JP2019064723A - Maintenance device for vehicle - Google Patents

Abstract

To provide a vehicle maintenance device without a need for a general purpose fault diagnosis system scan tool, which reads out only vehicle information necessary for an actuation of a maintenance device for vehicle by connecting a fault diagnosis system connector provided in the vehicle maintenance device to the fault diagnosis system connector of the vehicle and which performs a motion control of the device using the vehicle information read out without an input operation by a person.SOLUTION: A vehicle information read-out unit for reading out vehicle information through a fault diagnosis system connector from on-vehicle electronic control device provided in a vehicle side and a vehicle information storage unit for storing the vehicle information read out in the vehicle information read-out unit are provided and a pull out action of a Froude or a coolant and a filling action of a new Froude or a new coolant based on the vehicle information stored in the vehicle information storage unit are performed. In an exchange action of a coolant, the vehicle information in regard to an engine rpm is used and in an exchange action of a Froude, the vehicle information in regard to a temperature of a transmission Froude is used.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a maintenance apparatus for a vehicle which performs replacement of various fluids (for example, ATF / CVTF) of a vehicle and replacement of a refrigerant for an air conditioner.

  Conventionally, as a device for exchanging fluid in a transmission, a device disclosed in Patent Document 1 is known. This device inserts the nozzle into the oil pan from the filler tube for inserting the fluid level gauge provided in the transmission, with the inserted nozzle, withdraws the old fluid in the oil pan and injects a new fluid based on the withdrawn amount. The fluid in the oil pan is diluted and replaced by repeating the replacement operation a plurality of times. Then, at the stage of finishing the fluid replacement work, in order to inject a proper amount of fluid, the fluid amount is adjusted within the proper fluid temperature range described in the maintenance manual of the vehicle.

  Further, a device disclosed in Patent Document 2 is a device that recovers a refrigerant filled in an air conditioner of a car, regenerates the recovered refrigerant, and charges the regenerated refrigerant into the air conditioner. It has been known. The device of Patent Document 2 recovers the refrigerant in the air conditioner in a state where the engine of the automobile is driven, performs regeneration processing, and then sets the appropriate filling pressure set based on the outside air temperature and the engine speed at that time. From the two steps of the circulating regeneration step of filling in and the vacuuming regeneration step of filling based on the specified filling amount after recovering the refrigerant by vacuum drawing and performing the regeneration process without driving the engine One or the other is selected to perform the filling operation. In this device, the detection of the engine speed is performed based on the ripple voltage at the battery terminal of the automobile.

  As described above, in the vehicle maintenance device, information on the vehicle side such as fluid temperature and engine speed is acquired, and the operation control of the device is performed using the acquired information. It is possible to provide a suitable vehicle maintenance service according to the situation. As a method of obtaining the vehicle side information in this case, for example, in the case of the above-mentioned fluid temperature, it is performed by measuring the temperature of the fluid extracted from the transmission into the apparatus. As to the engine speed, as described above, the engine speed is detected based on the ripple included in the DC voltage obtained from the output of the alternator linked to the engine.

  By the way, in recent years, a failure diagnosis system is mounted in a car, and for example, in a failure diagnosis system corresponding to the standard of OBD 2, a connector for detachably mounting the OBD 2 scan tool from the outside is provided. By connecting the OBD2 scan tool to the connector, various vehicle information such as engine speed, coolant temperature, engine oil temperature, and transmission fluid temperature can be obtained. The OBD2 connector is usually used for reading out data for failure diagnosis, but since a lot of vehicle information can be obtained by connecting a general-purpose OBD2 scan tool, this can be used for purposes other than failure diagnosis. It has the potential to be used effectively. Therefore, there is a method in which a mechanic inputs information read by the OBD 2 scan tool in the above-described vehicle maintenance device, but it is necessary for the mechanic to become familiar with the operation method of the OBD 2. Since the vehicle information read by the OBD 2 scan tool is extensive, the information needed to operate the vehicle maintenance system is a part of it. Therefore, only necessary information is extracted from the read information, and the vehicle maintenance device is operated to input vehicle information. Therefore, the mechanic needs to learn how to operate both the vehicle maintenance device and the OBD2 scan tool, and also needs to operate both simultaneously and in parallel.

Japanese Patent Application Publication No. 2003-335400 JP, 2004-316933, A

  The present invention has been made in view of the above-described problems, and the object of the present invention is to provide an OBD2 connector (fault diagnosis system connector included in a vehicle maintenance device without requiring a general-purpose OBD2 scan tool). ) By connecting to the OBD 2 connector of the vehicle to read only the vehicle information necessary for the operation of the vehicle maintenance device, and performing vehicle operation control of the device using the read vehicle information without input operation by human hands To provide.

  (1) In order to achieve the above object, the present invention relates to a vehicle maintenance device for replacing a vehicle fluid and a vehicle coolant, wherein a vehicle is connected to a vehicle through a failure diagnosis system connector from an on-vehicle electronic control device provided on the vehicle side. A vehicle information reading unit for reading information, and a vehicle information storage unit for storing vehicle information read by the vehicle information reading unit, the fluid and refrigerant extracting operation based on the vehicle information stored in the vehicle information storage unit, We propose a vehicle maintenance device characterized by performing new fluid and refrigerant filling operations.

  (2) The vehicle maintenance device proposed above has a vehicle maintenance device-side failure diagnosis system connector which enables connection of a vehicle information reader separate from the vehicle maintenance device from the outside of the vehicle maintenance device, It is desirable to be able to acquire vehicle information on the vehicle side by means of a vehicle information reader connected to the vehicle maintenance device.

  (3) It is desirable that the vehicle maintenance device proposed above acquire vehicle information on the engine rotational speed from the vehicle side and exchange the refrigerant based on the acquired vehicle information.

  (4) It is desirable that the vehicle maintenance device proposed above acquire vehicle information on the temperature of the transmission fluid from the vehicle side, and exchange the transmission fluid based on the acquired vehicle information.

  According to the present invention, when performing vehicle maintenance by operating the vehicle maintenance device, information on the vehicle side is read and set without requiring an input operation by human hands, and operation control is performed automatically. it can. If the vehicle maintenance device is a transmission fluid replacement device, the fluid temperature detected by the vehicle side is acquired from the OBD 2 fault diagnosis system at the stage of final fluid volume adjustment after fluid replacement work is completed. The oil amount adjustment can be performed at the timing when the temperature is in the appropriate temperature range. The fluid for transmission has a high coefficient of thermal expansion, and its volume expands with the rise in fluid temperature. Therefore, during oil volume adjustment work, it is called acquisition of appropriate temperature data and oil volume adjustment timing depending on temperature. Although specialized expertise and a rich work experience were required in terms of points, high quality replacement work can be provided without such specialized skills.

  If the vehicle maintenance device is a refrigerant regeneration processing device for a car air conditioner, the refrigerant is recovered from the air conditioner in a state where the engine of the car is driven to perform regeneration processing, and then the regenerated refrigerant is transferred to the air conditioner side. In the case of filling, the engine speed at that time can be acquired from the OBD 2 failure diagnosis system, and the filling can be performed at an appropriate filling pressure calculated based on the acquired engine speed and the outside air temperature. Therefore, high-quality refrigerant regeneration processing can be provided without using a detection circuit that detects the engine speed from the ripple voltage at the battery terminal of the automobile.

  In addition, the vehicle information reader is connected to the OBD2 connector provided in the vehicle maintenance device from the outside of the vehicle maintenance device, and the vehicle information reader reads the vehicle information on the vehicle side to use the function of the vehicle information reader It can be performed. As a result, the OBD 2 scan tool that exclusively reads the vehicle information related to the failure diagnosis system of the vehicle can be connected, and the work related to the failure diagnosis system can be performed via the vehicle maintenance device.

It is an explanatory view showing a fluid exchange device of example 1 of the present invention. It is a block diagram showing a control system of example 1 of the present invention. It is an explanatory view showing the operation screen at the time of setting. It is a flowchart figure which shows the operation flow of an automatic course. It is an explanatory view showing operation of fluid injection work. It is an explanatory view showing operation of fluid extraction work. It is explanatory drawing which shows the refrigerant processing apparatus of this invention Example 2. FIG. It is a block diagram showing a control system of example 2 of the present invention. It is a flowchart figure which shows the operation flow of a collection | recovery reproduction | regeneration process. It is explanatory drawing which shows the flow of the refrigerant | coolant in a collection | recovery reproduction | regeneration process. It is a flowchart figure which shows the operation flow of a filling process. It is explanatory drawing which shows the flow of the refrigerant | coolant in a filling process.

Example 1
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a fluid replacement device as a vehicle maintenance device according to the present invention.
A fluid changer 1 includes a pump 2 capable of rotating in reverse, a new oil tank 3 for storing new fluid to be injected into the vehicle, and a waste oil tank 4 for storing old fluid removed from the vehicle. Attached to the pump 2 are a suction line 5 communicating with the new oil tank 3, a discharge line 6 communicating with the waste oil tank 4, and an inlet hose 8 and a outlet hose 9 connecting the overflow plug adapter 7 at the tip. New oil injection system which sucks in new oil from new oil tank 3 through suction line 5 by switching between forward and reverse, and injects new oil from transmission hose 8 to transmission oil pan, and from transmission oil pan A waste oil removing system is configured to remove the old oil through the removal hose 9 and discharge the old oil from the discharge pipe line 6 to the waste oil tank 4. The overflow plug adapter 7 is replaced and connected with a plug provided in the oil pan of the transmission, and the fluid pan is extracted and injected.

  The solenoid valves 13, 14, 15, 16 open and close the suction line 5, the discharge line 6, the inlet hose 8 and the outlet hose 9, respectively. A strainer 17 filters impurities contained in the old oil extracted through the extraction hose 9 when the solenoid valve 16 is opened. The load cells 18 and 19 are provided at the bottom of the new oil tank 3 and the waste oil tank 4 and detect the weight of each of the tanks 3 and 4 to detect the amount of fluid in the tank.

  Reference numeral 22 denotes a vehicle information reading unit, which connects the OBD 2 connector 23 (fault diagnosis system connector described in the claims) extending through the signal cable to the vehicle-side OBD 2 connector provided on the vehicle side The vehicle information held by the control device is read. At least information on fluid temperature is acquired as vehicle information to be read. A vehicle information storage unit 24 temporarily stores vehicle information read by the vehicle information reading unit 22. Reference numeral 25 denotes an apparatus main body side OBD 2 connector integrally provided with the fluid replacement apparatus main body. The vehicle information reading apparatus 26 can be connected to the apparatus main body side OBD 2 connector 25 from the outside of the fluid exchange apparatus main body 1. By connecting the vehicle information reader 26, the vehicle information can be directly read through the vehicle information reader 22 and the OBD 2 connector 23 via the fluid replacement device main body 1. Therefore, it is possible to connect to the fluid exchange apparatus main body 1 using a commercially available OBD2 scan tool as a vehicle information reader, and to perform work with the OBD2 scan tool.

  An operation panel 20 includes a liquid crystal display device with a touch panel function, an oil type selection screen for selecting an oil type to be replaced, a course selection screen for selecting a course to be executed, an adjustment screen for adjusting an exchange amount, and a selected course Operation screen display such as start screen for starting operation and stop screen for stopping operation of the device, and guidance screen display such as sampling amount display, injection amount display, set amount display, procedure display, etc. Display.

  Next, a control system of the fluid exchange apparatus according to the present invention will be described based on FIG. Reference numeral 21 denotes a control unit comprising a microcomputer, to which the pump 2, vehicle information reading unit 22, vehicle information storage unit 24, electromagnetic valves 13 to 16, load cell 18, load cell 19, operation panel 20 are connected, and from load cells 18 and 19 The pump 2 and the solenoid valves 13 to 16 are operated based on the signal and the setting on the operation panel 20, and the oil amount is output based on the fluid temperature information output from the vehicle information reading unit 22 and stored in the vehicle information storage unit 24. Determine the timing of the adjustment.

The operation of replacing the CVT fluid of the level gaugeless transmission with the fluid replacement device configured as described above will be described with reference to FIGS. In addition, the specific numerical value displayed here is an example, and is not limited to a present Example.
First, as preparation for the fluid replacement work, the engine of the vehicle to be fluid replaced is lifted up horizontally and lifted up, then the plug at the oil pan bottom of the transmission is removed and the adapter 7 for overflow plug of the fluid replacement device 1 is drained. Connect to Next, select the oil type, replacement method, replacement course, replacement amount, and proper oil temperature range of the fluid along the screen display of the operation panel 20 as setting operation, and after confirming the setting contents, enter start and change work The operation is started.

  That is, as shown in FIG. 3, select "CVTF" from the oil type selection screen (A), select "down" from the replacement method selection screen (B), and select "automatically" from the course selection screen (C). Select the desired replacement amount from the replacement amount setting screen (D), set the desired oil temperature range from the appropriate oil temperature range setting screen (E), select "Confirmation on the setting content confirmation screen (F)" After inputting “], when“ start ”is input on the start confirmation screen (G), the exchange work operation is started. If "Return" is input on each screen, the screen display is returned to the previous screen, and the setting can be made again.

Next, FIG. 4 shows that oil type of fluid (CVTF), replacement method (downward removal), replacement course (full automatic course), replacement amount (here 6 L), appropriate temperature range (for example 35 to 45 ° C.) are set Shows a flowchart of the operation when being performed.
When the replacement operation is started, an injection step of supplying new fluid from the new oil tank 3 into the oil pan connected by the overflow plug adapter 7 is executed (1). In the injection step, as shown in FIG. 5, the solenoid valve 13 and the solenoid valve 15 are opened, the pump 2 is rotated in the forward direction, and new fluid is introduced from the new oil tank 3 through the suction line 5 and the injection hose 8 into the oil pan. It is injected and diluted and mixed with the old fluid in the oil pan. In this injection process, the amount of injection is measured by the load cell 18 of the new oil tank 3, and when the specified amount a (here 2 liters) is injected, the solenoid valve 13 and the solenoid valve 15 are closed and the pump 2 is stopped. End.

  When the injection step is completed, it is checked whether the total injection amount has reached the preset injection amount (= exchange amount 6 liters) (2). If the preset injection amount has not been reached, the predetermined waiting time t ( In this case, it takes 60 seconds, and idles the engine to convect the fluid in the transmission. When the waiting time t has elapsed (3), a sampling step of collecting the diluted fluid above the overflow tube in the oil pan into the waste oil tank 4 is performed (4). In the removal step, as shown in FIG. 6, the solenoid valve 14 and the solenoid valve 16 are opened, the pump 2 is reversed, the fluid in the oil pan is removed through the removal hose 9, and impurities are filtered by the strainer 17 It is collected in the tank 4. In this extraction step, the load cell 19 of the waste oil tank 4 measures the change in the amount of extraction, and when the same amount (i.e. 2 liters) of fluid as the specified amount a injected in the injection step is extracted, the solenoid valve 14 and the solenoid valve 16 To stop and stop the pump 2.

  Repeat the above-mentioned injection process-standby-extraction process, increase the new oil dilution ratio of the fluid in the oil pan, and assume that the total injection quantity reached the preset injection quantity (6 liters) in processing (2) If it judges, it will transfer to the oil temperature information acquisition process which acquires fluid temperature information in an oil pan (5). The oil temperature information acquisition step is to acquire information on the fluid temperature in the oil pan before the final adjustment of the oil amount, and the vehicle information reading unit 22 receives the fluid temperature information by the OBD 2 connector 23 connected to the vehicle. Acquire by reading.

  Here, check whether the obtained fluid temperature value is within the set proper temperature range (35 to 45 ° C.) (6), and if it is within the proper temperature range, the oil to optimize the amount of fluid in the oil pan Transfer to the quantity adjustment process (7). The oil amount adjustment step is to level the fluid in the oil pan to the upper end level of the overflow tube to optimize the amount of fluid in the oil pan, and open the solenoid valve 14 and the solenoid valve 16 as in the extraction step. Reverse the pump 2 and remove the fluid in the oil pan from the overflow tube. If it is confirmed that the amount of fluid removed exceeds the specified amount b (in this case, 0.2 liter) and the amount removed by the load cell 19 does not change by more than a predetermined amount within a predetermined time (8), the solenoid valve 14 and The valve 16 is closed and the pump 2 is stopped to complete the process. After completion, display the guidance screen (H) on the operation panel 20 prompting you to remove the overflow plug adapter 7 from the oil pan and attach the plug as it is, and enter "confirm" after attaching the plug. Is complete. If the specified amount b of the fluid was not discharged from the overflow tube in the treatment (7), the fluid contained in the oil pan may have been smaller than the upper end of the overflow tube, so the injection step (1) Execute to inject a specified amount of fluid, check that the specified amount b or more of the fluid has been discharged from the overflow tube, and adjust the oil amount.

  If the fluid temperature is high (for example, 60 ° C.) due to the appropriate temperature range in the process (6), it is determined that the fluid temperature is high and the oil amount adjustment can not be performed, and the operation is temporarily stopped. On the operation panel 20, as shown in FIG. 7, a fluid temperature acquired from the vehicle side and a guidance screen (I) for prompting the user to wait until the oil temperature drops because the fluid temperature is high are displayed.

Example 2
Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a whole block diagram which shows the refrigerant | coolant reproduction | regeneration processing apparatus of the air-conditioner apparatus for motor vehicles as a maintenance apparatus for vehicles which concerns on this invention. Reference numeral 31 denotes an apparatus body, which extends a high pressure hose 32 and a low pressure hose 33 connected to the high pressure service valve VH and the low pressure service valve VL of the vehicle air conditioner. The high pressure hose 32 and the low pressure hose 33 have couplers 34 and 35 with a check valve at one end, and the other ends are respectively connected to the high pressure line 36 and the low pressure line 37 in the apparatus main body 31.

  The high-pressure line 36 includes a high-pressure pressure sensor 38 and an evaporator 39 for depressurizing and evaporating the refrigerant, an oil separator 40 for separating refrigeration oil from the recovered refrigerant, and a filter for removing impurities and moisture from the refrigerant It is piping to the compressor 42 via the drier 41. The low pressure pipeline 37 includes a low pressure pressure sensor 43 and a vacuum pump 44 for evacuating the vehicle air conditioner, and connects the connection pipeline 45 between the low pressure pressure sensor 43 and the vacuum pump 44. It is connected to the high pressure line 36.

  A supply pipe 46 is connected to the discharge side of the compressor 42 and is connected to the refrigerant recovery tank 49 via a condenser 47 that exchanges heat in the oil separator 40 and a condenser 48 that liquefies outside the oil separator 40 . Reference numeral 50 denotes a refrigerator oil receiver, which discharges the refrigerator oil separated by the oil separator 40 through an oil discharge pipe 51. A safety valve 52 is attached to the upper portion of the refrigerant recovery tank 49, and when the pressure in the tank 49 exceeds a predetermined level, the air is released to discharge the air above the tank 49. A load cell 53 is attached to the refrigerant recovery tank 49 and measures the weight of the refrigerant stored in the tank 49.

  Reference numeral 54 denotes a filling pipe, which connects the refrigerant recovery tank 49 and the connecting pipe 45, and fills the refrigerant in the tank 49 into the vehicle air conditioner. The reference numeral 55 denotes a circulation line, which has valves 56 and 57 to which the couplers 34 and 35 of the high pressure hose 32 and the low pressure hose 33 are connected at the tip, and is connected to the filling line 54 to form a closed circuit in the apparatus main body 31 . Reference numeral 58 denotes a refilling pipeline, which is connected to the connecting pipeline 45, and an oil can 59 for refilling refrigerating machine oil at the time of regeneration refrigerant filling, and a new refrigerant when the amount of regeneration refrigerant in the refrigerant recovery tank 49 is insufficient. A fluorocarbon can 60 for refilling the inside of the tank 49 is connected.

  61 to 69 are solenoid valves for line switching, and the connecting position of the solenoid valve 61 and the connecting line 45 and the evaporator 39 between the high pressure pressure sensor 38 in the high pressure line 36 and the connecting position of the connecting line 45 Between the connection position of the low pressure hose 35 in the low pressure line 37 and the pressure sensor 43 for low pressure, the connection between the connection position of the solenoid valve 63 and the connection line 45 and the vacuum pump 44 A valve 64 is provided, a solenoid valve 65 is provided in the oil discharge pipe 51, a solenoid valve 66 is provided in the filling pipeline 54, a solenoid valve 67 is provided in the circulation pipeline 55, and a solenoid valve is provided on the oil can 59 side of the replenishment pipeline 58. 68 · A solenoid valve 69 is provided on the side of the fluorocarbon can 60. Reference numerals 70 to 73 are check valves, and a check valve 70 is provided in the filling line 54, a check valve 71 is provided in the circulation line 55, and a check valve 72 / Froon can be provided on the oil can 59 side of the replenishment line 58. A solenoid valve 73 is provided on the 60 side.

  A vehicle information reading unit 22 connects the OBD2 connector 23 extending through the signal cable to the vehicle-side OBD2 connector provided on the vehicle side, and reads the vehicle information held by the on-vehicle electronic control device of the vehicle. . As vehicle information to be read, at least information on the engine speed is acquired. A vehicle information storage unit 24 temporarily stores vehicle information read by the vehicle information reading unit 22. Reference numeral 25 denotes an apparatus main body side OBD 2 connector integrally provided with the refrigerant regeneration processing apparatus main body, and the vehicle information reader 26 can be connected to the apparatus main body side OBD 2 connector 25 from the outside of the refrigerant regeneration processing apparatus main body 31. By connecting the vehicle information reader 26, the vehicle information can be directly read through the vehicle information reader 22 and the OBD 2 connector 23 via the refrigerant regeneration processing device main body 31. Therefore, the vehicle can be connected to the refrigerant regeneration processing apparatus main body 31 using a commercially available OBD2 scan tool as a vehicle information reading device, and work can be performed by the OBD2 scan tool.

Next, FIG. 8 is a block diagram showing a control system of the refrigerant regeneration processing device according to the second embodiment of the present invention.
A control unit 74 receives a signal from the operation panel 75 and operates each device of the apparatus based on a stored program. The operation panel 75 includes a filling amount display unit 76 for displaying a refrigerant charging amount as a display function, a high pressure display unit 77 for displaying a high pressure, and a low pressure display unit 78 for displaying a low pressure. As an input function, the course selection key 79, the adjustment key 80 for adjusting the filling amount, etc., the start key 81, the pause key 82 for temporarily interrupting the work, and the device after initial work is completed. An end key 83 for returning to the state is provided.

Subsequently, the operation of the refrigerant regeneration processing apparatus configured as described above will be described.
In the present apparatus, it is possible to select the regeneration filling course and the manual course with the course selection key 79. Among these, the reclamation and filling course will be described with reference to the drawings.

9 to 11 are flowcharts of the regeneration filling course, and FIGS. 12 to 14 are operation explanatory diagrams.
The regenerating and charging course is a recovery and regeneration process in which almost the whole amount of refrigerant is removed from the air conditioning system for automobiles, and the refrigerant and refrigerator oil are separated by the apparatus main body 31 to wash and refill the refrigerant and perform regeneration and the like of the refrigerant oil. And a filling step of filling the automotive air conditioner with an appropriate amount of refrigerant.

<Recovery / Reproduction Step> A flowchart of FIG. 9 and an operation explanatory view of FIG.
As a preparation operation, the operator first stops the engine, and connects the high pressure hose 32 and the low pressure hose 33 of the apparatus main body 31 to the high pressure service valve VH and the low pressure service valve VL of the automotive air conditioner by couplers 34 and 35. From this state, select "Refilling course" with the course selection key 79 of the operation unit 75, set the specified refrigerant amount C to be filled with the adjustment key 80 while looking at the filling amount display unit 76, and enter the start key 81 , Recovery and regeneration process is started.

  When the regeneration filling course is started, it is first confirmed whether the vehicle engine has stopped. This confirmation is performed by the vehicle information reading unit 22 reading the engine rotational speed by the OBD 2 connector 23 connected to the vehicle. As a result, if the rotation of the engine is not confirmed, it is determined that the vehicle engine is stopped (101). Next, the solenoid valves 61 and 62 of the high pressure line 36 are opened (102), and the compressor 42 is driven (103). With the drive of the compressor 42, the refrigerant of the automobile air conditioner is introduced from the high pressure hose 32 in the state of high pressure liquid along the [A] of FIG. 10 and is reduced and vaporized by the evaporator 39 through the high pressure line 36 After refrigeration oil is separated by the separator 40, it is filtered and removed by the filter dryer 41 through the supply line 46, liquefied by the condensers 47 and 48, and recovered in the refrigerant recovery tank 49. At this time, in the oil separator 40, condensation and liquefaction of the refrigerant are performed by the built-in condenser 47, so vaporization and liquefaction act synergistically to perform heat exchange efficiently.

  When the pressure P detected by the high pressure sensor 38 in the high pressure line 36 becomes equal to or less than the first predetermined pressure P1 (104), it is determined that the refrigerant remaining on the high pressure side of the air conditioner is substantially in a gaseous state The solenoid valve 63 is opened (105), and the gas refrigerant remaining on the high pressure side and the low pressure side of the air conditioner is recovered to the refrigerant recovery tank 49 through [B] in FIG.

  Thereafter, when the pressure P detected by the low pressure sensor 43 in the low pressure line 37 becomes equal to or lower than the second predetermined pressure P2 (106), the solenoid valve 62 is closed (107) and the compressor 42 is stopped (108). At the same time, the solenoid valve 64 is opened (109), the vacuum pump 44 is operated (110), and a vacuum is drawn along [C] in FIG. Then, when the pressure detected by the low pressure pressure sensor 43 becomes equal to or lower than the third predetermined pressure P3 (111), it is judged that the refrigerant recovery of almost the entire amount is completed, and the vacuum pump 44 is stopped (112). The valves 61, 63, 64 are closed (113) to complete the collection.

  When the refrigerant recovery is completed, the solenoid valve 65 is opened (114), and the separated refrigerator oil in the oil separator 40 is discharged to the refrigerator oil receiver 50 through the discharge pipe 51 through [D] in FIG. When it passes (115), the solenoid valve 65 is closed (116), and the recovery and reproduction process is finished, and the completion of the recovery and reproduction process, transition to the filling process, and guidance for driving the vehicle engine are output ( 117).

<Filling process> A flowchart of FIG. 11 and an operation explanatory view of FIG.
When the operator drives the engine according to the guidance of step (117) and inputs the start key 81, the filling process is started.

  When the filling process is started, first, it is confirmed whether the vehicle engine is driven. This confirmation is performed by the vehicle information reading unit 22 reading the engine rotational speed by the OBD 2 connector 23 connected to the vehicle. As a result, when the engine speed is acquired as the vehicle information, it is determined that the vehicle engine is in a driven state (118). Next, the solenoid valves 63, 66, 67 of the filling pipe 54 are opened (119), and the refrigerant in the refrigerant recovery tank 49 is supplied from the low pressure side to the automotive air conditioner along [E] in FIG. . At the same time, the solenoid valve 68 of the refilling pipeline 58 is opened (120), and the refrigerator oil of the oil can 59 is injected into the automotive air conditioner along [F] in FIG.

  Thereafter, when it is detected by the load cell 53 that the refrigerant in the refrigerant recovery tank 49 has decreased by the set predetermined refrigerant amount C (121), it is judged that the refrigerant of the specified amount C is filled in the automotive air conditioner, The solenoid valves 63, 66 and 67 of the conduit 54 are closed (122), and the solenoid valve 68 of the refilling conduit 58 is closed (123) to complete the filling operation. Then, the guidance of the completion of the filling process and the stop of the vehicle engine is output (124).

1 Fluid changer body 2 pump 3 new oil tank 4 waste oil tank 5 suction line 6 discharge line 7 adapter for overflow plug 8 injection hose 9 extraction hose 18 load cell 19 load cell 20 operation panel 22 vehicle information reader 23 OBD2 connector (fault) Diagnostic system connector)
24 Vehicle Information Storage Unit 25 Vehicle Maintenance Device Body Side OBD 2 Connector 26 Vehicle Information Reader

Claims (4)

In a vehicle maintenance device for replacing vehicle fluid and replacing vehicle coolant,
The vehicle information storage unit includes a vehicle information reading unit that reads vehicle information from a vehicle-mounted electronic control device provided on the vehicle side through the failure diagnosis system connector, and a vehicle information storage unit that stores vehicle information read by the vehicle information reading unit. A vehicle maintenance device characterized by performing a fluid and refrigerant extracting operation and a new fluid and refrigerant filling operation based on vehicle information stored in a unit. The vehicle maintenance device includes a vehicle maintenance device-side failure diagnosis system connector enabling connection of a vehicle information reading device separate from the vehicle maintenance device from the outside of the vehicle maintenance device, and the vehicle maintenance device from the outside The vehicle maintenance device according to claim 1, characterized in that vehicle information on the vehicle side can be acquired by a vehicle information reading device connected to the vehicle. The vehicle maintenance device according to any one of claims 1 and 2, wherein the vehicle maintenance device acquires vehicle information on an engine rotational speed from the vehicle side, and exchanges refrigerant based on the acquired vehicle information. . The vehicle maintenance device according to any one of claims 1 and 2, wherein the vehicle maintenance device acquires vehicle information on the temperature of the transmission fluid from the vehicle side and exchanges the transmission fluid based on the acquired vehicle information. Maintenance equipment.

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