JPH0126972Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a liquid fuel gasification type combustion stove having an oil burner that forcibly injects fuel oil in the form of mist into a combustion section and burns it.

(Prior Art) Among the combustion type stoves that are widely used in general households, for example, kerosene stoves are often of the cartridge tank type, as known from Japanese Utility Model Application Publication No. 123201/1983.

This type of kerosene stove has a structure as schematically shown in FIG. ), the oil level is maintained while self-supplying with oil, and when this oil level becomes abnormal, an oil level detection switch 33 in the oil pan 32 issues an alarm. However, the cartridge tank 31 must have a sealed structure, which is a special device, and an alarm system using the oil level detection switch 33 is required, which increases the cost of the system.

Moreover, in order to prevent oil from overflowing even in the oil head, which takes into account gas expansion due to heating of the air in the cartridge tank 31, this stove inevitably requires a large oil pan, and the cartridge tank 31 The size itself is limited, so it is common to have a size of 10 or less, and a large-capacity type cannot be expected, and the problem is that oil replenishment work is forced repeatedly.

Furthermore, if the cartridge tank 31 loses its sealing performance due to the formation of pinholes during long-term use, oil may leak out abnormally, creating a serious safety problem.

On the other hand, a model with a separate oil tank was developed in 1983.
It is known from Publication No. 77214, etc., but this is
As shown in FIG. 4, the leveler 35 is essential for keeping the oil level in the pump chamber 34 constant and stabilizing the discharge amount of the oil pump 36 at a predetermined value.
Since a space for installing the leveler 35 and a space for piping provided between them is required, it is difficult to make the structure compact.

Further, even if the oil is removed from the leveler 35, the nozzle (orifice) 37 in the oil pump 36 remains immersed in oil during the off-season, and the nozzle 37 becomes clogged due to the sticky components in the oil. However, there was also the inconvenience that it could not be used as is during the next heating season.

(Purpose of the invention) The present invention was made with the technical objective of eliminating the various defects that such conventional combustion stoves have, and the purpose of the present invention is to solve the following problems in liquid fuel gasification combustion stoves: By adopting a two-stage structure for the oil storage system associated with the suction section of the oil pump, the oil suction head can be held constant regardless of fluctuations in the oil amount, thereby stabilizing combustion. Exists.

(Structure of the invention) For this purpose, the present invention provides a combustion type stove that has an oil burner in which oil can be sucked up by an oil pump installed in the oil tank and discharged to the combustion section, and the internal volume is smaller than that of the oil tank. A pump cover formed in the shape of a fairly small container is disposed within the oil tank so as to surround the side periphery and lower part of the oil pump,
An overflow port is provided on the side wall at a position higher than the oil level in the oil tank, and an oil relief hole is provided on the bottom wall, while a flow type electromagnetic pump with a larger discharge flow rate than the oil pump is installed in the oil tank. The pump has a structure in which the suction part and the discharge part thereof are connected to the inner bottom of the oil tank and the inside of the pump cover, respectively, and the oil in the pump cover is energized by energizing the electromagnetic pump. By forcing the oil to circulate inside the tank, the oil level inside the pump cover can be kept stable at all times at the location where the overflow port is installed, so the amount of oil and fuel sprayed by the oil burner can be maintained constant and combustion can be stabilized. can be accomplished.

(Example) Hereinafter, an example shown in the accompanying drawings will be described in detail.

FIG. 1 is a front view showing the main structure of one example of the stove of the present invention, in which 1 is an oil tank that also serves as a base;
2 is an outer frame fixed on the oil tank 1, 3 is a combustion tube,
4 is an oil burner provided between the oil tank 1 and the combustion cylinder 3.

In the oil burner 4, 5 is a double-shaft motor with a hollow drive shaft 7 vertically arranged, and 6 is coaxially connected directly below the double-shaft motor 5, and is driven by the motor 5. The oil pump 6 has a pump chamber covered by a vertical cylinder housing 8 and a cap 9 attached to the lower end of the housing 8, and the pump chamber is located at the drive shaft. An oil sump chamber 10 is partitioned into an upper and lower section by a partition plate that freely passes through 7, and the upper chamber is surrounded by a side wall made of a perforated plate to store oil.
In addition, a lower chamber is formed in each of the rotor chambers 11 communicating with the oil reservoir chamber 10.

Inside the rotor chamber 11, a drive shaft 7 having a nozzle 13 fixed to its tip extends to the center, and an oil rotor 12 is fixed to this drive shaft 7, and rotates as the drive shaft 7 rotates. The oil rotor 12 is configured to suck oil from the oil reservoir chamber 10 into the rotor chamber 11 and then send it into the hollow portion of the drive shaft 7 through the nozzle 13.

The oil burner 4 has a fan section 18, a carburetor 19, and a flame port 20 coaxially arranged above the double-shaft motor 5 in order from below. A drive shaft 7 extends vertically.

A plate fan 21 fixed to the drive shaft 7 is housed in the fan section 18, while a carburetor 1
9 has a diffusion plate 22 fixed to the upper end of the drive shaft 7.
and a diffusion vane 23 are housed therein.

The oil burner 4 configured in this manner discharges oil fed into the hollow part of the drive shaft 7 by the oil pump 6 in a horizontal direction from a plurality of discharge ports provided in the wall of the drive shaft 7 directly below the diffusion plate 22. The discharged oil is atomized in the process of being diffused by the diffusion plate 22 and the diffusion vanes 23, and the vaporizer 19 is filled with the atomized oil.

On the other hand, the air sent into the fan section 18 by the rotation of the plate fan 21 is sent into the vaporizer 19, and after this air and the atomized oil are sufficiently mixed in the vaporizer 19, Since it is heated by the preheater 24, it becomes combustion gas and reaches the flame port 20, where it is ignited and combusted by the discharge arc from the ignition electrode rod 26.

In the stove having the above-described structure, a pump cover 14 and a flow type electromagnetic pump 15 are respectively disposed in relation to the oil tank 1.

The pump cover 14 is shaped like a container with an open top and has a considerably smaller internal volume than the oil tank 1, and is enclosed in the oil tank 1 by surrounding the side and lower part of the oil pump 6 as shown in the figure. Arrange.

This pump cover 14 is disposed at a high position in the oil tank 1 so that its peripheral wall vertically crosses the standard oil level level of a predetermined amount of oil stored in the oil tank 1, and A considerable number of overflow ports 16 as shown in the second figure are provided on the side wall at a position higher than the oil level.

Further, the pump cover 14 is also provided with an oil release hole 17 on the bottom wall.

On the other hand, the electromagnetic pump 15 has a suction section surrounded by a filter 25, such as a lower end opening of the suction pipe, which is connected to the inner bottom of the oil tank 1, and a discharge section which is connected to the inside of the pump cover 14 via piping. and is fixed to the upper wall of the oil tank 1.

Therefore, it is desirable that the pump cover 14 has a shape similar to the pump chamber of the oil pump 6 so that the volume of the reservoir is considerably smaller than the volume of the oil tank 1. On the other hand, the electromagnetic pump 15 is It is preferable that the oil has the ability to supply into the pump cover 14 a flow rate that is about 3 to 4 times the rated fuel consumption amount of the oil supplied to the flame port 20 by the pump 6.

In addition, the overflow port 16 is connected to the electromagnetic pump 15.
The oil relief hole 17 is large enough to release a sufficient amount of overflow oil in accordance with the capacity of the pump, and the oil relief hole 17 is an oil head from the oil level in the pump cover 14, and is large enough to discharge a sufficient amount of overflow oil according to the capacity of the pump. It is desirable that the size is large enough to allow 0.5 to 1 times the amount of oil to escape.

When a stove with such a structure starts a combustion operation, the electromagnetic pump 15 is energized before the double-shaft motor 5 is driven, so that sufficient oil is secured in the pump cover 14 and excess oil is drained from the overflow port 16. When the oil overflows, the double-shaft motor 6 is energized, that is, the oil burner 4 starts its combustion operation. It is possible to maintain a constant level and eliminate variations in the amount of oil discharged to the combustion section.

On the other hand, when the oil in the oil tank 1 is drained during the off-season, all the remaining oil in the pump cover 14 is returned to the oil tank 1 through the oil relief hole 17, so there is no oil in the pump cover 14. Therefore, inconvenient situations such as solid components such as sludge and sticky components in the oil sticking to and clogging the nozzle or other suction portion of the oil pump 6 can be eliminated.

(Effect of the invention) By keeping the oil level of the pump cover 14 surrounding the suction part of the oil pump 6 constant, the amount of oil sent to the combustion part of the oil burner 4 does not fluctuate. As a result of being maintained stably, it is possible to perform highly stable combustion.

Further, by making the volume of the pump cover 14 considerably smaller, the startup time required to establish the oil level at startup can be shortened, and a rapid heating effect can be achieved.

Furthermore, since an oil release hole 17 is provided in the pump cover 14, when the oil in the oil tank 1 is drained during the off-season, the suction portion of the oil pump 6 is removed so that not a single drop of oil remains in the pump cover 14. It is possible to prevent clogging and save labor in terms of maintenance management.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of one embodiment of the present invention, Fig. 2 is a sectional front view of the pump cover in Fig. 1, and Figs. 3 and 4 are each example of a conventional combustion stove. It is a structural diagram showing main parts. 1...Oil tank, 4...Oil burner, 6...
Oil pump, 4... Pump cover, 15... Flow type electromagnetic pump, 16... Overflow port, 17...
...Oil escape hole.

Claims (1)

[Scope of utility model registration request] An oil burner 4 in which oil can be sucked up by an oil pump 6 installed in an oil tank 1 and discharged to a combustion section.
In the combustion type stove, a pump cover 14 formed in the shape of a container whose internal volume is considerably smaller than that of the oil tank 1 is disposed inside the oil tank 1 so as to surround the side periphery and lower part of the oil pump 6. However, an overflow port 16 is provided in the side wall at a position higher than the oil level in the oil tank 1, and an oil relief hole 17 is provided in the bottom wall, while the flow rate type electromagnetic pump has a larger discharge flow rate than the oil pump 6. 15 is disposed in the oil tank 1, and its suction part and discharge part are connected to the inner bottom of the oil tank 1 and the inside of the pump cover 14, respectively.