JPH06179493A - Engine oil replacement device - Google Patents

Abstract

PURPOSE:To certainly prevent oils from mixing without error in oil filling amount in the case two or more sorts of oils are fed by using an oil filling nozzle, pipe lines, pumps and others in common. CONSTITUTION:A controller is provided to control an oil replacement in the following manner. A waste oil pump 18 is put is operation in response to a waste oil draining signal from a key board, and the measured amount of a load cell 9 as a weighing device is displayed on a display as the drained amount. On receipt of oil sort selection and oil filling signals from the key board, changeover valves 22a and 22b are switched and a fresh oil pump 24 is driven forward. Then, after the amount of fresh oil in a pipe line is measured, the measured amount of the load cell 9 is displayed on the display as an oil filled amount. The fresh oil pump 24 is reversed in response to a oil filling completing signal from the key board to return the fresh oil remaining in the pipe line to fresh oil tanks 4-6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device installed in a gasoline filling station or the like for changing engine oil of an automobile.

[0002]

2. Description of the Related Art There is a system in which a plurality of engine oils can be supplied with one device, but one of the oil supply nozzles, pumps, and part of the oil supply pipes in the device is also shared. There is something. In such a device, a switching valve is provided in the middle of the pipe, and a selection signal from the oil type selection switch causes
The switching valve is switched to the tank side of the selected oil type, and a flow path is formed between the tank and the oil supply nozzle of the oil supply pipe.

Then, the pump is rotated in the normal direction, the nozzle valve is opened, and oil is supplied from the tank of the desired oil type to the oil tank of the automobile through the pipe and the oil supply nozzle. After refueling a predetermined amount, the pump is stopped, the refueling nozzle is closed, and refueling ends.

[0004]

At the end of refueling, oil of the refueled oil type remains in the refueling nozzle, pump, and piping. Therefore, if you use the same refueling nozzle, pump, or part of the piping to refuel another oil type, the last oil type remaining in the piping due to the last refueling will be refueled this time. It mixes at the start, and mixed oil is generated.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, and when oil of a plurality of oil types is supplied by sharing the oil supply nozzle, pump, piping, etc., it is possible to surely prevent oil mixture. Moreover, it is therefore an object of the present invention to provide an engine oil changer that does not cause an error in the amount of oil supplied.

[0006]

In order to achieve the above object, the present invention comprises one weighing means for measuring the weight of one waste oil tank and a plurality of new oil tanks, a pipe inserted in the waste oil tank and a waste oil pump. And a pipe inserted into a new oil tank and connected via a switching valve and a new oil pump, a discharge / refueling nozzle, an indicator for displaying the withdrawal amount and the refueling amount, a keyboard having an operation switch, and A control device for controlling devices such as a pump, a switching valve, and a display meter is provided, and the control device drives the waste oil pump in response to a waste oil extraction signal from the keyboard, and the measured amount by the weighing means is displayed on the display device as the extracted amount. The new valve is displayed, the switching valve is switched by the oil type selection and refueling signal from the keyboard, the new oil pump is driven in the forward direction, and the amount of new oil filling the pipe is measured. Displayed on the display meter as oil quantity, it is an summarized in that a new oil in the pipe by reversing the new oil pump by fueling completion signal from the keyboard and controls to return the new oil tank.

[0007]

According to the present invention as set forth in claim 1, the inside of the pipe can be emptied by returning the new oil in the pipe to the new oil tank at the end of refueling. Seed new oil is not mixed. Since the amount of oil filling the empty pipe at the start of refueling is not displayed as the amount of refueling, there is no error in the amount of refueling and no trouble to the customer.

According to the second aspect of the present invention, when the new oil in the pipe is returned to the new oil tank, the vacuum breaker can surely empty the inside of the pipe to return the new oil.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a piping diagram showing an embodiment of an engine oil changing device of the present invention, FIG. 2 is a vertical sectional front view of the same device, and FIG.
4 is a transverse plan view of the same as above, and FIG. 4 is a perspective view of the same. In the drawing, 1 shows a cylindrical main body case, the main body case 1 is provided with four casters 2 at its lower part, and one is provided at the lower part of the main body case 1. A waste oil tank 3 and a plurality of new oil tanks 4, 5 and 6 having different oil types are arranged in a rectangular shape.

In this case, the tanks 3, 4, 5 and 6 are
The total weight of the tanks 3, 4, 5 and 6 is hung from one load cell 9 as a weighing means which is placed on a support rod 8a which is hung between the columns 7 and 7 which are erected on the side surface in the case 1. Are added to the load cell 9.

Mechanisms such as valves and pumps for controlling oil drainage and oil supply, which are positioned above the tanks 3, 4, 5, 6 and on the support rod 8b supported by the support columns 7, and these valves and pumps A control device 10 for controlling the above is provided, and an indicator 11 and a keyboard 12 connected to the control device 10 are provided on the upper front surface of the case 1. Reference numeral 42 in the figure is a power plug.

As shown in FIG. 5, the display 11 displays the amount of oil removed, the amount of oil supplied, etc. It has display portions 11a and 11b, and the keyboard 12 is an operation switch and an extraction switch.
43, oil supply switch 44, fully automatic switch 45, oil type selection switch 46, oil supply amount setting switch 47, idle time setting switch 48, start switch 49, end switch 50, waste oil discharge switch 51, etc., and extraction lamp 43
a, a refueling lamp 44a is provided.

Then, on the upper side surface of the case 1, there are provided pipes connected to the tanks 3, 4, 5 and 6 through the mechanism such as the valve and the pump. As shown in FIG. 1, one of the pipes is connected to the waste oil tank 3, and a drain pipe 16a that opens upward in the waste oil tank 3 and a drain pipe 16b that opens at the bottom in the waste oil tank 3 are provided. Extraction pipe 16 via switching valve 17
The extraction pipe 16 was provided with a forward / reverse pump 18, connected to the extraction hose 14 via a solenoid valve 19, and the extraction / refueling nozzle 13 was attached to the tip of the extraction hose 14. In the figure
Reference numeral 20 is a relief valve provided in the forward / reverse pump 18, and 52 is a vacuum sensor.

On the other hand, the oil supply pipes 21a, 21b, 21c are opened in the new oil tanks 4, 5, 6 respectively, and the oil supply pipes 21a, 21b are connected to the oil supply pipe 23 via the switching valves 22a, 22b. twenty one
c is connected to the oil supply pipe 23 via the switching valve 22b, and the oil supply pipe 23
Forward and reverse pumps 24 are installed in the solenoid valves 26a, 26b, 26, respectively.
It is connected to refueling hoses 27a, 27b, 27c via c, and a common refueling nozzle 28 is provided at the tips of these refueling hoses 27a to 27c. Reference numeral 25 in the drawing denotes a relief valve provided in the forward / reverse pump 24.

Further, the oil supply pipe 23 is connected to the oil supply hose 15 as another oil supply flow path via a valve 29, and the extraction and oil supply nozzle 13 is connected to the tip of the oil supply hose 15, and the extraction and oil supply nozzle 13 is connected.
A vacuum breaker 32 is provided in the vicinity of. This vacuum breaker 32 is a check valve provided in the middle of the refueling hose 15.
33 and an atmosphere opening pipe 34 communicating with the upstream side of the check valve 33. The check valve is provided in the middle of the atmosphere opening pipe 34.
39 was provided and a filter 40 was attached to the open end.

Then, these refueling hoses 15, 27a to 27
c is provided on the upper part of one side surface of the main body case 1, and the refueling hose 15 and the extraction hose 14 are lifted up while being supported by the hose support rod 31 standing upright from the upper side surface of the case 1.

A transparent cover 35 having a semicircular cross section is provided on the upper end of the main body case 1, and a waste oil display is provided in the transparent cover 35.
Arranged 36. The waste oil display 36 has a transparent cylindrical container 36a which is opened upward in the middle of the extraction pipe 16a on the pump 18 side and which is covered with an opaque cap 36b. A drain pipe 16a on the side of the waste oil tank 3 opens at the bottom of the.

Inside the transparent cover 35, indicator lamps 37a, 37b are arranged at both sides of the waste oil display 36 to indicate that the waste oil is being drained, new oil is being fed, and the operation is finished. For example, one of the revealing lamps is configured such that one is blue to indicate refueling, the other is red to indicate that the fuel is being extracted, and both are blinked at the end of the work.

Illumination lamps 38a and 38b are attached to both sides of the upper part of the main body case 1. One of these lamps
38a is detachably attached from the case 1.

Reference numeral 41 in the drawing denotes a handle provided on the outer peripheral surface of the center of the main body case 1, which is formed in a ring shape so as to surround the outer periphery of the case 1.

Next, usage and operation will be described. In order to change the engine oil of the automobile, first, the main body case 1 is moved to a place where it is easy to work, and the power plug 42 is inserted into a power socket (not shown). Tore 41 when moving
Hold and pull the body case 1 in the desired direction, and the case 1 can be easily moved by the casters 2. And the handle 41
Since it is formed in a ring shape, it can be held on any side of the case 1. Also, since the case 1 is formed in a cylindrical shape, there is no angular protrusion and there is a possibility that it may be caught by another object during movement. Without, it can be moved smoothly.

The present invention can be carried out by selecting one of the operations of oil exchange, only refueling, and only withdrawal with one device. First, the flow of this entire operation will be described with reference to the flowchart of FIG. Select the desired oil type with the oil type selection switch 46 on the keyboard 12 (Step I, B,
C) The previous display of the amount of oil supply, the amount of oil withdrawal, etc., displayed on the indicator 11 is reset to zero (step d).

Next, as a work selection, the fully automatic switch 45 is used to change the oil, and the oil supply switch is used to only refuel.
44, to remove only, press the eject switch 43 (step E, F, G), then start switch
Press 49 (step, re, n).

As a result, the flow of each work is started, and in the case of oil exchange, the oil removal flow is followed by the refueling flow (A) (step, w), and when the refueling is completed and the end switch 50 is pressed. (Stepwa), the oil return flow to return the new oil in the pipe to the tank (Step). When only refueling, the refueling flow (B) is performed, and when the end switch 50 is pressed after the refueling is completed, the oil return flow is performed (step, wa, power). If only sampling is performed, the sampling flow will be used (step yo).

Explaining the extracting operation with reference to FIG. 7, the load cell 9 constantly detects the total weight of the tanks 3, 4, 5, and 6, and when the start switch 49 is pressed,
At the same time as storing the weight W ₁ at this time, the switching valve 17 is switched to the extraction pipe 16a side, the solenoid valve 19 is opened, the pump 18 is driven, and the extracting lamp 43a and the revealing lamp 37b blink (step step). .

The waste oil extracted from the oil pan of the automobile by the oil supply / nozzle nozzle 13 is taken out by a hose 14 and an extraction pipe 16.
Enter the waste oil display 36 via a. In the waste oil display 36, the waste oil ejected from the extraction pipe 16a is cap 36b.
Then, it flows down in the transparent container 36a. Therefore, if you look at the waste oil that flows down, you can tell at a glance how dirty it is. container
The waste oil in 36a enters the waste oil tank 3 through the extraction pipe 16a opened at the bottom of the container 36a.

The load cell 9 detects the total weight of the tanks 3, 4, 5 and 6 even during the draining of the waste oil, and the control device 10 subtracts the weight W ₁ detected at the start of the draining from the current weight W. It is converted into liters and displayed on the display unit 11b as the amount to be withdrawn (steps).

While the oil in the oil pan is being sucked up, the vacuum sensor 52 is in the on state (steps).
, When the oil is almost exhausted and air begins to be sucked, the vacuum sensor is turned off and the timer is set (steps, ne), and the off state of the vacuum sensor is kept for a certain time, for example, 10
If it continues for a second (step), it is judged that the draining of the waste oil is completely finished, the switching valve 17 and the solenoid valve 19 are returned to the original state, the pump 18 is stopped, and the draining lamps 43a and 37b are turned off ( Stepum). When the oil is sucked again, the vacuum sensor 52 is turned on and the timer is reset (steps, n).

The refueling operation will now be described with reference to the flow chart of FIG. 8. When the extraction flow is completed, the total weight W _{1 of the} tanks 3, 4, 5, 6 detected by the load cell 9 at the start is stored. At the same time, valve 29 opens and the switching valve
22a, 22b is switched to one of the tanks 4, 5 and 6 of the oil type selected by the selection switch 46, and the oil supply pipes 21a to 21c
Any one of, the oil supply pipe 23, the oil supply hose 15, and the withdrawal and oil supply nozzle 13 to form an oil supply flow path, and the pump 24 normally rotates,
The refueling lamp 43b and the revealing lamp 37a are turned on (step C).

Then, for example, the oil pumped up from the tank 4 by the pump 24 passes through the empty oil supply pipe 23 and the oil supply hose 15 and reaches the extraction and oil supply nozzle 13. During this period, the detection of the total weight of the tanks 4, 5, 6 by the load cell 9 continues, and the current total weight W after the start of refueling is a value obtained by subtracting _a predetermined weight W _a, for example, 500 g from the total weight W ₁ at the start. Then, (step no), it is determined that the empty oil supply pipe 23 and the oil supply hose 15 are filled with oil. The predetermined weight W _a is preset as a weight that fills the empty oil supply pipe 23 and the oil supply hose 15.

In this way, the empty refueling pipe 23 and refueling hose
After filling the inside of 15 with oil, the weight W measured by the load cell 9 is displayed as the refueling amount on the display 11 (step E), and if the refueling amount becomes the same as the extracted amount (step),
The display of the amount of refueling displayed on the indicator 11 is fixed, the pump 24 is stopped at the same time, the valve 29 is closed, and the refueling lamps 43b, 37
a goes out (step YA).

Finally, when the end switch 50 is pressed, the oil return flow is executed (Fig. 6, stepper,
F). In the oil return flow, as shown in the flowchart of FIG. 9, the valve 29 is opened and the pump 24 is rotated in the reverse direction (step), and the oil supply pipe
23, when a predetermined time, for example, 5 seconds, has elapsed as the time for all the oil in the fuel supply hose 15 to return to the tank 4 (step K), the pump 24 is stopped, the valve 29 is closed, and the switching valves 22a and 22b are closed. Return to the original state (Stephu).

When the oil in the refueling hose 15 is returned to the tank 4, air is taken into the refueling hose 15 from the atmosphere opening pipe 34 via the check valve 39, and the residual oil in the refueling hose 15 and the refueling pipe 23 is removed. Be sure to return to tank 4. At this time, since the filter 40 is attached to the open end of the atmosphere open pipe 34, dust in the atmosphere does not enter the tank 4.

Next, the refueling operation in the case of refueling only will be described with reference to the flowchart of FIG.
When is turned on, the tank 3, which is detected by the load cell 9,
At the same time as the total weight W ₁ of the start time of 4, 5, 6 is stored, the switching valves 22a, 22b are switched to one of the tanks 4, 5, 6 of the oil type selected by the selection switch 46, and The valves 26a, 26b and 26c of the selected oil type are opened. as a result,
Any of the oil supply pipes 21a to 21c and the oil supply hoses 27a to 27c,
A refueling flow path is formed between the refueling nozzle and the refueling nozzle, the pump 24 rotates in the normal direction, and the in-refueling lamp 43b and the revealing lamp 37a are turned on (step C).

Then, for example, the oil pumped from the tank 4 by the pump 24 fills the empty oil supply pipe 23. During this time, the tanks 4, 5 by the load cell 9
The detection of the total weight of 6 continues, and the current total weight W after the start of refueling is from the total weight W ₁ at the start to a predetermined weight W _b, for example 200
When the value obtained by subtracting g is reached (step d), the empty oil supply pipe 2
Judge that 3 is filled with oil. The predetermined weight _Wb is preset as a weight that fills the empty oil supply pipe 23.

In this way, the weight W measured by the load cell 9 after filling the empty oil supply pipe 23 with oil is displayed on the display unit 11 as the amount of oil supply (step T), and when the oil supply is completed, the nozzle valve is turned on. Close and press the end switch 50 (stepper). As a result, the valves 26a, 26b, 26c are closed and the indication of the amount of refueling displayed on the indicator 11 is fixed, the pump 24 is stopped at the same time, and the refueling lamps 43b, 37a are turned off (step key). Then, the oil return flow of FIG. 9 is executed.

After refueling in this way, the oil in the hose or pipe is stored in the tank 4 containing the oil of the oil type.
Since all the refueling operations are completed by returning to 5 and 6 and emptying the hoses and pipes, even if the same refueling hose 15 and refueling pipe 23 are used next time to refuel different oil types, The oil for refueling is not mixed.

Further, since the amount of liquid filling the empty oil supply pipe 23 or the like at the start of refueling is not displayed on the display unit 11 as the amount of refueling, the customer is not inconvenienced.

When the waste oil tank 3 is full, the oil supply nozzle 13 is removed, and the waste oil discharge switch 51 is pressed with the keyboard 12, the switching valve 17 is switched to the extraction pipe 16b side, the solenoid valve 19 is opened, and the pump 18 is reversed and the waste oil in the waste oil tank 3 is discharged through the extraction pipe 16b and the extraction hose 14.

[0040]

As described above, according to the engine oil exchanging device of the present invention, when a plurality of oils of different oil types are replenished by sharing the refueling nozzle, the pump, the pipe, etc., the oil remains in the pipe after the end of refueling. Since the existing oil is returned to the tank and the inside of the pipe is emptied, it is possible to reliably prevent mixing of oil, and the amount of oil that fills the inside of the pipe at the start of refueling is not displayed as the amount of oil supply. There is no error and the actual refueling amount does not become less than the displayed refueling amount.

[Brief description of drawings]

FIG. 1 is a piping diagram showing an embodiment of an engine oil changer of the present invention.

FIG. 2 is a vertical cross-sectional front view showing an embodiment of the engine oil changer of the present invention.

FIG. 3 is a cross-sectional plan view showing an embodiment of the engine oil changer of the present invention.

FIG. 4 is a perspective view showing an embodiment of an engine oil changer of the present invention.

FIG. 5 is a front view of the indicator and keyboard portions showing an embodiment of the engine oil changer of the present invention.

FIG. 6 is a flowchart showing the overall operation of the engine oil changer of the present invention.

FIG. 7 is a flowchart showing a withdrawal operation of the engine oil changer of the present invention.

FIG. 8 is a flowchart showing an oil supply operation of the engine oil changer of the present invention.

FIG. 9 is a flowchart showing an oil return operation of the engine oil changer of the present invention.

FIG. 10 is a flowchart showing a refueling operation only for refueling of the engine oil changer of the present invention.

[Explanation of symbols]

1 ... Main body case 2 ... Caster 3 ... Waste oil tank 4, 5, 6 ... New oil tank 7 ... Struts 8a, 8b ... Support rod 9 ... Load cell 10 ... Control device 11 ... Display 11a, 11b ... Display 12 ... Keyboard 13 … Extraction and oil supply nozzle 14… Extraction hose 15… Oil supply hose 16, 16a, 16b… Extraction pipe 17… Switching valve 18… Forward / reverse pump 19… Solenoid valve 20… Relief valve 21a, 21b, 21c… Oil supply pipe 22a, 22b… Switching valve 23 ... Oil supply pipe 24 ... Forward / reverse pump 25 ... Relief valves 26a, 26b, 26c ...
Solenoid valves 27a, 27b, 27c ... Refueling hose 28 ... Refueling nozzle 29 ... Valve 31 ... Hose support rod 32 ... Vacuum breaker 33 ... Check valve 34 ... Atmosphere opening pipe 35 ... Transparent cover 36 ... Waste oil display 36a ... Container 36b ... Cap 37a, 37b ... Revelation lamp 38a, 38b ... Illumination lamp 39 ... Check valve 40 ... Filter 41 ... Handle 42 ... Power plug 43 ... Extraction switch 43a ... Extraction lamp 43b ... Refueling lamp 44 ... Refueling switch 45 ... Fully automatic switch 46 ... Oil type selection switch 47 ... Lubrication amount setting switch 48 ... Idle time setting switch 49 ... Start switch 50 ... End switch 51 ... Waste oil discharge switch 52 ... Vacuum sensor

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Fumihisa Uemura 2-12-13 Shibaura, Minato-ku, Tokyo Tatsuno Mechatronics Co., Ltd. (72) Yasuyuki Negishi 2-12-13 Shibaura, Minato-ku, Tokyo Tatsuno Mechatronics Co., Ltd. (72) Inventor Shinji Sanru 2-12-13 Shibaura, Minato-ku, Tokyo Tatsuno Mechatronics Co., Ltd.

Claims (2)

[Claims] 1. A weighing means for measuring the weight of one waste oil tank and a plurality of new oil tanks, and a pipe inserted into the waste oil tank and connected via a waste oil pump and switched to a pipe inserted into the new oil tank. Valve and a new oil pump to connect with a draining and oiling nozzle, an indicator that displays the withdrawal amount and the oiling amount, a keyboard that has an operation switch, and a control that controls the pump, switching valve, indicator, and other devices. The control device drives a waste oil pump in response to a waste oil removal signal from the keyboard, displays the amount measured by the weighing means as an extracted amount on the display, and switches the oil type selection and refueling signal from the keyboard. After switching the valve and driving the new oil pump in the normal direction, after measuring the amount of new oil filling the pipe, the measured amount of the weighing means is displayed as the amount of oil on the indicator and the oil is supplied from the keyboard. An engine oil changer characterized in that the new oil pump is rotated in reverse by a termination signal to control the new oil in the pipe to return to the new oil tank. 2. The engine oil changer according to claim 1, wherein a vacuum breaker is attached to the extraction and oil supply nozzle.