JPS6189408A - Evaporator - Google Patents

Abstract

PURPOSE:To prevent the air for conveying evaporation gas from leaking, by opening the passage from a fan to the surface of a constant-level tank, by providing a frame body housing a liquid supply part in the lower part of a tank, and by inserting a suction body into the frame body. CONSTITUTION:The cap 12 of an airtight tank 11 is inserted into the recess part of a constant-level tank 13, and a suction body 14 is inserted into the constant-level tank 13. An air chamber 26 is pressurized by a fan 25, and the total quantity of air is to be fed to burner 23. Combustion air may leak to the open air from the neighborhood of the cap 12 of an airtight tank 11 passing through the oil surface, if a frame body 29 is not provided in the tank 13. A damper 31 is closed at the time of ignition and extinction, and this time an evaporation case 18 and the air chamber 26 are filled with evaporation gas, but the frame body 29 prevents the gas from leaking to the outside through the cap 12. With such an arrangement, the air from the fan can effectively convey evaporation gas to a burner.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vaporizer that is applied to combustion devices, humidifiers that vaporize water, and other devices that vaporize liquids.

Structure of a conventional example and its problems A conventional example of the present invention will be explained with reference to FIG. FIG. 1 shows an apparatus for vaporizing and combusting liquid fuel, and an oil tank 1 is connected to a constant oil level device 3 and an oil tank 4 through an oil feed pipe 2. A heating element 6 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 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 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.

In the configuration of the conventional example described above, the constant liquid level device 3 is required. Although the vaporizing section of the present invention has an extremely simple structure, it can be made even simpler if such a constant liquid level device 3 does not have to be used. For this purpose, a constant liquid level tank with an airtight tank structure is generally used, but when the area around the suction body 6 is pressurized by the blower 7 as in the present invention, an airtight tank is used as described above. Even when used, the airtight tank and constant liquid level tank can be attached and removed.
This has the problem of air leakage, which reduces the amount of air available for transporting the vaporized gas.

In addition, not only the conveying air but also vaporized gas may leak from the attachment/detachment portion, causing safety problems. Another problem is that when liquid fuel is used to vaporize, the air blowing is stopped when igniting or extinguishing the fuel, but at this time, vaporized gas due to the residual heat of the suction body 6 fills the vicinity of the vaporization part and fills the surrounding gap. Another problem is that it leaks into the outside air and causes odor.

Purpose of the Invention The present invention provides a simple configuration in which an airtight tank is used as a constant liquid level tank of a vaporizer consisting of an wicking body and a heating element, in which air for conveying vaporized gas is transferred between the airtight tank and the constant liquid level tank. The purpose of this is to prevent the air from leaking from the attachment/detachment part of the air blower, and to allow the air from the blower to effectively transport vaporized gas. At the same time, the aim is to reduce power consumption and odor when used to vaporize liquid fuel.

Structure of the Invention The present invention provides 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 vaporization method of the suction body. A frame body is provided on the upper surface of the constant liquid level tank that communicates with the blower and has a liquid supply section at the bottom, and the frame body has a blower that communicates with the It is a vaporization device into which the body is inserted.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 2 and 3. 2 and 3 show an example in which the present invention is applied to a liquid fuel combustion device, and FIG. 3 is a side sectional view.

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 absorbent body 14 made of a heat-resistant material is inserted into this liquid. The suction body 14 sucks up the liquid upward by capillary action, and the liquid is vaporized by the heat of the heating element 15 made of a coiled resistance wire. The vaporizing section 16 above the suction body 14 is provided to completely enclose the heating element 16 in order to improve the vaporization efficiency, and the suction body 14 below is provided so as to sufficiently suck up the liquid to the vaporization section 16. The thickness is set as a dog.

Both ends of the heating element 15 are held by support wires 17, and the support wires 17 are connected to an external power supply path through an insulating portion 19 of the vaporization case 18. Further, the generator 15 and the suction body 14 are housed in a vaporization case 18 having a premixed gas hole 20°, an air hole 21&~21d, and a liquid passage portion 22. The premix gas hole 20 of this vaporization case 18 is connected to a premix pipe 24 having a burner 23 downstream.

Further, the connection portion between the premix pipe 24 and the premix gas hole 2o of the vaporization case 18, and the vaporization case 18 are provided in an air chamber 26 that communicates with the blower 25.

There is also a heating element 15 inside. Vaporization case 1 with wicking body 14
8 can be easily pulled upward by removing the screw 27, and when inserted, a spring 28 always urges the premixing pipe 24 to come into close contact with the premixing pipe 24. The lower end of the vaporization case is inserted into a frame 29 whose upper surface communicates with the air chamber 26 and whose lower end communicates with the liquid.

The principles of vaporization and combustion in such a configuration of the present invention will be explained below. 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 and air holes 21a to 21d.
The air that has reached the vaporization section 16 through the
4 and burned in a burner 23. Although combustion is based on this principle, the following operations are required when igniting and extinguishing a fire.

At the time of ignition, the heating element 15 is energized and the amount of vaporization does not reach a steady state immediately. Since the vaporization section of the present invention 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 26 within this time, it will not be completely burned out. For this purpose, the heating element 15
After turning on the power, it is necessary to shift the timing by several seconds before starting air blowing. This timing may be determined by shifting the operating time of the blower 25, or by opening the damper 31 by a solenoid 30 shown in FIG. That is,
The premixed gas, which has become sufficiently concentrated in the vaporization cane 8 without wind for several seconds, is conveyed to the burner 23 by the start of air blowing and is ignited by the ignition electrode 32.

This timing difference of several seconds changes depending on the liquid temperature or the re-ignition operation within a short time after extinguishing the fire. In the present invention, 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.

In addition, when extinguishing a fire, the damper 31 is closed at the same time as the heating element 15 is de-energized. This will stop the flow of all routes when the fire is extinguished. If this were the case, the vaporizing section 16 would reach the boiling point temperature of the liquid, and vaporization would not stop immediately even if the electricity to the heating element was turned off. If the damper 31 is not closed, the premixture sent to the burner 23 will gradually become diluted, and eventually the flame will blow out, producing a strong odor of unburned gas.

In addition, in the combustion device of the present invention, when igniting, the premixing pipe 24
Since the burner 23 is cold, the vaporized gas re-condenses on the wall surface of the burner 23, and even when the fire is extinguished, the flow is blocked by the damper 31 as described above, so the premixing pipe 24. The vaporized gas accumulated on the wall surface of the burner 23 is also recondensed.

In order to allow these condensed liquids to flow back to the constant oil level tank 13, the premix pipe 24 has an inclination.

The operation of the frame body 29 of the present invention described above will be explained in detail below. The air chamber 26 is pressurized by the blower 25. All of this air must be sent to the burner 23, but if the frame 29 is not present, the combustion air may pass over the oil surface and leak into the outside air from near the cap 12 of the airtight tank 11.

Also, when igniting or extinguishing the fire, the damper 31 is closed, and at this time the vaporization case 18 and the air chamber 26 are filled with vaporized gas, but the frame 29 prevents this gas from leaking into the outside air through the cap 12. There is. Moreover, the gas accumulated in the air chamber 26 is rapidly cooled and condensed by the heat conduction of the frame 29 whose lower part is immersed in low-temperature oil, making it difficult to leak through the gap above the air chamber 26.

Also, during combustion, this frame 29 has the function of transmitting combustion heat (radiation, heat transfer) upward to the oil surface. By recovering this combustion heat, the temperature of the oil sucked up by the wicking element 14 increases, and the heating element 1
5. It is possible to save power consumption. Also, a part of the heat of the heating element 15 is transmitted downward by the absorbent body 14, but the frame body 29 keeps the lower part of the absorbent body 14 warm, so that such heat loss is minimized. If the frame body 29 were not present, this heat would spread throughout the constant liquid level tank 13 and would be dissipated.

Experiments have shown that adding a frame can save about 6% of power consumption.

The lower end of the suction body 14 is located above the lower end of the frame body 29. This is a configuration in which when the liquid level of the constant liquid level tank 13 drops abnormally due to forgetting to refuel, the wicking body 14 first moves away from the liquid level and becomes dry-fired. At this time, since the air chamber 26 is not communicated with the outside air by the frame 29, the vaporized gas and the combustion air do not leak to the outside air, so it is safe. Even if this state continues, the liquid level will not drop any further, and during this time the vaporizing section 16 will reach a high temperature and can burn off deposits such as tar.

Effects of the Invention As described above, in the present invention, generation is reduced in the vaporization section. Furthermore, power consumption during steady combustion can be saved. It also improves safety against forgetting to refuel. moreover,
Safe leaning (high boiling point that reduces the vaporization ability of the wicking material

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional vaporizer, Figures 2 and 3 are
The figures are a front sectional view and a side sectional view of a vaporizer according to an embodiment of the present invention. 11... Airtight tank, 13... Constant liquid level tank, 14... Suction body, 15... Heat generating element, 26... Send! Machine, 29...frame body. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3 Jσ 222q

Claims (2)

[Claims] (1) A constant liquid level tank in which an airtight tank is removably mounted, a wicking body that sucks up the liquid in the constant liquid level tank to the heating element above by capillary action, and a vaporizing section of the wicking body of the heating element. a frame body having an air blower communicating with the constant liquid level tank, having an opening on the upper surface of the constant liquid level tank, communicating with the air blower, and opening a lower part into the liquid, and inserting the suction body into the frame body. vaporizer. (2) The vaporizer according to claim 1, wherein the lower end of the absorbent body is located above the lower end of the frame.