JP4672592B2 - Liquid supply device - Google Patents

Description

  The present invention relates to a liquid supply apparatus, and more particularly to a liquid supply apparatus configured to adjust a flow rate of liquid supplied to a liquid supply tank by operating a lever of a liquid supply nozzle.

  For example, when operating an oil supply nozzle (liquid supply nozzle) for supplying an oil liquid (liquid) such as gasoline to an automobile fuel tank (liquid supply tank), the operator holds the nozzle lever of the oil supply nozzle. The liquid supply to the fuel tank can be performed by operating and opening the valve mechanism of the nozzle. In such an oil supply device (liquid supply device) having an oil supply nozzle, the oil level of the oil supplied by the pump is manually adjusted by opening the valve mechanism of the oil supply nozzle by operating the lever of the oil supply nozzle. The flow rate is adjusted (see, for example, Patent Document 1).

  However, the pipe shape of the fuel filler port of an automobile differs depending on the vehicle type and may be bent near the fuel filler port. And when the nozzle lever is operated to the fully open position with the discharge pipe of the oil supply nozzle inserted to the back of the oil supply port, the oil liquid sent by the pump is ejected vigorously on the inner wall of the oil supply port. There was a risk that a part of it bounced off and spilled from the filler port.

In such a case, the operator has returned the operation position of the nozzle lever of the fueling nozzle and reduced the valve opening of the valve mechanism of the fueling nozzle to prevent spilling from the fueling port.
Japanese Patent Laid-Open No. 2004-59018

  Conventionally, however, the operator manually adjusts the operation position of the nozzle lever for refueling. Therefore, the operator must hold the nozzle lever at a predetermined operation position, which imposes a burden on the operator. There was a problem that it took.

  Furthermore, in the case of the self-lubricating method, the customer himself adjusts the nozzle lever operating position, so if a beginner who is unfamiliar with the nozzle lever operation does not know the nozzle lever operating position, the nozzle lever must be There is a problem in that the oil liquid spills by operating to the fully open position, or the valve opening is excessively narrowed by careful operation and the oil supply time is greatly extended.

  Therefore, in view of the above circumstances, an object of the present invention is to provide a liquid supply apparatus that solves the above problems.

  In order to solve the above problems, the present invention has the following means.

The present invention includes a liquid supply nozzle having a lever for adjusting the flow rate of the fluid by manual operation, and a valve mechanism for regulating the flow rate of the liquid supply fluid to the supply tank by the operation of the lever,
A liquid supply path for supplying liquid to the liquid supply nozzle;
A pump for supplying liquid to the liquid supply nozzle via the liquid supply path;
A flow meter for measuring a flow rate of the liquid flowing through the liquid supply path;
Flow rate integrating means for calculating the flow rate by integrating the flow rate pulses output from the flow meter;
A variable throttle provided in the liquid supply path for controlling the flow rate of the liquid discharged from the liquid supply nozzle;
In a liquid supply apparatus having
When the flow rate measured by the flow meter is a constant flow rate, the aperture of the diaphragm the variable so that the maximum discharge flow rate that can be supplied is the constant flow rate below the operation of the lever of the liquid supply nozzle the result is provided a variable throttle adjusting means for controlling,
The variable aperture adjustment means includes
When the constant flow rate is equal to or higher than a predetermined flow rate, the throttle amount of the variable throttle is controlled so that a maximum discharge flow rate that can be supplied by operating a lever of the liquid supply nozzle is equal to or less than the constant flow rate. To do.

The liquid supply nozzle of the present invention is
A discharge pipe through which liquid is discharged;
A negative pressure generating section that generates a negative pressure in the liquid supply nozzle by the flow rate of the liquid; and an air introduction port having one end communicating with the negative pressure generating section and the other end opening near the tip of the discharge pipe. A suction pipe for sucking air, and a liquid level detection mechanism for closing the valve mechanism by negative pressure when the air inlet is closed due to a rise in liquid level due to liquid supply;
With
The variable aperture adjustment means includes
The predetermined flow rate is a predetermined flow rate required for the negative pressure generating unit to generate a negative pressure greater than a predetermined magnitude required for closing the valve mechanism by the liquid level detection mechanism. When the flow rate is equal to or higher than the flow rate, the throttle amount of the variable throttle is controlled so that the maximum discharge flow rate that can be supplied by operating the lever of the liquid supply nozzle is equal to or lower than the constant flow rate .

When the flow rate of the liquid discharged from the liquid supply nozzle is a constant flow rate over a predetermined time, the variable throttle adjusting means of the present invention has a maximum discharge flow rate that can be supplied by operating the lever of the liquid supply nozzle. It is characterized in that the throttle amount of the variable throttle is controlled so as to be a certain flow rate or less.

According to the present invention, in order to control the throttle amount of the variable throttle so that the maximum discharge flow rate that can be supplied by operating the lever of the liquid supply nozzle is equal to or less than the constant flow rate when the constant flow rate is equal to or higher than the predetermined flow rate. It is not necessary to keep the lever operation position constant, and even if the valve opening of the liquid supply nozzle is fully opened, the maximum discharge flow rate is controlled to a constant value, so liquid spills can be prevented. it can.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram schematically showing an embodiment of a liquid supply apparatus according to the present invention. As shown in FIG. 1, an oil supply device (liquid supply device) 11 is installed in a gas supply station, and an oil supply hose 15 connected to an oil supply nozzle (liquid supply nozzle) 13 is pulled out on a side surface of the apparatus body 12. . The fueling nozzle 13 is usually hooked on a nozzle hook 14 provided on the side surface of the apparatus main body 12. For example, when a customer's automobile arrives at a fueling station, the operator removes the fueling nozzle 13 from the nozzle hook 14 and the vehicle The fuel is supplied by being inserted into the fuel filler port 16a of the fuel tank 16.

  The oil supply nozzle 13 is, for example, as described in Patent Document 1 described above, a valve mechanism that adjusts the valve opening degree by rotating the nozzle lever, and a negative pressure generation that generates a negative pressure by the flow rate of the oil liquid. Part, one end is connected to the negative pressure generating part, the other end has an air inlet opening near the tip of the discharge pipe and sucks air (liquid level detection pipe), A liquid level detecting mechanism that performs a valve closing operation by a negative pressure when the air inlet is closed;

  The oil supply nozzle 13 is connected to an oil supply hose 15 at a joint provided on the side surface of the nozzle body, and the oil supply hose 15 is connected to a liquid supply pipe (liquid supply path) 20 in the apparatus main body 12. Yes. The liquid supply line 20 extends to the underground tank 21 and is inserted with a pump 22, a flow meter 24, and a continuously variable solenoid valve (variable throttle) 27.

  The continuously variable electromagnetic valve 27 is opened at a valve opening corresponding to the frequency and duty of the drive signal, and adjusts the flow rate of the oil supplied to the oil supply nozzle 13. The configuration of the continuously variable solenoid valve 27 will be described later.

  Further, an oil supply amount indicator 26 for displaying an oil supply amount obtained by integrating the instantaneous flow rate measured by the flow meter 24 is disposed on the front surface of the apparatus main body 12. The nozzle switch 14 a of the nozzle hook 14, the pump motor 22 a of the pump 22, the flow rate pulse transmitter 24 a of the flow meter 24, and the oil supply amount indicator 26 are connected to the control circuit 25.

  When the oil supply nozzle 13 is removed from the nozzle hook 14 and a signal from the nozzle switch 14a is input, the control circuit 25 starts the pump motor 22a of the pump 22 and pumps up the oil in the underground tank 21. When the flow rate discharged from the nozzle 13 is constant over a predetermined time, the valve opening degree of the continuously variable electromagnetic valve 27 is controlled so that this constant flow rate becomes the maximum discharge flow rate.

  The oil supply nozzle 13 has a configuration in which the valve opening degree of a built-in valve is adjusted according to the operation position of the nozzle lever 13a, and a latch portion that latches the tip of the nozzle lever 13a at an arbitrary operation position. (Not shown) is provided. When the nozzle lever 13 a of the fuel supply nozzle 13 is operated, fuel supply to the fuel tank 16 is started, and a flow rate pulse is output from the flow rate pulse transmitter 24 a of the flow meter 24 to the control circuit 25.

  Then, the control circuit 25 integrates the flow rate pulses output from the flow rate pulse transmitter 24a to display the oil supply amount on the oil supply amount indicator 26, and performs full tank oil supply control or preset oil supply control.

  FIG. 2 is a block diagram showing the configuration of the control circuit 25. As shown in FIG. 2, the control circuit 25 includes a CPU 30 that executes an oil supply control process to be described later, a RAM (storage means) 31 that stores each data, a ROM 32 that stores a preset oil supply control program, and a signal And an I / O interface 33 for performing input / output. The RAM 31 maintains a storage state by supplying power from the battery 34. The I / O interface 33 is connected to the nozzle switch 14a of the nozzle hook 14, the flow rate pulse transmitter 24a of the flow meter 24, the display 26, the continuously variable solenoid valve 27, and the preset switch 35. .

  In this embodiment, the ROM 32 functions as a storage unit that stores in advance reference data representing the relationship between the discharge amount with respect to the voltage application time to the continuously variable solenoid valve 27. The ROM 32 reads the flow rate measurement value of the flow meter 24, and when this flow rate measurement value is substantially constant until a predetermined time elapses, the continuously variable solenoid valve is set so that this constant value becomes the maximum discharge flow rate. A control program (variable aperture adjusting means) for controlling the aperture amount of 27 is stored. The RAM 31 functions as a storage unit that stores the flow rate measurement value in time series.

  Therefore, the control circuit 25 obtains the characteristic of the continuously variable solenoid valve 27 (relation with the discharge amount with respect to the voltage application time) when refueling, and then obtains a difference from the reference data stored in advance as a correction value. Based on the correction value, the duty is corrected so that the relationship between the discharge amount of the continuously variable solenoid valve 27 and the valve opening becomes the reference characteristic, and a drive signal is supplied to the continuously variable solenoid valve 27.

  The preset switch 35 is installed, for example, in the vicinity of the nozzle hook 14 and is operated only when preset oiling is performed. Therefore, if the preset value is input by operating the preset switch 35 before starting refueling, the preset refueling mode is set.

  FIG. 3 is a longitudinal sectional view showing the configuration of the continuously variable solenoid valve 27. As shown in FIG. 3, the continuously variable electromagnetic valve 27 includes a valve body 40, a valve body 42 that is attached to and detached from a valve seat 41 of the valve body 40, and a solenoid 43 into which the valve shaft 42 a of the valve body 42 is inserted. The coil spring 44 biases the valve shaft 42a of the valve body 42 in the valve closing direction. Further, the valve body 40 includes an inlet 45 through which the oil liquid flows and an outlet 46 through which the oil liquid that has passed through the opening 41 a of the valve seat 41 is discharged to the oil supply nozzle 13. The valve body 42 is urged to a valve closing position that abuts on the valve seat 41 by the spring force of the coil spring 44, and is pressed so as not to open even when oil pressure acts.

  Further, when the solenoid 43 is excited by a drive signal from the control circuit 25, it generates an electromagnetic force in a direction that attracts the valve shaft 42a of the valve body 42 upward, and resists the valve body 42 against the spring force of the coil spring 44. To open the valve. The continuously variable solenoid valve 27 applies a solenoid force in the valve opening direction to the valve body 42 according to the duty ratio per cycle of the drive signal input to the solenoid 43, thereby obtaining a discharge amount of a desired flow rate. The valve opening degree of the valve body 42 is adjusted so that Therefore, the valve body 42 is held in a slightly vibrated state at a valve opening position where the periodic electromagnetic force of a certain frequency of the solenoid 43 and the spring force of the coil spring 44 are balanced.

  As will be described later, the control circuit 25 opens the continuously variable solenoid valve 27 at a low flow rate at the beginning of refueling, measures the discharge amount with respect to the valve opening determined by the duty of the drive signal, and communicates with the continuously variable solenoid valve 27. Seeking a relationship. Then, the control circuit 25 corrects the duty of the drive signal so that the characteristic of the continuously variable solenoid valve 27 discharges the reference flow rate with respect to the reference valve opening.

  4A to 4C are diagrams showing changes (drive signals) in voltage applied to the solenoid 43 of the continuously variable solenoid valve 27 according to the duty values (30%, 50%, 100%). . As shown in FIG. 4A, when the duty is set to 30%, the ON time A per cycle of the signal time B is A = B × 30/100. As shown in FIG. 4B, when the duty is set to 50%, the ON time A per cycle of the signal time B is A = B × 50/100. Further, as shown in FIG. 4C, when the duty is set to 100%, the ON time A per cycle of the signal time B is A = B × 100/100. Therefore, as the duty value of the drive signal applied to the solenoid 43 of the continuously variable solenoid valve 27 is increased, the valve opening of the continuously variable solenoid valve 27 is increased, and the valve element 42 is fully opened at a duty of 100%.

  FIG. 5 is a system diagram of the system installed at the gas station. As shown in FIG. 5, a plurality of fueling devices 11 are installed in the fueling station of the present embodiment, and each fueling device 11 is connected via an SS-LAN 50 and a management computer 40 that manages the entire fueling station. It is connected so that it can communicate. Each oil supply device 11 is a self-oiling type measuring machine, and the customer can operate the oil supply nozzle 13 to supply oil.

  Here, the control process during refueling executed by the control circuit 25 will be described with reference to the flowcharts of FIGS. 6A and 6B. As shown in FIG. 6A, the control circuit 25 clears each variable stored in the RAM 31 in S11. In the next S12, the maximum discharge flow rate b that can be discharged from the oil supply nozzle 13 is set to the maximum supply flow rate c (for example, 100 L / min) that can be supplied by the liquid supply pipe 20 and the pump 22 of the oil supply device 11 (b). = C).

  Subsequently, in S13, it is checked whether or not the fueling nozzle 13 has been removed from the nozzle hook 14. In S13, if the nozzle switch 14a is off, it is determined that the fueling nozzle 13 has been removed from the nozzle hook 14, and the process proceeds to S14. In S14, the pump motor 22a is driven, and the solenoid 43 of the continuously variable solenoid valve 27 is energized to drive the valve element 42 in the valve opening direction. At that time, the duty d of the solenoid valve signal output to the continuously variable solenoid valve 27 is set to 100% (see FIG. 4C).

  In next S15, it is checked whether or not the fueling nozzle 13 is inserted into the fueling port (not shown) of the automobile and fueling is started. In S15, when a flow rate pulse is output from the flow meter 24, it is determined that refueling has started, and the flow proceeds to S16, where the flow rate pulse is integrated to measure the current discharge flow rate a (instantaneous flow rate). It is stored in the RAM 31 (flow rate integrating means). In S17, the total flow amount (integrated flow rate) is calculated by integrating the discharge flow rate a and stored in the RAM 31.

  In next S18, it is checked whether or not the maximum discharge amount has been set (whether or not the flag f is 1). In S18, when the maximum discharge amount is not set (flag f = 0), the process proceeds to S19, whether or not the discharge flow rate a is substantially constant for a predetermined time (for example, 3 seconds), that is, the discharge flow rate. It is checked whether or not a is a stable flow rate (determination means). In S19, when the discharge flow rate a is substantially constant for a predetermined time, the process proceeds to S20, and it is checked whether or not the discharge flow rate a is equal to or less than a predetermined minimum flow rate (15 liters / minute). . This minimum flow rate generates a negative pressure used to operate a well-known automatic valve closing mechanism (for example, see Japanese Patent Laid-Open No. 2005-289448 for details of the automatic valve closing mechanism) provided in the fuel supply nozzle 13. The flow rate required to generate a negative pressure of a predetermined magnitude or more in the negative pressure generator for generating a negative pressure of a predetermined magnitude or less when the flow rate is below this minimum flow rate, and an automatic valve closing mechanism Will not work. Therefore, in S20, when the discharge flow rate a is equal to or greater than the minimum flow rate (15 liters / minute), the automatic valve closing mechanism can be operated, so the process proceeds to S21 shown in FIG. 6B and a is set to the maximum discharge flow rate b. (B = a), the process proceeds to S22 described later.

  Further, when the maximum discharge amount is set at S18 (flag f = 1), or when the discharge flow rate a is not substantially constant for a predetermined time (the flow rate is not stable) at S19, or the discharge is performed at S20. When the flow rate a is less than the minimum flow rate (15 liters / minute), the process proceeds to S24 described later.

  Next, in S22, in order to indicate that a is set to the maximum discharge flow rate b in S21 described above, 1 is set in the flag f (f = 1), and in S23, the buzzer indicates that the maximum discharge flow rate has been set. Notify by sound. Then, it progresses to S24 and it is checked whether the present discharge flow rate a exceeds the maximum discharge flow rate b. In S24, when the current discharge flow rate a exceeds the maximum discharge flow rate b, the process proceeds to S25, and the duty of the solenoid valve signal is lowered by one step (for example, 10%) (variable throttle adjusting means, control means), which will be described later. The process proceeds to S26. In S25, by reducing the duty, for example, as shown in FIG. 4 (A) or 4 (B), the on-time A of the drive signal applied to the unauthorized solenoid valve 27 decreases, and the current discharge flow rate a Decrease. In S24, when the current discharge flow rate a is equal to or less than the maximum discharge flow rate b, it is not necessary to adjust the discharge flow rate a. Therefore, the process of S25 is omitted, and the process proceeds to S26. Maintain signal duty.

  Next, in S26, it is checked whether or not the discharge flow rate a is zero. In S26, when the discharge flow rate a is zero, the process proceeds to S27, where the maximum discharge flow rate b is canceled (the maximum discharge flow rate b is set to the aforementioned maximum supply flow rate c (for example, 100 L / min)) and the solenoid valve signal. And 0 indicating that the maximum discharge flow rate b is not limited is set in the flag f (f = 0). In S26, when the discharge flow rate a is not zero, the process of S27 is omitted and the duty of the electromagnetic valve signal is maintained.

  In S28, it is checked whether or not refueling is completed. In S28, it is determined that the refueling is completed by stopping the flow rate pulse from the flow meter 24, returning the refueling nozzle 13 to the nozzle hook 14 and turning on the nozzle switch 14a. And in S28, when refueling has not ended, the process returns to S16, and the processes after S16 are performed.

  If 1 indicating that the maximum discharge flow rate b is limited is set in the flag f in S22 (f = 1), the maximum discharge amount setting process in S19 to S23 is omitted in S18.

  In this way, when the nozzle lever of the oil supply nozzle 13 is operated and the discharge flow rate is continuously reduced for a predetermined time to supply the oil (when the oil supply is performed at a stable discharge flow rate), the setting is made in S21. After the maximum discharge flow rate is adjusted, the valve opening of the continuously variable solenoid valve 27 is adjusted so that the flow rate (discharge flow rate when operating the nozzle lever to supply oil) becomes the maximum discharge flow rate. Does not need to hold the nozzle lever operating position so that the nozzle lever of the fuel filler nozzle 13 is squeezed from the fuel filler port so that the discharge flow rate from the fuel nozzle 13 is less than the maximum discharge flow rate a. Thus, refueling can be performed.

  Next, a first modification of the control process will be described. 7A and 7B are flowcharts showing a first modification of the control process executed by the control circuit 25. As shown in FIG. 7A, the control circuit 25 clears each variable stored in the RAM 31 in S31. In the next S32, the maximum discharge flow rate b that can be discharged from the oil supply nozzle 13 is set to the maximum supply flow rate c that can be supplied by the liquid supply pipe 20 and the pump 22 of the oil supply device 11 (b = c).

  Subsequently, in S33, it is checked whether or not the fuel supply nozzle 13 has been removed from the nozzle hook 14. In S33, if the nozzle switch 14a is off, it is determined that the fueling nozzle 13 has been removed from the nozzle hook 14, and the process proceeds to S34. In S34, it is checked whether or not a refueling permission signal has been received from the management computer 40 of the refueling station.

  In S34, when a refueling permission signal is received from the management computer 40, the process proceeds to S35, and it is checked whether or not there is a setting input of the maximum discharge flow rate a from the management computer 40. In S35, when there is a setting input of the maximum discharge flow rate a from the management computer 40, the process proceeds to S36, where a is set to the maximum discharge flow rate b (setting means). In S35, when there is no setting input of the maximum discharge flow rate a from the management computer 40, the process of S36 is omitted and the maximum discharge flow rate b is not changed.

  In the next S37, the duty d of the solenoid valve signal at the maximum discharge flow rate b is determined from the data table of the maximum discharge flow rate when the nozzle lever is fully opened with respect to the duty of the solenoid valve signal (variable throttle adjusting means).

  7B, the pump motor 22a is driven. In S39, the solenoid valve signal output to the continuously variable solenoid valve 27 is converted to the solenoid of the continuously variable solenoid valve 27 at the duty d determined in S37. 43 is supplied to drive the valve element 42 in the valve opening direction.

  In S40, when a flow rate pulse is output from the flow meter 24, the flow rate pulse is integrated to measure the current discharge flow rate a (instantaneous flow rate), and the discharge flow rate a is integrated to obtain the total oil supply amount (integrated flow rate). Is calculated and stored in the RAM 31.

  In the next S41, it is checked whether or not there is an instruction to cancel the maximum discharge restriction amount from the management computer 40. In S41, when there is an instruction to release the maximum discharge restriction amount from the management computer 40, the flow control by the continuously variable solenoid valve 27 is not performed, so the process proceeds to S42, and the duty of the solenoid valve signal is set to 100% and fueling is performed. (See FIG. 4C).

  In S41, when there is no instruction for releasing the maximum discharge restriction amount from the management computer 40, the flow control by the continuously variable solenoid valve 27 is maintained.

  In next S43, it is checked whether or not refueling has been completed. In S43, when the flow rate pulse is stopped from the flow meter 24, the fuel supply nozzle 13 is returned to the nozzle hook 14, and the nozzle switch 14a is turned on, it is determined that the fuel supply is finished. In S28, when refueling is not completed, the process returns to S40, and the processes after S40 are repeated.

  Thus, since the maximum opening flow rate of the continuously variable solenoid valve 27 is adjusted to be supplied by the setting input of the maximum discharge flow rate a from the management computer 40, the nozzle lever of the fuel supply nozzle 13 is adjusted. The flow rate is controlled so that the maximum discharge flow rate from the fuel supply nozzle 13 becomes the desired discharge flow rate a without adjusting the operation position of the nozzle lever so that no spilling occurs from the oil supply port.

  Next, control processing executed by the management computer 40 will be described. 8A and 8B are flowcharts showing control processing executed by the management computer 40. FIG. As shown in FIG. 8A, the management computer 40 clears each variable in S51. In next S52, it is checked whether or not a nozzle removal signal from the fueling device 11 has been received. In S52, when the operator picks up the fueling nozzle 13 from the nozzle hook 14 and receives the nozzle removal signal from the fueling device 11 with the nozzle switch 14a turned off, the process proceeds to S53.

  In S53, it is checked whether or not a refueling permission from the management computer 40 can be issued. In S53, when the refueling permission from the management computer 40 can be issued, the process proceeds to S54, and the normal refueling permission button (not shown) and the maximum discharge flow rate are permitted to the target refueling device 11. To enable a maximum discharge flow rate setting permission button (not shown).

  Subsequently, in S55, it is checked whether or not the normal refueling permission button has been operated. If the normal refueling permission button is not turned on in S55, the process proceeds to S56 to check whether the maximum discharge flow rate setting permission button has been turned on. If the maximum discharge flow rate setting permission button is not turned on in S56, the process proceeds to S57, in which it is checked whether a nozzle application signal has been received from the fueling device 11. In S57, when the nozzle application signal is received from the fuel supply device 11, the fuel supply nozzle 13 is returned to the nozzle application 14, and thus the current control process is terminated. In S57, when the nozzle application signal is not received from the fueling device 11, the process returns to S55, and the processes of S55 to S57 are repeated.

  If the normal refueling permission button is turned on in S55, the process proceeds to S58, where a refueling permission signal is issued (transmitted) to the target fueling device 11. In S59, the fact that there is no restriction on the maximum discharge flow rate is issued (transmitted) to the target fueling device 11.

  In S56, when the maximum discharge flow rate setting permission button is turned on, the process proceeds to S60 shown in FIG. 8B and issues (transmits) a fueling permission signal to the target fueling device 11. And in S61, it issues (transmits) that there is no restriction | limiting of the maximum discharge flow rate a with respect to the said target oil supply apparatus 11. FIG.

  Subsequently, in S62, it is checked whether or not a release button (not shown) for limiting the maximum discharge flow rate is turned on. In S62, when a release button (not shown) for maximum discharge flow rate restriction is turned on, the process proceeds to S63, and a release of the maximum discharge flow rate restriction is issued (transmitted) to the target fueling device 11. To do. In S62, when the release button (not shown) for limiting the maximum discharge flow rate is not turned on, the process of S63 is omitted.

  In next S64, it is checked whether or not a refueling end signal has been received from the fueling device 11. In S64, when the refueling end signal is not received from the fueling device 11, the process returns to S62 and the processes of S62 to S64 are repeated. In S64, when the refueling end signal is received from the refueling device 11, the current process is terminated.

  In this way, the management computer 40 transmits and receives signals to and from the plurality of fueling devices 11 installed in the fueling station, and when the fueling permission button is turned on, the fueling permission signal is sent to the fueling device 11. Is issued (transmitted) so that the fuel supply device 11 can supply fuel, and the maximum discharge flow rate setting permission button is turned on to issue (transmit) a maximum discharge flow rate setting permission signal to the fuel supply device 11. . Therefore, the control circuit 25 of the fueling apparatus 11 that has received a signal from the management computer 40 can perform fueling and can set a maximum discharge flow rate.

  In the above embodiment, the oil supply device is illustrated as an example of the liquid supply device for supplying a liquid such as gasoline. However, the present invention is not limited to this, and liquids other than the fuel fed by the pump (for example, water or chemicals) Of course, the present invention can also be applied to an apparatus for supplying a tank to a tank.

  In the above-described embodiment, the description has been given by taking the fuel supply device for supplying fuel such as gasoline and light oil as an example. However, the present invention is not limited thereto, and fuel other than gasoline and light oil (for example, liquid such as organic hydride containing hydrogen) Of course, the present invention can also be applied to an apparatus for supplying a tank.

It is a block diagram which shows typically one Example of the liquid supply apparatus by this invention. 2 is a block diagram showing a configuration of a control circuit 25. FIG. 3 is a longitudinal sectional view showing the configuration of a continuously variable electromagnetic valve 27. FIG. It is a figure which shows the voltage signal applied to the solenoid 43 of the continuously variable solenoid valve 27 according to the value (30%, 50%, 100%) of a duty. It is a system distribution diagram installed in a gas station. 3 is a flowchart for illustrating a control process during refueling executed by a control circuit 25. It is a flowchart for demonstrating the control process at the time of the fuel supply which the control circuit 25 performs following the process shown to FIG. 6A. 10 is a flowchart showing a first modification of the control process executed by the control circuit 25. It is a flowchart which shows the modification 1 of the control process which the control circuit 25 performs following the process shown to FIG. 7A. It is a flowchart which shows the control processing which the management computer 40 performs. It is a flowchart which shows the control process which the management computer 40 performs following the process shown to FIG. 8A.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Oil supply apparatus 12 Apparatus main body 13 Oil supply nozzle 14 Nozzle hook 15 Oil supply hose 16 Fuel tank 20 Liquid supply line 22 Pump 24 Flowmeter 25 Control circuit 27 Stepless solenoid valve 30 CPU
31 RAM
32 ROM

Claims (3)

A lever for adjusting the flow rate of the fluid by manual operation, the liquid supply nozzle and a valve mechanism for regulating the flow rate of the liquid supply fluid to the supply tank by the operation of the lever,
A liquid supply path for supplying liquid to the liquid supply nozzle;
A pump for supplying liquid to the liquid supply nozzle via the liquid supply path;
A flow meter for measuring a flow rate of the liquid flowing through the liquid supply path;
Flow rate integrating means for calculating the flow rate by integrating the flow rate pulses output from the flow meter;
A variable throttle provided in the liquid supply path for controlling the flow rate of the liquid discharged from the liquid supply nozzle;
In a liquid supply apparatus having
When the flow rate measured by the flow meter is a constant flow rate, the aperture of the diaphragm the variable so that the maximum discharge flow rate that can be supplied is the constant flow rate below the operation of the lever of the liquid supply nozzle the result is provided a variable throttle adjusting means for controlling,
The variable aperture adjustment means includes
When the constant flow rate is equal to or higher than a predetermined flow rate, the throttle amount of the variable throttle is controlled so that a maximum discharge flow rate that can be supplied by operating a lever of the liquid supply nozzle is equal to or less than the constant flow rate. Liquid supply device. The liquid supply nozzle is
A discharge pipe through which liquid is discharged;
A negative pressure generating section that generates a negative pressure in the liquid supply nozzle by the flow rate of the liquid; and an air introduction port having one end communicating with the negative pressure generating section and the other end opening near the tip of the discharge pipe. A suction pipe for sucking air, and a liquid level detection mechanism for closing the valve mechanism by negative pressure when the air inlet is closed due to a rise in liquid level due to liquid supply;
With
The variable aperture adjustment means includes
The predetermined flow rate is a predetermined flow rate required for the negative pressure generating unit to generate a negative pressure greater than a predetermined magnitude required for closing the valve mechanism by the liquid level detection mechanism. 2. The liquid supply apparatus according to claim 1, wherein when the flow rate is equal to or higher than the flow rate, the throttle amount of the variable throttle is controlled so that a maximum discharge flow rate that can be supplied by operating a lever of the liquid supply nozzle is equal to or less than the predetermined flow rate. When the flow rate of the liquid discharged from the liquid supply nozzle is a constant flow rate over a predetermined time, the variable throttle adjusting means has a maximum discharge flow rate that can be supplied by operating a lever of the liquid supply nozzle. The liquid supply apparatus according to claim 1, wherein the diaphragm amount of the variable diaphragm is controlled so as to satisfy the following conditions.

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