JPS6191411A - Evaporating device - Google Patents

Abstract

PURPOSE:To permit uniformity of mixing of evaporating gas and air by a method wherein an evaporating device is constituted of an air chamber positioning on the upper surface of a tank, having constant liquid level and a frame body accommodated an upper body, having supplying unit of liquid at a lower portion. CONSTITUTION:Air for transportation, ejected from a plurality of air holes 21a-21d drilled on the wall surface of an evaporating case 18 is used for the transportation of the evaporating gas due to contact uniformly to the surface of an absorbing body 14. The air for transportation is sent to the evaporating case 18 in order to promote the mixing of the evaporating gas and the air. For this purpose, the mixing gas supplying to a premixing pipe 24 becomes uniform condition without partial light and shade, further, the air holes at the wall surface of the case 18 is drilled at the position which is higher than the surface and lower than the heating body 15, accordingly, the air ejected from the air holes contacts to the surface of the absorbing body 14. In addition, as the air does not contact directly to the evaporating portion 16 of the absorb ing body 14, the stable evaporation may be effected in the device.

Description

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

The structure of the conventional example and its problems First, regarding the liquid fuel combustion device equipped with the conventional vaporizer.
This will be explained using figures. The oil tank 1 communicates with an oil level constant device 3 and an oil tank 4 through 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 6. The lower part of the suction body 6 is submerged below the liquid level determined by the constant oil level device 3, and the oil is sucked up to the heating element 6 by capillary action.

At this time, if the heating element 6 is energized, vaporized gas is generated from the absorbent 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, in such a vaporizer, it is difficult to uniformly apply the conveying air sent from the blower 7 to the suction body 6, and the conveying air is not effectively utilized. In addition, since the amount of vaporized gas generated in the vaporizing section of the suction body 6 becomes uneven depending on the position of the vaporizing section, there is a problem that the vaporized gas and air are mixed unevenly and supplied to the burner 8. there were.

OBJECTS OF THE INVENTION The object of the present invention is to make effective use of the conveying air by uniformly applying the conveying air to the absorbent body, and to uniformly mix the vaporized gas and the conveying air.

Composition of the Invention The vaporizer of the present invention has 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 a blower that communicates with each other. An airtight frame consisting of an air chamber located 1d above the top surface of the constant liquid level tank and a frame housing a suction body having a liquid supply section at the bottom, communicating with the air chamber and having a lower end communicating with the liquid. A frame body is inserted into the frame body, several small holes are made in the wall surface of the frame body, and the air chamber and the frame body are communicated with each other.

DESCRIPTION OF ACTUAL EXAMPLES Hereinafter, a liquid fuel combustion apparatus as an embodiment of the present invention will be described as a second example.
This will be explained using figures.

The cap 12 of the airtight tank 11 is inserted into the recess of the constant liquid level tank 13, and the liquid level in the constant liquid level tank 13 is kept approximately constant. On the other hand, a suction body 14 made of a heat-resistant material is inserted into this liquid. The suction body 14 sucks up liquid upward by capillary action. The sucked up liquid is heated to a heating element 1 made by coiling resistance wire.
It is vaporized by the heat of 5. Vaporizing section 1 on the upper part of the wicking body 14
6 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 made thick so as to sufficiently suck up the liquid to the vaporization section 16.

Both ends of the heating element 16 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. In addition, the heating element 15 and the suction body 14 include a premixed gas hole 20, air holes 21a, 21b,
Vaporization case 1 having 21C, 21d and liquid passage part 22
It is stored in 8. The premix gas hole 2° of the vaporization case 18 is connected to a premix pipe 24 having a burner 23 downstream.
is connected to. In addition, the premixing pipe 24 and the vaporization case 1
8 premixed gas holes 20 and the vaporization case 18
is provided in an air chamber 26 that communicates with the blower 25. Furthermore, the vaporization case 18, which has a heating element 16° and a suction body 14 inside, can be easily pulled upward by removing the screw 27, and in the inserted state, the spring 2 brings the vaporization case 18 into close contact with the premixing pipe 24. It is pressed and biased to do so. 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 vaporized in the vaporization section 16 by the heat of the heating element 16. This vaporized gas is blown into the air chamber 26 from the charcoal 26 through the air hole 21a.

The air that has reached the vaporization section 16 via 21b and 21C221d is fed 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, at the time of ignition, even if the heating element 16 is energized, the amount of vaporization does not immediately reach a steady state. The vaporization part of the false case has extremely low heat capacity, so it is possible to ignite within a few seconds, but the amount of vaporization is not sufficient within these few seconds. Even if the dilute premixed gas is sent to the burner 23 by air from the blower 26 within this time, complete combustion will not occur. For this reason, it is necessary to shift the timing by several seconds after energizing the heating element 16 and before starting air blowing. This timing is for blower 2
You can shift the operation time of solenoid 5, or change the operation time of solenoid 30.
The damper 31 may be opened with a delay. That is, the premixed gas that has become sufficiently concentrated in the vaporization case 18 without wind for several seconds is conveyed to the burner 23 when the air blowing starts, and is ignited by the ignition electrode 32.

This timing difference of several seconds changes depending on conditions such as the presence of liquid or the re-ignition operation within a short time after extinguishing the fire. In a false case, the air blowing is started by a circuit that starts air blowing when the temperature of the temperature detecting 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 stopped from flowing. This is because the temperature in the vaporizing section 6 has reached the boiling point of the liquid, and vaporization does not stop immediately even if the 150 heating elements are stopped. If damper 31
If it is not closed, the premixture sent to the nozzle 23 will gradually become diluted, and eventually the flame will be extinguished, producing a strong odor of unburned gas.

For this reason, in this embodiment, a damper 31 is provided to stop the flow n of all paths when extinguishing the fire.

In addition, when the eyebrows are on fire, premix, Kuib 24 and) Kusu 23
Since it is cold, the vaporized gas recondenses on the wall surface of the premixed/< Eve 24° burner 23, and even when extinguishing the fire, the light is blocked by the damper 31 as mentioned above, so the premixed gas remains on the wall surface of the burner 23. The vaporized gas caused another suspicion. In order to cause these reduced liquids to flow down to the original constant oil level tank 3, the premixing pipe 24 is inclined in the unfavorable case.

In the vaporizer of this actual case described above, the blower 2
The conveying air sent from 5 once enters the air chamber 26. The conveyance air that has entered the air chamber 26 is passed through air holes 21a and 21b bored in the vaporization case 18.

It enters the vaporization case 18 from 21c and 21d. At this time,
Air holes 21a and 21b formed on the wall of the vaporization case 18
, 2IC, and 21d are composed of a plurality of small holes, the conveying air ejected from these small holes flows into the suction body 1.
Since it uniformly contacts the surface of 4, it is effectively used for transporting vaporized gas.

Further, since the conveying air is ejected from the plurality of small holes and sent into the vaporization case 18, mixing of the vaporized gas and the conveying air is greatly promoted. For this reason, the air-fuel mixture supplied to the premixing pipe 24 has no local concentrations and is extremely uniform.

Further, an air hole 21a is provided in the vaporization case 18.

21b, 2IC, and 21d on the wall of the vaporization case 18,
The air holes 21a are formed by drilling them at a position higher than the liquid level and lower than the heating element 16.

The conveying air ejected from 21b, 21c, and 21d contacts the surface of the suction body 14 without waste. In addition, air hole 21
Since the conveying air ejected from a, 21b, 22c, and 22d does not directly reach the vaporization section 16 of the suction body 14, the vaporization in the vaporization section 16 of the suction body 14 is stably performed.

Therefore, the air-fuel mixture supplied to the premixing nozzle 24 becomes uniform and stable.

Effects of the Invention As is clear from the above description, according to the present invention, the conveying air uniformly contacts the suction body, promoting the mixing of the vaporized gas and the conveying air, and creating a uniformly mixed air-fuel mixture. can be supplied.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conventional liquid fuel combustion device, and FIG. 2 is a cross-sectional view of a liquid fuel combustion device equipped with a vaporizer according to an embodiment of the present invention. 14...Suction body, 16...Heating element, 1
8... Vaporization case, 21 a, 21 b
, 2I C, 21d--Air hole, 24...
Premix pipe, 26... air chamber.

Claims (2)

[Claims] (1) 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 the heating element above by capillary action, and the constant liquid level tank that communicates with a blower. It is composed of an air chamber located on the upper surface, and a frame body having a liquid supply section at the lower part and housing the suction body, and the frame body communicates with the air chamber and has a lower end connected to the liquid inside the airtight frame. is inserted into the frame, a plurality of small holes are bored in the wall of the frame, and the air chamber and the frame are communicated with each other. (2) The vaporizer according to claim 1, wherein the small hole is formed at a position higher than the liquid level in which the frame is immersed and lower than the heating element.