JPH0696972B2 - Oil changer - Google Patents

Description

Description: [Industrial application] The present invention mainly relates to a device for exchanging engine oil or torque converter oil of an automobile.

BACKGROUND OF THE INVENTION Conventionally, as an apparatus of this type, as shown in JP-A-53-143839 and JP-B-54-17104, extraction of old oil and filling of a predetermined amount of new oil are continuously performed. There is known a device configured so that it can be carried out.

By the way, when changing oil, you want to change the oil but want to fill it with special oil so that you only want to extract it with a machine, or you do not need to change it but you want to replenish it with a specific amount because the amount of oil is small. There is a case. In such a case, even with the conventional device as described above, it is possible to independently perform the extracting work and the filling work, but the operation is performed such that the extracting means and the filling means are treated so as not to be interlocked, and then each is operated independently. However, there is an inconvenience that it is difficult for an unfamiliar worker to use it. Further, the conventional device as described above has a drawback that it requires a pump for oil extraction and a pump for filling oil, resulting in a large and expensive device.

[Object of the Invention] The present invention has an automatic operation of automatically measuring the extracted old oil and continuously filling the same amount of new oil as the extracted amount, and a withdrawal operation of only extracting the old oil. It is an object of the present invention to provide a device capable of solving the above-mentioned problems by making it possible to perform a filling operation of only filling new oil with only one input operation on the control panel using one pump.

[Examples] Specific examples will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. 1
Is an oil changer main body, and a nozzle 3 for both extraction and filling is provided on the outside through a hose 2. Nozzle 3
Is formed of a pipe material having a thickness that can be inserted into holes for oil gates in various parts of an automobile. A float switch 4 is a float 5 in which a magnet is built in the chamber so that the float 5 can be moved up and down, and the float 5 is operated depending on the presence or absence of oil in the chamber. , Functions as a means for determining whether the fluid in the pipeline is air or oil. 7 is a pump,
It consists of a positive and negative rotation positive displacement pump, which drains oil during normal rotation and fills oil during reverse rotation. Reference numeral 8 is a flow meter, which outputs a signal for each unit flow rate of oil to be extracted and filled, and is of a type that can measure both forward rotation and reverse rotation. Reference numeral 9 is a solenoid valve for switching a 3-port flow passage, which is provided with an oil pipe line connecting the pump and the like.
Operates to communicate with either the waste oil tank 10 side (port P ₁ ) or the new oil tank 11 side (port P ₂ ).

A control panel 20 is provided on the front surface of the main body 1 and includes an operation switch panel 21, a display panel 22 and an alarm output section 23. Switch panel 21 includes selection switch 24, start switch 25, stop switch 26,
A reset switch 27, a power switch 28, and a preset input key set 29 are provided. The selection switch 24
"Automatic" switch 24 for continuous oil removal and filling
-1 and the "drain" switch that only drains oil 24-
2 and "Fill" switch 24-3 that only fills oil
And any one of them can be arbitrarily selected, and each switch is provided with an indicator light that lights up in response to a selection operation. Therefore, when the power switch 28 is ON, if the selection switch 24 selects an operation and the start switch 25 is pressed, the selected operation is started, and if the work stop switch 26 is pressed, the operation can be arbitrarily interrupted. it can. Further, when the reset switch 27 is pressed after the operation is completed, the data such as the oil measurement value is cleared and a new operation can be performed. The above-mentioned operation of "pulling" or "filling" can be controlled according to a preset amount, and the amount set and preset in the preset input key set 29 is automatically extracted and filled.

The display panel 22 is provided with a filling amount indicator 30, a withdrawal amount indicator 31, and a process indicator lamp 32. Sampling amount indicator 31
Is also used for displaying the preset amount when it is not operated, and the display distinction is displayed by the indicator lamp 33. The process display lamp 32 illuminates and displays whether the operation being executed is “extraction” or “filling”.

A control unit 40 drives the pump 7, the solenoid valve 9, the display panel 22 and the alarm output unit 23 according to a program in response to signals from the float switch 4, the flow meter 8 and the switch panel 21. Reference numeral 41 denotes a pump drive circuit, which drives / stops the pump 7 and switches between normal rotation / reverse rotation. Reference numeral 42 is a solenoid valve drive circuit for switching the solenoid valve 9. A display drive circuit 43 controls the display of each part of the display panel 22. 44
Is an alarm drive circuit that outputs an alarm. Reference numeral 45 denotes a microcomputer, which exchanges signals with each unit via the interface circuit 46 and includes a CPU 47 / ROM 48 and a RAM 49.

FIGS. 2, 3 and 4 are flow charts showing the program of the operation of the above embodiment. FIG. 2 shows an “automatic” operation, FIG. 2 shows an “extraction” operation, and FIG. 4 shows a “filling” operation. The operation of the embodiment will be described below with reference to FIG.

Automatic operation (see FIG. 2); After inserting and setting the nozzle 3 into the gauge hole of the target portion where oil change is to be performed, in the switch panel 21,
When the selection switch 24-1 (“auto”) is pressed and the start switch 25 is pressed, the automatic operation is started. First, after clearing the contents of the flow rate counter C ₁ for counting the extracted oil (1), the pump 7 is driven in the normal direction to set the solenoid valve 9 to the waste oil tank 10
At the same time as switching to the port P ₁ on the side, the process display lamp 32 lights up and displays that the process is an “extraction” process (2). When it is detected that the oil has flowed into the pipe line by the float switch 4 as the pump 7 is driven (3), the flow rate counter C ₁
Start counting the flow signal from the flow meter 8 with (4),
The content of this counter C ₁ is displayed on the sampling amount display 31 (5). After that, when the oil removal from the target part is finished and the air flows into the oil pipeline, this is detected by the float switch 4 (6), the counting by the counter C ₁ is stopped (7), and the inflow air is detected. After the counting is stopped for a certain period of time T ₁ (8), the oil in the oil pipe is discharged into the waste oil tank 10, and the pump 7 is stopped (9).

Next, the pump 7 is driven in the reverse direction to switch the solenoid valve 9 to the port P ₂ on the side of the new oil tank 11 and the process display lamp 32 lights up to indicate that the process is the "filling" process (10). When the float switch 4 detects that oil has flowed into the oil pipe along with the driving of the pump 7 (11), the flow counter C ₂ for counting the filled oil starts counting the flow signal from the flow meter 8. (12) The contents of the counter C ₂ are displayed on the filling amount display 30 (13). In this way, new oil is filled, and when the filled amount C ₂ becomes equal to the previously weighed out amount C ₁ (14), the pump 7 is stopped, the counter C ₂ is stopped counting, and the process display lamp 32 is turned off. At the same time, the alarm output unit 23 outputs an alarm for a predetermined time to notify the end of work (15), and returns.

Therefore, in this automatic operation, the old oil is extracted while being weighed, the end of the extraction is detected by the inflow of air into the pipe line, and the operation automatically shifts to the filling of new oil. Fill with new oil and finish. Here, the contents of the filling amount counter C ₁ and the indication of the filling amount indicator 30 are held until the reset switch 27 of the switch panel 21 is pressed because the replacement operation may be repeated like torque converter oil. It is said that it will be possible to add up and it will be useful for calculating the price of filled oil.

Sampling operation (refer to FIG. 3); After setting the nozzle 3 to the target part, when the "draining" operation is selected and started by the switch panel 21, the contents of the flow rate counter C ₁ for measuring the drained oil is cleared first. Then, (1), and the preset amount input by the preset input key set 29 is read into PS ₁ (2). At this time, if the preset amount is not set, PS ₁ is given a predetermined value according to the capacity of the waste oil tank 10. After that, the pump 7 is driven in the normal direction to switch the solenoid valve 9 to the port P ₁ on the waste oil tank side, and the process display lamp 32 is “disconnected”.
The process is lit and displayed (3). When the float switch 4 detects that the oil has flowed into the pipeline along with the driving of the pump 7 (4), the flow counter C ₁ starts counting the flow signal from the flow meter 8 (5). The content of the counter C ₁ is displayed on the sampling amount display 31 (6). When the oil removal amount C ₁ reaches the preset amount PS ₁ (7) or when the flow switch 4 detects that air has flowed into the pipeline (8), the counter C ₁ is counted. After stopping (9) and waiting for the predetermined time T ₁ (10), the oil in the oil pipe is discharged into the waste oil tank 10, the pump 7 is stopped, the process display lamp 32 is turned off, and the alarm output unit 23 The alarm is output for a predetermined time (11) and the process is returned.

Therefore, in this sampling operation, only the old oil is sampled, and the sampling amount is automatically stopped when either the sampling amount reaches the preset value or the sampling from the sampling target portion is completed. To stop the extraction manually, the stop switch 26 of the switch panel 21 may be used.

Filling operation (see FIG. 4); After the nozzle 3 is set on the target portion, when the "filling" operation is selected and started by the switch panel 21, the preset amount input by the preset input key set 29 is PS. Read to ₂ (1). At this time, if the preset amount is not set, PS ₂ is given a predetermined value according to the capacity of the new oil tank 11. Then, the pump 7 is driven in the reverse direction to switch the solenoid valve 9 to the port P ₂ on the side of the new oil tank, and the process display lamp 32 lights up to indicate that the process is the "filling" process (2). When the outflow of oil is detected by the float switch 4 along with the driving of the pump 7 (3), the flow counter C ₂ for metering the filled oil starts counting the flow signal from the flow meter 8 (4). The contents of ₂ are displayed on the filling amount display 30 (5). Filling amount C ₂ with oil filling
Reaches the preset amount PS ₂ (6) or when it detects that air has flowed into the pipeline with the float switch 4 (7), it stops counting the counter C ₂ (8) and stops the pump 7. The process display lamp 32 is turned off, an alarm is output from the alarm output unit 23 for a predetermined time (9), and the process is returned.

Therefore, in this filling operation, only new oil is filled, and the filling amount reaches the preset value, the new oil tank 11 becomes empty, or the automatic stop is performed. To stop the filling manually, the stop switch 26 of the switch panel 21 may be pressed while referring to the indication on the filling amount display 30.

According to the embodiment configured as described above, the automatic operation is performed to fill the same amount of new oil as the old oil withdrawal amount, and the excess or deficiency of the filling can be appropriately adjusted by the withdrawing operation or the filling operation. . Any of these operations can be easily performed only by an operation input on the control panel 20. Further, when the torque converter oil is replaced, the automatic operation and the driving of the engine of the automobile are alternately performed a required number of times, and finally the excess or deficiency of the filling may be adjusted by the extracting operation or the filling operation.

[Advantages of the Invention] The present invention is configured as described above and has the following advantages.

In addition to automatic operation for continuous withdrawal and filling, withdrawal and filling can be done independently and only by input operation on the control panel, so even if there is an excess or deficiency in the oil filling amount, withdrawal or addition can be done on the spot. Filling is extremely easy, and even an unskilled worker can fill oil accurately.

In addition, all operations such as operation selection, presetting of the filling amount, and manual operation while observing the measured value on the display means can be performed by one control panel, and various customer needs can be immediately met.

Furthermore, all operations are possible with one pump, and a small and inexpensive device can be provided.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of an embodiment of the present invention. 2 and 3 and 4 are flowcharts showing the operation of the embodiment. 1 is the main body of the oil exchanging device, 3 is a dual-purpose nozzle, 4 is extraction end detecting means, 7 is a pump, 8 is a weighing machine that serves both as extraction oil measuring means and filling oil measuring means, 20 is a control panel, 21-1 to 21-1 to 21-3. Is a selection switch as selection means, 26 is a stop switch as stop means, 29 is a preset input key as preset means, and 40 is a control section as control means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-53-143839 (JP, A) JP-B-54-17104 (JP, B2) JP-B-46-27288 (JP, Y1)

Claims (1)

[Claims] 1. A nozzle for both oil withdrawal and filling, a pump capable of forward and reverse rotation for withdrawing and filling oil through the nozzle, means for measuring old oil withdrawn, detection of the end of withdrawal of old oil Means, means for measuring new oil to be filled, means for selecting one operation among automatic, draining and filling operations, means for stopping the operation selected and executed by the selecting means, and at least the filling operation A control panel provided with means for presetting the amount of oil associated with the above, and means for displaying the preset amount in the preset means and the measured values given by the both measuring means;
An oil exchanging device comprising: a. When the automatic operation is selected on the control panel, the pump is normally rotated to drain old oil, and when the detection means detects the end of draining, the draining operation is stopped and the pump is continuously operated. Reversely, refilling with new oil is performed, and if the withdrawal amount and the replenishing amount given by both of the measuring means become substantially equal, the filling is stopped. b. When the draining operation is selected on the control panel, the pump is normally rotated to drain the old oil, and the draining is performed when the detecting means detects the end of the draining or the operation of the stopping means. Stop. c. When the filling operation is selected on the control panel, the pump is reversed to fill a new oil, and the filling amount given by the measuring means becomes equal to the preset amount in the preset means or the stopping means. When the operation is detected, the filling is stopped.