JPH052883B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vaporizer for vaporizing liquid fuel in combustion devices such as space heating, hot water supply, and drying devices, and for vaporizing liquid in humidifiers and steam generators. It is something.

Configuration of a conventional example and its problems A conventional liquid fuel combustion apparatus equipped with a vaporizer will be described with reference to FIG. The oil tank 1 communicates with an oil level device 3 and an oil tank 4 via an oil feed pipe 2. A heating element 5 that generates heat when energized is provided above the oil surface of the oil tank 1, and a suction element 6 is attached to cover the entire circumference of the heating element 5. The lower part of the suction body 6 is submerged below the liquid level determined by the oil regulating device 3, and the oil is sucked up to the heating element 5 by capillary action.

At this time, if the heating element 5 is energized, vaporized gas is generated from the suction body 6 in accordance with the amount of energization. The vaporized gas is mixed with air from the blower 7 and conveyed to the burner 8 where it is combusted.

However, if you use this type of vaporizer for many years,
Tar adheres to the wicking body 6, reducing its ability to suck up oil due to capillary action. For this reason, the suction body 6 must be replaced, but in the conventional configuration described above, there is a problem in that replacing the suction body 6 is extremely troublesome.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a vaporizer in which a suction body is replaceable and vaporized gas is supplied to a premixing pipe without leaking.

Composition of the Invention The vaporization device of the present invention includes a constant liquid level tank in which an airtight tank is removably mounted, a suction body that sucks up the liquid in the constant liquid level tank to an upper heating element by capillary action, and a blower. It is composed of an air chamber located above a constant liquid level tank that communicates with the air chamber, and a frame housing a suction body that communicates with the air chamber and has a liquid supply section at the bottom.
The frame is inserted into an airtight frame that communicates with the air chamber and its lower end communicates with the liquid, and the premixing pipe and frame are connected within the air chamber.

DESCRIPTION OF EMBODIMENTS A liquid fuel combustion apparatus as an embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

The cap 12 of the airtight tank 11 is inserted into the recess of the constant liquid level tank 13, so that the liquid level in the constant liquid level tank 13 remains approximately constant. On the other hand, a suction body 14 made of a heat-resistant material is inserted into this liquid. The wicking body 14 sucks up liquid upward by capillary action. The sucked up liquid is vaporized by the heat of a heating element 15 made of a coiled resistance wire. The upper vaporizing section 16 of the suction body 14 is provided so as to completely enclose the heating element 15 in order to improve the vaporization efficiency, and the lower suction body 14 is provided so as to completely enclose the heating element 15.
The thickness is large enough to absorb liquid.

Both ends of the heating element 15 are held by support wires 17, which pass through an insulating section 19 of the vaporization case 18 and are connected to an external power supply path. Also,
The heating element 15 and the suction body 14 are connected to the premixed gas hole 2
0, and is housed in a vaporization case 18 having air holes 21a, 21b, 21c, and 21d and a liquid passage portion 22. Premixed gas hole 20 of this vaporization case 18
is a premixing pipe 24 with a burner 23 downstream
is connected to. Further, the connection portion between the premix pipe 24 and the premix gas hole 20 of the vaporization case 18 , and the air chamber 26 where the vaporization case 18 communicates with the blower 25
It is located inside. In addition, there is a heating element 15 inside,
The vaporization case 18 having the suction body 14 can be easily pulled upward by removing the screw 27.
In the inserted state, the spring 28 presses the vaporization case 18 into close contact with the premixing pipe 24. The lower end of the vaporization case 18 is inserted into an airtight frame 29 whose upper surface communicates with the air chamber 26 and whose lower end communicates with the liquid. Therefore, the vaporization case 18 can be attached and detached from the air chamber 26, and the suction body 14 can be replaced very easily.

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

The liquid sucked up by the suction body 14 is transferred to the heating element 15
It is vaporized in the vaporizing section 16 due to the heat of. This vaporized gas enters the air chamber 26 from the blower 25 and enters the air hole 21.
The air that has reached the vaporization section 16 via a, 21b, 21c, and 21d is transported to the premixing pipe 24 and burned in the burner 23. Although combustion is based on this principle, the following operations are required when igniting and extinguishing a fire.

First, even if electricity is applied to the heating element 15 at the time of ignition, the amount of vaporization does not immediately reach a steady state. Since the vaporization section of this embodiment has an extremely small heat capacity, it is possible to ignite within a few seconds, but the amount of vaporization is not sufficient within these few seconds. Even if a dilute premixed gas is sent to the burner 23 by air from the blower 25 within this time, complete combustion will not occur. For this purpose, heating element 1
It is necessary to shift the timing by a few seconds after turning on electricity to No. 5 and before starting air blowing. For this timing, the operating time of the blower 25 may be shifted, or the damper 31 may be opened with a delay using the solenoid 30. That is, the premixed gas, which has become sufficiently concentrated in the vaporization case 18 without wind for several seconds, is transported to the burner 23 and ignited by the ignition electrode 32 when the air blowing starts.

This timing difference of several seconds changes depending on conditions such as the liquid temperature or the re-ignition operation within a short time after extinguishing the fire. In this embodiment, the circuit starts blowing air when the temperature of the temperature detection section 33 provided at the lower end of the vaporizing section 16 rises to a predetermined temperature.

Further, when extinguishing a fire, the damper 31 is closed at the same time as the heating element 15 is de-energized. This is because the vaporization part 6 has reached the boiling point temperature of the liquid, and the heating element 1
This is because vaporization does not stop immediately even if the electricity supply to No. 5 is stopped. If the damper 31 is not closed, the premixture sent to the burner 23 will gradually become diluted.
Eventually, the flame will blow out, producing a strong odor of unburned gas. For this reason, in this embodiment, a damper 31 is provided in order to stop the flow of all paths when extinguishing a fire.

Furthermore, since the premixing pipe 24 and the burner 23 are cold at the time of ignition, the vaporized gas re-condenses on their walls, and even when extinguishing, the flow is blocked by the damper 31 as described above, so the premixing pipe 24,
The vaporized gas remaining on the wall surface of the burner 23 is also recondensed. In order to cause these condensed liquids to flow back to the constant oil level tank 3, the premixing pipe 24 is sloped in this embodiment.

The flow of air and vaporized gas in this embodiment described above will be explained in detail using FIG. 3.
Now, the pressure in the air chamber 26 becomes P ₁ due to the air 41 sent from the blower 25, and the air 42 entering the vaporization case 18 from the air holes 21a, 21b, 21c, and 21d of the vaporization case 18 causes the vaporization case 18 to rise.
Suppose that the pressure becomes P ₂ . When air enters the vaporization case 18 from the air chamber 26, the vaporization case 18
Because of the pressure loss at the air holes 21a, 21b, 21c, and 21d, the relationship _P1 > _P2 is established between _P1 and _P2 . On the other hand, the liquid sucked up from the suction body 14 is vaporized in the vaporization section 16 by the heat of the heating element 15. This vaporized gas 43 is conveyed by the air 42 that has entered the vaporization case 18, and the mixture 44 mixed with the vaporized gas 43 is passed through the premix pipe 24 to the burner 2.
Supply to 3. Therefore, even if the vaporized gas 43 tries to leak into the air chamber 26 from the connection between the premixed gas hole 20 of the vaporization case 18 and the premixed pipe 24, the pressure in the air chamber 26 will always be higher than the pressure in the air chamber 26 to prevent vaporization. Since the pressure is higher than that of the case 18, the vaporized gas 43
Leaking into the air chamber 18 is unlikely to occur. Therefore, even if the vaporization case 18 that houses the heating element 15 and the suction body 14 has a structure that can be easily pulled upward by removing the screw 27, the premix gas hole 20 of the vaporization case 18 and the premix gas hole 20 The vaporized gas 43 will not leak from the connection part of the pipe 24.

Further, one end of the premixing pipe 24 is made into a flange structure, and a packing 45 is provided between the vaporization case 18 and the flange, so that the premixing pipe 24 and the vaporization case 18 are connected to each other.
If they are brought into close contact with each other, the airtightness at the connection part can be increased.

Furthermore, a spring 28 is provided in the air chamber 26,
By urging the spring 28 so that the premixing pipe 24 and the vaporization case 18 are always in close contact with each other,
The airtightness at the connection portion can be further increased.

Effects of the Invention As is clear from the above explanation, according to the present invention, the vaporized gas generated in the vaporization part of the wicking body can be supplied to the premixing pipe without leaking to others, and the wicking body can be easily replaced. It is possible to do so.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional liquid fuel combustion device, FIG. 2 is a sectional view of a liquid fuel combustion device equipped with a vaporization device showing an embodiment of the present invention, and FIG. 3 is a sectional view of the same essential parts. be. 14... Suction body, 15... Heating element, 18... Vaporization case, 24... Premixing pipe, 26... Air chamber.

Claims (1)

[Scope of Claims] 1. A constant liquid level tank in which an airtight tank is removably placed, a suction body that sucks up the liquid in the constant liquid level tank to an upper heating element by capillary action, and communication with a blower. an air chamber located above the constant liquid level tank;
a frame housing the suction body that communicates with the air chamber and has a liquid supply section at the bottom thereof, and inserts the frame into an airtight frame that communicates with the air chamber and whose lower end communicates with the liquid; , a vaporizer in which a premixing pipe and the frame are connected in the air chamber; 2. The vaporizer according to claim 1, wherein one end of the premixing pipe has a flange structure and is connected to the frame via packing. 3. The vaporizer according to claim 1 or 2, wherein the frame body is biased and pressed against the premixing pipe by a spring provided in the air chamber.