JPH02191197A - Liquid feeding apparatus - Google Patents

Abstract

PURPOSE:To reduce memory storage in a control device and simplify a control circuit by providing a liquid discharge control means for controlling the discharge amount in terms of the liquid feed time elapsed from the feed commencement to the detection of the liquid by a liquid detection means. CONSTITUTION:A suction pipe 4 and a discharge pipe 5 are connected to an oil feeder pump 3 and a hose 8 and a nozzle 9 are connected to the discharge pipe 5 provided with a flow meter 6 and a flow amount control valve 7. The nozzle 9 is provided with a liquid surface sensor 10 and an oil feeder 1 with a nozzle switch 11 for detecting the disengagement of the nozzle 9 therefrom. The flow meter 6 is provided with a pulse generator 12 for converting liquid amount to pulse signal and the switching of the flow amount control valve 7 is controlled by a valve driving part 13. The pulse generated by a pulse generator 12 is sent through a control device 14 to an indicator 15 which provides a digital display of the liquid amount measured by the flow meter 6. Signals are sent from the liquid surface sensor 10 and the nozzle switch 11 to the control device 14, thereby controlling a motor 2 and the valve driving part 13.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention includes a liquid detection means provided at the tip of a liquid supply nozzle and a discharge amount control means, and the liquid supply is stopped by liquid detection and the liquid supply is stopped for a certain period of time. This invention relates to an improvement in a liquid supply device that resumes liquid supply later.

[Prior Art] Such a liquid supply device is known (for example, Japanese Patent Application Laid-Open No. 58-30998 by the present applicant).

In this device, control operations as shown in FIG. 4 are performed. That is, when the fluid supply nozzle is removed, the flow rate control valve is fully opened by a signal from the nozzle switch, and when the nozzle is inserted into the fuel filler port of a car and the nozzle lever is pulled, fluid supply with a discharge amount of, for example, 45j/mln is started. (time a), and after a considerable amount of liquid has been supplied, the liquid level sensor, which is the liquid level detection means, emits a liquid detection signal due to bubbles, droplets, etc. (time b), the valve is closed (time C), and After a certain period of time (for example, 3 seconds), the valve is half-opened (time d), and the liquid supply is restarted at a discharge rate of, for example, 30 j/min (
Time e) 0 Next, when the liquid level sensor sends a signal (time f), the valve closes (time g), and after a certain period of time (
At time h), if the previous liquid supply amount B shown in the shaded area is 11 or more, the valve remains half open (time l), and thereafter the liquid supply JEB is 1.
When it becomes 1 or less, the opening becomes small, for example, the discharge JiL10j/
Min liquid is supplied (time m) 0 Next, the valve closes due to the signal from the liquid level sensor, and when it is further opened, the liquid supply IB is 0.5
If it is J or more, the valve remains slightly open (time q) and the liquid supply J
If liLB is 0.5j or less, the valve is slightly opened, for example, discharge EL5j! /min liquid supply is made (time point u)
Then, the liquid supply is stopped by the subsequent signal from the liquid level sensor (time point ■) (time point w).In this way, the next liquid supply amount is determined from the time when the liquid level sensor detects the liquid level after the liquid supply starts until the liquid level sensor detects the liquid level. The discharge amount is controlled to prevent overflow and to shorten the liquid supply time as much as possible.

[Problems to be Solved by the Invention] In the above control operation, the control device has a discharge amount of 304
)/m1n, whether the amount of liquid supplied until the liquid level is detected after the start of liquid supply B is greater or less than 1fJ, or whether the discharge amount is I
on/min, the above liquid supply jlB is 0.5jl/min.
Since it is determined whether it is more than or less than min, a large number of storage devices are required for these determinations, and the control circuit becomes complicated accordingly. ; becomes the value.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid supply device in which a control circuit of an LTI control device can be easily fitted.

[Means for Solving the Problems] According to the present invention, the liquid supply nozzle includes a liquid detection means installed at the tip of the liquid supply nozzle and a discharge amount control means, and the liquid supply is stopped by liquid detection, and the liquid supply is stopped after a certain period of time. The liquid supply device that restarts liquid supply is provided with a discharge amount control means that controls the discharge amount according to the liquid supply time until the liquid detection means detects the liquid after the start of liquid supply.

Preferably, the discharge amount control means is a control device configured with a microcomputer, and the control device is provided with a clock.

It is preferable that the criterion value for the liquid supply time is, for example, 3 seconds, and that the certain period of time is also, for example, 3 seconds.

Further, the discharge amount is preferably controlled to 45.30.10 and 5.rho./m Ln, respectively, by fully opening, half opening, slightly opening, and slightly opening the meteor control valve, or by the rotational speed of the pump motor.

In the liquid supply device configured as described above, the control device half-opens the flow rate control valve to control the discharge amount to 30 n/min.
If the liquid supply time until the liquid is detected and the liquid supply is stopped after the start of liquid supply is longer than 3 seconds, the next discharge amount will be set to 30jl.
/'min, and if it is small, it is controlled to 101/min. In addition, the Meteor control valve was opened halfway and the discharge amount was 10.
When feeding liquid at ρ/man, if the liquid feeding time is longer than 3 seconds, the next discharge rate is controlled to 101/min, and if it is smaller, it is controlled to 5j/min.

As a result, the discharge amount was 304! /min, 1°5!
ll (30X30÷6) or less, and when the discharge rate is 101/min, 0.5fJ (10X3÷6)
0) or less, and if the discharge amount decreases even in the same time of 3 seconds, the amount of liquid supplied also decreases, making it possible to prevent overflow and shorten the liquid supply time as much as possible.

"Example" The present invention will be described in detail below with reference to the drawings.

In FIG. 1, a fuel dispenser 1 has a pump 3 that is driven by a motor 2 in ISK, and a suction pipe 4 and a discharge pipe 5 connected to an oil storage tank (not shown) are connected to the pump 3. This discharge piping 5 is provided with a flow meter 6 and a flow rate control valve 7, and a hose 8 is further connected to this discharge amount g5. A nozzle 9 is connected to this hose 8. A liquid level sensor 10 serving as liquid detection means is attached to the nozzle 9, and the fuel dispenser 1 is provided with a nozzle switch 11 for detecting when the nozzle 9 is removed from the fuel dispenser 1.

The flow meter 6 is provided with a pulse transmitter 12 that converts the liquid amount into a pulse signal, and the opening and closing of the flow control valve 7 is controlled by a valve driving section 13.

The pulse emitted from the pulse generator 12 is a discharge amount control means.

sent to the display 15 via the DI Ill device 14;
The liquid amount measured by the flowmeter 6 is digitally displayed on the display 15. Also, the signal from the liquid level sensor 10 and the signal from the nozzle switch 11 are f
ft control device 14, and the control device 14 controls the motor 2 and the valve IW! 53 section 13 is drive-controlled.

The control device 14 is composed of a microcomputer, is provided with a clock, and controls the discharge amount by the opening degree of the valve 7, but it can also be controlled by the rotation speed of the motor 2.

Next, the operation will be explained mainly with reference to FIGS. 2 and 3.

Remove the nozzle 9 from the refueling machine 1 and set the nozzle switch 11 to O.
When it becomes N (step S1), the control device 14 displays the display 1.
5, return the previous oil supply amount to zero, and turn on pump motor 2.
Fully open valve 7 (step S2), pull the nozzle lever and discharge! 45j! /min refueling is started (time A)
When the liquid level sensor 10 detects the liquid level due to bubbles, splashes, etc. after refueling a considerable amount of fuel and sends a signal (step S3 and time B), the valve 7 is fully closed and the timer waits for the bubbles to disappear.゛Start X (step S4 and time point C). Then, when the clock 1゛x reaches the deflection time TA (for example, 3 seconds) (step S5 and time D), the valve 7 is opened and 31:1゛x
and starts measuring the liquid supply time (Step S
6). Then, the liquid supply with a discharge amount of 30 jl/m1Ω is resumed (time E), and then when the liquid level sensor 10 sends a detection signal (step S7 and time F), the valve 7 is fully closed and the timer [Y] is started. Then, time measurement TX is started (step S8 and time point G).

Next, the clock TY is set to the judgment reference value 'I'B (for example, 3 seconds).
Step S9).

In the case of No, that is, when T Y >'I' B, steps 85 to S8 are repeated (time 8 to time K), Y
If it is ES, then 'I' Y < TB, - after a fixed time TA (step S10 and time point L),
The valve 7 is opened slightly and the timer 'rY is started. Then, when the liquid supply with a discharge rate of 10ρ/min is resumed (time M) and the liquid level sensor 10 sends a detection signal (step S12 and time N), the valve 7 is fully closed and the timer 'rY is stopped. Then, time measurement TX is started (step S13 and time point O)6.Next, it is determined whether or not the time measurement 1'Y is smaller than the determination reference value '1'B (step S14>).

In the case of NO, that is, when 1'Y>"I'H, steps 810 to 313 are repeated from time point 2 to time point S.
), if YES, that is, 'I''Y <'T'
In the case of B, - after a certain period of time (A (step 315 and time T), the valve 7 is slightly opened (step 316), and the liquid is supplied at a discharge rate of 5j/min (at the same time), and then ) When the one-side sensor 10 emits a detection signal (step S17 and time point V), the valve 7 is fully closed (step S18).
and point W), the control ends.

[Effects of the Invention] Since the present invention has been exhausted as described above, the discharge amount when restarting liquid supply is determined by the liquid supply time from the start of liquid supply until the liquid detection means detects the liquid. Since the same time can be used for each discharge amount, the storage device of the control device can be reduced, the control circuit becomes simpler, and it can be provided at a lower cost.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a control flowchart 1, FIG. 3 is a control timing chart, and FIG. 4 is a timing chart of a conventional device. 1... Refueling machine 7... Flow rate control valve 9
...Refueling nozzle 10...Liquid level sensor 14.
...Control device diagram 1

Claims (1)

[Claims] In a liquid supply device that includes a liquid detection means provided at the tip of a liquid supply nozzle and a discharge amount control means, the liquid supply is stopped by liquid detection, and the liquid supply is resumed after a certain period of time. A liquid supply device comprising a discharge amount control means for controlling the discharge amount according to the liquid supply time until the means detects the liquid.