JPH0356853Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a catalytic combustion type kerosene fan heater, in particular, a method for preheating and heating to obtain optimum combustibility.
The present invention relates to a kerosene fan heater having a mixing means.

[Conventional technology]

Conventionally, catalytic combustion type kerosene fan heaters were
It was configured as shown in the figure. In the figure, a heat dissipation port 2 is formed at the upper part of the front surface of the housing 1, a hot air port 3 is formed at the lower part thereof, and an air intake port 4 is provided at the rear surface. A mixing section 8 having a combustion catalyst section 5, an air fan 6, and a fuel supply nozzle 7 is provided inside the housing 1, and a hot air fan 9 is provided at the bottom. Further, the combustion catalyst section 5
The outlet side of the hot air fan 9 is connected to the hot air fan 9 via a hot air passage 10, and a radiation plate 11 is provided at a position of the hot air passage 10 facing the heat radiation port 2. The surface of the plate 11 opposite to the heat radiation port 2 side faces the combustion catalyst section 5 .

In the conventional fan heater configured as described above, kerosene as fuel is supplied from the fuel supply nozzle 7 into the mixing chamber 8, mixed with combustion air taken in from the air fan 6, and mixed with the combustion catalyst during combustion. After being preheated by radiant heat from section 5,
It is supplied in a liquid state to the combustion catalyst section 5 and burned. The burnt gas heats the radiation plate 11, is sucked in by the hot air fan 9, and is discharged to the outside from the hot air port 3 through the hot air passage 10.

[Problem that the invention attempts to solve]

However, according to the above-mentioned conventional structure, since kerosene is a liquid, the radiated heat of the combustion catalyst alone is insufficient for the evaporation and vaporization of the kerosene itself. Because of this, there was a problem that the fuel could not be burned stably.
Furthermore, since the kerosene is in liquid form, the kerosene and air required for combustion cannot be mixed sufficiently, and the fuel cannot be stably combusted. As a result, there has been a problem in that it is not possible to achieve the safe combustion of fuel to render it harmless, which is particularly required for household fan heaters.

An object of the present invention is to provide a kerosene fan heater in which liquid kerosene is completely evaporated, vaporized, and mixed with combustion air, and the fuel can be completely burned and rendered harmless.

[Means for solving problems]

In order to achieve the above object, the present invention includes a fuel supply nozzle that supplies fuel, an air fan that takes in air, a combustion catalyst section that combusts the fuel mixed with the air, and a combustion catalyst section that combusts the fuel mixed with the air. In a kerosene fan heater comprising a hot air fan for discharging hot air, a preheating section made of a porous member is provided at the center of the combustion catalyst section, and the preheating section is connected to the fuel supply nozzle and the air fan upstream of the preheating section, respectively. The apparatus is constructed by connecting double piping, and providing an inversion mixing section connected to the combustion catalyst section on the downstream side of the preheating section.

[Effect]

According to the above configuration, the preheating section provided at the center of the combustion catalyst is surrounded by the combustion catalyst section, which is a heating element that continues to burn, so when liquid kerosene passes through the preheating section, Then, it receives direct heat transfer from the combustion catalyst, and is rapidly heated and evaporated. Moreover, the heat source that generates the amount of heat necessary for this evaporation is the one obtained by burning the vaporized fuel in the combustion catalyst section, and is a heat source that does not stop as long as the fuel supply continues. In addition, by inverting the flow of air and vaporized fuel in the inversion mixing section, sufficient diffusion mixing can be achieved.

〔Example〕

Hereinafter, one embodiment of the kerosene fan heater according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In this figure, the same or equivalent parts as those of the conventional example shown in FIG. 2 are denoted by the same reference numerals, and the explanation thereof will be omitted. The feature of this embodiment is that a preheating section 12 made of a porous ceramic plate is provided at the center of the combustion catalyst section 5. A double pipe 14 consisting of an air pipe 13 connected to the air fan 4 and a fuel pipe (not shown) provided with a fuel supply nozzle 7 is connected to the upstream side of the preheating section 12. Further, an inversion mixing section 15 connected to the combustion catalyst section 5 is provided on the downstream side of the preheating section 12 . The other structure is the same as the conventional example shown in FIG.

Next, the operation of this embodiment will be explained. Kerosene fuel is supplied into the air pipe 13 from the fuel supply nozzle 7.
On the other hand, air is taken in from the air intake port 4 by an air fan 6, and enters the air pipe 13 via this air fan 6. The kerosene supplied into the air pipe 13 is transported by air, enters the preheating section 12, is evaporated and vaporized, and is premixed with air. The fuel and air exiting the preheating section 12 enter an inversion mixing section 15 connected to the downstream side, where they are inverted and diffused and mixed. Here, the mixed gas of fuel and air is at the combustion start temperature of kerosene in the combustion catalyst section 5 of the next stage, which is 200%.
Heated above ℃. The mixed gas reversed in the reversal mixing section 15 enters the combustion catalyst section 5 disposed around the outer periphery of the preheating section 12 and is combusted. The burned gas heats the radiation plate 11, is sucked in by the hot air fan 9, passes through the hot air passage 10, and is discharged to the outside from the hot air port 3.

The preheating section 12 is formed of a porous ceramic plate, and includes a combustion catalyst section 5 which is a heating element.
Because it is surrounded by kerosene, it has a sufficient heat source to obtain the latent heat of vaporization of kerosene. Further, the main form of heat transfer is direct heat conduction from the combustion catalyst section 5, and radiant heat from the combustion catalyst section 5 is also received, so that sufficient heat transfer is performed. Also, the mixture of fuel and air is
Since the gases are premixed when passing through the preheating section 12 and further mixed in the reversal mixing section 15 by the reversal force of the gas, sufficient mixing can be achieved. Therefore, according to this embodiment, the liquid kerosene can be completely evaporated and vaporized, and can be completely mixed with the combustion air, so that stable combustibility can be obtained in the combustion catalyst section 5, and the combustion gas can be made harmless. can be achieved. Furthermore, since stable fuel can be continuously supplied to the combustion catalyst section 5, deterioration of the combustion catalyst section 5 itself can be suppressed and the reliability of the fan heater can be improved.

In the above-described embodiment, the preheating section 12 is formed of a porous ceramic plate, but the preheating section 12 may be formed of another heat-resistant porous member, or may be formed of a material other than a plate member. It may also be formed of a so-called honeycomb molded product.

[Effect of idea]

As described above, according to the present invention, a preheating section made of a porous plate is provided at the center of the combustion catalyst section of a kerosene fan heater, and the fuel and air are preheated and mixed before being introduced into the combustion catalyst section. The kerosene is completely evaporated, vaporized, and mixed with combustion air, and the fuel can be stably combusted and the combustion gas rendered harmless.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a kerosene fan heater according to the present invention, and FIG. 2 is a longitudinal sectional view showing a conventional kerosene fan heater. 5... Combustion catalyst section, 6... Air fan, 7...
Fuel supply nozzle, 9... hot air fan, 12... preheating section, 14... double piping, 15... reversing mixing section.

Claims (1)

[Claims for Utility Model Registration] (1) A fuel supply nozzle that supplies fuel, an air fan that takes in air, a combustion catalyst that burns the fuel mixed with the air, and a combustion catalyst that combusts the fuel mixed with the air, and this combusted gas to the outside. In a kerosene fan heater comprising a hot air fan for discharging warm air, a preheating section made of a porous member is provided at the center of the combustion catalyst section, and connected to the fuel supply nozzle and the air fan on the upstream side of the preheating section, respectively. 1. A fan heater for kerosene, characterized in that double pipes connected to each other are connected, and an inverted mixing section connected to the combustion catalyst section is provided downstream of the preheating section. (2) Utility model registration claim 1, characterized in that the porous member is a ceramic porous plate
Kerosene fan heater as described in section. (3) The kerosene fan heater according to claim 1, wherein the porous member is a ceramic honeycomb molded member.