CN1208837A - Liquid fuel combustion apparatus - Google Patents

Abstract

A liquid fuel combustion device capable of improving ignition performance even when the external temperature is relatively low, comprising an oil leveler 9 for forming a liquid fuel leveler, and a carburetor 2 for delivering liquid fuel through the oil leveler 9 . The air blower 14 that supplies the primary air for combustion to the carburetor 2 and pressurizes the fixed oil surface of the aforementioned oil level device 9 vaporizes the liquid fuel in the aforementioned carburetor 2 and mixes it with the primary air for combustion, Premixed gas is formed for ignition and combustion. In this liquid fuel combustion device, a heater 12 for heating the aforementioned oil leveler 9 is also provided to heat the liquid fuel supplied to the carburetor 2 so that its temperature is a predetermined value. temperature.

Description

liquid fuel burner

The invention relates to a gasification type liquid fuel combustion device which sends liquid fuel to a carburetor through an oil leveler and mixes the liquid fuel with primary air for combustion to burn.

This conventional liquid fuel combustion device is shown in Figure 3, a carburetor 2 is installed in the carburetor housing 1 supplied with combustion air by a blower 14, and a gasification device is buried on the peripheral wall of the carburetor 2. Heater 3. The lower part of the peripheral wall of the carburetor 2 is provided with an introduction port 4 for primary air for combustion. At the same time, a burner head 5 with several flame holes 6 is installed on the opening of the carburetor 2 top. The upper periphery of the device 2 is equipped with a flame-holding ring 7 for the primary flame. In addition, on the upper part of the carburetor housing 1, a secondary air guide ring 8 covering the aforementioned flame-holding ring 7 is installed. 9 is to form a fixed oil for liquid fuel. The fixed oil surface device of surface, 10 is fuel pipe. 11 is an air inlet for introducing combustion air into the carburetor housing 1 from a blower 14 to be described later.

The above-mentioned oil leveler 9 has a fuel storage part 15, and this fuel storage part 15 holds a certain amount of liquid fuel by overflowing when the liquid fuel reaches the opening. The fuel pump 16 of the part 15, the pressurized supply pipe 18 and the fuel pipe 10 that send the pressurized air into the oil leveler 9, wherein the pressurized supply pipe 18 sends the air to the carburetor shell through the blower 14 The air supply pipe 17 in the body 1 is branched in the middle, and the fuel pipe 10 communicates with the above-mentioned fuel storage part 15, and guides the liquid fuel pressurized by the above-mentioned pressurized air into the carburetor. 19 is a fuel tank.

In the above structure, the interior of the carburetor 2 is heated to a high temperature state by the heater 3 for vaporizing the liquid fuel, the primary air for combustion is supplied to the interior of the carburetor 2 through the primary air inlet 4, and the liquid fuel passes through the fixed oil surface. The fuel pipe 10 communicating with the fuel storage portion 15 of the carburetor 9 is also supplied to the inside of the carburetor 2, and at this time, the liquid fuel is vaporized and mixed with the primary air. The mixed gas is ejected from several flame holes 6 of the burner head 5 after passing through the upper opening of the carburetor 2 . The mixed gas ejected from these flame holes 6 is ignited by an ignition plug (not shown in the figure), forms a primary flame from the burner head 5 along the inner peripheral surface of the flame retaining ring 7 and burns. On the other hand, the secondary air jetted from the gap 11 between the upper end of the flame retaining ring 7 and the guide ring 8 and between the upper end of the flame retaining ring 7 and the guide ring 8 is supplied to the primary flame, promote secondary combustion.

In the above-mentioned conventional liquid fuel combustion device, because the temperature of the liquid fuel in the constant oil surface device 9 is relatively low, and the viscosity of the liquid fuel is high, it is very difficult to supply a predetermined amount of liquid fuel from the fuel pipe 10 to the carburetor 2. Can only supply the carburetor 2 with the liquid fuel less than predetermined amount, in addition, if the temperature of the liquid fuel supplied to the carburetor 2 is relatively low, only relying on the temperature produced by the electric heater embedded in the carburetor 2 li is very low. It is difficult to gasify the liquid fuel, so that the mixing ratio with the primary air and the state of the mixed gas deteriorate, and problems such as failure to ignite or difficulty in igniting occur.

The present invention aims to solve the above problems, and its purpose is to provide a liquid that improves the mixing state of the primary air in the carburetor by heating the liquid fuel supplied to the carburetor, makes the liquid fuel easy to vaporize, and improves ignitability Fuel burning device.

The liquid fuel combustion device provided by the present invention comprises a fixed oil level device for forming a fixed oil level of the liquid fuel, a carburetor for delivering the liquid fuel through the fixed oil level device, supplying primary air for combustion to the carburetor and The air blower that pressurizes the fixed oil surface of the aforementioned oil level device vaporizes the liquid fuel in the aforementioned carburetor and mixes it with the primary air for combustion to form a premixed gas for ignition and combustion. In this liquid fuel combustion device Among them, a heater for heating the liquid fuel in the aforementioned oil leveler is also provided.

In addition, in the liquid fuel combustion device provided by the present invention, a PTC (Positive Temperature Coefficient) heater is provided on the outer periphery of the aforementioned oil leveler, and the liquid fuel is heated by the PTC heater.

Furthermore, in the liquid fuel combustion device provided by the present invention, the energization of the heater provided on the outer periphery of the aforementioned oil leveler and the energization of the gasification heater for heating the carburetor are performed together.

Fig. 1 is a cross-sectional view showing main parts of a liquid fuel combustion apparatus according to Embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view showing main parts of a liquid fuel combustion device according to Embodiment 2 of the present invention.

Fig. 3 is a cross-sectional view showing main parts of a conventional liquid fuel combustion device.

Example 1

Hereinafter, Embodiment 1 of the liquid fuel combustion apparatus of the present invention will be described with reference to the drawings.

Fig. 1 is a cross-sectional view showing main parts of a liquid fuel combustion apparatus according to Embodiment 1 of the present invention.

In Fig. 1, 1 is a carburetor housing, 2 is a carburetor with a heater 3 for gasification of liquid fuel buried on the peripheral wall, 4 is a primary air introduction port arranged at the lower part of the carburetor 2 peripheral wall, and 5 is a The burner head has several flame holes 6 and 9 arranged on the upper opening of the carburetor 2, and 9 is an oil surface device with a heater 12 on the outer periphery; 10 is a fuel pipe; into the air inlet in the carburetor housing 1. 7 is the flame-holding ring of the primary flame that is arranged on the outer periphery of the carburetor 2 top, and 8 is the secondary air guide ring that covers the flame-holding ring 7 on the carburetor housing 1 top.

The above-mentioned oil leveler 9 has a fuel storage part 15, and this fuel storage part 15 holds a certain amount of liquid fuel by overflowing when the liquid fuel reaches the opening. The fuel pump 16 of the part 15, the pressurized supply pipe 18 and the fuel pipe 10 that send the pressurized air into the oil leveler 9, wherein the pressurized supply pipe 18 sends the air to the carburetor shell through the blower 14 The air supply pipe 17 in the body 1 is bifurcated in the middle, and the fuel pipe 10 communicates with the above-mentioned fuel storage part 15, and the liquid fuel pressurized by the above-mentioned pressurized air is introduced into the carburetor 2 through the fuel hole 20. 19 is a fuel tank .

In the above structure, the interior of the carburetor 2 is heated to a high temperature by the heater 3 for vaporizing the liquid fuel, and the primary air for combustion is supplied to the interior of the carburetor 2 through the primary air inlet 4. The wind pressure pressurizes the fuel storage portion 15 of the oil leveler 9 through the pressure supply pipe 18 , thereby supplying liquid fuel from the fuel pipe 10 to the inside of the carburetor 2 through the fuel hole 20 . In this way, the liquid fuel is vaporized and mixed with the primary air. The mixed gas is ejected from several flame holes 6 of the burner head 5 after passing through the upper opening of the carburetor 2 . The mixed gas ejected from these flame holes 6 is ignited by an ignition plug (not shown in the figure), forms a primary flame and burns. On the other hand, the secondary air ejected from the gap 13 between the upper end of the flame retaining ring 7 and the upper end of the guide ring 8 is supplied to the primary flame to promote secondary combustion.

According to the above structure, the liquid fuel supplied to the carburetor 2 can be heated to a predetermined temperature by energizing the heater 12 provided on the outer periphery of the oil leveler 9 to heat up the liquid fuel in the oil leveler 9 . Accordingly, the viscosity of the liquid fuel is appropriately reduced, and a predetermined amount of liquid fuel can be supplied to the carburetor 2 . In addition, compared with the case where the liquid fuel is vaporized only by the gasification heater 3 embedded in the carburetor 2, by raising the temperature of the liquid fuel in the oil leveler 9, the carburetor can be easily realized. The gasification of the liquid fuel in 2 keeps the primary air ratio (primary air volume/theoretical air volume) constant. Through the above, even when the external temperature is relatively low and the temperature of the liquid fuel is relatively low, since the liquid fuel in the oil leveler 9 can be heated, the viscosity can be appropriately reduced to prevent the primary air ratio from rising. , improved ignition performance.

Further, by making the energization to the heater 12 installed on the outer periphery of the oil leveler 9 and the energization to the gasification heater 3 for heating the carburetor 2 be carried out together, the liquid fuel can be heated effectively, and further The mixing state of the liquid fuel and the primary air is improved, and the vaporization of the liquid fuel in the carburetor 2 is easier.

Example 2

Fig. 2 is a cross-sectional view showing main parts of a liquid fuel combustion device according to Embodiment 2 of the present invention. In this second embodiment, the PTC heater 12a is used as the heater for heating the liquid fuel in the oil leveler 9 in the first embodiment above.

According to this structure, in addition to the effect of the above-mentioned embodiment 1 can be obtained, since the PTC heater 12a is used as the heater to heat the liquid fuel in the oil leveler 9, even if no special temperature control is performed, It is also possible to keep the temperature of the liquid fuel in the constant oil surface device 9 at a constant value by applying a simple voltage, which reduces the cost, and in the case of changes in the body temperature and the external temperature, the temperature of the liquid fuel can also be kept constant, which is further stable ignition performance.

As mentioned above, the liquid fuel combustion device of the present invention includes a fixed oil level device for forming a fixed oil level of liquid fuel, a carburetor for delivering liquid fuel through the fixed oil level device, and supplying primary air for combustion to the carburetor. The fuel tank and the air blower that pressurizes the fixed oil surface of the aforementioned oil level device vaporizes the liquid fuel in the aforementioned carburetor and mixes it with the primary air for combustion to form a premixed gas for ignition and combustion. In the fuel burner, a heater is also provided to heat the liquid fuel in the aforementioned oil leveler, therefore, even if the outside temperature is relatively low and the temperature of the liquid fuel is relatively low, since it can heat the liquid in the oil leveler The liquid fuel is heated to reduce the viscosity appropriately, stabilize the liquid fuel supply to the carburetor, and stabilize the primary air ratio. In addition, it is only heated by the gasification heater buried in the carburetor. Compared with the situation, the gasification of the liquid fuel in the carburetor can be easily realized, and the ignition performance is improved.

In addition, according to the liquid fuel combustion device of the present invention, since the PTC heater is used as the heater for heating the liquid fuel in the aforementioned constant oil surface device, even if a special temperature control circuit is not provided, it can be heated by applying a simple voltage. To keep the temperature of the liquid fuel in the oil leveler at a constant value, the cost is reduced, and the temperature of the liquid fuel can also be kept constant when the temperature of the body and the outside temperature change.

Furthermore, according to the liquid fuel combustion device of the present invention, since the energization of the heater for heating the liquid fuel in the aforementioned oil leveler and the energization of the gasification heater for heating the carburetor are performed simultaneously, therefore, It can effectively heat the liquid fuel, further improve the mixing state of the liquid fuel and the primary air, and make the vaporization of the liquid fuel in the carburetor easier to realize.

Claims (3)

1, a kind of burning apparatus for combustion of liquid fuel, comprise the stand oil face device that is used to form liquid fuel stand oil face, carry the carburetor of liquid fuel, burning supplied with this carburetor with primary air and the pressure fan of the stand oil face pressurization of aforementioned stand oil face device by this stand oil face device, in aforementioned carburetor, make liquid fuel gasification and with the burning mix with primary air, form pre-mixed gas, carry out ignition, it is characterized in that, also be provided with heater aforementioned stand oil face device heating.

2, burning apparatus for combustion of liquid fuel according to claim 1 is characterized in that, described heater adopts ptc heater.

3, burning apparatus for combustion of liquid fuel according to claim 1 is characterized in that, carries out for the energising of aforementioned heater and the gasification that carburetor is heated jointly with the energising of heater.

Images