JPH051662A - Electromagnetic pump for liquid fuel combustion device - Google Patents

Abstract

PURPOSE:To let an expandable filter hardly come off out of the suction port joint of the electromagnetic pump of a liquid fuel combustion device as well as to ventilate the inside of the expandable filter. CONSTITUTION:Projections 2b on which the inner surface of the opening section of an expandable filter 3 is hanged down, are provided for the side surface of the suction port joint 2a of an electromagnetic pump 2. And let one out of the projections be a projection 2c slender in the longer direction of the suction port joint in such a way that a gap 2e for venting air is formed between the expandable filter and the suction port joint. By this constitution, the expandable filter is thereby made to hardly come off by means of the projections. In addition, air is vented through a gap formed at both the sides of the slender projection, and this constitution thereby eliminates the air intake action of the electromagnetic pump.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic pump for a liquid fuel combustion apparatus used in a hot air heater.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view of a conventional liquid fuel combustion apparatus. In the figure, 1 is a fuel tank, 2 is an electromagnetic pump installed on the upper surface of the fuel tank 1, and a foaming filter 3 is attached to a suction port joint 2 a of the electromagnetic pump 2 and is immersed in a liquid fuel 4. A fuel pipe 5 communicates with a vaporization chamber 9 in the vaporizer 6. 7 is a preheater, 8 is a thermistor, 10 is a jet nozzle, 11 is a throat, 12 is a burner head, 13 is a flame, 14 is a needle, and 15 is a solenoid valve.

Next, the operation will be described. Preheater 7
When the carburetor 6 is heated by the energization to, and the temperature of the vaporization chamber 9 reaches 200 to 300 ° C., the thermistor 8 functions,
The electromagnetic pump 2 operates, the fuel 4 in the fuel tank 1 is sucked through the foaming filter 3 and the suction port joint 2a, and is supplied into the vaporization chamber 9 through the fuel pipe 5. The fuel 4 is vaporized by heating, and the vaporized gas is sent to the ejection nozzle 10. At the same time, the solenoid valve 15 operates, the needle 14 descends, the ejection nozzle 10 opens, and the vaporized gas ejects to the throat 11. Combustion air also enters the throat 11 at the same time by this jetting energy, is appropriately mixed, and is ignited on the burner head 12 by an appropriate ignition means (not shown) to form a flame 13. When extinguishing the fire, the electromagnetic pump 2 is stopped and the needle 14 is raised by the electromagnetic valve 15 to close the ejection nozzle 10. Foaming filter 3
When the liquid fuel 4 contains dust or water, the electromagnetic pump 2 sucks the dust and water to remove the dust and water so as not to adversely affect the pump lock and the combustion. , Which is generally used.

[0004]

The conventional liquid fuel combustion apparatus is configured as described above, and the foaming filter 3 inserted into the suction port joint 2a of the electromagnetic pump 2 is immersed in the fuel 4 for a long time. When servicing, if the electromagnetic pump 2 is taken out, it will come off the oil pan and come off, and it will be very difficult to take out the foamable filter 3. If the liquid fuel is started to be used before the foamable filter 3 is sufficiently spread at the beginning of the season, the electromagnetic pump 2 sucks the air in the foamable filter 3 and the liquid fuel enters the vaporization chamber 9. There was a problem that defective combustion occurred because it was not sent.

The present invention has been made in order to solve the above-mentioned problems, and ensures that the foamable filter is securely attached to the suction port joint of the electromagnetic pump so as not to come off due to swelling. An object of the present invention is to obtain an electromagnetic pump of a liquid fuel combustion device in which air is reliably removed so that the electromagnetic pump does not suck air in the foaming filter.

[0006]

In order to achieve the above object, in an electromagnetic pump of a liquid fuel combustion apparatus according to the present invention, a required number of projections are provided on a side surface of a suction port joint to engage an inner surface of an opening of a foaming filter. It is provided. Further, at least one of the protrusions is a protrusion elongated in the longitudinal direction of the suction port joint so that a gap for air escape is formed between the foaming filter and the suction port joint.

[0007]

When the foaming filter is attached to the suction port joint of the electromagnetic pump, the projection catches on the inner surface of the opening of the foaming filter to prevent the foaming filter from coming off. Further, by making at least one of the protrusions elongated in the longitudinal direction of the suction port joint, the foaming filter can be easily mounted, and a gap through which air escapes can be formed between the foaming filter and the suction port joint. Therefore, the air suction of the electromagnetic pump is eliminated.

[0008]

1 is a cross-sectional view of an electromagnetic pump according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of an essential part. This example
The suction port joint 2a of the electromagnetic pump 2 is provided with four claw-shaped projections 2b on the upper side surface at equal intervals. These projections 2b hook the inner surface of the opening 3a of the foaming filter 3. Other than this electromagnetic pump, it has the same configuration as the conventional example of FIG.

In this embodiment, the foaming filter 3
When is inserted into the suction port joint 2a of the electromagnetic pump 2, the foaming filter 3 enters along the taper of the protrusion 2b and stops when the bottom of the foaming filter 3 hits the tip of the suction port joint 2a. At this time, the edge portion of the protrusion 2b is caught in the inner surface of the opening 3a of the foamable filter 3 and is caught in the opening 3a. There is no such thing.

Next, FIG. 3 is a cross-sectional view showing another embodiment of the present invention, and FIG. 4 is a cross-sectional view of the main part. In the above embodiment, the protrusion 2b is formed to be relatively small and short, whereas
In this embodiment, at least one projection has a suction port joint 2
The projection 2c is formed in a slender tapered shape in the longitudinal direction of a. The taper angle is formed such that the height of the protrusion 2c gradually increases from the suction port 2d side, and the foaming filter 3
To make it easier to insert. Although the projection 2b of the above-described embodiment is not shown in FIGS. 3 and 4, the small projection 2b may be provided on the side opposite to the elongated projection 2c.

In the above-described embodiment, since all the small protrusions 2b are used, there is almost no space for air to escape from both sides of these small protrusions 2b. However, in this embodiment, since the elongated protrusions 2c are used, the foaming filter 3 is used. At the time of mounting, a gap 2e through which air escapes is formed on both sides of the elongated protrusion 2c. Therefore, the air in the foamable filter 3 escapes from the gap 2e, and the air suction of the electromagnetic pump 2 can be prevented. That is, in the conventional case, after the season is over, the liquid fuel is usually drained from the fuel tank 1 for storage, but at that time, air enters the foamable filter 3. And when refilling liquid fuel in the next season,
Without the elongated protrusions 2c, the air in the foaming filter 3 could not be exhausted well, the electromagnetic pump 2 sucked in the air, and the fuel could not be sent to the vaporization chamber 9 and could not be burned. In the embodiment, since the opening of the foamable filter 3 is expanded by the elongated protrusion 2c, air escapes from the gap 2e, the air suction of the electromagnetic pump 2 is eliminated, and stable combustion can be maintained.

[0012]

As described above, according to the present invention, the suction port joint of the electromagnetic pump is provided with the projection, and the projection is used to hook the inner surface of the opening of the foamable filter. Therefore, even if it swells, it does not come off easily, and it is possible to prevent the foamable filter from falling off during service. Further, by forming at least one of the protrusions as an elongated protrusion, there is a gap through which air can escape on both sides of the elongated protrusion, and the air in the foamable filter escapes through these gaps, so that the air suction of the electromagnetic pump does not occur. There is an effect that stable combustion can be sustained.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a transverse cross-sectional view of a main part of the above embodiment.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of the embodiment shown in FIG.

FIG. 5 is a configuration diagram of a conventional liquid fuel combustion device.

[Explanation of symbols]

2 Electromagnetic pump 2a Suction port joint 2b protrusion 2c elongated protrusion 2e gap 3 Foaming filter 3a opening

Claims (2)

[Claims] 1. In an electromagnetic pump of a liquid fuel combustion apparatus in which a foam filter is attached to an inlet joint of an electromagnetic pump for feeding liquid fuel to a vaporizer, an inner surface of an opening of the foam filter is provided on a side surface of the inlet joint. An electromagnetic pump for a liquid fuel combustion apparatus, which is provided with a protrusion for hooking. 2. In an electromagnetic pump of a liquid fuel combustion apparatus in which a foaming filter is attached to a suction port joint of an electromagnetic pump for feeding liquid fuel to a carburetor, a gap through which air escapes between the foaming filter and the suction port joint. An electromagnetic pump for a liquid fuel combustion apparatus, characterized in that a long and slender projection is provided in a longitudinal direction on a side surface of the suction port joint so as to enable the above.