JPS6319743Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a suction vaporization type liquid fuel combustion device, which significantly reduces odor when extinguishing a fire, and generates almost no odor throughout the entire process from ignition to extinguishment. The purpose is to provide the following.

Liquid fuel combustion devices that use the capillary of the suction body to suck up liquid fuel from a fuel tank, vaporize it from the tip, and burn it have been widely known in the past as kerosene stoves, but most of them are portable types and mainly have indoor exhaust. However, since these are designed mainly for steady combustion, they release a terrible odor into the room when igniting or extinguishing the fire, making the user feel uncomfortable. In particular, when extinguishing the fire, the temperature of the vaporizer does not drop sufficiently after the fire is extinguished, so the delayed vaporized fuel comes into contact with the still hot combustion chamber walls, etc., and becomes partially oxidized aldehydes and other odorous substances that are released into the room, causing a major problem.

In addition, conventionally, as a safety device for oil-burning appliances,
There are some types that forcefully suck the air around the combustion part at the same time as they lower the combustion wick rapidly during vibrations or falls, but in both cases, the suction means are disparate and the operating mechanism is complicated. , requires large space. In addition, it only operates during emergency fire extinguishing, and does not perform suction operation during normal fire extinguishing, so it has no deodorizing effect at all.

The present invention solves the above-mentioned conventional drawbacks, and one embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, numeral 1 is a wick used as an example of a wick, the upper end of which is a vaporizing part 1'.
2 is a core holder, 3 is a rotating shaft for moving the core up and down, 4
5 is a guide tube that guides the outside of the core 1, 5 is a ventilation tube that guides the inside of the core 1, 6 is a heat shield plate, 7 is an outer flame tube with a hole 7', and 8 is an inner tube with a hole 8'. Flame cylinder, 9
is the primary combustion chamber, 9' is the lower space of the primary combustion chamber 9,
10 is an outer cylinder, 11 is a red-hot coil, 12 is a red-hot net, 13 is a secondary combustion chamber, and 14 and 15 are air supply paths to the secondary combustion chamber 13. 16 is a fuel tank,
17 is a suction tube, which communicates with the suction device 19 shown in FIG. Next, the operation will be described. The process from ignition to steady state is the same as the conventional one, but when extinguishing a fire, the suction device 19 connected to the suction pipe 17 is started to operate at the same time as extinguishing the fire, and the air-fuel mixture in the primary combustion chamber 9 is sucked. . That is, in FIG. 1, the suction pipe 17 connects to the space 1 of the fuel tank 16.
6', and at the same time as the suction starts, the mixture passes from the primary combustion chamber 9 through the small gap between the wick guide tubes 4 and 5 and the wick 1, and enters the space 16' of the fuel tank 16.
It is guided by. In addition, 18 in FIG. 2 is a suction box, and 18' is a space of the suction box 18. Further, the suction device 19 is operated by an electric motor such as a fan or a pump at the same time as the extinguishing operation, and the air-fuel mixture is sucked into the suction box 18. (In the space 18' of the suction box 18, a board, a net, etc. may be installed so that the air-fuel mixture collides and is liquefied. Also, in the space 18' of the suction box 18, an adsorbent, a catalyst, etc. (It is also possible to install a substance that has the function of treating vaporized fuel.) Then, the suction is connected to the fuel tank 16 from the outlet of the suction device 19 so that the re-liquefied fuel returns to the tank 16 after the suction is stopped. The communication port with the pipe 17 is located at the lower side. Further, the passage wall between the outlet of the suction device 19 and the communication port is continuous with the communication port facing downward, so that the liquefied fuel can easily return to the fuel tank 16.

Next, the effects of the embodiment of the present invention will be described.

The present inventors conducted tests on the example product shown in FIG. 1, and conducted detailed studies on its effects.
That is, the exhaust gas was compared when the suction device 19 was activated and when it was not activated immediately above the red-hot net 12. According to this, when the amount of suction in the suction device is set to the amount that is sucked in at a flow rate of 2/min for about 30 seconds immediately after extinguishing the fire, there is virtually no odor directly above the suction device, and substances such as aldehydes are also removed from the suction device 19. It was reduced to about 1/10 or less compared to when it was not activated. Of course, no odor was observed even after the suction was stopped. The amount of combustion at this time is approximately
It was 2100Kca/hour, and the fire was extinguished by instantly lowering the wick. Of course, the above effect is sufficient when the suction amount is above the above, but even with half the suction amount, the odor, aldehydes, etc. are reduced to less than half compared to when the suction device 19 is not operated. do. In the embodiment shown in FIG. 1, in order to suck the air-fuel mixture in the lower space 9' of the primary combustion chamber 9, the fuel tank is It is configured to suck air from the space 16'. However, the lower space 9' of the primary combustion chamber 9 or the core guide tubes 4, 5
A sufficient effect can also be obtained by opening the end of the suction tube 17 into the space formed between the two.

In addition, as shown in Fig. 2, since a suction box 18 is provided in the middle of the suction pipe communicating with the space of the fuel tank, the sucked air-fuel mixture is cooled in the fuel tank 16 with a large heat capacity, and the fuel gas is removed. The dew condenses, moves further in the direction of arrow 20 and is temporarily accumulated above it in the suction box, and is further removed.
The odor is then released into the room, eliminating the odor.

In addition, even if the suction box 18 and suction device 19 are only in space, they will naturally cool down after a while after suction, and the fuel will be re-liquefied mainly on the wall and will pass through the suction pipe 17 into the fuel tank 16. will return to. In order to achieve rapid cooling at this time, it is preferable to use a structure in which the drawn air-fuel mixture collides with a net, paper, metal plate, etc. so that heat is easily removed. Moreover, if a filter, adsorbent, catalyst, etc. are installed to further actively process the air-fuel mixture, the effect will be further increased.

Furthermore, in the present invention, an electric fan,
Because it uses a pump, etc., it can be constructed easily, takes up less space, and is cheaper than a mechanical type that uses springs, bellows, etc., and also requires no preparation before operating it (storing energy in the spring). ) and is easy to use. The suction amount and suction pressure can also be easily and freely selected according to other specifications. In addition, in this example, the vaporized fuel components in the intake air are liquefied in the tank and exhaust route, and the gas finally discharged from the fan to the outside is mostly air, with only a small amount of fuel oil itself. Although there was an odor, it was negligible compared to when extinguishing a fire in the conventional example.

As described above, according to the present invention, it is possible to provide a comfortable liquid fuel combustion device that greatly reduces odor during all fire extinguishing operations including emergency extinguishing operations. In particular, in this invention, the gas suction device is driven by an electric motor, so
The suction operation can be performed while delayed vaporization from the wick occurs, that is, for a long time, and odor can be reliably prevented. Further, the gas suction device is provided above the fuel tank, and the communication port between the gas suction device and the fuel tank is located lower than the outlet of the gas suction device, and the liquefied fuel inside the gas suction device is The gas is designed to return to the fuel tank without accumulating in the gas suction device. Therefore, the function of the gas suction device will not be impaired due to accumulation of liquefied fuel in the gas suction device during long-term use, and a good odor absorption effect can be obtained over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a liquid fuel combustion device according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part of the same device. 1... Core (suction body), 9... Primary combustion chamber, 1
3... Secondary combustion chamber, 17... Suction pipe, 19, 21
...Suction device (suction device).

Claims (1)

[Scope of utility model registration request] a fuel tank having a vent tube and a guide tube; a core having one end located within the tank and a vaporizing portion at the other end movable up and down between the vent tube and the guide tube; A combustion chamber disposed on the guide cylinder, an inner/outer flame cylinder that burns vaporized fuel vaporized from the vaporization part of the wick raised so as to face the combustion chamber, and a space above the fuel in the fuel tank, which communicates with the upper space of the fuel in the fuel tank. The gas suction device is provided with a gas suction device communicated with the combustion chamber through the space above the fuel and between the vent pipe and the guide tube, and an electric motor that puts the gas suction device into an operating state when extinguishing the wick drop. The gas suction device is provided above the fuel tank, and the outlet portion of the gas suction device and the communication port portion to the fuel tank are configured such that the communication port portion is located below to prevent liquid fuel from accumulating within the gas suction device. Further, the liquid fuel combustion device is configured such that one end of the gas suction device communicates with the combustion chamber, and the other end is open to a region other than the combustion chamber.