JP2010094640A - Vapor recovery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vapor recovery device of an oil feeder causing no detachment of an adsorbent still having sufficient adsorbability, and causing no releasing of gasoline vapor to the atmosphere due to supersaturation of the adsorbent. <P>SOLUTION: In the vapor recovery device, a first pump 19 is interposed in a recovery pipe 15 connected to an opening 17 at the end of an oil feed nozzle 8, the recovery pipe 15 is opened at a gas/liquid separation chamber 21 via a condensing tank 20, the gas/liquid separation chamber 21 is connected to a first or a second adsorbing column 33 or 34, a second pump 49 is interposed in a circulation pipe 48 connected to the first or second adsorbing column 33 or 34, the circulation pipe 48 is connected to a suction side of the first pump 19, and a control device 14 switches between an adsorption process and a desorption process based on the oil feed amount. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vapor recovery apparatus that is installed in a fueling station that supplies fuel oil to an automobile and collects gasoline vapor that flows out of the fuel tank of the automobile during refueling.

  Fuel oil such as gasoline has high volatility, and when fuel is supplied to a fuel tank of an automobile, gasoline vapor proportional to the amount of fuel flows out from the fuel tank. When this gasoline vapor is released into the atmosphere, not only is the resource wasted, but there is also a risk of fire due to ignition and the risk of environmental pollution.

In order to deal with such inconvenience, the gasoline vapor flowing out from the fuel tank during refueling is recovered, the gasoline vapor is cooled and condensed and liquefied, and the gasoline vapor that could not be liquefied is adsorbed to the adsorbent, and the gasoline vapor There has been proposed a vapor recovery device that discharges a gas that does not contain gas into the atmosphere (see Patent Document 1).
Here, in the vapor recovery apparatus of the related art (Patent Document 1), it is determined whether or not the adsorbent is saturated by the gasoline vapor, in other words, adsorption by the adsorbent in the adsorption tower and desorption of the adsorbent ( (Regeneration) is switched based on the sum of the refueling times.

However, the amount of oil to be supplied (flow rate) is not uniform in all oil supply times, and there are cases where the flow rate is high during oil supply or the flow rate is reduced (flow rate is low).
For example, if refueling with a high flow rate is performed for a long time, the amount of gasoline vapor generated increases, and the adsorbent becomes saturated before the adsorbent is desorbed. There is a risk that gasoline vapor will be released into the atmosphere without adsorbing.
On the other hand, when refueling with a reduced flow rate is performed over a long period of time, there is a disadvantage that the adsorbent adsorbing capacity has a sufficient margin and the process is switched to the desorption process. To do.
JP 2006-198604 A

  The present invention has been made in view of the above, and does not desorb an adsorbent having a sufficient adsorption capacity, and the vapor recovery of a fueling machine in which the adsorbent is supersaturated and gasoline vapor is not released into the atmosphere. The object is to provide a device.

  The vapor recovery device (13) of the present invention includes an oil supply system and a gasoline vapor recovery system. The oil supply system has one end connected to an oil storage tank (1, 1R, 1H: underground tank) and the other end an oil supply hose (7 ), An oil supply pump (5) and a flow meter (6) interposed in the oil supply pipe (2), one end of the gasoline vapor recovery system being an oil supply nozzle (8) A vapor return pipe (recovery pipe 15, air supply pipe 30, circulation pipes 48, 48A) opened in the vicinity (17), a condensing device (condensing tank 20) and an adsorption / desorption device (contained in the vapor return pipe) First and second adsorption towers 33, 34), the condensing device (20) has a function of condensing and removing water vapor and gasoline vapor, and the adsorption / desorption devices (33, 34) are condensing devices. (20) is provided downstream of the adsorbent (35) It has a packed first or second adsorption tower (33, 34) and is equipped with a control device (recovery control unit 14). The control device (14) receives a measurement signal from the flow meter (6). Based on this, the function of switching the first or second adsorption tower (33, 34) between an adsorption process for adsorbing gasoline vapor with the adsorbent (35) and a desorption process for desorbing (regenerating) the adsorbent (35). It is characterized by having (Claim 1).

  The vapor recovery device (13) of the present invention described above includes an oil supply pump (5) and a flow meter (6) in an oil supply pipe (2) connected to an oil storage tank (1, 1R, 1H), and an oil supply pipe. In the vapor recovery device (13) of the oil supply machine (3) provided with the oil supply nozzle (8) at the tip of the oil supply hose (7) connected to (2), the recovery opened at the tip of the oil supply nozzle (8) (17) A pipe (15) is provided with a first pump (19: compression pump), a recovery pipe (15) is opened to a gas-liquid separation chamber (21) via a condensation tank (20), and a gas-liquid separation chamber ( 21) is connected to the first and second adsorption towers (33, 34), and the second pump (49) is connected to the circulation pipe (48) connected to the first and second adsorption towers (33, 34). : Vacuum pump) and the discharge side of the second pump (49) is connected to the first pump (19) via the circulation pipe (48A). The gas-liquid separation chamber (21) is selectively connected to the first or second adsorption tower (33, 34) by connecting to the inlet side, and the gasoline vapor is adsorbed (35 in the adsorption tower (33, 34)). ) And the first or second adsorption tower (33, 34) are selectively connected to the second pump (49) to desorb the gasoline vapor adsorbed on the adsorbent (35). A recovery control unit (14) having a function of performing switching to the desorption process is provided, and the recovery control unit (14) is an adsorption process based on the amount of oil measured by the flow meter (6) of the oil feeder (3). It is preferable to have a function of switching between the desorption step and the desorption step.

The gas-liquid separation chamber (21) is connected to the first adsorption tower (33) via an air supply pipe (30) provided with an on-off valve (31), and an on-off valve (32) is provided. The first and second adsorption towers (33, 34) are connected to the second adsorption tower (34) via the air supply pipe (30), and one end of the first and second adsorption towers (33, 34) is open to the atmosphere and an on-off valve ( 38, 39) and an exhaust pipe (44) having one end open to the atmosphere and an on-off valve (42, 43) are connected to each other. The circulation pipe (48) connecting the second adsorption tower (33, 34) and the second pump (49) is provided with an open / close valve (46, 47), and the control device (recovery control unit 14). )
When switching the first adsorption tower (33) to the desorption process and switching the second adsorption tower (34) to the adsorption process, the on-off valve (31) is closed and the gas-liquid separation chamber (21) and the first The communication with the adsorption tower (33) is cut off, the on-off valve (42) is closed, and the first adsorption tower (33) is cut off from communicating with the atmosphere through the exhaust pipe (44). ) Is opened to allow the first adsorption tower (33) to communicate with the atmosphere via the intake pipe (40), the on-off valve (46) is opened and the first adsorption tower (33) via the circulation pipe (48). Is connected to the suction side of the second pump (49), the on-off valve (32) is opened to connect the gas-liquid separation chamber (21) and the second adsorption tower (34), and the on-off valve (43) is connected. The second adsorption tower (34) is opened and communicated with the atmosphere through the exhaust pipe (44), the on-off valve (39) is closed, and the second adsorption tower (34) is connected to the intake pipe (4). ) Through to block the communication with the atmosphere, to block the communication between the suction side of the second adsorption tower is closed off valve (47) and (34) a second pump (49),
When the first adsorption tower (33) is switched to the adsorption process and the second adsorption tower (34) is switched to the desorption process, the on-off valve (31) is opened to open the gas-liquid separation chamber (21) and the first The adsorption tower (33) is communicated, the on-off valve (42) is opened, the first adsorption tower (33) is communicated with the atmosphere via the exhaust pipe (44), and the on-off valve (38) is closed to close the first The adsorbing tower (33) is blocked from communicating with the atmosphere via the intake pipe (40), the on-off valve (46) is closed, and the first adsorbing tower (33) is sucked by the second pump (49). The communication between the gas-liquid separation chamber (21) and the second adsorption tower (34) is blocked, the open / close valve (43) is closed, and the exhaust pipe is closed. The second adsorption tower (34) is blocked from communicating with the atmosphere via (44), the on-off valve (39) is opened, and the second adsorption tower (3) via the intake pipe (40). ) Communicates with the atmosphere, opens the on-off valve (47), and communicates the second adsorption tower (34) and the suction side of the second pump (49) via the circulation pipe (48). It is preferable.

  In the present invention, the control device (recovery control unit 14) selectively connects the gas-liquid separation chamber (21) to the first or second adsorption tower (33, 34) so that gasoline vapor is adsorbed to the adsorption tower (33). , 34) and the first or second adsorption tower (33, 34) selectively connected to the second pump (49) to adsorb to the adsorbent (35) in the adsorbent (35). When performing switching to the desorption process for desorbing the gasoline vapor adsorbed on the on-off valves (31, 32, 38, 39, 42) interposed in the pipe connected to the adsorption tower (33, 34) , 43, 46, and 47) are opened, and the opening and closing valves (31, 32, 38, 39, 42, 43, 46, and 47) are controlled to open and close after a lapse of a certain time (for example, 2 seconds). Preferred (claim 2).

  In the present invention, the control device (recovery control unit 14) selectively connects the gas-liquid separation chamber (21) to the first or second adsorption tower (33, 34) to remove gasoline vapor from the adsorption tower ( 33, 34) and an adsorbing step for adsorbing the adsorbent (35) by selectively connecting the first or second adsorption tower (33, 34) to the second pump (49). ), The second pump (49) is stopped for a certain period of time (for example, 12 seconds), and after the certain period of time has elapsed, It is preferable to have a function of driving the pump (49).

  In the present invention, the air supply pipe (30) and the circulation pipe (48) connected to the adsorption tower (33, 34) are provided with pressure sensors (50, 51), and the control device (recovery control unit 14). Preferably has a function of stopping the first and second pumps (19, 49) when the pressure measured by the pressure sensor (50, 51) is out of a certain range. ).

  Alternatively, in the present invention, the temperature sensor (28) for measuring the temperature of the cooling medium (cooling liquid 22 in the condensing tank 20) of the condensing device (condensing tank 20) and the outside air temperature are measured. A temperature sensor (29), and the control device (collection control unit 14) determines a time required for cooling the cooling medium (22) based on a measurement result of the temperature sensor (29) for measuring the outside air temperature, If the temperature of the cooling medium (22) after the necessary time elapses is higher than a threshold value (constant temperature), the cooling device (cooler 23) for cooling the cooling medium is stopped. (Claim 5).

  In addition, a plurality of the refueling machines (3) are provided, and the control device (recovery control unit 14) issues a signal indicating the number of refueling machines (3) that are refueling (refueling is in progress). Preferably, the first pump (19) has a function of controlling the capacity of the first pump (19) (frequency of the inverter motor as a drive source) based on the number of the refueling machines 3).

The effects of the present invention are listed below.
(1) Since switching between the adsorption process and the desorption process is performed in accordance with the amount of oil supply, it is prevented that the adsorption process is shifted to the desorption process with a large amount of adsorption capacity left, and the adsorption process exceeds the adsorption capacity. Proceeding is also prevented, the reliability of the recovery of the gasoline vapor can be ensured, and unnecessary switching of the adsorption / desorption process is prevented.
(2) When switching between the adsorption process and the desorption process, after all the on-off valves are opened for a predetermined time (for example, 2 seconds) and the pressure in the pipes becomes uniform, the first and second adsorption towers Since the opening / closing control of the opening / closing valve is performed corresponding to the adsorption process / desorption process, the opening / closing operation of the opening / closing valve can be performed smoothly.
(3) When switching between the adsorption process and the desorption process, the driving of the second pump is stopped for a predetermined time (for example, 12 seconds), and the amount of gasoline vapor from the adsorption tower in the desorption process becomes normal. Since the second pump is driven after that, only the gasoline vapor desorbed from the adsorption tower is supplied to the suction side of the first pump, or the gasoline vapor desorbed from the adsorption tower flows back to the oil supply side. The situation of doing can be prevented.
(4) Since the air supply pipe and the circulation pipe of the adsorption tower stop and notify when the pressure is outside a certain range, it is possible to easily know the failure of the equipment and to ensure the reliability of the recovery of the gasoline vapor.
(5) Since the temperature of the cooling liquid in the condensing tank is stopped and notified if the temperature is not lower than a certain temperature, it is possible to easily know the failure of the cooling machine and to ensure the reliability of gasoline vapor recovery. .
(6) When a plurality of fueling machines are connected to the vapor recovery device, the driving speed of the first pump is controlled in accordance with the number of fueling machines being refueled, so a large amount of air is sucked together with the gasoline vapor. This prevents the gas vapor from being sucked in.
(7) By reliably recovering gasoline vapor, waste of resources can be eliminated and air pollution can be prevented.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows the whole of a filling station in which a vapor recovery device for a filling machine according to the present invention is installed.
An oil storage tank 1 is embedded in the basement of the filling station, and an oil supply pipe 2 connected to the oil storage tank 1 is disposed in a housing 4 of the oil supply machine 3.

In the housing 4, an oil supply pump 5 and a flow meter 6 are interposed in the oil supply pipe 2, and an oil supply hose 7 is connected to the oil supply pipe 2.
An oil supply nozzle 8 is provided at the tip of the oil supply hose 7. The oil supply nozzle 8 is hung on a nozzle hook 9, and a nozzle switch 10 is provided on the nozzle hook 9. The nozzle switch 10 outputs an ON signal when the fueling nozzle is removed from the nozzle hook 9.

The fueling machine 3 is provided with a fueling control unit 11.
The oil supply control unit 11 receives the ON signal from the nozzle switch 10, drives the oil supply pump 5, counts the flow rate signal from the flow meter 6, displays the oil supply amount on the display 12, and collects these signals by vapor recovery The information is transmitted to the collection control unit 14 of the apparatus 13.

The vapor recovery device of the fueling machine 3 according to the present invention is generally indicated by reference numeral 13 in FIG. The entire vapor recovery device 13 of the fuel filler 3 is schematically shown in FIG.
In FIG. 2, gasoline vapor flowing out from a fuel tank of an automobile (not shown) is recovered by a recovery pipe 15. The recovery pipe 15 is provided alongside the oil supply hose 7 and communicates with the inside of the housing 16 of the vapor recovery device 13 via the inside of the housing 4 of the oil supply machine 3.

One end of the recovery pipe 15 is opened at the tip of the oil supply nozzle 8.
A check valve 18 and a compression pump 19 (first pump) are interposed in the recovery pipe 15. The end of the recovery pipe 15 opposite to the oil supply nozzle 8 opens into the gas-liquid separation chamber 21 via the condensation tank 20.
The condensing tank 20 is filled with a cooling liquid 22, and the cooling liquid 22 is cooled by a cooler 23.

The gasoline vapor and water vapor flowing through the recovery pipe 15 are condensed by exchanging heat with the cooling liquid 22 when flowing through the condensing tank 20 to become water (liquid phase state).
In the gas-liquid separation chamber 21, the condensed water is separated from the liquefied gasoline and gasoline vapor and discharged to the outside of the vapor recovery device 13 through the drain pipe 24. The liquefied gasoline is recovered through the recovery pipe 25 of the gas-liquid separation chamber 21 to the oil feeder 3, the oil storage tank 1, and the like.
In FIG. 2, reference numeral 26 indicates a cock provided in the drain pipe 24, and when condensed water accumulates in a certain amount in the gas-liquid separation chamber 21, the cock 26 is opened to the outside of the vapor recovery device 13. Discharge. Reference numeral 27 denotes a cock provided in the recovery pipe 25, which is opened when a certain amount or more of liquefied gasoline accumulates in the gas-liquid separation chamber 21, and the liquefied gasoline is supplied to the oil feeder 3 or the oil storage tank 1 or the like. Send it out.
2 is a temperature sensor that measures the temperature of the coolant 22, and 29 is a temperature sensor that measures the outside air temperature.

The air supply pipe 30 connected to the gas layer portion (the area where gas is stored) of the gas-liquid separation chamber 21 includes a pipe interposing an on-off valve 31 and a pipe interposing an on-off valve 32. The pipe that is branched to and connected to the first adsorption tower 33 is connected to the first adsorption tower 33, and the pipe that is equipped to the open / close valve 32 is connected to the second adsorption tower 34.
Adsorbents 35 are filled in the adsorption towers 33 and 34. As the adsorbent 35, a material that adsorbs gasoline vapor efficiently and is easily desorbed is selected. For example, silica gel or zeolite having a pore diameter of 4 to 100 angstroms is used.

A cooling pipe 36 is disposed in the adsorption towers 33 and 34, and the cooling pipe 36 communicates with the condensing tank 20.
By driving the cooling pump 37, the cooling liquid 22 in the condensing tank 20 circulates through the cooling pipe 36 to cool the inside of the adsorption towers 33 and 34, and the adsorption efficiency of the adsorbent 35 is improved.

An intake pipe having an open / close valve 38 is connected to the lower part of the adsorption tower 33, and an intake pipe having an open / close valve 39 is connected to the lower part of the adsorption tower 34. Here, the intake pipe provided with the open / close valve 38 and the intake pipe provided with the open / close valve 39 are intake pipes branched from the intake pipe 40 communicating with the atmosphere. It is intervened.
On the other hand, an exhaust pipe having an opening / closing valve 42 is connected to the upper part of the adsorption tower 33, and an exhaust pipe having an opening / closing valve 43 is connected to the upper part of the adsorption tower 34. The exhaust pipe interposing the on-off valve 42 and the exhaust pipe interposing the on-off valve 43 merge to constitute an exhaust pipe 44. A relief valve 45 is interposed in the exhaust pipe 44, and the end of the exhaust pipe 44 communicates with the atmosphere side.

Further, a circulation pipe having an opening / closing valve 46 is connected to the upper part of the adsorption tower 33, and a circulation pipe having an opening / closing valve 47 is connected to the upper part of the adsorption tower 34. A circulation pipe interposing the on-off valve 46 and a circulation pipe interposing the on-off valve 47 join together to constitute a circulation pipe 48.
A vacuum pump 49 is interposed in the circulation pipe 48, and the circulation pipe 48 is connected to the suction side of the vacuum pump 49 (second pump).
The circulation pipe 48 </ b> A connected to the discharge side of the vacuum pump 49 is connected to the junction B <b> 1 in the suction side region of the compression pump 19 in the recovery pipe 15 and joins the recovery pipe 15.

In FIG. 2, reference numeral 50 indicates a pressure sensor that measures the pressure in the air supply pipe 30.
Further, reference numeral 51 in FIG. 2 denotes a pressure sensor that measures the pressure in the circulation pipe 48.
In FIG. 2, a vapor return pipe is constituted by the recovery pipe 15, the air supply pipe 30, the circulation pipe 48, and the circulation pipe 48A.

The apparatus which concerns on control of the vapor collection | recovery apparatus 13 of the fuel supply machine 3 is shown by the block in FIG.
In FIG. 3, the oil supply control unit 11 of the oil supply machine 3 has a function of receiving an on / off signal of the nozzle switch 10 and a flow rate signal of the flow meter 6, a function of outputting a drive signal to the pump 5, and a display 12. And a function of outputting an oil supply amount display signal.

In FIG. 3, the recovery control unit 14 of the vapor recovery apparatus 13 has a function of receiving temperature signals of the temperature sensors 28 and 29 and a pressure signal of the pressure sensors 50 and 51, and a function of receiving a time signal from the timer TM. Have.
Further, the recovery control unit 14 of the vapor recovery apparatus 13 has a function of outputting an open / close control signal (open / close signal) to the open / close valves 31, 32, 38, 39, 42, 43, 46, 47.
Further, the recovery control unit 14 has a function of outputting a drive signal to the pumps 19, 37, 49, a function of outputting a drive signal to the cooler 23, and a function of outputting a notification signal to the alarm 52. .
The refueling control unit 11 and the collection control unit 14 are connected in information, and control signals are exchanged between them. In other words, a flow rate signal of the flow meter 6, that is, a signal related to the amount of oil supply is input to the recovery control unit 14 of the vapor recovery device 13 from the oil supply control unit 11 of the fuel filler 3.

Next, with reference to FIG. 2, FIG. 3, the effect | action in the vapor collection apparatus 13 of a fueling machine is demonstrated.
While the gas station is in operation, the cooler 23 is driven to cool the coolant 22 in the condensing tank 20 to a certain temperature (for example, 5 ° C. or less). The cooled coolant 22 cools the adsorbent 35 in the adsorption towers 33 and 34.
Here, the first adsorption tower 33 adsorbs gasoline vapor (adsorption process), and desorbs (or regenerates) the adsorbent filled in the second adsorption tower 34 (adsorption process). To do. In such a case, the on-off valves 31, 39, 42, 47 are open, and the on-off valves 32, 38, 43, 46 are closed.
Here, when gasoline vapor is adsorbed in one adsorption tower, desorption (or regeneration) of the adsorbent filled therein is performed in the other adsorption tower.

When the oil supply nozzle 8 is removed from the nozzle hook 9 in order to supply oil to the automobile, the nozzle switch 10 is turned on and an on signal is transmitted. The oil supply control unit 11 that has received the ON signal drives the oil supply pump 5 and sends a signal indicating that oil is being supplied to the recovery control unit 14 of the vapor recovery device 13. The recovery control unit 14 that has received a signal indicating that refueling is in progress from the oil supply control unit 11 drives the compression pump 19.
When the fueling nozzle 8 is inserted into a fuel tank of an automobile (not shown) and fueling is started, gasoline in the oil storage tank 1 is pumped by the fueling pump 5 and discharged from the fueling nozzle 8 into a fuel tank of the automobile (not shown). The At that time, the amount of oil measured by the flow meter 6 is displayed on the display 12, and an oil amount signal based on the measurement result of the flow meter 6 is sent to the recovery control unit 14 of the vapor recovery device 13.

When refueling, gasoline vapor flows out from a fuel tank of an automobile (not shown), and the gasoline vapor that flows out flows into the recovery pipe 15 from the opening 17 of the recovery pipe 15 by the action of the compression pump 19.
The gasoline vapor that has flowed into the recovery pipe 15 is cooled in the condensing tank 20, and most of it is liquefied. The liquefied gasoline collects in the lower part of the gas-liquid separation chamber 21 and is returned to the oil feeder 3 and the oil storage tank 1 through the recovery pipe 25.
The gasoline vapor that has not been liquefied in the condensing tank 20 flows through the air supply pipe 30 and flows into the first adsorption tower 33 via the on-off valve 31. The gas flowing into the adsorption tower 33 is pressurized by the compression pump 19 to about 250 Kpa, for example.

  The gasoline vapor that has flowed into the first adsorption tower 33 is adsorbed by the adsorbent 35 in the adsorption tower 33, and the gas discharged from the first adsorption tower 33 is a gas that does not contain gasoline vapor. Such gas (gas not including gasoline vapor) is discharged from the exhaust pipe 44 into the atmosphere via the on-off valve 42 and the relief valve 45.

In this way, most of the gasoline vapor flowing out from the fuel tank of the automobile during refueling is condensed and liquefied in the condensing tank 20 of the vapor recovery device 13 and recovered in the gas-liquid separation chamber 21. The gasoline vapor that has not been liquefied in the condensing tank 20 is adsorbed and recovered by the adsorbent 35 of the adsorption tower 33.
The gasoline vapor adsorbed by the adsorption tower 33 is separated from the adsorbent 35 when the adsorption tower 33 is in the desorption process, and is sucked by the vacuum pump 49 via the open / close valve 46 and the circulation pipe 48. Is done. The gasoline vapor discharged from the vacuum pump 49 flows into the suction side of the compression pump 19 through the circulation pipe 48A and the junction B1.
That is, the gasoline vapor is recovered without leaking out of the fueling device 3.

Next, switching between adsorption / desorption between the first adsorption tower 33 and the second adsorption tower 34 will be described with reference to FIG.
In the description related to FIGS. 4 to 6 (explanation of switching of adsorption / desorption of the adsorption towers 33 and 34), the first adsorption tower 33 is filled from the process of adsorbing gasoline vapor (adsorption process). The case where the second adsorbing tower 34 is switched from the desorption process to the adsorption process will be described as an example.

In FIG. 4, in step ST <b> 1, the recovery control unit 14 of the vapor recovery device 13 determines whether or not an oil supply amount signal is input from the oil supply control unit 11 of the fuel filler 3, in other words, whether or not fueling is in progress. to decide.
If refueling is in progress, that is, if a refueling amount signal is input from the refueling control unit 11 to the recovery control unit 14 (YES in step ST1), the integrated value of the refueling amount (previous, adsorption / The sum of the amount of oil supply after the switching of desorption is performed (step ST2).

Next, it is determined whether or not the integrated value obtained in step ST2 is greater than or equal to a threshold value (step ST3).
Here, the threshold value is an integrated value of the amount of oil supply, and the adsorbent 35 in the first adsorption tower 33 sufficiently adsorbs gasoline vapor and seems to approach a saturated state (for example, 500 liters). ) Is set.
When the integrated value is equal to or greater than the threshold value (YES in step ST3), the first adsorption tower 33 that has been performing the adsorption process performs the desorption process, and the second adsorption tower 34 that has been performing the desorption process is The on-off valve is controlled to open and close so as to execute the adsorption process (step ST4). Then, the integrated value of the fuel supply amount (integrated value obtained in step ST2) is reset (step ST5).
If the integrated value is less than the threshold value in step ST3 (NO in step ST3), the process returns to step ST1.

In step ST4, the first adsorption tower 33 that has been performing the adsorption process performs the desorption process, and the second adsorption tower 34 that has been performing the desorption process performs the adsorption process in FIG. The valves 31, 39, 42 and 47 are closed, and the open / close 32, 38, 43 and 46 are opened.
Gasoline vapor that has not been liquefied in the coagulation tank 20 by the opening / closing control of the opening / closing valve is supplied to the second adsorption tower 34 via a pipe having an air supply pipe 30 and an opening / closing valve 32 interposed therebetween. The gasoline vapor is adsorbed by the adsorbent 35 in the adsorption tower 34, and the air not containing the gasoline vapor is released from the exhaust pipe 44 into the atmosphere.
On the other hand, the first adsorption tower 33 communicates with a vacuum pump 49 via a pipe provided with an opening / closing valve 46 and a circulation pipe 48. By driving the vacuum pump 49, a negative pressure acts inside the first adsorption tower 33, the gasoline vapor adsorbed on the adsorbent 35 is sucked into the vacuum pump 49, and the adsorbent is desorbed.

Desorption in the first adsorption tower 33 will be described in more detail with reference to FIG. 2. When the vacuum pump 49 is driven, the gas in the adsorption tower 33 is evacuated by the vacuum pump 49. Here, since the on-off valve 38 is opened, the amount of air limited by the throttle 41 flows from the intake pipe 40 into the adsorption tower 33 evacuated by the vacuum pump 49. As a result, the inside of the adsorption tower 33 becomes a negative pressure, for example, a negative pressure of about −30 Kpa, and the gasoline vapor adsorbed by the adsorbent 35 in the adsorption tower 33 is also sucked by the vacuum pump 49.
The gasoline vapor discharged from the vacuum pump is cooled and condensed in the condensing tank 20 through the circulation pipe 48A, the junction B1, the compression pump 19, and the recovery pipe 15. Note that since the recovery pipe 15 is provided with the check valve 18, the gasoline vapor does not flow out from the opening 17 of the fuel supply nozzle 8 into the atmosphere.

  In order for the first adsorption tower 33 that has been performing the desorption process to perform the adsorption process and the second adsorption tower 34 that has been performing the adsorption process to perform the desorption process, in FIG. , 39, 42, 47 may be opened, and the opening / closing 32, 38, 43, 46 may be closed.

When switching the adsorption / desorption between the first adsorption tower 33 and the second adsorption tower 34 shown in FIG. 4, the on-off valves 31, 32, 38, 39, 42, 43, 46, 47 in step ST4 are changed to step ST2. When the integrated value of the refueling amount obtained in the above is equal to or greater than the threshold value (YES in step ST3), the opening and closing can be switched instantaneously.
However, if the open / close state of the open / close valve is switched instantaneously, positive pressure and negative pressure simultaneously act on the open / close valve, which may make it difficult to reliably open or close. For example, when switching the adsorption tower 34 from the desorption process to the adsorption process, if the opening / closing of the on-off valves 31, 32, 38, 39, 42, 43, 46, 47 is switched instantaneously, There is a possibility that a negative pressure (for example, about −30 kPa) from the pump 49 side and a positive pressure (for example, 250 Kpa) from the compression pump 19 acting in the adsorption tower 34 may act simultaneously.
If a positive pressure and a negative pressure act on the on-off valve 47 at the same time, the on-off valve 47 to be closed may not be completely closed.

In order to prevent positive pressure and negative pressure from acting on the on-off valve at the same time, in the illustrated embodiment, when switching between the adsorption process and the desorption process, the on-off valve is not switched on and off instantaneously. The control shown in the flowchart is executed.
With reference to FIG. 5, opening and closing of the on-off valves 31, 32, 38, 39, 42, 43, 46, and 47 will be described.

The control shown in the flowchart of FIG. 5 is performed at the stage where the first adsorption tower 33 is switched from the adsorption process to the desorption process and the second adsorption tower 34 is switched from the desorption process to the adsorption process in step ST4 of FIG. Is done. Accordingly, in FIG. 5, first, in step ST21, it is determined whether or not the switching in step ST4 in FIG. 4 is to be performed.
If the first adsorption tower 33 is switched from the adsorption process to the desorption process and the second adsorption tower 34 is switched from the desorption process to the adsorption process (YES in step ST21), all the open / close valves 31, 32, 38, 39, 42, 43, 46, and 47 are opened, and time measurement by the timer TM (see FIG. 3) is started (step ST22).
Here, the time measurement by the timer TM is performed in order to open all of the on-off valves 31, 32, 38, 39, 42, 43, 46, and 47 for a predetermined time (for example, 2 seconds). Therefore, in step ST23, it is determined whether or not the time counted by the timer TM has reached the predetermined time (2 seconds).

If the time counted by the timer TM, in other words, the time when all of the on-off valves 31, 32, 38, 39, 42, 43, 46, 47 are opened for a certain time (2 seconds) (step) ST23 is YES), the on-off valves 31, 39, 42, 47 are closed and the on-off valves 32, 38, 43, 47 are opened (step ST24).
Thereby, the 1st adsorption tower 33 can perform a desorption process, and the 2nd adsorption tower 34 can perform a desorption process.
If the opening / closing control in step ST24 is completed, the process returns to step ST21. In step ST21, step ST26 executes a NO loop until step ST4 is executed in the control of FIG. 4, that is, until adsorption and desorption are switched.

In the control shown in FIG. 5, in step ST22, the first adsorption tower 33 is opened by opening all the on-off valves 31, 32, 38, 39, 42, 43, 46, 47 for a certain time (for example, 2 seconds). And the pressure of the tube system including the second adsorption tower 34 are equal.
For example, the first adsorption tower 33 performs the desorption process in a state where the pressures of the pipe system including the first adsorption tower 33 and the pipe system including the second adsorption tower 34 are equalized. Even if the second adsorption tower 34 opens and closes the on-off valve to perform the desorption process, positive pressure and negative pressure are applied to the on-off valves 31, 32, 38, 39, 42, 43, 46, 47. It does not act at the same time, and the opening / closing operation of the opening / closing valve is performed smoothly and reliably, and the reliability of the opening / closing valve opening / closing control can be improved.

Here, if the open / close state of the open / close valve is switched instantaneously, the above-mentioned problem (positive pressure and negative pressure act simultaneously on the open / close valve, the open / close control of the open / close valve is not performed smoothly, and the reliability is written. In addition to the problem of becoming a state, there is a risk of causing the following disadvantages.
As described above, when the first adsorption tower 33 is switched from the adsorption process to the desorption process, and the second adsorption tower 34 is switched from the desorption process to the adsorption process, the first adsorption tower 33 has sufficiently adsorbed gasoline vapor. When a negative pressure from the vacuum pump 49 is instantaneously applied to one adsorption tower 33, a large amount of gasoline vapor is sucked into the vacuum pump 49 from the adsorbent 35 in the first adsorption tower 33. The sucked gasoline vapor is discharged in a compressed state by the vacuum pump 49, and joins the recovery pipe 15 via the circulation pipe 48A and the junction B1.

That is, when the open / close state of the open / close valve is switched instantaneously, immediately after the switching, the high concentration and large amount of gasoline vapor discharged from the vacuum pump 49 is supplied to the suction side of the compression pump 19.
When such a situation occurs, the amount of gasoline vapor sucked by the compression pump 19 from the opening 17 of the oil supply nozzle 8 and sent to the coagulation tank 20 is reduced. Alternatively, there is a possibility that a high concentration and a large amount of gasoline vapor discharged from the vacuum pump 49 may flow backward to the opening 17 side of the fuel supply nozzle 8.

Such inconvenience is dealt with by executing the control as shown in FIG. 6 in the illustrated embodiment.
The control shown in the flowchart of FIG. 6 is performed at a stage where the first adsorption tower 33 is switched from the adsorption process to the desorption process and the second adsorption tower 34 is switched from the desorption process to the adsorption process in step ST4 of FIG. Is done.
Therefore, also in FIG. 6, first in step ST26, it is determined whether or not the switching in step ST4 in FIG.
If the first adsorption tower 33 is switched from the adsorption process to the desorption process and the second adsorption tower 34 is switched from the desorption process to the adsorption process (YES in step ST26), the vacuum pump 49 is stopped. At the same time, timing by the timer TM is started (step ST27).

In step ST28, it is determined whether or not the time counted by the timer TM, that is, the time during which the vacuum pump 49 is stopped has elapsed for a certain time (for example, 12 seconds). When a certain time (12 seconds) has elapsed (YES in step ST28), driving of the vacuum pump 49 is started and the timer TM is reset (step ST29).
Then, the process returns to step ST26. When returning to step ST26, step ST26 executes a NO loop until step ST4 is executed in the control of FIG. 4, that is, until adsorption and desorption are switched.

In the control shown in FIG. 6, the first adsorption tower 33 is switched from the adsorption process to the desorption process, and the second adsorption tower 34 is switched from the desorption process to the adsorption process for a certain time (for example, 12 seconds). ), The vacuum pump 49 is stopped, and only the compression pump 19 is driven during that time.
While the vacuum pump 49 is stopped, only the compression pump 19 is driven, and only the negative pressure on the suction side of the compression pump 19 acts on the first adsorption tower 33 that has shifted to the desorption process. Only gasoline vapor having an amount and concentration corresponding to the negative pressure on the suction side of the compression pump 19 joins the recovery pipe 15 via the circulation pipe 48, the vacuum pump 49, the circulation pipe 48A, and the junction B1. Therefore, a large amount of high-concentration gasoline vapor is not sucked from the first adsorption tower 33.
Here, since a certain amount of gasoline vapor is desorbed from the first adsorption tower 33 due to the negative pressure on the suction side of the compression pump 19 until a predetermined time (12 seconds) elapses, a certain time elapses. Thereafter, even if the vacuum pump 49 is driven, a high concentration and a large amount of gasoline vapor is not discharged from the vacuum pump 49.

  In this way, by executing the control shown in FIG. 6, there is a disadvantage that the amount of gasoline vapor sucked by the compression pump 19 from the opening 17 of the oil supply nozzle 8 and sent to the agglomeration tank 20 is reduced. The inconvenience that the high concentration and large amount of gasoline vapor discharged from 49 flows back to the opening 17 side of the fuel supply nozzle 8 is prevented.

Next, the control for detecting a failure of the cooler 23 will be described with reference to FIG.
In FIG. 7, first, it is determined whether or not the power of the cooler 23 is turned on (step ST27). When the power is turned on (YES in step ST31), the recovery control unit 14 takes in an outside air temperature signal from the temperature sensor 29. (Step ST32).
Next, in step ST33, the collection control unit 14 sets a time during which the coolant 22 in the condensing tank 20 is cooled to a certain temperature or less based on the input outside air temperature signal. For example, the time is set to 60 minutes if the outside air temperature is 30 ° C., and 30 minutes if the outside air temperature is 20 ° C. At the same time, in step ST33, the timer TM starts measuring time.

In step S34, it is determined whether or not the time during which the coolant 22 is cooled, that is, the time measured by the timer TM has elapsed for a set time. When the cooling liquid 22 is cooled for a set time (YES in step ST34), the liquid temperature signal of the cooling liquid 22 measured by the temperature sensor 28 is input to the recovery control unit 14 (step ST35).
In step ST36, it is determined whether or not the measurement result of the temperature sensor 28 (the temperature of the coolant 22) is equal to or lower than a certain temperature (threshold value). If the liquid temperature of the coolant 22 is equal to or lower than the threshold value (YES in step ST36), it is determined that the cooler 23 is normally driven, and the process proceeds to step ST37.
In step ST37, it is determined whether or not the power is turned off. If the power is not turned off (NO in step ST37), the process returns to step ST35. On the other hand, if the power is turned off (YES in step ST37), the control is terminated.

In step ST36, if the coolant 22 does not fall below a certain temperature even after a lapse of a certain time since turning on the power (NO in step ST36), it is determined that the cooling system or the like has occurred, and the cooler 23 is stopped. Then, the alarm 52 is operated to notify the abnormality of the cooling system (step ST38).
Here, even if the cooling liquid 22 falls below a certain temperature (threshold) (step ST36 is YES), the liquid temperature of the cooling liquid 22 is the threshold while the step ST37 is executing the NO loop. If the temperature has risen above the value (NO in step ST36), the cooler 23 is stopped and the alarm 52 is activated (step ST38).

  According to the control of FIG. 7, an abnormality of the cooling system is notified, and by dealing with such an abnormality, there is a disadvantage that the gasoline vapor flows into the adsorption towers 33 and 34 without being condensed or liquefied in the condensing tank 22. Can be prevented. As a result, the amount of adsorption in the adsorption towers 33 and 34 abnormally increases, the adsorbent is saturated before the adsorption / desorption switching is performed, and the gasoline vapor is released from the exhaust pipe 44 into the atmosphere. Can be prevented.

Next, with reference to FIG. 8, the control for detecting an abnormality in the system including the adsorption tower (for example, the first adsorption tower 33) performing the adsorption process at the time of recovery of gasoline vapor will be described.
In FIG. 8, the collection control unit 14 determines whether or not a signal indicating that refueling is being performed, in other words, whether or not refueling is being performed (step ST41). If a signal indicating that refueling is in progress has been received (YES in step ST41), the compression pump 19 is driven and time measurement by the timer TM is started (step ST42).
Then, after the compression pump 19 is driven by the timer TM, the recovery pipe 15, the gas-liquid separation chamber 21, the air supply pipe 30, the adsorption tower 33 in the adsorption process, and the pressure in the exhaust pipe 44 are assumed to be stable for a certain period of time ( For example, it is determined whether or not 10 seconds have elapsed (step ST43).

When a certain time (for example, 10 seconds) elapses after the compression pump 19 is driven (YES in step ST43), a pressure signal indicating the measurement result of the pressure sensor 50 is input to the recovery control unit 14 (step ST44).
In step ST45, it is determined whether or not the pressure measured by the pressure sensor 50 is within a certain range, for example, 150 Kpa to 250 Kpa.
If the pressure measured by the pressure sensor 50 is within a certain range (150 Kpa to 250 Kpa) (YES in step ST45), it is determined that the pressure in the system including the first adsorption tower 33 is normal. And it returns to step ST41 and repeats the control of FIG.

On the other hand, if the pressure measured by the pressure sensor 50 is out of a certain range in step ST45 (NO in step ST45), for example, if the pressure is lower than 150 Kpa, the compression pump 19 is broken and the recovery pipe 15 is clogged. It is determined that other abnormalities occur and the pressure in the system including the first adsorption tower 33 is not increased. On the other hand, when the pressure measured by the force sensor 50 is higher than 250 Kpa, the pressure in the system including the first adsorption tower 33 is abnormally increased due to clogging of the adsorption tower 33 or the exhaust pipe 44. Judge that
In any case, the compression pump 19 is stopped, and the alarm 52 is notified of the abnormality (step ST46).

Next, FIG. 9 will be described, and control for detecting an abnormality in the system interposing the adsorption tower (for example, the adsorption tower 34) performing the desorption process will be described.
In FIG. 9, the recovery control unit 14 determines whether or not the vacuum pump 49 is driven (step ST51). If the vacuum pump 49 is driven (YES in step ST51), the time taken by the timer TM is measured. Start (step ST52).
Here, after driving the vacuum pump 49, the timer TM has passed a certain time (for example, 10 seconds) during which the pressure in the intake pipe 40, the adsorption tower 34 performing the desorption process, and the circulation pipe 48 is considered to be stable. In order to determine whether or not, time is measured.

In step ST53, it is determined whether or not the time counted by the timer TM has passed the fixed time (for example, 10 seconds). If the fixed time (10 seconds) has passed (YES in step ST53), the pressure sensor A pressure signal corresponding to the pressure measured at 51 is input to the recovery control unit 14 (step ST54).
In step ST55, it is determined whether or not the pressure measured by the pressure sensor 51 is within a certain range (for example, −10 Kpa to −50 Kpa). If the pressure measured by the pressure sensor 51 is a numerical value within a certain range (YES in step ST55), it is determined that the system interposing the adsorption tower 34 performing the desorption process is normal. And it returns to step ST51 and repeats the control of FIG.

In step ST55, if the pressure measured by the pressure sensor 51 is out of a certain range (for example, −10 Kpa to −50 Kpa) (NO in step ST55), for example, if the pressure is lower than −50 Kpa, the intake pipe 40 or the adsorption It is determined that the system including the adsorption tower 34 has been abnormally decompressed due to clogging of the tower 33 or the like.
On the other hand, if the pressure measured by the pressure sensor 51 is higher than −10 Kpa, it is determined that the system including the adsorption tower 34 cannot be decompressed due to a failure of the vacuum pump 49 or the like.
In any case, the vacuum pump 49 is stopped, and the alarm 52 notifies the abnormality (step ST56).

In the illustrated embodiment, the gasoline vapor of one refueling machine 3 may be processed by one vapor recovery apparatus 13, or the gasoline vapor of a plurality of refueling machines 3 is processed by one vapor recovery apparatus 13. You may do it.
When the vapors of a plurality of fuel dispensers 3 are processed by a single vapor collection device 13, signals are exchanged between the oil supply control unit 11 of each of the fuel dispensers 3 and the collection control unit 14 of the vapor collection device 3. It is necessary to control the driving of the compression pump 19 in accordance with the number of the refueling machines 3 that are refueling. Here, drive control can be easily performed by driving the compression pump 19 with an inverter motor (not shown).

Control of the drive of the compression pump 19 when the vapors of a plurality of fuel dispensers 3 are processed by a single vapor recovery device 13 will be mainly described with reference to FIG.
In FIG. 10, in step ST <b> 61, the recovery control unit 14 of the vapor recovery device 13 receives a signal indicating that fuel is being supplied from the fuel supply control unit 11 of each fuel dispenser 3. And the collection | recovery control part 14 judges whether the signal which shows that it is refueling is received only from the one fueling machine 3 (step ST62).

In step ST62, when a signal indicating that refueling is being performed from only one refueling machine 3 is received (step ST62 is YES), the compression pump 19 is driven with a normal capacity (step ST63).
On the other hand, when a signal indicating that refueling is being received from a plurality of fuel dispensers 3 (NO in step ST62 and YES in step ST64), the compression pump 19 is driven at a high speed (step ST65). .
If no signal indicating that refueling is being performed from any of the refueling machines 3 (NO in step ST62 and NO in step ST64), the process returns to step ST61.

Here, when the compression pump 19 is driven by an inverter motor (not shown), if the compression pump 19 is driven at a normal capacity in step ST63, the inverter motor is driven at a frequency of 50 Hz, for example.
On the other hand, if the compression pump 19 is driven at a high speed in step ST65, the inverter motor is driven at, for example, 70 Hz.
And the drive frequency of an inverter motor changes, and the capability of the compression pump 19 differs in step ST63 and step ST65.

  In this way, when the gasoline vapor of one refueling machine 3 is processed by one vapor recovery apparatus 13 and when the gasoline vapor of a plurality of refueling machines 3 is processed by one vapor recovery apparatus 13. By switching the output (or capacity) of the compression pump 19, it is possible to efficiently recover gasoline vapor that flows out from a fuel tank of an automobile (not shown) during refueling.

As shown in FIGS. 11 and 12, the fueling apparatuses 3 </ b> A and 3 </ b> B are capable of refueling gasoline of different oil types, that is, regular gasoline and high-octane gasoline, and gasoline vapor generated from a fuel tank of an automobile (not shown) is also regular. There are two types of gasoline vapor and high-octane gasoline vapor.
11 and 12, reference numeral 1R indicates a regular gasoline storage tank, and reference numeral 1H indicates a high-octane gasoline storage tank.

In the illustrated embodiment, as shown in FIG. 11, the regular gasoline vapor and the high-octane gasoline vapor are also collected by a single vapor collection device 13, and the collected gasoline vapor is a regular gasoline storage tank 1 </ b> R by a collection system RR. Or it can comprise so that it may return to the regular gasoline refueling system from oil storage tank 1R.
This is because even if the high-octane gasoline vapor is returned to the regular gasoline supply source side (oil storage tank 1R or regular gasoline refueling system), contamination problems do not occur.

However, as shown in FIG. 12, a regular gasoline dedicated vapor recovery device 13R and a high-octane gasoline dedicated vapor recovery device 13H may be provided.
In FIG. 12, the recovery system RR in the regular gasoline dedicated vapor recovery device 13R is returned to the regular gasoline storage tank 1R or the regular gasoline refueling system from the storage tank 1R, and the recovery system RH in the high-octane gasoline dedicated vapor recovery device 13H is The high-octane gasoline storage tank 1H or the high-octane gasoline supply system from the oil storage tank 1H is returned to.
Other configurations and operational effects of the vapor recovery apparatuses 13, 13R, and 13H in FIGS. 11 and 12 are the same as those in the embodiment described with reference to FIGS.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

The schematic diagram of the fueling station which installed the vapor collection | recovery apparatus of the fueling machine which concerns on this invention. The block diagram of 1st Embodiment of this invention. The block diagram which shows the apparatus which concerns on control of the vapor collection apparatus of a fueling machine. 6 is a flowchart of adsorption / desorption switching control in the first embodiment. The flowchart which shows the opening / closing control of the on-off valve in adsorption | suction / desorption switching of 1st Embodiment. The control flowchart of the vacuum pump in adsorption | suction / desorption switching of 1st Embodiment. The flowchart which shows the failure judgment control of the cooler in 1st Embodiment. The flowchart which shows the abnormality detection control of the system | strain which interposes the adsorption tower which is performing the adsorption | suction process in 1st Embodiment. The flowchart which shows the abnormality detection control of the system | strain which interposes the adsorption tower which is performing the desorption process in 1st Embodiment. The flowchart which shows the Kudo control of the compression pump in the case of having a plurality of fueling machines. The block diagram which shows the aspect which collect | recovers the vapor | steam of regular gasoline and the vapor | steam of high-octane gasoline by the same vapor collection | recovery apparatus. The block diagram which shows the aspect which collect | recovers the vapor | steam of regular gasoline, and the vapor | steam of high-octane gasoline, respectively by collect | recovering with an exclusive vapor collection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1R, 1H ... Oil storage tank 2 ... Oil supply pipe 3, 3A, 3B ... Oil supply machine 4, 16 ... Housing 5 ... Oil supply pump 6 ... Flow meter 7 ... Oil supply Hose 8 ... Refueling nozzle 9 ... Nozzle hook 10 ... Nozzle switch 11 ... Refueling control unit 12 ... Indicators 13, 13R, 13H ... Vapor recovery device 14 ... Recovery control unit 15 ... recovery pipe 17 ... opening 18 ... check valve 19 ... compression pump 20 ... condensing tank 21 ... gas-liquid separation chamber 22 ... cooling liquid 23 ... cooler 24 ... Drain pipe 25 ... Drain pipe 26, 27 ... Cock 28, 29 ... Temperature sensor 30 ... Air feed pipe 31,32,38,39,42,43,46,47 ... On-off valve 33, 34 ... Adsorption tower 35 ... Adsorbent 36 ... Cooling pipe 37 ... Cooling pump 0 ... intake pipe 41 ... stop 44 ... exhaust pipe 45 ... relief valve 48 ... circulating pipe 49 ... vacuum pump 50, 51 ... pressure sensor 52 ... alarm

Claims (6)

  An oil supply system and a gasoline vapor recovery system are provided, and the oil supply system includes an oil supply pipe having one end connected to an oil storage tank and the other end connected to an oil supply hose, and an oil supply pump and a flow meter interposed in the oil supply pipe. The gasoline vapor recovery system includes a vapor return pipe having one end opened in the vicinity of the fuel supply nozzle, and a condenser and an adsorption / desorption device interposed in the vapor return pipe. The condenser condenses water vapor and gasoline vapor. The adsorption / desorption device is provided on the downstream side of the condensing device, has the first or second adsorption tower filled with the adsorbent inside, and has a control device, The control device has a function of switching the first or second adsorption tower between an adsorption process for adsorbing gasoline vapor with an adsorbent and a desorption process for desorbing the adsorbent based on a measurement signal from the flow meter. It is characterized by Over path recovery system.   The controller includes an adsorption step of selectively connecting the gas-liquid separation chamber to the first or second adsorption tower to adsorb gasoline vapor to the adsorbent in the adsorption tower, and the first or second adsorption tower. All of the on-off valves interposed in the pipe connected to the adsorption tower when switching to the desorption process of selectively desorbing the gasoline vapor adsorbed by the adsorbent by being connected to the second pump The vapor recovery apparatus according to claim 1, wherein the vapor recovery device has a function of opening and closing and opening and closing the on-off valve after a predetermined time has elapsed.   The controller includes an adsorption step of selectively connecting the gas-liquid separation chamber to the first or second adsorption tower to adsorb gasoline vapor to the adsorbent in the adsorption tower, and the first or second adsorption tower. The second pump is stopped for a certain period of time when the switching to the desorption process of selectively connecting to the second pump and desorbing the gasoline vapor adsorbed by the adsorbent is performed. 3. The vapor recovery apparatus according to claim 1, which has a function of driving a second pump.   A pressure sensor is provided in the air supply pipe and the circulation pipe connected to the adsorption tower, and the control device stops the first and second pumps when the pressure measured by the pressure sensor is out of a certain range. The vapor recovery apparatus of any one of Claims 1-3 which has a function.   A temperature sensor for measuring the temperature of the cooling medium of the condensing device and a temperature sensor for measuring the outside air temperature are provided, and the control device is a time required for cooling the cooling medium based on the measurement result of the temperature sensor for measuring the outside air temperature. The cooling device for cooling the cooling medium is stopped if the temperature of the cooling medium after the necessary time elapses is higher than a threshold value. Item vapor recovery device.   The said fueling device is provided with two or more units | sets, The said control apparatus has a function which controls the capability of a said 1st pump based on the number of the fueling devices which are refueling. Item vapor recovery device.

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