JPH067008B2 - Liquid supply mechanism for cartridge tank - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a valve hole and a tray for receiving a valve hole and a valve body which are provided on a lower surface in a state where a liquid is drawn into a cartridge tank and used. When the cartridge tank is emptied, the valve hole and the valve are used to fill the kerosene when the cartridge tank is empty. The present invention relates to a convenient cartridge tank liquid supply mechanism capable of refueling without removing a cap provided on a body and automatically stopping refueling when a predetermined filling level is reached.

[Background technology]

Conventionally, in a heater such as an oil fan heater, an airtight cartridge tank is used when refueling kerosene as a fuel. However, when refueling the cartridge tank, the cap portion provided with the valve hole and the valve body is removed to expose the opening having a large diameter, and the discharge pipe of the electric pump is inserted from the opening. Although it was done, it is unavoidable from the time and effort to remove the cap part, the stain on the hands and the time and attention and dirt such as the need to tighten the cap accurately so that the cartridge tank is completely sealed when the cap is reinstalled Therefore, in Japanese Patent Application No. 20765 of 1988, which is filed by the same applicant as the present application, the cartridge in which the liquid is injected into the cartridge tank and the liquid level is automatically stopped at a predetermined filling position without removing the cap during refueling Although an injector for a tank is disclosed, the present application, in this injection method, has a cylindrical shape that secures a passage for the liquid to flow into the cartridge tank. Push the body from the valve hole to the required position, smoothly inject the liquid into the cartridge tank from the discharge port of the tubular body, and improve the reliability so as not to interfere with the automatic stop operation of the liquid level It is a proposal for the mechanism.

[Outline of Invention]

In the cartridge tank liquid supply mechanism of the present invention, the gap between the cylindrical body that pushes the valve body through the valve hole and serves as the liquid passage and the guide cylinder that serves as a guide when the valve body moves is set to a certain value or more.
Moreover, the gist is to make the cross-sectional area of the tubular body and the area ratio of the discharge port and the lower end portion of the tubular body an inclined surface, and by defining these values, the tubular body shielded by the lower end portion is described. The prism of the level detection sensor provided at the lower tip is capable of detecting the correct liquid level.

Example of Invention

In FIG. 1, reference numeral 1 indicates an electric pump, for example, a kerosene plastic can 11 (usually a volume of about 18 liters).
Although the liquid feeding pipe 2 is immersed in the liquid 12 such as kerosene through the opening 11A of the above and the lower end of the liquid feeding pipe 2 is omitted, as is well known, the electric motor and the blade are housed, and the housing part is also a vane case. That is, it cooperates with the blades to form a pump, and its lower end is provided with a liquid suction port. When the blade rotates in the blade case by the electric motor, the liquid 12 is sucked up from the suction port, passes through the liquid feeding pipe 2, passes through the connecting portion 3 between the discharging pipe 4 and the liquid feeding pipe 2, and leaks to the tip 4A of the discharging pipe 4. Liquid is supplied into the cartridge tank 13 from the discharge port 5A of the tubular body 5 which is connected so as not to. That is, the cylindrical body 5 connected to the tip 4A of the discharge pipe 4 is inserted from the valve hole 13A provided in the cartridge tank 13 to insert the valve hole 13A.
Spring 13 that always exerts a force in the direction of closing
Push the valve body 13B to the position shown in the figure against the restoring force of C,
At that position, it is fixed to the edge 13E of the cap 13D of the cartridge tank 13 by the claw portion 6B of the clamper 6.

The switch 8 provided on the upper part of the battery housing portion 7 of the electric pump 1 can be moved from the OFF position shown by the solid line in the figure to the ON position on the right side shown by the dotted line. Switch 8
When it is turned on, the liquid 12 in the kerosene plastic can 11 is replenished to the cartridge tank 13 as described above, but the liquid flows into the cartridge tank 13 and its level rises to the almost full position of the level gauge 13G. When it reaches, the level detection unit 5B, for example, a light-emitting diode and a phototransistor provided slightly below the discharge port 5A of the tubular body 5 and housed in a transparent container forming a prism is submerged in the liquid, and a signal from the phototransistor is generated. The control element that supplies current to the motor is turned off and the current to the motor is cut off to stop the pump. For details of this, refer to, for example, the accompanying drawings of Japanese Patent Application No. 20765 of 1988, which is filed by the same applicant as this application, particularly FIG. FIG. 2 shows the tubular body 5 and its vicinity in an enlarged manner. A shielding portion 5C is provided between the discharge port 5A of the tubular body 5 and the level detecting portion 5B so that liquid does not leak. . The sensor S composed of the light emitting diode and the phototransistor housed in the level detecting section 5B is connected to the discharge pipe 4 by the lead wire 5D.
A control element provided in the lower part of the battery housing 7 is connected through the inside to a control unit 9 arranged on a printed board, and the electric motor is connected from the control unit 9 to the connection unit 3 and the liquid feed pipe 2. Wired through.

Here, the gist of the present application will be described with reference to FIGS. The liquid sent from the pump flows out from the discharge port 5A of the cylindrical body 5 as described above, but there is a guide cylinder 13F on which the valve body 13B slides on the outer side of the cylindrical body 5, and the guide cylinder 13F discharges the liquid. exit
A plurality of outlets 13H for the liquid flowing out from 5A are provided. 3 and 4 when the relative positional relationship between the outlet 5A of the tubular body 5 and the outlet 13H of the guide cylinder 13F is changed by 45 degrees in the case where four outlets 13H are drilled Then, the angle θ of the bottom surface 5C of the discharge port 5A in FIG.
Is less than 15 degrees and is about 0 to 5 degrees, a part of the liquid flowing out from the discharge port 5A of the tubular body 5 flows down along the surface of the tubular body 5 at the relative position in FIG. Is attached to the prism of the level detection part 5B from the level detection liquid flow port 5E of the portion containing the transparent container forming the inverted conical prism provided in the vicinity of the lower end of the tubular body 5, and is still sufficient. Even though there is no liquid in the cartridge tank, it malfunctions and stops the electric motor. This phenomenon is the same in the case of the position shown in FIG. 4, but the occurrence degree is slightly less than in the case of FIG. In the case of FIG. 4, the malfunction of the bottom surface 5C is almost 10 degrees, and the malfunction hardly occurs. However, in the positional relationship of FIG. 3, the malfunction occurs occasionally and the bottom surface 5C angle θ is 15 degrees.
It will not occur when the frequency exceeds the limit. However, if the gap G between the outer diameter of the tubular body 5 and the inner diameter of the guide surface 13F is narrowed, a malfunction occurs even if the angle θ of the bottom surface 5C is 15 or more when the distance is 1 mm or less. According to the observation of the experiment, there is no malfunction when the kerosene hitting the inner surface of the guide cylinder 13F flows down along the inner surface of the guide cylinder 13F, but when it comes down along the surface of the tubular body 5, the level detection is performed. Liquid flow port 5E to level detector 5B
Kerosene adheres to the prism surface of and causes malfunction. Even when the number of discharge holes 5A of the cylindrical body 5 was not one as shown in FIGS. 3 and 4 but two as shown in FIG. 5, almost no difference was observed in the results of the experiment. However, if the area of the discharge port 5A of the cylindrical body 5 is made smaller than the inner diameter cross-sectional area of the cylindrical body, the flow velocity is suddenly increased here and the flow is disturbed.
A large amount of liquid was ejected from the nozzle, causing a phenomenon of flowing down along the surface of the tubular body 5, resulting in malfunction. Although the prism of the level detecting unit 5B has been described in the embodiment as an inverted conical shape, it has a triangular shape such as a roof, for example, the attached drawing No. 20765 of the applicant's application in 1988. Similar results were obtained with the photosensor 10p shown in FIG. 1 and the prism having the shape shown in FIG.

〔The invention's effect〕

As described above, when the liquid is supplied to the closed type cartridge tank, the discharge port 5A of the tubular body 5 is provided in the liquid supply mechanism which can be supplied without removing the cap provided with the valve hole and the valve body. If the clearance is larger than the lumen cross-sectional area, the clearance between the cylindrical body 5 and the guide cylinder 13F is set to 1 mm or more, and the bottom inclined surface of the discharge port 5A is inclined by 15 or more, so that the cylindrical body 5 is guided. Even when the positional relationship between the discharge port 5A and the outlet 13H of the guide cylinder 13F is not taken into consideration when inserting it into the 13F, the liquid flowing out from the discharge port hits the guide cylinder and the drop of the liquid drops on the cylindrical body 5. There is no erroneous operation by flowing down the surface, and therefore, the effect that the liquid can be replenished to the full level position defined by the level detecting section is very large.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of the liquid supply mechanism for a cartridge tank according to the present invention with a part thereof omitted, and FIG. 2 is a partial vertical cross-sectional view thereof. And the fourth
The drawing is a cross-sectional view taken along the line XX of FIG. 2, and FIG. 5 is a drawing corresponding to FIG. 3 according to another embodiment. 4 ... Discharge pipe, 5 ... Cylindrical body, 5A ... Discharge port, 5B ... Level detection part, 5C ... Inclined surface, 5E ... Liquid flow port, 10 ... Electric pump, 13 ... Cartridge Tank, 13A ... valve hole, 13B ... valve body, 13C ... spring, 13F ... guide cylinder.

Claims (1)

[Claims] 1. A valve body is always pressed against a valve hole by a restoring force of a spring so that when the liquid in a cartridge tank is normally taken out and used, it is closed except for being opened by a tray on which the tank is placed. When replenishing when the cartridge tank is closed and is empty, the valve body is placed in the reverse position of when the liquid in the normal cartridge tank is taken out, and the refill position is deeper than the normal valve body pushing position. The gap between the outer diameter of the tubular body connected to the discharge pipe of the electric pump for pushing into the liquid cylinder so as not to leak and the inner surface of the guide cylinder that serves as a guide when the valve body moves is set to 1 mm or more. The area of the discharge port of the tubular body is wider than the cross-sectional area of the inner cavity of the tubular body, and the lower end of the discharge port is provided with an inclined surface of 15 degrees or more to shield the liquid surface for controlling the electric pump below. Detection A liquid supply mechanism for a cartridge tank, characterized in that a level detection part accommodating a photosensor is provided in a prism container for use with a liquid flow port for contacting a rising liquid surface with the prism.