cylinder, and the other oil feed pipe faces the lower inner surface near the open lower end of the carburetor cylinder via a solenoid valve, and the above-mentioned injection gap is The heating device is equipped with a burner having a spark plug facing the burner, and is equipped with a control unit that controls combustion at a set temperature, and the solenoid valve is opened for a set time during reburning after combustion has stopped. For example, in the case of a hot water heating device, even if combustion occurs intermittently during thermostat operation to control the hot water temperature to the set temperature,
During the re-burning, live combustion is reliably carried out for a certain period of time, so there is no problem of inability to ignite as in the conventional case, there is no deterioration of the hot water tapping characteristics, and the result is an extremely practical effect.

In this embodiment, the vaporizer tube 7 facing the oil feed pipe 18
According to this example, even if the lower part of the vaporizer tube 7 is at a temperature that causes the Leidenfrost phenomenon, it can be reliably dispersed from the holes 20, preventing re-combustion. This has the effect of making it more reliable.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view showing a conventional burner;
4 to 4 show an embodiment of the present invention, FIG. 2 is a vertical sectional view of a burner, FIG. 3 is an electric circuit diagram, and FIG. 4 is a time chart. FIG. 5 is an explanatory diagram. 1... Combustion disk, 2... Burner port, 3... Gas chamber, 7
...Carbonizer cylinder, 10...Oil pipe, 16...Ejection gap, 17...Ignition plug, 18...Oil pipe, 19...
Solenoid valve, 40...control unit.

Claims (1)

[Scope of utility model registration request] A hollow cylindrical vaporizing tube with an open bottom end is rotatably arranged in the center of a combustion disk with a large number of flame ports on the top surface and a gas chamber inside, with an ejection gap between it and the open bottom end. The carburetor and the gas chamber are connected to each other, and air is blown into the carburetor, and the oil pipe to the carburetor is branched to connect one oil pipe to the inner surface of the upper part of the carburetor and the other oil pipe to the inside of the upper part of the carburetor. In a heating device equipped with a burner that faces the inner surface of the lower part near the open lower end of the vaporizing cylinder through a solenoid valve and has an ignition plug facing the above-mentioned ejection gap, a control unit that controls combustion at a set temperature is provided. A heating device characterized in that the solenoid valve is opened for a set time during reburning after combustion has stopped.