JPS6191412A - Evaporating device - Google Patents

Abstract

PURPOSE:To prevent the dropping of recondensed evaporating gas on the evaporating unit of a wicking body and permit the stable supply of the evaporating gas by a method wherein a premixing pipe is communicated with one side direction of the evaporating unit of the wicking body. CONSTITUTION:Liquid sucked by an absorbing body 14 is evaporated at the evaporating unit 16 by the heat of a heating body 15, the evaporating gas thereof is transported and mixed by air entered into an evaporating case 18, then, it is supplied to a burner 23 through the premixing pipe 24. As the pipe 24 is communicated with one side direction of the evaporating unit 16 of the absorbing body 14, the recondensed evaporating gas returns to a constant liquid level tank 13 along inner wall surface of the case 18. Accordingly, the constant amount of the liquid only is supplied to the evaporating unit 16 at the upper portion of the absorbing body 14 due to capillary action of the absorbing body 14, therefore, the amount of the evaporation at the evaporating unit 16 of the absorbing body 14 becomes constant. Accordingly, as the amount of evaporating gas burning at the burner 23 becomes constant, the combustion may be stabilized.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is used to vaporize liquid fuel in combustion equipment such as space heating, hot water supply, and drying equipment, and to vaporize liquid in humidifiers and steam generators. The present invention relates to a vaporization device.

1. Structure of a conventional example and its problems A conventional vaporizer will be explained with reference to FIG. FIG. 1 shows an apparatus for vaporizing and burning liquid fuel, in which an oil tank 1 is communicated with an oil level 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 5. Below the suction body 6 is a constant oil level device 3
The oil is submerged below the liquid level determined by , and the oil is sucked up to the heating element 6 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 is conveyed to the burner 9 via a premixing pipe 8 provided above the vaporization section of the suction body 6, where it is combusted.

However, in such a vaporizer, the vaporized gas re-condenses on the wall surface of the premixing pipe 8 during ignition and combustion, and the condensed liquid falls into the vaporization section of the wicking body 6. For this reason, there was a problem in that the amount of vaporization in the vaporization section of the suction body 6 pulsated, and combustion in the burner 9 became unstable.

Purpose of the Invention The present invention provides a vaporizer consisting of a wicking body and a heating element, which prevents recondensed vaporized gas from traveling along the wall of the vaporization path and falling into the vaporizing section of the wicking body, and vaporizes the gas without pulsation. A vaporizer for supplying gas is provided.

Structure of the Invention The present invention comprises 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 suction body that communicates with a blower to maintain the constant liquid level. An airtight structure consisting of an air chamber located above the tank and a frame housing a suction body with a liquid supply section at the bottom communicating with the air chamber, and communicating with the air chamber and the lower end communicating with the liquid. The vaporizer is constructed by inserting a frame into the frame and communicating a premixing pipe in the lateral direction of the vaporizing section of the wick.

DESCRIPTION OF EMBODIMENTS Hereinafter, a liquid fuel combustion apparatus as an actual example of the present invention will be described.
This will be explained using figures. In the second step, the airtight tank 11 and the cap 12 are inserted into the concave portion 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 wicking body 14 sucks up liquid upward by capillary action. The sucked up liquid is vaporized by the heat of the heating element 15 made of a coiled resistance source.

The vaporizing section 16 at the upper part 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 thickness of the lower part of the suction body 14 is made so as to sufficiently suck up the liquid to the vaporizing section 16. It is large.

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. In addition, the heating element 16 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 20 of this 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, the connection part of the premixed gas hole 2o, and the vaporization case 18
is provided in an air chamber 26 that communicates with the blower 25. Further, the vaporization case 18, which has a heating element 15° and a suction body 14 inside, can be easily pulled upward by removing the screw 27, and when inserted, the spring 28 always urges it to come into close contact with the premixing pipe 24. There is. Further, 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.

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 15. This vaporized gas enters the air chamber 26 through the blower 25 through the air hole 21a.

The air that has reached the vaporization section 16 via 21b, 2IC, 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 during 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 the 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 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 6, or change the operation time of solenoid 3o.
The damper 31 may be opened with a delay. That is, the premixed gas that has become sufficiently solid in the vaporization case 18 without any 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 liquid temperature or the re-ignition operation within a short time after extinguishing the fire. In this example, the circuit starts blowing air 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 de-energized. 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 heating element 15 is turned off. If the damper 31 is not closed, the premixture sent to the burner 23 will gradually become diluted, and the flame will eventually be extinguished, producing a strong odor of unburned gas.

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

In the vaporizer of this example described above, the wicking body 1
4, the liquid sucked up is vaporized in the vaporization part 16 by the heat of the heating element 15, and the air entering the vaporization case 18 transports this vaporized gas, and the mixture mixed with the vaporized gas is passed through the premixing pipe 24. It is supplied to the burner 23. Therefore, the vaporized gas may recondense on the wall surface of the premixing pipe 24 during ignition and combustion. Especially when igniting, the premix pipe 24
Also, since the burner 23 is cold, vaporized gas often recondenses on its wall surface. However, in this example, since the premixing pipe 24 is communicated with the lateral direction of the vaporizing section 16 of the suction body 14, the recondensed vaporized gas does not fall into the vaporizing section 16, but instead falls on the inner wall surface of the vaporizing case 18. It is transmitted and returns to the constant liquid level tank 13. Therefore, since only the amount of liquid determined by the capillary action of the wicking body 14 is supplied to the vaporizing section 16 above the wicking body 14, the vaporizing section 16 of the wicking body 14
The amount of vaporization at 6 becomes constant. Therefore, since the amount of vaporized gas combusted in the burner 23 is constant, combustion is very stable.

Furthermore, if an upwardly sloped pipe is used for the premixing pipe 24 that communicates the burners 2 and 3 with the vaporizing section 16 of the suction body 14, the vaporized gas recondensed on the wall surface of the premixing pipe 24 will be It returns to the constant liquid level tank 13 without getting stuck in the pipe 24. For this reason, even if the temperature on the wall surface of the premixing pipe 24 increases due to heat conduction from the burner 23 during combustion, the vaporized gas remains in the premixing pipe 24 because it recondenses in the premixing pipe 24. The phenomenon of vaporization again due to a rise in wall temperature does not occur. Therefore, since the amount of vaporized gas supplied to the burner 23 during combustion is constant, combustion is very stable.

Effects of the Invention As is clear from the above description, according to the present invention, the amount of vaporization in the vaporization section of the wick is constant, and vaporized gas can be supplied without pulsation. Therefore, when the vaporizer of the present invention is used in a liquid fuel combustion device, stable combustion can be achieved both at the time of ignition and at the time of combustion.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional liquid fuel combustion device, and FIG. 2 is a sectional view of a liquid fuel combustion device showing an example of the present invention. 14...Suction body, 15...Heating element, 1
8... Vaporization case, 24... Premixing pipe, 26... Air chamber. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

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. an airtight frame comprising an air chamber located above and a frame housing the suction body communicating with the air chamber and having a liquid supply section at the bottom, communicating with the air chamber and having a lower end communicating with the liquid; A vaporizing device in which the frame body is inserted into the wick, and the frame body and the premixing pipe are communicated with each other by being located in a lateral direction of the vaporizing section of the absorbent body. (2) The vaporizer according to claim 1, wherein the premixing pipe is an upwardly sloped pipe.