JP2594204Y2 - Engine oil changer - Google Patents

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 to change the engine oil of an automobile.

[0002]

2. Description of the Related Art Conventionally, in an engine oil changer for an automobile, one end is extracted to a nozzle for both injection and injection in order to show customers that old oil extracted from the engine and new oil to be injected are not mixed. The ends were connected to the old oil extraction pipeline and the new oil injection pipeline inside the box, respectively.
A hose for extracting old oil and a hose for injecting new oil were independently provided outside the box.

[0003]

[Problems to be Solved by the Invention] However, in the initial stage of the used oil extracting process, the air in the used nozzle is also used until the used oil reaches the used oil extracting hose from the tip of the used oil sampling nozzle. Negative pressure is generated in the new oil injection hose because the air in the oil injection hose is sucked, and old oil enters the new oil injection hose by the negative pressure, and the old oil is drained. It remained after the end of the process, and the old oil and the new oil to be injected were mixed into the engine during the new oil injection process. In contrast, Japanese Patent Laid-Open No. 1-2
As disclosed in Japanese Patent No. 67198, there is known a hose in which a new oil injection hose is always filled with new oil to prevent intrusion of old oil, but in this case, the filled oil drips from a nozzle. When it is not full, it is necessary to send out new oil to the hose.However, the amount of delivery changes according to the length of the hose, and if this delivery amount is not managed, a measurement error will occur. There was a problem.

[0004] It is an object of the present invention to provide an engine oil changer which can solve the above-mentioned problems in the oil change extraction process.

[0005]

In order to achieve the above objects, the present invention provides a pump for extracting old oil, a pump for injecting new oil, a new oil measuring device for measuring the amount of new oil, and an old oil for measuring the amount of old oil. A hose for draining old oil, which has a weighing device inside the box and has one end connected to the nozzle for sampling and filling and the other end connected to the pipeline for draining old oil and the pipeline for new oil inside the box, respectively. And a new oil injection hose provided outside the box body, the old oil extraction hose and the new oil injection hose have a configuration in which they are connected to each other at a sampling and injection nozzle, and the old oil extraction During the extraction process of driving the pump for pumping, if it is detected based on the amount of old oil measured by the old oil metering device that air is being sucked from the nozzle for both sampling and injection, a predetermined amount is supplied to the hose for new oil injection. While letting out new oil A control means is provided for driving the pump for injecting new oil and then stopping the pump for extracting old oil when the old oil metering device detects a state in which air is sucked again from the combined nozzle for sampling and injection. It is the gist.

[0006]

According to the present invention, the old oil that has entered the new oil injection hose side due to the extraction of the old oil is suctioned at the end of the extraction process, and the air is sucked from the combined nozzle. By sending a predetermined amount of new oil to the new oil injection hose, it is pushed back to the old oil extraction hose side, and only new oil without old oil is injected into the engine during the new oil injection process for oil change. be able to. At this time, the new oil delivered to the new oil injection hose may be returned to the tank side by reversing the new oil injection pump unless it is necessary to inject the new oil thereafter.

Further, since the process from the start of the old oil extraction process to the extraction of old oil remaining in the hose for injecting new oil is fully automatic, the refueling staff can leave the place.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an overall configuration diagram of an engine oil changing device according to an embodiment of the present invention. In a box 1, a new oil can 2 for storing new oil for injection and a collected old oil are used. The waste oil cans 3 to be stored are disposed on a new oil measuring device 4 such as a load cell and an old oil measuring device 5, respectively.
And the other end is connected to a new oil injection hose 8 outside the box 1 via a new oil injection pump 6 and a valve 7 that can be driven forward and reverse, and the tip of the hose 8 is withdrawn and injected. Combined nozzle 9
A new oil injection pipe line 10 fitted with an oil pump, and one end opened into the waste oil can 3 and the other end pumped out of the box 1 via a used oil extraction pump 11 and a valve 12 that can be driven forward and reverse. Hose 13
At the tip of the hose 13, similarly to the hose 8 for new oil injection, a pipe 14 for extracting old oil to which the nozzle 9 was attached was piped.

Further, an operation panel 15 is provided above the box 1, and the operation panel 15 has switches for setting a preset amount, starting drainage of old oil, starting injection of new oil, automatic operation, etc. An indicator for displaying the amount, etc. was provided.

Output signals from the new oil measuring device 4, the old oil measuring device 5, and the switches are introduced into a control device using a conventionally known microcomputer provided in the box 1 for control. The signals are output to the valves 7 and 12, the new oil injection pump 6, the old oil removal pump 11, and the display.

FIGS. 2 to 7 are sectional views of a hose 8 for new oil injection, a hose 13 for draining old oil, and a nozzle 9 for both sampling and injection. FIG. 2 shows the initial stage of the draining process of old oil, and FIG. In the middle stage of the process, FIG. 4 shows the last stage of the old oil extraction process, FIG. 5 shows the first stage of the final stage of the old oil extraction process, and FIG.
FIG. 7 is a diagram showing the movement of old oil, new oil, and air in the third stage at the end of the old oil extracting process, in which 16 is an oil pan of a car, hatched portion 17 is old oil, and arrow 18 Indicates the flow of old oil, arrow 19 indicates the flow of air, hatched portion 20 indicates the flow of new oil, and arrow 21 indicates the flow of new oil.

FIG. 8 is a flowchart showing the operation of the used oil extracting process of the engine oil changing apparatus according to the embodiment of the present invention.

The operation of the embodiment will be described below with reference to FIGS.

First, the nozzle 9 is inserted into the oil pan 16 of the automobile, and as shown in FIG.
Press the extraction switch in 5 (step 1). Then, the valve 12 is opened, and the used oil extracting pump 11 is driven to rotate forward to start the so-called used oil extracting operation (step 2). At this time, as shown in FIG.
7 intrudes into the sampling and injection nozzle 9 (arrow 18), but until the used oil 17 reaches the used oil extraction hose 13, the air in the new oil injection hose 8 also uses the used oil extraction hose. 13 (arrow 19), the new oil injection line 1
Since the valve 7 interposed in the middle is closed, a negative pressure is generated in the hose 8 for injecting new oil, and as shown in FIG. It is sucked into the new oil injection hose 8 by the amount (arrow 18). Eventually, as shown in FIG. 4, at the end of the used oil extracting process, air is drawn into the used oil extracting hose 13 from the tip of the sampling and injection nozzle 9 (arrow 19), and the used oil measuring device is used. The weight W1 of No. 5 does not change for a certain period of time (step 3). Conventionally, the old oil extracting step is completed at this point and the process is shifted to the new oil injection step. At this time, the old oil 17 in the new oil injection hose 8 still remains.

Therefore, in the present invention, the old oil extracting operation is continued after this, the valve 7 is opened, the new oil injection pump 6 is driven forward, and the so-called new oil injection operation is performed (step 4). As shown in FIG. 5, the new oil 20 in the new oil can 2 is injected into the new oil injection hose 8 via the new oil injection pipe 10 (arrow 21). Then, the air in the new oil injection hose 8 is pushed (arrow 19), and the remaining old oil 17 also moves from the new oil injection hose 8 to the old oil extraction hose 13 (arrow 18).

Next, as shown in FIG. 6, the injection amount of the new oil 20 is sufficient for the old oil 17 in the new oil injection hose 8 to escape, and the sampling and injection nozzle 9 and the old oil When the amount reaches a range that does not enter the oil draining hose 13, that is, the new oil amount W2 measured by the new oil measuring device 4.
However, when the new oil amount W3 is obtained by subtracting the injection amount (step 5), the new oil injection pump 6 is stopped (step 6). However, at this point, the old oil 17 still remains in the middle of the old oil extraction pipeline 14, so that
The old oil draining operation is continuing.

Further, as shown in FIG. 7, when all of the used oil 17 is collected in the waste oil can 3, and the used oil amount W1 measured by the used oil measuring device 5 does not change for a certain period of time (step 7),
The valve 12 is closed, the old oil extraction pump 11 is stopped, and the new oil injection pump 6 is driven in reverse (step 8), and the new oil 20 in the new oil injection pipe 10 and the new oil injection hose 8 is discharged. Start collecting in the new oil can 2. When there is no change in the new oil amount W2 measured by the new oil measuring device 4 for a certain period of time (step 9), the valve 7 is closed, the pump 6 for new oil injection is stopped (step 10), and the old oil extracting operation is performed. All processes are completed, and the process shifts to the original new oil injection process.

The present invention is limited to the case where the old oil extracting process is used alone. However, it is natural that the present invention can be incorporated in an automatic course in which the conventional old oil extracting process and the new oil filling process are continuously performed. In addition, even when there are a plurality of new oil cans 2, the present invention can be implemented by applying the control of the present invention to one kind of new oil.

[0020]

[Effects of the Invention] As described above, in the present invention, old oil that has entered the new oil injection hose side due to the extraction of old oil is drawn at the end of the extraction process, and the air is sucked from the combined nozzle. Under this condition, a predetermined amount of new oil is delivered to the new oil injection hose, and pushed back to the old oil extraction hose side.At the time of the new oil injection process for oil change, only new oil without old oil is mixed into the engine. The new oil and old oil can be completely exchanged, which is the original function of the engine oil changer, and impurities that adversely affect the engine, such as abrasion powder and carbon contained in old oil, can be re-injected into the engine. It will not be returned inside. This also eliminates the need to previously fill the new oil injecting hose, there is no inconvenience of oil dripping from the nozzle, and there is no problem that erroneous metering is caused even if the length of the hose is changed. In addition, since the process from the start of the extraction process to the removal of old oil remaining in the new oil hose was fully automatic, the refueling staff was able to leave the place and perform other operations such as refueling gasoline and kerosene during the oil change operation. Can be performed in parallel, reducing the waiting time of the customer and improving the work efficiency.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a front side of an engine oil changing device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a hose for new oil injection, a hose for draining old oil, and a nozzle for both sampling and injection of the same device, showing the movement of old oil, new oil, and air in the early stage of the old oil draining process. .

FIG. 3 is a sectional view of the same device as in FIG. 2, showing movements of old oil, new oil, and air in the middle of the old oil extracting process.

FIG. 4 is a cross-sectional view of the same device as in FIG. 2, showing the movement of old oil, new oil, and air at the end of the old oil extracting process.

FIG. 5 is a cross-sectional view of the same device as in FIG. 2, showing the movement of old oil, new oil, and air in the first stage at the end of the old oil extracting process.

FIG. 6 is a sectional view of the same device as that of FIG. 2, showing the movement of old oil, new oil, and air in the second stage of the end of the old oil extracting process.

FIG. 7 is a sectional view of the same device as in FIG. 2, showing the movement of old oil, new oil, and air in the third stage at the end of the old oil extracting process.

FIG. 8 is a flowchart showing an extraction process operation of the apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Box 4 New oil metering device 5 Old oil metering device 6 New oil injection pump 8 New oil injection hose 9 Extraction and injection nozzle 10 New oil injection pipeline 11 Old oil extraction pump 13 Old oil extraction hose 14 Pipe for draining old oil

Claims (1)

(57) [Scope of request for utility model registration] 1. A box for installing an old oil extracting pump, a new oil injecting pump, a new oil measuring device for measuring the amount of new oil, and an old oil measuring device for measuring the amount of old oil, and extracting one end of the box. An old oil extraction hose and a new oil injection hose with the other end connected to the old oil extraction pipe and the new oil injection pipe inside the box, respectively, were provided outside the box. Hose for draining old oil and injecting new oil in engine oil changer
Hose is connected to each other at the sampling nozzle
And the old oil drainage pump is driven.
Air during the sampling process.
Used oil that uses an old oil measuring device to measure that
When the amount is detected based on the amount, the specified amount is
The new oil injection pump is driven only while the new oil is sent out,
After this, the old oil metering device is again used to extract
When detecting the state of sucking air, the old oil removal pump
An engine oil changing device provided with control means for controlling so as to stop the engine oil.