JPS63108121A - Petroleum stove - Google Patents

Abstract

PURPOSE:To permit the indication of the amount of kerosene remaining in a reserved kerosene tank, or the estimation of a time permitting continuing combustion, at all times, by obtaining and indicating the remaining amount of kerosene from the weight of the reserved kerosene tank, which is detected by a weight detecting means. CONSTITUTION:An electrostatic capacity type weight sensor element 10, having an alumina diaphragm with the diameter of 24mm for example, is employed and when an extraordinary heavy weight is impressed on a support panel 9, a leaf spring 11 is bent, the tip end 17 of a holding metal 16 comes in contact with a tank 6 and a load, heavier than the weight, will never be impressed on a loading point 12. The electrostatic capacity of said sensor element is changed 53-65pF with respect to the change of the amount of kerosene of 0-5l whereby a change within 0.01-0.02pF can be detected stably with a simple circuit constitution. Accordingly, the change of the amount of kerosene of about 5-10cc may be detected stably and simply. Further, the amount of consumption of kerosene is about 2-5cc/min in a normal combustion condition, therefore, the decreasing amount of the kerosene may be detected every several minutes.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a kerosene stove, and more particularly to a kerosene stove with a kerosene remaining amount indicator in a reserve kerosene tank.

BACKGROUND OF THE INVENTION Conventionally, in this type of kerosene heater, the amount of kerosene remaining in the tank was displayed using a float or the like, but there was no device that displayed the amount of kerosene remaining in the reserve tank.

Therefore, the remaining amount of kerosene in the tank, such as a float, was activated only when the kerosene in the reserve tank ran out, that is, when the supply of kerosene from the reserve tank to the tank stopped. For this reason, although it depends on the tank volume, the time when kerosene runs out is approximately 3
The kerosene remaining level indicator did not work until about 0 minutes to 1 hour before the scheduled time.

Problems to be Solved by the Invention Accordingly, conventional kerosene heaters have a problem in that it is not possible to know several hours in advance when the kerosene has run out.

The present invention is intended to solve these problems, and aims to always display the amount of kerosene in the reserve tank or the estimated combustible time.

Means for Solving the Problems The present invention was developed based on the above circumstances, and its gist is to constantly detect the weight of the reserve tank.

Function The present invention constantly detects the weight of the reserve tank as described above, and therefore can always display the remaining amount of kerosene or the possible continuous combustion time.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. FIG. 1 shows a kerosene stove 20 according to an embodiment of the present invention.
A perspective view of the figure is shown. 1 is a combustion tube that burns kerosene, 2 is a knob that moves the wick up and down to control the amount of kerosene, 3 is a lid for putting in and taking out a spare tank for replenishing kerosene, and 4 is a lid for controlling the amount of kerosene remaining in the tank. The indicator 6 is an indicator of the remaining amount of kerosene in the reserve tank.

FIG. 2 shows a sectional view of the reserve tank portion of the kerosene stove main body 2o. 6 is a kerosene tank for the kerosene stove 20, 7 is a kerosene reserve tank, and the lid 3 is opened and closed to open and close the kerosene stove 20.
Attach/detach. 8 is a valve of the reserve tank; 9 is a support plate for the reserve tank whose one end is rotatably fixed at a fulcrum 9; 1o is a weight sensor element having an alumina diaphragm; 11 is a leaf spring attached to the support plate 9; 12 13 is a load point fixed on the weight sensor element 1o, and 13 is a protrusion made of Teflon provided on the side wall to vertically support the reserve tank 7 on the support plate 9.

FIG. 3 is a perspective view of the support plate 9. 14 is spare tank 7
Through holes 16 are provided on both sides of the through hole 14 for passing the kerosene replenishment port, and show protrusions for receiving the weight of the reserve tank 7. A concave portion for receiving the protrusion 16 is provided on the reserve tank 7 side (not shown). Since the protrusions 16 are provided on both sides of the through hole 14, rotation of the support plate 9 of the reserve tank in the width direction is suppressed. Furthermore, rotation of the support plate 9 in the longitudinal direction is suppressed by the projections 13. Therefore, the weight of the reserve tank 7 can be accurately transmitted to the weight sensor element 10.

FIG. 4 is a detailed view of the weight sensor element section. Reference numeral 16 denotes an inverted U-shaped holding fitting that is attached to the support plate 9 and supports the leaf spring 11, and has an effective width of 45mm, and the leaf spring 11 has a width of 2offlls.
+, a plate thickness of 0.6ffff was used. φ at the load point
A conical protrusion with a flat bottom surface of 6ffff was used.

As the weight sensor element 10, a capacitive weight sensor element having an alumina diaphragm with a diaphragm diameter of φ24ff was used. When an abnormally large weight is applied to the support plate 9,
The leaf spring 11 is bent, the tip 17 of the holding fitting 16 contacts the tank 6, and no further load is applied to the load point 12.

FIG. 6 shows a characteristic diagram of the weight sensor element.

When the amount of kerosene changes from 0 to 61, the capacitance changes from 63 to a6p.
F indicates a change. 0.01 to 0 with a simple circuit configuration
．． It was possible to stably detect a change of 0.02 pF. Therefore, it was possible to stably and easily detect changes in the amount of kerosene of about 6 to 10 cc.

Therefore, in the kerosene stove of the present invention, 0.11
It was possible to display the remaining amount of kerosene in units.

Furthermore, since it has a detection ability of 6 to 10 CC, the kerosene consumption is approximately 2 to 6 cc under normal combustion conditions.
Since the amount of kerosene reduction can be detected at intervals of several minutes, it is possible to constantly monitor the combustion status as a combustion monitor, and it has been found that it is also possible to interrupt combustion if an abnormality in the rate of kerosene reduction is detected.

Next, another embodiment of the present invention will be described using FIG. 6. A helical spring 18 is attached to the end of the support plate 9, and the support plate 9
This is one end of which is hung.

The spring constant of the spring 18 is determined by the L-shaped metal fitting 19 attached to the tip of the support plate 9 when the reserve tank 7 is at its maximum weight (6A of kerosene).
The vertical movement was set to be about 15fl. 2o indicates a knob of a sliding variable resistor 21 that slides as the metal fitting 19 moves up and down.

FIG. 7 shows a characteristic diagram. For a change in kerosene amount from 0 to 61,
It is shown that the resistance value change was 6 to 30 Ω. 0
．． There is a change in O and SXΩ for a change in the amount of kerosene of 11, and it is considered to be very easy to display the remaining amount of kerosene in units of 0.11.

Effects of the Invention As described above, the kerosene stove of the present invention provides the following effects.

(1) Since the weight of the reserve tank is detected, the remaining amount of kerosene can be displayed at all times.

(2) Since minute changes in the remaining amount of kerosene can be detected, abnormalities (changes) in the combustion state of kerosene can be detected.

[Brief explanation of the drawing]

Fig. 1 is a kerosene stove based on an embodiment of the present invention, 2nd clothes 'd3 (B, i4 @, 'le figure is an enlarged view of the main parts of a kerosene stove based on an embodiment of the present invention, 6%, 77 Figures 3, 4, and 5 are shown in Examples.

Claims (3)

[Claims] (1) A kerosene stove comprising means for detecting the weight of a spare kerosene tank, and means for determining and displaying the remaining amount of kerosene based on the weight of the spare kerosene tank detected by the weight detecting means. (2) The kerosene stove according to claim 1, wherein the means for detecting weight is constituted by a capacitive weight sensor having an alumina diaphragm. (3) The kerosene stove according to claim 1, wherein the means for detecting weight is constituted by a weight sensor made of a helical spring.