JP2544312B2 - Refueling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device used in a gas filling station, and more particularly to an oil supply device suitable for use in the case of preventing an oil of a wrong liquid type from being supplied to a fuel tank of a vehicle or the like.

[0002]

2. Description of the Related Art Generally, a refueling device used in a refueling station is designed so that a refueling pump is automatically driven when a refueling worker removes a refueling nozzle attached to the refueling device. It is possible to refuel by inserting the refueling nozzle into the refueling port of the vehicle. In this case, the type of liquid that can be refueled is limited to the oil in the underground tank pumped up by the refueling pump of the refueling device, and in order to refuel the oil required by the vehicle, It is necessary to use a refueling nozzle for oils pumped from an underground tank of the same liquid type.

By the way, an erroneous oil supply prevention device is known as a device for preventing troubles such as a refueling worker accidentally refueling a vehicle equipped with a gasoline engine with light oil or a vehicle equipped with a diesel engine with gasoline. ing. As a device provided with this type of device in a refueling device, as previously filed by the applicant, in order to prevent the refueling of oil of the wrong liquid type to a fuel tank of a vehicle or the like, fuel is supplied prior to refueling. There is an oil supply device capable of surely detecting the type of oil from the vapor concentration in the tank (Japanese Patent Application No. 62-75471).

In this erroneous oil supply prevention device, a detection element whose resistance value changes due to oil vapor is provided in the oil supply nozzle, and the detection element has a resistance value corresponding to a predetermined oil type in advance. Determination of the oil type based on whether or not the resistance value exceeds a predetermined resistance value or whether or not the resistance value of the detection element is within a predetermined resistance value range corresponding to the predetermined oil type Means is provided, and only when the type of oil to be refueled matches the type of oil in the fuel tank, the determination means outputs a drive signal to the pump motor or outputs a valve opening signal to a solenoid valve provided in the pipe. It is configured to output and start actual refueling.

[0005]

However, in the above-mentioned prior art, the detection time with respect to the detection resistance of the detection element has a characteristic as shown in FIG. Therefore, in order to reliably determine gasoline and light oil, it is necessary to ensure that both oil vapors have sufficiently penetrated the detection element and the output resistance value of the detection element is stable enough to be determined. It takes a sufficient time, for example 10 to 20 seconds. As a result, it takes a long time to determine the type of oil before the actual refueling is started, which not only takes time for the refueling work but also during this period, the refueling device is apparently kept in a state in which the actual refueling is not performed, so that the erroneous operation is prevented. It had the drawback of being easy to invite.

Therefore, it is not known how much time has passed since the end of the previous refueling work until the detection element reaches a stable state, and when the oil type determination is started before the next refueling work before the stable state is reached. In some cases, the resistance value at the time of the previous determination is reflected in the result of the next determination, resulting in an erroneous determination, which may cause the fuel tank of the vehicle to be refilled with the wrong oil type.

The present invention has been made to improve the above-mentioned drawbacks of the prior art. In order to prevent the detection element from erroneously detecting due to the oil vapor at the time of the previous oil type discrimination. An object of the present invention is to provide a refueling device that informs whether or not the detection element is in a detectable state before starting the oil type discrimination.

Another object of the present invention is to provide, when the detection element is in a state in which the oil type cannot be discriminated before starting the oil type discrimination,
An object of the present invention is to provide an oil supply device in which oil type discrimination is not performed.

[0009]

In order to achieve the above object, an oil supply device according to the present invention includes a pipe having one end connected to a tank, a pump provided in the middle of the pipe and driven by a pump motor and an oil supply. A flow meter for measuring the amount, a refueling nozzle that is provided on the other end side of the pipe via a hose, and discharges oils sent from the pump to a fuel tank,
A detection element whose electric output value changes according to the vapor concentration of oils in the fuel tank, and an output value of the detection element and an output value corresponding to a preset predetermined oil type are compared, and both are compatible. When it does, it is provided with a discriminating means for outputting a drive signal to the pump motor or outputting a valve opening signal to an electromagnetic valve provided in the middle of the pipe.

A feature of the configuration adopted by the invention according to claim 1 is that a discriminable reference value smaller than the output value of the detection element and the output value corresponding to the predetermined oil type after the discrimination operation by the discriminating means is completed. And a detection possibility confirmation means for confirming whether or not the oil type can be discriminated by the detection element, and notifying whether or not the discrimination operation by the discrimination means is possible based on the output of the confirmation signal from the detection feasibility confirmation means. And an informing means to operate.

Further, the feature of the configuration adopted by the invention according to claim 2 is that the discriminable reference value smaller than the output value of the detection element and the output value corresponding to the predetermined oil type after the discrimination operation by the discriminating means is completed. And a detection possibility confirmation means for confirming whether or not the oil type can be discriminated by the detection element, and when the detection possibility confirmation means outputs an undetectable confirmation signal, the discrimination means discriminates the oil type. This is because a discrimination prohibition unit that prohibits the operation is provided.

[0012]

According to the first aspect of the present invention, the detectability confirmation means compares the output value of the detection element with a discriminable reference value smaller than the output value corresponding to the predetermined oil type after the discriminating operation by the discriminating means is completed. Check whether the oil type can be discriminated.If the output value is smaller than the discriminable reference value, it is judged that discrimination is possible.
When the output value is larger than the discriminable reference value, it is determined that the oil type cannot be discriminated. Based on the confirmation signal from the detection possibility determination means, the notification means notifies whether or not the oil type determination operation by the determination means is possible before the next oil type determination is started, and the detection element can detect the oil type. Prevents starting the actual refueling work before it reaches a stable state.

According to the second aspect of the invention, the discrimination prohibiting means outputs the oil type discriminating operation by the discriminating means when the confirmation signal for discriminating the oil type discrimination by the detection possibility discriminating means is outputted. This is prohibited, and the next actual lubrication work is prohibited until the detection element becomes a state where the oil type can be detected.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the case where the oil supply apparatus of the present invention is applied to a fixed type oil supply apparatus will be described in detail based on the embodiments shown in the drawings.

FIG. 1 is an overall configuration diagram of a fueling apparatus used in the present embodiment. In FIG. 1, 1 is a weighing machine provided on the premises of a gas station, and 2 is a weighing machine. With piping,
A pump 4 driven by a pump motor 3 and a flow meter 5 are provided in the middle of the pipe 2, and a flow rate pulse transmitter 6 that transmits a flow rate pulse proportional to the flow rate is attached to the flow meter 5. Further, on the front surface of the weighing machine 1, a refueling amount display 7 for displaying the total refueling amount is provided.

Reference numeral 8 is a hose whose proximal end is connected to the pipe 2, 9 is a fueling nozzle provided at the tip of the hose 8, and the fueling nozzle 9 is opened to discharge the oil liquid to the fuel tank. You can do it. Reference numeral 10 denotes a nozzle hook provided on the side surface of the weighing machine 1, and the oil supply nozzle 9 is attached to and detached from the nozzle hook 10. The nozzle hook 10 is a nozzle that opens and closes in conjunction with the attachment and detachment of the oil supply nozzle 9. A switch 11 is provided and outputs a nozzle switch signal indicating that refueling work is being performed during closing (ON).

An oil vapor detection element 12 is provided at the tip of the discharge pipe 9a of the oil supply nozzle 9 so as to be surrounded by a collecting cylinder 13, and detects oil vapor from the vapor concentration of oils in the fuel tank. As shown in FIG. 3, reference numeral 12 denotes a resistor 12a obtained by kneading a synthetic resin (Teflon) and a conductor (carbon and other inorganic substances), and a water-repellent resin made of a synthetic resin (Teflon) and covering the resistor 12a. 12b
And a weak current is applied to the resistor 12a. The water-repellent resin 12b is not compatible with water vapor or the like, is impermeable to water droplets, and allows only the vapor of oils to pass through. The vapors of oils that have passed through the resin 12b form the resistance 12a. The reversible affinity with Teflon changes the resistance value of the resistor 12a.

In the figure, 14 is the discharge pipe 9 of the oil supply nozzle 9.
The insertion sensor 14 is provided at the tip of a. The insertion sensor 14 is configured as an optical sensor including, for example, a light emitting element and a light receiving element, and detects the insertion state based on the difference in brightness between the outside air and the fuel tank. An ultrasonic sensor may be used as the insertion sensor 14.

Further, reference numeral 15 is a control device provided in the weighing machine 1. The control device 15 has an analog-digital conversion circuit 16 (hereinafter referred to as an A / D circuit 16), a control circuit 17 including a CPU, and a ROM. , A RAM and the like, and a sampling timer 19. The input side of the control circuit 17 is connected to the oil vapor detection element 12 via the A / D circuit 16, the nozzle switch 11 and the insertion sensor 14, and the output side is connected to the pump motor control circuit 20. In addition to being connected to the pump motor 3, the alarm device 21 and the oil type discriminating display 22 are also connected.

Here, the A / D circuit 16 converts an analog electric output value corresponding to the concentration of the oil vapor output from the oil vapor detection element 12 into a digital value. The sampling timer 19 has a time (for example, 1 second) shorter than the time for the oil vapor detection element 12 to fully infiltrate the oil vapor.
A sampling pulse for instructing discrimination work is output at each interval. The storage circuit 18 is provided with a storage area 23 as shown in FIG. 5 for determining the oil type, and stores the program shown in FIG.

Describing the storage area 23, 24 is a previous resistance value storage area, and the previous resistance value storage area 24 is supplied with the previous sampling pulse when the sampling pulse of this time is supplied from the sampling timer 19. In this area, the resistance value R of the oil vapor detection element 12 calculated by the control circuit 17 at that time is sequentially updated and stored as the previous resistance value R _b .

An oil type discrimination flag area 25 stores therein a flag "ON" indicating that the oil type can be discriminated and a flag "OFF" indicating that the oil type cannot be discriminated. Is. Since the degree of change in the resistance value of the oil vapor detection element 12 depends on the density of the surrounding vapor concentration, when the oil vapor disappears from the vicinity of the oil vapor detection element 12, the original resistance value (initial value 12 KΩ in FIG. 7) Return to. Therefore, in the oil type discrimination flag area 25, the vapor of oil (gasoline) has already sufficiently penetrated into the oil vapor detection element 12 before the oil type is discriminated, and the resistance value of the oil vapor detection element 12 is increased. Is stored in the initial state before discrimination, that is, whether the oil vapor detection element 12 is in a state capable of discriminating oils. Then, "ON" and "OFF" of the oil type discrimination flag area 25 become confirmation signals in this embodiment.

Reference numeral 26 denotes a discriminable / non-discriminating resistance value storage area.
The oil vapor detection element 12 can discriminate oils in the storage area 26.
It is a standard for confirming whether or not
Resistance value R₀The (determinable reference value) is stored. this
Resistance value R ₀ From the vicinity of the oil vapor detection element 12
Greater than the original initial resistance value, which was stable without steam
(For example, 15 KΩ).

27 is an oil vapor detection element 1 for discriminating the oil type.
Resistance value change data R _{bh which is the} criterion for the change in resistance value 2
Is a reference change rate selection table stored corresponding to the previous resistance value R _b . For example, when the previous resistance value R _b of the oil vapor detection element 12 is now 13 KΩ, the oil vapor detection element 1
In order to determine that 2 is in the gasoline atmosphere, the condition is that there is a change in the resistance value of 2 KΩ or more when the sampling pulse is input this time from the sampling timer 19, and the resistance value change data R _bh is It is preset and stored based on the characteristic diagram of FIG.

Further, the above-mentioned alarm device 21 gives an alarm by a buzzer, a lamp or the like when the type of oil to be refueled in the fuel tank is not suitable, and the oil type discriminating indicator 22 is capable of discriminating the type of oil. It indicates whether it is possible or impossible by using a lamp or a liquid crystal display. The alarm device 21 and the oil type discriminating indicator 22 are specific examples of informing means for informing whether or not the oil type discriminating operation is possible.

The present embodiment is constructed in this way, and its operation will be described next with reference to FIG. Note that "S1" to "S" for each of the following steps S1 to S25.
25 ”.

(1) The state in which the oil supply nozzle 9 is hung on the nozzle hook 10 of the oil supply device, or the nozzle hook 10
Although not yet inserted into the filler opening (S1, S2, S20 to S25).

In this state, the nozzle switch 11 is OF
F, or OF in which the insertion sensor 14 is in the insertion non-detection state
Since it is in the F state (determined as "NO" in S1 and S2), the control circuit 17 first monitors and detects whether or not a sampling pulse is input from the sampling timer 19. When the sampling pulse is not output, S1-S
The loop of 20-S1 or S1-S2-S20-S1 is repeatedly executed.

Here, when the sampling pulse is input, the control circuit 17 takes in the data supplied from the oil vapor detection element 12 via the A / D circuit 16, and determines the detection resistance value R of the oil vapor detection element 12. After the calculation, the calculated resistance value R is used to determine whether or not the storage area 24 can be discriminated.
6 is compared with the discriminability resistance value R ₀ stored in S6 (S
22). When the resistance value R is equal to or larger than the resistance value R ₀ , it is determined that the oil type cannot be discriminated, and the above S1-S2-S20-
The processing of S21-S22 is repeated. On the other hand, when the resistance value R is smaller than the resistance value R ₀ , it is confirmed that the oil type can be discriminated, and the resistance value R calculated this time is determined.
Is written and updated as the previous resistance value R _{b in} the previous resistance value storage area 24 of the storage area 23 (S23), and the flag of the oil type determination flag area 25 is turned ON to make the oil type discriminable state (S24). The oil type discriminable indicator 22 provided at is lighted to inform that the refueling device is in the oil type discriminating state and the refueling work can be accepted (S).
25).

Thus, step S22 is for comparing whether or not the detected resistance value R is larger than the discriminability resistance value R _{0, and} whether or not the oil type can be detected by the oil vapor detection element 12 in this step S22. A detection propriety confirmation means for confirming whether or not it is configured.

(2) When the refueling nozzle 9 is removed from the nozzle hook 10 and inserted into the refueling port.

When the refueling nozzle 9 is removed from the nozzle hook 10 and inserted into the refueling port (S1, S2), the control circuit 1
In step S7, the oil type determination flag area 25 of the storage area 23 is turned on, and it is determined whether the oil vapor detection element 12 has returned to the oil type discriminable state (S3). Now
If it is OFF in step S3, the loop of S2-S3 is repeated, and the oil vapor detection element 1 described in (1) above is repeated.
The configuration is such that the operation cannot proceed to the next work until it is confirmed that No. 2 has returned to the oil type discriminating state, that is, the oil type discriminating operation is prohibited. In this state, the refueling nozzle 9
Is pulled out from the fuel filler, S2-S20-S
21-S22-S1 is returned to.

Thus, confirming that the oil type determination flag area 25 is OFF in step S3 means that the oil type determination flag is not ON in step S24. Therefore, in this step S3,
Preventing the process from proceeding to step S4 and executing step S1 described later.
The oil type discrimination operation by 0 is prohibited, so that step S11
This means that the actual refueling is prevented from being performed, and constitutes the discrimination prohibiting means according to the present invention.

On the other hand, in S3, the oil type discrimination flag is turned on.
When the oil vapor detection element 12 is in a state in which the oil type can be discriminated, it is determined whether or not a sampling pulse is supplied from the sampling timer 19 (S).
4). Then, while the sampling pulse is not supplied, the loop shown by S4-S2-S3 is repeated. On the other hand, when the sampling pulse is supplied, the oil vapor detection element 12
The data is fetched from A through the A / D circuit 16 and the resistance value R of the oil vapor detection element 12 is calculated (S5).

Next, the control circuit 17 controls the previous resistance value R stored in the previous resistance value storage area 24 of the storage area 23.
_b is read, and the change rate R _h is calculated from the resistance value R obtained by sampling this time and the previous resistance value R _b as the difference (R _h = R−R _b ) between the two resistance values (S6). , The corresponding reference change rate R _bh is selected from the reference change rate selection table 27 in the storage area 23 based on the previous resistance value R _b (S7). Now, suppose that the detected resistance value R = 14.5KΩ,
If the previous resistance value R _b = 12.1 KΩ, the rate of change R _h = 2.4 K
Ω [KΩ / sec] and standard change rate 2 KΩ [KΩ / sec].

Next, in S8, the value of the previous resistance value R is written and updated in the previous resistance value storage area 24 as the previous resistance value R _b , and in S9, the above-mentioned change rate R _h and the reference change rate R _bh are calculated. Is calculated, and then it is determined in S10 whether ΔR> 0, that is, whether the oil type is suitable. And
For example, in the case of the above example, the rate of change R _h is larger than the reference rate of change R _bh , so both the oil type of the fuel tank and the oil type of the refueling nozzle 9 are gasoline, and it is determined that the oil type is suitable. Then, the drive instruction signal is output from the control circuit 17 to the pump motor control circuit 20 (S10) (S11), and the pump motor control circuit 20 energizes the pump motor 3.

As a result, when the valve opening operation of the refueling nozzle 9 is performed, the oil liquid in the underground tank is discharged from the refueling nozzle 9 through the pipe 2, the pump 4, the flow meter 5, and the hose 8 to the refueling tank. Can refuel.

Thus, step S10 is a specific example of the determination means for outputting the drive instruction signal for the pump motor 3 when the type of oil in the fuel tank matches the type of oil to be supplied.

On the other hand, when ΔR <0 is determined in S10, the oil type of the fuel tank and the oil type of the refueling nozzle 9 are non-gasoline (light oil) and gasoline, and both oil types are not compatible. At this time, the control circuit 17 outputs a notification signal to the alarm device 21 to notify the operator of the difference in oil type (S16). As a result, the operator recognizes that the oil type of the refueling nozzle 9 is different from the oil type of the fuel tank.

(3) The refueling work is performed and the refueling nozzle 9
When the discharge pipe 9a of is pulled out from the fuel filler port.

After completion of refueling, the discharge pipe 9 of the refueling nozzle 9
When “a” is pulled out from the filler port, the insertion sensor 14 detects this and a non-insertion detection signal (OFF signal) is output to the control circuit 17
The control circuit 17 detects this (S1
2) Deactivate the drive instruction signal that has been output to the pump motor drive circuit 20 and issue a stop instruction for the pump motor 3 (S13). As a result, the pump 4 is stopped at the same time when the discharge pipe 9a of the oil supply nozzle 9 is pulled out from the oil supply port.

Thereafter, the control circuit 17 turns off the flag in the oil type determination flag area 25 (S14), and turns off the oil type determination possible indicator 22 provided in the oil supply device as an oil type determination inability display ( S15).

After that, the control circuit 17 carries out the processing of S1, S2 and S20 and thereafter described in (1) above, and carries out the processing for confirming whether the oil vapor detection element 12 has returned to the state where the oil type can be discriminated. .

(4) When the refueling nozzle 9 is mistakenly inserted into the tank refueling port for an oil type other than gasoline (for example, light oil).

In this case, as described in (2) above, the control circuit 17 issues an alarm generation instruction in S16.
1, and the alarm device 21 is driving.

When this is noticed and the worker pulls out the discharge pipe 9a of the fueling nozzle 9 from the fueling port, the non-insertion detection signal is read from the insertion sensor 14 (S17) and the alarm 21 is deactivated (S18). . After that, the control circuit 17 is configured to perform the same processing from S14 to S15 of (3).

As described above, according to this embodiment, the control device 15 controls the detection resistance value R output from the oil vapor detection element 12.
From the rate of change R _h, since the fuel tank to be refueled can determine whether gasoline or light oil, can significantly shorten the determination time of the oils, it is possible to eliminate an erroneous operation.

Further, in the detection propriety confirmation processing in step S22, the oil type discrimination propriety indicator 22 indicates whether the oil type is discriminated or not based on the magnitude of the resistance value R taken from the oil vapor detection element 12 and the discrimination propriety resistance value R _0. It can be displayed by a lamp, a liquid crystal display or the like as a possible state or a state in which the oil type cannot be discriminated.
As a result, the operator of the gas station can surely know by sight, hearing, etc. whether or not the oil type detection element 12 has returned to a stable state in which the oil type can be detected. It is possible to prevent the situation of refueling.

Further, when the oil type discrimination flag area 25 is in the OFF state by the oil type discrimination prohibiting process in step S3, the oil type discriminating process in step S10 is prohibited, and the oil type detecting element 12 operates after the previous oil type discrimination. It is possible to prevent the next oil type detection operation from being performed in a state where the stable state has not been restored (a state in which the oil vapor has penetrated into the oil type detection element 12).

Although the control device 15 has been described as controlling the drive of the pump motor 3 via the pump motor control circuit 20 in the embodiment, an electromagnetic valve is provided in the middle of the pipe 2.
The solenoid valve may be opened / closed via a solenoid valve control circuit. In this case, step S11 is the "solenoid valve opening instruction",
It suffices to set step S13 as a “solenoid valve closing instruction”.

Further, although the description of the embodiment has been made on the assumption that the discrimination processing of the compatibility of the oil type is mainly performed on gasoline, the discrimination processing of the oil type may be executed mainly on the light oil.

On the other hand, in the embodiment, gasoline and light oil are used as the oils, but the present invention is not limited to these and can be applied when other oils such as kerosene are supplied.

Further, although the fixed type weighing machine is exemplified as the oil supply device of the present invention, it may be applied to a suspended type weighing machine in which the oil supply nozzle is suspended from a high place of the gas supply station.

[0054]

As described in detail above, according to the first aspect of the invention, the discriminating means discriminates from the output value of the detecting element whether or not the oil type in the fuel tank matches the oil type to be refueled. After that, a detection propriety confirmation means for comparing the output value of the detection element and a discriminable reference value smaller than the output value corresponding to the predetermined oil type to confirm whether or not the oil type can be discriminated by the detection element, and Since the informing means for informing whether or not the discriminating operation by the discriminating means is possible based on the output of the confirmation signal from the detectability confirming means is provided, the detecting element returns to a stable state at the next oil type discrimination. It is possible to know visually or audibly by means of the above-mentioned notifying means by the notifying means, and an erroneous judgment is made due to the influence of the output characteristic at the time of the last oil type judgment, and the oil of the wrong oil type is stored in the fuel tank. To prevent refueling It is possible to enhance the safety of the refueling operation.

According to the second aspect of the present invention, the output value of the detection element is determined after the determination means determines from the output value of the detection element whether the oil type in the fuel tank matches the oil type to be refueled. And a detection possibility confirmation means for confirming whether or not the oil type can be discriminated by the detection element by comparing the discrimination value with a discriminable reference value smaller than the output value corresponding to the predetermined oil type; When the confirmation signal is output, the determination means for prohibiting the oil type determination operation by the determination means is provided. Therefore, the detection possibility confirmation means may prevent the oil type detection operation by the detection element. In the confirmed state, the discrimination operation by the detection element is prohibited by the discrimination prohibiting means, and even if the refueling nozzle is inserted into the fuel tank of the vehicle, the type of oil is not discriminated. Not line, the wrong oil type oils into the fuel tank to prevent the refueling, it is possible to enhance the safety of the refueling operation.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a fixed oil supply device used in this embodiment.

FIG. 2 is an enlarged view of a main part of the oil supply nozzle shown in FIG.

FIG. 3 is a vertical sectional view showing an oil vapor detection element.

FIG. 4 is a block diagram showing a circuit configuration of a control device.

5 is an explanatory diagram showing a configuration of a storage area realized in the storage circuit in FIG.

FIG. 6 is a flow chart for performing an oil type determination processing operation.

FIG. 7 is a diagram showing the relationship between the detection time and the detection resistance by the oil vapor detection element.

[Explanation of symbols]

 1 Measuring Machine 2 Piping 3 Pump Motor 4 Pump 5 Flow Meter 7 Lubrication Amount Indicator 8 Hose 9 Lubrication Nozzle 12 Oil Vapor Detecting Element 12a Resistor 12b Water Repellent Resin 15 Controller 16 A / D Circuit 17 Control Circuit 18 Memory Circuit 19 Sampling timer 21 Alarm 22 Oil type distinguishable display

Claims (2)

(57) [Claims] 1. A pipe having one end connected to a tank, a pump provided in the middle of the pipe, a pump driven by a pump motor, and a flow meter for measuring the amount of oil supply, and a pipe provided at the other end of the pipe via a hose. And a fueling nozzle for discharging the oils sent from the pump to the fuel tank, a detection element whose electric output value changes according to the vapor concentration of the oils in the fuel tank, and an output value of the detection element And an output value corresponding to a preset predetermined oil type are compared, and when both are matched, a drive signal is output to the pump motor, or a valve opening signal is output to a solenoid valve provided in the middle of the pipe. In the oil supply device, the detection element compares the output value of the detection element with a discriminable reference value smaller than the output value corresponding to the predetermined oil type after the determination operation by the determination means is completed. By And detecting whether confirmation means for confirming whether it is possible to oil type discrimination Te,
A refueling device, comprising: an informing unit for informing whether or not the discriminating operation by the discriminating unit is possible based on the output of the confirmation signal from the detectability confirming unit. 2. A pipe having one end connected to a tank, a pump provided in the middle of the pipe and a flow meter for measuring an amount of oil supply and a pump driven by a pump motor, and a pipe provided at the other end of the pipe via a hose. And a fueling nozzle for discharging the oils sent from the pump to the fuel tank, a detection element whose electric output value changes according to the vapor concentration of the oils in the fuel tank, and an output value of the detection element And an output value corresponding to a preset predetermined oil type are compared, and when both are matched, a drive signal is output to the pump motor, or a valve opening signal is output to a solenoid valve provided in the middle of the pipe. In the oil supply device, the detection element compares the output value of the detection element with a discriminable reference value smaller than the output value corresponding to the predetermined oil type after the determination operation by the determination means is completed. By And a detection possibility confirmation means for confirming whether or not the oil type can be discriminated, and a discrimination prohibition means for prohibiting the oil type discrimination operation by the discrimination means when the detection feasibility confirmation signal is output from the detection possibility confirmation means. An oil supply device characterized by being provided.