JPH0444999A - Vapor collector in oil supplier - Google Patents

Abstract

PURPOSE:To collect vapor effectively in accordance with generation volume by arranging a vapor sucking means which is driven at a variable speed according to vapor generation volume at a part of a vapor collecting pipe running from a tip end part of an oil supply nozzle to a vapor exhaust end. CONSTITUTION:A vapor sucking blower 12 which is driven by a variable motor 11 is provided in a passage of a vapor collecting pipe 10 which leads vapor sucked from a tip end of an oil supply nozzle 2 into an underground tank or a vapor collector. The variable motor 11 is controlled to revolve corresponding to vapor generation volume in response to a signal from a controller 7 which is obtained as vapor volume generated in a fuel tank by a calculation based on a flow rate pulse signal output from a flow rate pulse oscillator 6 and a detection signal indicating liquid temperature output from a temperature sensor 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vapor recovery device installed in a refueling device.

(Prior Art) When a highly volatile fuel oil such as gasoline is supplied to the fuel tank of an automobile, vapor is generated in the fuel tank. The amount of vapor generated is proportional to the temperature, and there is generally a large temperature difference between the gasoline to be filled and the fuel tank, so a large amount of vapor is distributed throughout the country. Vapor recovery efficiency changes significantly.

The device disclosed in U.S. Pat. No. 4,068,687 disposes a small positive displacement fluid motor in the oil supply path,
A large positive displacement blower is installed in the vapor recovery route.
By connecting these to a common rotating shaft, even if the amount of vapor generated greatly exceeds the amount of refueling, it can be discharged without any problem. In winter, when the fuel temperature is relatively low, the recovery capacity of the blower exceeds the vapor generation, causing problems such as lowering the pressure inside the fuel tank and promoting vaporization of gasoline.

(Problems to be Solved by the Invention) The present invention has been made in view of these problems, and its purpose is to develop a new vapor recovery method that can effectively recover vapor commensurate with the amount of vapor generated. The aim is to provide the following.

(Means for Solving the Problems) That is, the present invention provides a vapor recovery device provided in a fuel supply system to achieve the above-mentioned problems, by installing a part of a one-bar recovery pipe length from the tip of a fuel supply nozzle to the vapor discharge end. A Heber suction means is provided which is driven in a variable speed manner according to the amount of vapor generated.

(Function) With this configuration, vapor can be recovered stably and efficiently depending on the temperature or the amount of fuel supplied, and it can also prevent the occurrence of heber, which occurs due to excess or deficiency in the amount of recovery, or abnormalities in the fuel tank. Prevent pressure rise, etc.

(Example) Therefore, the illustrated embodiment will be explained below.

Figure 1 shows a refueling system which is an embodiment of the present invention. In Figure 0, reference numeral 1 indicates a refueling pipe that leads fuel oil in an underground tank to a refueling nozzle 2. teeth,
In addition to a refueling pump 3 driven by a pump motor M to send out fuel oil in an underground tank toward a refueling nozzle 2, there are also a flow meter 4 that measures the amount of refueling, and a temperature sensor 5 that detects the liquid temperature of the fuel oil. The flow meter 4 is further provided with a flow pulse transmitter 6.
The pulse signal from the temperature sensor 5 and the output signal from the temperature sensor 5 are input to the control table M7.

Reference numeral 10 denotes a Heber recovery pipe that guides the vapor sucked from the tip of the refueling nozzle 2 to an underground tank or a vapor recovery device, and this pipe is equipped with a vapor suction blower 12 driven by a variable speed motor 11. The variable speed motor 11 uses a control table W7 that calculates vapor generated in the fuel tank based on the flow rate pulse signal outputted from the flow rate pulse transmitter 6 and the detection signal indicating the liquid temperature outputted from the temperature sensor 5. The structure is such that the rotation is controlled in accordance with the amount of vapor generated based on the signal from the engine.

Incidentally, in the figure, reference numeral 8 indicates an indicator that displays the amount of oil supplied by a signal from the control table W7, and SW indicates a nozzle switch provided on the nozzle hook 9, respectively.

In the device configured in this way, the nozzle hook 9
When the refueling nozzle 2 is removed from the vehicle, inserted into the fuel filler port of the car, and the lever is pulled, the refueling pump 3 driven by the pump motor M pumps fuel oil from the underground tank 7 through the refueling nozzle 2 into the fuel tank. The flow meter 4 sends the flow pulse signal from the flow pulse transmitter 6 to the control device 7.
The temperature sensor 5 detects the temperature of the fuel oil flowing in the fuel supply pipe 1 and outputs this detection signal to the control device 7.

When the control table W7 inputs the signal from the flow rate pulse transmitter 6, it converts it into an integrated flow rate and outputs it to the display 8, while also inputting the instantaneous flow rate calculated from the flow rate pulse signal and the liquid temperature from the temperature sensor 5. Based on the signal indicating the amount of vapor generated in the fuel tank, the amount of vapor generated in the fuel tank is calculated from the data inputted in advance, and a signal corresponding to the calculated amount is outputted to the variable speed motor 11. By causing rotation, the vapor in the fuel tank is collected into an underground tank or a vapor recovery device by a vapor suction blower 12.

The embodiment shown in FIG. 2 is a manual configuration of the first embodiment described above, and a part of the main body of the refueling system is equipped with a
A changeover switch 25 for each season or temperature such as spring, autumn, or summer is provided and connected to the control table W7, and one seasonal signal or temperature signal selected by the changeover switch 25 is output from the flow rate pulse transmitter 6. variable speed motor 21 based on the instantaneous flow rate signal calculated from the flow rate signal of
The number of revolutions of the vapor suction blower 22ζ is set to apply a suction force according to the season or the temperature and instantaneous flow rate at that time, and the vapor in the fuel tank is recovered.

On the other hand, the third embodiment shown in FIG. 3 focuses on the proportional relationship between the amount of oil supplied and the amount of vapor generated, and relies on a drive motor to drive the vapor suction blower 32. Instead, it is driven by using fuel oil flowing inside the fuel supply pipe 1.

That is, in this embodiment, a positive displacement fluid motor 31 consisting of a pair of star-shaped rotors is disposed in a part of the oil supply pipe, and a pair of star-shaped rotors are connected to the output shaft of the motor 31 via a transmission 33. A positive displacement vapor suction blower 32 consisting of the like is connected, and a transmission 33 interposed between the two is controlled by a temperature detector 35 disposed in a part of the oil supply pipe 1. be.

As the transmission used here, for example, the
It is possible to use a transmission known before this application as shown in Japanese Patent No. 15365, and an eccentric arm provided in this transmission is operated by an output member of a temperature detector 35 that is displaced depending on the liquid temperature. Alternatively, a well-known continuously variable transmission using a booster may be used, and the distance between the axes of the split booster may be adjusted by the output member of the temperature sensor 35 that changes depending on the liquid temperature. Suction blower 32
is configured to apply a rotational speed according to the liquid temperature.

In this embodiment, between the instantaneous flow rate and the temperature of the fuel oil that determine the rotation speed of the vapor suction blower 32, the instantaneous flow rate is controlled by the positive displacement fluid motor 31 that rotates in proportion to the instantaneous flow rate, and the temperature , a temperature detector 35 that responds to this
It can be controlled mechanically by

The embodiment shown in FIG. 4 is a manual configuration of the third embodiment shown in FIG. The vapor suction blower 42 is actuated through the control lever, while the transmission 43 is adjusted by an adjustment lever 45 that can be shifted depending on the temperature or season.

On the other hand, the embodiment shown in FIG. 5 is a rough development of the third embodiment shown in FIG. While the blower 52 is connected, a temperature sensor 5 disposed in a part of the oil supply pipe 1
4 to control the transmission 53.

According to this embodiment, the blower for direct vapor suction is equipped with a flow meter 4 that rotates in proportion to the instantaneous flow rate of fuel oil without using the positive displacement fluid motor 31 as seen in the third embodiment. 52 and the mechanism can be primed for that time.

The embodiment shown in FIG. 6 is a manual version of the fifth embodiment shown in FIG. While driving the air blower 62, the transmission 63 is configured to be adjustable by an adjustment lever 65 that can be shifted depending on the temperature or season.

(Effects) As described above, according to the present invention, vapor suction means that is driven in a variable speed manner according to the amount of Heber generated is disposed in a part of the Heber recovery pipe, so In addition to being able to recover vapor stably and efficiently, it is also possible to prevent the occurrence of vapor generation and abnormal pressure increases in the fuel tank that occur due to excess or deficiency in the amount of recovery. .

[Brief explanation of the drawing]

1 to 6 are configuration diagrams of oil supply devices showing respective embodiments of the present invention. 1... Oil supply pipe 3... Oil supply pump 4... Measuring device 5... Temperature sensor 7... Control equipment 8... Display 11
．． 21... Variable speed motor 9 31.41... Positive displacement fluid motor 12.22.32.42.52.62... Vapor suction blower 33.43.53.63... Transmission 25... Changeover switch 35.55... Temperature detector 45.65... Adjustment lever

Claims (1)

[Claims] A vapor recovery device in a refueling device, in which a vapor suction means that is driven in a variable speed manner according to the amount of vapor generated is disposed in a part of a vapor recovery conduit from the tip of a refueling nozzle to a vapor discharge end.