JP5934692B2 - Fluid recovery and refilling equipment - Google Patents

Description

  The present invention relates to a fluid recovery / regeneration / filling apparatus.

  2. Description of the Related Art Conventionally, there has been a fluid collection / regeneration / filling device that collects and regenerates refrigerant from a vehicle air conditioner and fills (supplements) oil suitable for the vehicle air conditioner when filling the recovered and regenerated refrigerant into the vehicle air conditioner. (For example, refer to Patent Document 1).

JP 2004-316933 A

The oil that fills the vehicle air conditioner varies depending on the type of vehicle. For example, in many vehicles driven only by an internal combustion engine such as a reciprocating engine or a rotary engine, a polyalkylene glycol (PAG) oil is used, and a vehicle using a combination of an internal combustion engine and an electric motor (a vehicle called a hybrid vehicle) or an electric motor. Many of the electric vehicles that are driven solely use polyol ester (POE) oil having high insulation properties.
For this reason, the conventional fluid recovery / regeneration / filling device, for example, when the POE oil is filled in the hybrid vehicle after the work of filling the PAG oil in the vehicle (reciprocating vehicle) driven only by the reciprocating engine, The PAG oil remaining in the tank is mixed with the POE oil and filled, so that appropriate oil performance (insulation characteristics and lubrication characteristics) cannot be obtained. In addition, even if a plurality of fluid recovery / regeneration / filling devices are used according to the type of oil, there is a risk that the combination of the type of oil and the fluid recovery / regeneration / filling device to be used may be mistaken, or a plurality of units are owned. For this reason, there is a problem that maintenance management takes time and cost.

  Therefore, an object of the present invention is to provide a fluid recovery / regeneration / filling device that can easily and reliably clean the inside of a pipe in which oil has flowed and can be filled with a plurality of types of oil by a single unit.

In order to achieve the above object, a fluid recovery / regeneration / filling device according to the present invention includes a first hose having a first joint member at a distal end side that is detachable from a high pressure service valve of a vehicle air conditioner, and a low pressure service of the vehicle air conditioner. A second hose having a second joint member detachably attached to the valve on the distal end side, a merging pipe connected to the proximal end of the first hose and the second hose, and the vehicle connected to the merging pipe A recovery / regeneration piping circuit unit for separating and liquefying the oil-mixed refrigerant recovered from the air conditioner, a recovery tank for storing the refrigerant liquefied in the recovery / regeneration piping circuit unit, and the first a cleaning pipe portion for connecting the hose and the second hose base end side and the recovery tank, a first charge valve body capable first oil cans first oil is filled connected, said 1 h A first oil supply pipe portion for connecting the Jibarubu body and the collecting pipe, and the first oil and different types of second charge valve body second second oil cans oil is filled can be connected, A second oil supply piping section that connects the second charge valve main body and the merging piping section, and connects the first joint member of the first hose to a high-pressure service valve, In a state where the second joint member is connected to the low pressure service valve, the oil-mixed refrigerant in the vehicle air conditioner is collected from the first hose and the second hose through the merging pipe portion and the recovery and regeneration piping circuit portion. The first oil is supplied from the first charge valve body to which the first oil can is connected, and is regenerated as a liquefied refrigerant and recovered in the recovery tank. The vehicle air conditioner is configured to be filled with the first oil through the supply pipe section, the merging pipe section, and the first hose, and the second charge valve main body to which the second oil can is connected is second. The vehicle air conditioner is configured to be filled with the second oil through the oil supply pipe, the junction pipe, and the first hose, and the first joint member of the first hose is further charged with the first charge. In a state where the second joint member of the second hose is connected to the second charge valve main body while being connected to the valve main body, the liquefied refrigerant in the recovery tank is transferred from the recovery tank to the cleaning pipe portion. Through the first hose, the first charge valve body, and the first oil supply pipe, and the second hose, the second charge valve body, and the second oil supply line. It is flow sending the tube section, the washing liquid refrigerant from the first oil supply pipe portion and the second oil supply pipe portion is returned to the recovery tank through the collecting pipe and the recovery and recycling piping circuit section It is configured to do.

A first conversion joint for connecting the first joint member and the first charge valve body; a second conversion joint for connecting the second joint member and the second charge valve body; It is equipped with.
Further, a first joint detecting means for detecting whether or not the first joint member is connected to the first charge valve body, and whether or not the second joint member is connected to the second charge valve body. And a second joint detecting means for detecting.

  According to the present invention, the inside of a pipe through which oil has flowed can be easily and quickly washed. Oil remaining in the pipe can be removed reliably. A single unit can handle multiple types of oil filling operations. That is, it is not necessary to own a plurality of fluid collection / regeneration / filling devices according to the type of oil, and maintenance work and costs can be reduced. It can be cleaned using (and used in combination) the piping used in the recovery and recycling process and the filling process, contributing to a reduction in the number of parts and weight reduction.

It is a piping circuit diagram showing one embodiment of the present invention. It is a piping circuit diagram for demonstrating an oil filling process. It is a piping circuit diagram for demonstrating a reproduction | regeneration liquid refrigerant filling process. It is a piping circuit diagram for demonstrating an oil supply part washing | cleaning process. It is a piping circuit diagram for demonstrating the solenoid valve washing | cleaning process for merging. It is a principal part sectional front view showing one embodiment of the present invention. It is a principal part expanded sectional front view. It is principal part sectional drawing which shows the connection state of a 1st oil can. It is principal part sectional drawing which shows the attachment state of a 1st conversion coupling and a 2nd conversion coupling. It is principal part sectional drawing which shows the connection state of a 1st coupling member and a 2nd coupling member.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
As shown in FIG. 1, the fluid recovery / regeneration / filling device according to the present invention includes a first hose 1 having a first joint member 10 detachably attached to a high-pressure service valve Sa of a vehicle air conditioner S on the tip side, and a vehicle air conditioner. The vehicle air conditioner S includes a second hose 2 having a second joint member 20 detachably attached to the low-pressure service valve Sb of S and a recovery tank 3 for storing fluid recovered from the vehicle air conditioner S. The fluid (refrigerant) such as hydrofluorocarbon (HFC) filled in is recovered and regenerated, and the regenerated refrigerant is charged into the vehicle air conditioner S.

  And the 1st charge valve main body 6 (henceforth the 1st charge part 6 may be called) which can connect the 1st oil can 96 filled with the 1st oil for replenishing the vehicle air conditioner S, and A second charge valve body 7 (hereinafter also referred to as a second charge unit 7) to which a second oil can 97 filled with a second oil of a different type from the first oil can be connected, and a replenishing refrigerant A charge valve body 8 for replenishing refrigerant to which a refrigerant can 98 filled with fluid can be connected, a piping circuit section 80 connected to the proximal end side of the first hose 1 and the proximal end side of the second hose 2, and piping Control unit (not shown) such as CPU and sequencer for controlling each controlled valve such as the solenoid valve (open / close valve) and compressor C of the circuit unit 80, and operation of buttons and touch panels for sending instruction signals to the control unit (Not shown).

  The piping circuit portion 80 includes a first piping portion 11 connected to the proximal end side of the first hose 1, a second piping portion 12 connected to the proximal end side of the second hose 2, the first piping portion 11, and A merging pipe part 81 connected to the second pipe part 12 via a merging part Q, and a recovery / regeneration pipe connected to the merging pipe part 81 via a check valve Ba and connected to the upper part of the recovery tank 3 A circuit part 82, a first oil supply pipe part 86 connecting the first charge part 6 and the merging pipe part 81, a second oil supply pipe part 87 connecting the second charge part 7 and the merging pipe part 81, and replenishment The refrigerant charge valve main body 8 and the merging pipe section 81 are connected to a supplementary refrigerant supply pipe section 88.

A first electromagnetic valve V1 is interposed in the first piping part 11, and a second electromagnetic valve V2 is interposed in the second piping part 12.
In addition, the joining pipe section 81 is provided with a third solenoid valve (joining solenoid valve) V3, and a first oil supply is provided between the third solenoid valve V3 and the check valve Ba (recovery and regeneration piping circuit section 82). A pipe part 86, a second oil supply pipe part 87, and a supplementary refrigerant supply pipe part 88 are connected to each other.
The piping circuit unit 80 has one end side (upstream side) connected to the lower part in the recovery tank 3, and the other end side (downstream side) via a fourth solenoid valve (liquefied refrigerant supply solenoid valve) V4. In addition, a liquefied refrigerant filling pipe portion 83 connected between the base end side of the first hose 1 and the first electromagnetic valve V1 is provided.
Further, the piping circuit unit 80 includes the fourth electromagnetic valve V4 and the recovery tank 3, the merging portion Q (the first piping portion 11, the second piping portion 12, and the merging piping portion 81) and the fifth electromagnetic valve V5. There is a cleaning pipe part 89 connected via a (pipe cleaning solenoid valve). That is, the cleaning pipe section 89 connects the recovery tank 3 and the merging section Q via the fifth electromagnetic valve V5.
Further, a sixth solenoid valve (first oil supply solenoid valve) V6 is interposed in the first oil supply piping section 86, and a seventh solenoid valve (second oil supply solenoid) is connected to the second oil supply piping section 87. Valve) V7 is interposed, and an eighth solenoid valve (supplementary refrigerant supply solenoid valve) V8 is interposed in the supplementary refrigerant supply piping section 88.

The recovery and regeneration piping circuit unit 82 separates the refrigerant fluid mixed with oil (refrigeration machine oil) recovered from the vehicle air conditioner S into oil and refrigerant, liquefies the refrigerant from which the oil has been separated, and sends it to the recovery tank 3 This is a piping circuit.
Specifically, an oil separator 82a connected to the merging pipe portion 81 via a check valve Ba, a compressor C connected to the outlet side of the oil separator 82a via a dry filter 82b, and a compressor C A heat exchanger (condenser) 82d disposed in the oil separator 82a and connected to the compressor outlet via a compressor protection check valve 82c and a safety valve (not shown), and heat disposed outside the oil separator 82a. A liquefier (fin condenser) 82e disposed between the exchanger 82d and the recovery tank 3, a ninth electromagnetic valve (regeneration electromagnetic valve) V9 disposed between the liquefier 82e and the recovery tank 3, have.

  In addition, the piping circuit unit 80 includes a vacuuming piping circuit unit 90 having a vacuuming pump P connected to the merging unit Q (the first piping unit 11, the second piping unit 12, and the merging piping unit 81). doing. The evacuation piping circuit unit 90 includes a tenth solenoid valve (a evacuation solenoid valve) V10 between the junction Q and the pump P. The piping circuit section 80 has a pressure equalizing piping section 84 that connects the merging piping section 81 and the discharge side of the compressor C via an eleventh solenoid valve (pressure equalizing solenoid valve) V11. Further, it has a liquefied refrigerant charging pipe part 83 and a circulation pipe part 85 for connecting the inlet side of the oil separator 82a via a twelfth solenoid valve V12 (circulation solenoid valve). Further, a negative pressure purge piping section having a thirteenth electromagnetic valve (negative pressure purge solenoid valve) is connected between the tenth solenoid valve V10 and the pump P. A pressure sensor, a pressure gauge, a safety valve, a drain pipe, etc. are not shown.

  The first and second hoses 1 and 2 and the piping circuit unit 80 can recover the refrigerant from the vehicle air conditioner S and perform a regeneration process. As shown in FIG. In the regeneration step), the first joint member 10 of the first hose 1 is connected to the high-pressure service valve Sa, and the second joint member 20 of the second hose 2 is connected to the low-pressure service valve Sb. And a control part controls opening and closing of each solenoid valve. Specifically, the first, second, third, and ninth solenoid valves V1, V2, V3, and V9 are opened, and the fourth, fifth, sixth, seventh, eighth, tenth, and eleventh.・ Twelfth and thirteenth solenoid valves V4, V5, V6, V7, V8, V10, V11, V12, and V13 are closed. Then, the control unit drives the compressor C.

  In the recovery and regeneration process, as shown by a thick line in FIG. 1, the oil-mixed refrigerant (fluid) in the vehicle air conditioner S flows through the first hose 1 and the first piping portion 11 to the merging piping portion 81. At the same time, it flows through the second hose 2 and the second piping portion 12 to the merging piping portion 81. Further, the refrigerant flows through the recovery / regeneration piping circuit unit 82, the oil is removed and a regeneration process is performed, and the refrigerant is stored in the recovery tank 3 as a liquefied refrigerant (liquefied chlorofluorocarbon).

Further, although the vehicle air conditioner S has been reduced to near atmospheric pressure (near) by the recovery and regeneration process, the vehicle air conditioner S can be evacuated to a vacuum state (lower than atmospheric pressure). When vacuuming (evacuation step), although not shown, the first joint member 10 of the first hose 1 is connected to the high pressure service valve Sa, and the second joint member 20 of the second hose 2 is connected to the low pressure service. Connect to the valve Sb (for example, after the recovery and regeneration step). The control unit controls opening and closing of each solenoid valve. Specifically, the first, second and tenth solenoid valves V1, V2 and V10 are opened, and the third, fourth, fifth, sixth, seventh, eighth, ninth, eleventh and eleventh. 12. Thirteenth solenoid valve V3, V4, V5, V6, V7, V8, V9, V11, V12, V13 are closed. And a control part makes the compressor C a stop state, and operates the pump P for vacuuming.
In the evacuation step, the fluid in the vehicle air conditioner S flows from the high pressure service valve Sa through the first hose 1 and the first piping portion 11 to the junction Q and from the low pressure service valve Sb to the second hose 2 and the second. It flows through the piping part 12 and heads for the joining part Q. Further, it flows from the junction Q to the vacuum pump P through the vacuum solenoid valve V10, and then discharged to the atmosphere (outside the fluid recovery / regeneration / filling device).
Thus, the water | moisture content (unnecessary liquid) in the vehicle air conditioner S can be removed by performing a evacuation process. Further, the interior of the vehicle air conditioner S can be made lower in pressure (negative pressure) than the interior of the first and second hoses 1 and 2 and the piping circuit section 80, and the oil filling process and the regenerated liquefied refrigerant filling process described later can be performed reliably and smoothly. Will be able to do.

Further, when the vehicle air conditioner S can be filled with the vehicle air conditioner oil, and the vehicle air conditioner oil is filled (oil filling step) as shown in FIG. The joint member 10 is connected to the high pressure service valve Sa, and the second joint member 20 of the second hose 2 is connected to the low pressure service valve Sb. The first oil can 96 is connected to the first charge unit 6 or the second oil can 97 is connected to the second charge unit 7. The control unit controls opening and closing of each solenoid valve. For example, as shown in FIG. 2, when the first oil can 96 is connected to the first charging unit 6, the first, third, and sixth solenoid valves V1, V3, and V6 are opened, and the second and second solenoid valves 96 are opened. 4th, 5th, 7th, 8th, 9th, 10th, 11th, 12th, 13th solenoid valves V2, V4, V5, V7, V8, V9, V10, V11, V12, V13 are closed To do.
Due to the internal pressure of the first oil can 96 and by setting the inside of the piping of the vehicle air conditioner S to a pressure lower than that of the piping circuit unit 80 in advance, the first oil is supplied to the first charging unit (as indicated by the bold line in FIG. 2). 6, the first oil supply piping section 86, and the merging piping section 81 from the connecting section to the merging section Q of the first oil supply piping section 86, the first piping section 11, and the first hose 1. The vehicle air conditioner S is filled from the high pressure service valve Sa side.

  Although not shown, when the second oil can 97 is connected to the second charging unit 7, the control unit opens the first, third, and seventh solenoid valves V1, V3, V7, and 2, 4th, 5th, 6th, 8th, 9th, 10th, 11th, 12th, 13th solenoid valves V2, V4, V5, V6, V8, V9, V10, V11, V12, V13 Close. The second oil is connected to the second charging section 7, the second oil supply pipe section 87, the connecting section from the second oil supply piping section 87 to the confluence section Q in the merging pipe section 81, the first piping section 11, 1 hose 1 and the vehicle air conditioner S is filled from the high-pressure service valve Sa side.

Further, when the vehicle air conditioner S can be filled with the recovered and regenerated refrigerant and the regenerated liquefied refrigerant is filled (regenerated liquefied refrigerant filling step) as shown in FIG. 3, the first joint member of the first hose 1 is used. 10 is connected to the high pressure service valve Sa, and the second joint member 20 of the second hose 2 is connected to the low pressure service valve Sb. The control unit controls opening and closing of each solenoid valve. Specifically, the fourth solenoid valve V4 is opened, and the first, second, third, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth. The solenoid valves V1, V2, V3, V5, V6, V7, V8, V9, V10, V11, V12, and V13 are closed.
The liquefied refrigerant in the recovery tank 3 is liquefied by the internal pressure of the recovery tank 3 and by making the inside of the piping of the vehicle air conditioner S lower in pressure than the piping circuit section 80 in advance (as shown by a thick line in FIG. 3). The high-pressure service of the vehicle air conditioner S flows through the filling pipe 83 and the first hose 1 from the connecting portion of the first piping portion 11 to the liquefied refrigerant filling piping portion 83 to the connecting portion of the first hose 1. It is filled from the valve Sa side.

Furthermore, the liquefied refrigerant in the recovery tank 3 can be sent to the first charging unit 6 and the second charging unit 7 to clean the inside of the pipe. As shown in FIG. A first conversion joint 60 for connecting one joint member 10 to the first charge part 6; a second conversion joint 70 for connecting the second joint member 20 of the second hose 2 to the second charge part 7; It has.
When the liquid refrigerant is washed through the first charging unit 6 and the second charging unit 7 (oil supply unit washing step), the first joint member 10 of the first hose 1 is connected via the first conversion joint 60. Connected to the first charging unit 6, the second joint member 20 of the second hose 2 can be connected to the second charging unit 7 via the second conversion joint 70. Each electromagnetic valve is controlled to open and close by the control unit. Specifically, the first, second, fifth, sixth, seventh, and ninth solenoid valves V1, V2, V5, V6, V7, and V9 are opened, and the third, fourth, eighth, and eighth solenoid valves are opened. The 10th, 11th, 12th, and 13th solenoid valves V3, V4, V8, V10, V11, V12, and V13 are closed. Further, the control unit drives the compressor C.

  In the oil supply section cleaning step, the liquefied refrigerant in the recovery tank 3 is transferred from the recovery tank 3 side to the cleaning pipe section 89 from the fourth electromagnetic valve V4 in the liquefied refrigerant charging pipe section 83 (as indicated by the thick line in FIG. 4). The flow further flows through the merging portion Q through the first piping portion 11, the first hose 1, the first conversion joint 60, the first charging portion 6, and the first oil supply piping portion 86, and the second piping portion 12 , The second hose 2, the second conversion joint 70, the second charging portion 7, and the second oil supply piping portion 87, and then the check valve from the connecting portion with the first oil supply piping portion 86 in the merging piping portion 81. Flows up to Ba (from the third electromagnetic valve V3 to the recovery and regeneration piping circuit 82 side). Further, the refrigerant is circulated in the compressor C so as to flow from the merging pipe part 81 through the recovery / regeneration pipe circuit part 82 via the check valve Ba, return to the recovery tank 3, and again through the liquefied refrigerant charging pipe part 83. That is, the first charging unit 6 and the second charging unit 7 are connected to the upper part (inlet) of the recovery tank 3 via the recovery / regeneration piping circuit unit 82, and the first piping unit 11 and the second piping unit 12 (first piping). The hose 1 and the base end side of the second hose 2) and the lower part (discharge port) of the recovery tank 3 are provided so as to be connectable via a pipe cleaning electromagnetic valve V5, and the tip end side of the first hose 1 is connected to the first side. The second charge hose 2 can be connected to the first charge unit 6 and the front end side of the second hose 2 can be connected to the second charge unit 7 so as to form a closed circulation circuit (annular circuit) for cleaning with liquefied refrigerant. .

  Further, the liquefied refrigerant in the recovery tank 3 can be washed by being sent to the third electromagnetic valve V3, and when the inside of the third electromagnetic valve V3 is washed as shown in FIG. In the step), for example, after the oil supply unit cleaning step described above, the control unit controls the opening and closing of each solenoid valve. Specifically, the third, fifth, and ninth solenoid valves V3, V5, and V9 are opened, and the first, second, fourth, sixth, seventh, eighth, tenth, eleventh, and eleventh. 12 ・ 13th solenoid valve V1, V2, V4, V6, V7, V8, V10, V11, V12, V13 are closed. Further, the control unit drives the compressor C.

  In the merging solenoid valve cleaning step, the liquefied refrigerant in the recovery tank 3 is moved from the liquefied refrigerant charging piping section 83 to the cleaning piping section 89, the merging section Q, and the third electromagnetic valve V3 (as shown by a thick line in FIG. 5). So that it flows through the merging pipe part 81 so as to pass, and then flows through the recovery and regeneration pipe circuit part 82 via the check valve Ba, returns to the recovery tank 3, and flows again through the liquefied refrigerant charging pipe part 83. It circulates in the compressor C.

Here, the oil charged in the vehicle air conditioner S together with the liquefied refrigerant varies depending on the type of the vehicle. For example, in many vehicles driven only by an internal combustion engine such as a reciprocating engine or a rotary engine, polyalkylene glycol (PAG) oil is used, and a vehicle using a combination of an internal combustion engine and an electric motor (a vehicle called a hybrid vehicle) or an electric motor. Many of the electric vehicles that are driven solely use polyol ester (POE) oil having high insulation properties.
Therefore, after the operation of filling a vehicle (reciprocating vehicle) driven only by a reciprocating engine with PAG oil (for example, corresponding to the first oil), the hybrid vehicle is charged with POE oil (for example, corresponding to the second oil). When the work is performed, the PAG oil (first oil) remaining in the piping during the work in the reciprocating vehicle is mixed with the POE oil (second oil) and filled, and the appropriate oil performance (insulation characteristics and lubrication characteristics) ) May not be obtained.
However, by performing the above-described oil filling pipe cleaning step (oil supply section cleaning step and merging solenoid valve cleaning step) before the oil filling step, there is a high possibility that the oil in the previous work remains. The liquefied refrigerant is allowed to flow through the (first charging unit 6, the first oil supply piping unit 86, the second charging unit 7, the second oil supply piping unit 87, and the merged piping unit 81), and the performance of the oil can be improved. Mixing that can be damaged can be prevented. In particular, in the oil supply section cleaning step, there is a high possibility that oil will remain and mix, between the downstream side of the sixth solenoid valve V6 and the merging pipe section 81 (downstream area 86b of the first oil supply pipe section 86), 7 between the solenoid valve V7 and the merging pipe part 81 (the downstream area 87b of the second oil supply pipe part 87) can be cleaned. Further, the merging solenoid valve cleaning step can clean the inside of the third solenoid valve V3 even though the residual amount of oil is small. The liquefied refrigerant mixed with oil in the oil-filled piping cleaning step is regenerated in the recovery and regeneration piping circuit unit 82, and therefore can be used in the regenerated liquefied refrigerant charging step after cleaning.

  Next, in FIG. 6 and FIG. 7, the first and second charging portions 6, 7 are formed in a cylindrical shape, and have injection needle-like piercing blades 63, 73 for opening the can, and rushing blades 63, 73. And cylindrical wall portions 64 and 74 having female screw portions 64a and 74a that are screwed into the male screw port portions 96a and 97a of the first and second oil cans 96 and 97 (can screwed). ing. In addition, it has connecting screw parts 65 and 75 for coaxial connection with cylindrical connecting pipe members forming the first and second oil supply pipe parts 86 and 87 on the base end side, and prevents backflow inside. It has valves (mechanisms) 66 and 76.

  The first and second oil cans 96 and 97 include male screw ports 96a and 97a for discharging internal oil to the outside, and thin (film) lid portions 96b and 97b that close the male screw ports 96a and 97a. And annular protective projections 96c and 97c for protecting the male screw port openings 96a and 97a in a surrounding manner, and may be called a service can.

  6 to 8, first can detecting means 62 for detecting whether or not the first oil can 96 is connected to the first charging unit 6, and second oil to the second charging unit 7. Second can detecting means 72 for detecting whether or not the can 97 is connected.

  The first and second can detectors 62 and 72 include first and second movable cylinders 67 and 77 that are loosely fitted so as to surround the first and second charging units 6 and 7, and the first and second First and second springs 68 and 78 for resiliently urging the base-side annular end surface (elastic force receiving surface) of the cylindrical portion of the movable cylindrical bodies 67 and 77 toward the distal end side (one axial direction side) Na; , First and second can detection limit switches L3 and L4 disposed in the vicinity of (adjacent to) the first and second movable cylinders 67 and 77. The first and second springs 68 and 78 are formed of coil springs, and are arranged on the connecting piping material from the outside in a loose fit.

The first and second movable cylinders 67 and 77 are cylindrically fitted to the first and second charge parts 6 and 7 so as to be freely slidable in the axial direction, and project from the cylindrical part radially outwardly. The second can detection limit switches L3 and L4 have plate-like operation (pressing) protrusions 67a and 77a for operating (pushing) the switch lever portion projecting.
The cylindrical portions of the first and second movable cylinders 67 and 77 are formed by male screw openings 96a and 97a of the first and second oil cans 96 and 97 and female screw portions 64a of the first and second charge portions 6 and 7, respectively. , 74a are screwed together to have annular pressure receiving surfaces 67c, 77c that are pressed against the protective projections 96c, 97c.

  In a free state where the first and second oil cans 96 and 97 are not connected to the first and second charging portions 6 and 7, the first and second movable cylinders 67 and 77 are respectively connected to the first and second springs 68. 78, the pressure receiving surfaces 67c and 77c are provided so as to be disposed on the axial center one direction side (outside of the apparatus main body) Na with respect to the front end surfaces of the first and second charging portions 6 and 7.

  Then, as shown in FIG. 8, the first can detection means 62 has a thin lid portion by means of the rush blade 63 of the first charging portion 6 so that the first oil can 96 and the inside of the first charging portion 6 communicate with each other. In a suitable connection state in which the male screw port portion 96a is screwed to the female screw portion 64a until the position where the 96b is opened, the protective convex portion 96c presses the pressure receiving surface 67c, whereby the first movable cylinder 67 is predetermined. The first can detection slide size is configured to move to the other side (inside of the apparatus main body) Nb of the shaft center. Along with the movement, the operation protrusion 67a operates the first can detection limit switch L3 so that the first can detection signal is transmitted to the control unit. That is, the first movable cylinder 67 is lowered by the screwing of the first oil can 96, and the first can detection limit switch L3 is turned ON.

  The second can detection means 72 has the same configuration and operation as the first can detection means 62, and although not shown, the second oil can 97 and the second charging unit 7 are in an appropriate connection state and the second can The movable cylinder 77 is configured to move to the other side (base end side) Nb of the shaft center by a predetermined second can detection slide size. Along with the movement, the operation protrusion 77a operates the second can detection limit switch L4 so that the second can detection signal is transmitted to the control unit. That is, the second movable cylinder 77 is lowered by the screwing of the second oil can 97, and the second can detection limit switch L4 is turned ON.

When the control unit receives the first can detection signal or the second can detection signal, the control unit transmits the received can detection signal to the first oil can 96 and the second oil in the storage unit electrically connected to the control unit. It is provided so as to be stored as previous oil type information which means which of the cans 97 is connected (which of the first oil and the second oil is filled).
Then, when filling the oil for the next (new) vehicle, the control unit selects and inputs the oil to be filled in the operation unit, or the newly received can detection signal, and the storage unit Compared with the previous oil type information read out from, when the oil type is different, an alarm or instruction is displayed on the display unit so as to perform the oil-filled pipe cleaning process. Further, the compressor C and the solenoid valve are controlled so that the oil filling process cannot be performed unless the oil filling pipe cleaning process is performed.
Furthermore, the control unit stores in the storage unit whether or not the oil filling pipe cleaning process has been performed after the previous oil filling, and if the oil filling pipe cleaning process has been performed after the oil filling process in the previous operation. Even if the type of oil used for a new oil filling operation (process) is different, a new oil filling process can be performed without performing a new oil filling pipe cleaning process.

Further, as shown in FIGS. 9 and 10, the female screw portions 64a and 74a of the first and second charge portions 6 and 7 are the first for connecting the first and second joint members 10 and 20 detachably. The second conversion joints 60 and 70 can be screwed.
The first and second joint members 10 and 20 are female-side joints of a plug-in connection type male and female joint unit, which is also called a one-touch joint or a quick connection joint, and specifically, a female coupler.
The first and second conversion joints 60 and 70 have male screw parts 60a and 70a that can be screwed to the female screw parts 64a and 74a of the first and second charge parts 6 and 7, and the first and second joints. The members 10 and 20 have a cylindrical shape having detachable insertion male parts 60b and 70b from the first and second charge parts 6 and 7 side to the first and second joint members 10 and 20 side. It has a check valve (mechanism) that prevents backflow. Further, a cap member that protects the rush blades 63 and 73 (prevents clogging with dust or the like) by screwing in the non-use state (in the storage state or movement) of the first and second charge portions 6 and 7. Used as (used together). Also, the plug male part 60b of the first conversion joint 60 has the same standard size as the plug male part of the high-pressure service valve (male coupler) Sa (male side joint of the female plug joint unit). Forming. The insertion male part 70b of the second conversion joint 70 is formed in the same standard size (in accordance with) as the insertion male part of the low pressure service valve (male coupler) Sb.

  Then, a first joint detecting means 61 for detecting whether or not the first joint member 10 is connected to the first charge part 6 and whether or not the second joint member 20 is connected to the second charge part 7. Second joint detecting means 71 for detecting.

  The first and second joint detection means 61 and 71 are in the vicinity of the first and second movable cylinders 67 and 77, the first and second springs 68 and 78, and the first and second movable cylinders 67 and 77. The first and second joint detection limit switches L1 and L2 are disposed (adjacently).

Then, as shown in FIG. 10, the first and second joint detecting means 61 and 71 are arranged so that the first and second joint members 10 and 20 and the first and second charge portions 6 and 7 communicate with each other. The first and second movable cylinders are formed by the distal end surfaces 10a and 20a of the first and second joint members 10 and 20 pressing the pressure-receiving surfaces 67c and 77c in a properly connected state (attached). The bodies 67 and 77 are configured to move to the base end side (the other side of the shaft center) Nb by the first and second joint detection slide dimensions smaller than the first and second can detection slide dimensions described above.
In other words, the annular tip surfaces 10a and 20a of the first and second joint members 10 and 20 make the first and second movable cylinders 67 and 77 smaller than the first and second can detection slide dimensions. The lengths in the axial direction of the first and second conversion joints 60 and 70 are set so as to move toward the base end side (the other side of the shaft center) Nb by the first and second joint detection slide dimensions.
When the first and second movable cylinders 67 and 77 are moved by the first and second joint detection slide dimensions, the operation protrusions 67a and 77a are moved to the first and second joint detection limit switches L1 and L2 (is projected. The first and second joint detection signals are transmitted to the control unit without operating the first and second can detection limit switches L3 and L4. It is composed.

That is, the first and second movable cylinders 67 and 77 are members for operating (turning on) the first and second joint detection limit switches L1 and L2, and the first and second can detection limit switches L3 and L2. A member that operates (turns on) L4 in combination (shared).
When the first and second can detection limit switches L3 and L4 are operated, the first and second joint detection limit switches L1 and L2 are operated by the operation protrusions 67a and 77a. The can detection signal is prioritized by the program, the relay circuit, or the like so that it is recognized that the can is connected, not the joint connected.
And the control part is provided so that an oil filling piping washing | cleaning process may be performed when reception of both the 1st and 2nd joint detection signals is confirmed. In addition, when one or both of the first joint detection signal and the second joint detection signal cannot be confirmed, the joint connection is not performed even if the user performs an oil-filled pipe cleaning process at the operation unit. You may display on the display part the warning which is not completed, and the instruction | indication which prompts to connect a coupling appropriately. When the first and second oil cans 96 and 97 and the first and second joint members 10 and 20 are detached from the first and second charge portions 6 and 7, the first and second springs 68 and 78 are elastically released. Due to the force, the first and second movable cylinders 67 and 77 return to their original positions.

  The present invention can be modified in design, and the recovery / regeneration piping circuit unit 82 may be a circuit other than that shown in the figure as long as the recovered refrigerant can be regenerated. By making the inside of the piping of the vehicle air conditioner S lower than the piping circuit section 80 in the filling process, liquefied refrigerant or oil does not flow from the merging piping section 81 to the recovery and regeneration piping circuit section 82, but is liquefied in the filling process. A backflow preventing solenoid valve that is closed may be provided between the merging pipe part 81 and the recovery / regeneration pipe circuit part 82 so as to prevent refrigerant or oil from flowing into the recovery / regeneration pipe circuit part 82.

  As described above, the fluid recovery / regeneration / filling device of the present invention includes the first hose 1 having the first joint member 10 detachably attached to the high pressure service valve Sa of the vehicle air conditioner S, and the low pressure service valve Sb of the vehicle air conditioner S. In a fluid recovery / regeneration / filling device including a second hose 2 having a second joint member 20 detachably attached to the vehicle and a recovery tank 3 for storing fluid recovered from the vehicle air conditioner S, the first oil is The first charge valve main body 6 to which the filled first oil can 96 can be connected, and the second charge valve main body to which the second oil can 97 filled with a second oil of a different type from the first oil can be connected. 7, and the first joint member 10 of the first hose 1 is connected to the first charge valve body 6, and the second joint member 20 of the second hose 2 is connected to the second charge valve body 7, The fluid in the collection tank 3 Since it is configured to perform first charge valve flow sent to the main body 6 and the second charge valve body 7 by washing, the pipe the oil flows easily and quickly cleaned. Oil remaining in the pipe can be removed reliably. A single unit can handle multiple types of oil filling operations. That is, it is not necessary to own a plurality of fluid collection / regeneration / filling devices according to the type of oil, and maintenance work and costs can be reduced. It can be cleaned using (and used in combination) the piping used in the recovery and recycling process and the filling process, contributing to a reduction in the number of parts and weight reduction.

  Further, a first conversion joint 60 for connecting the first joint member 10 and the first charge valve body 6 and a second conversion joint 70 for connecting the second joint member 20 and the second charge valve body 7 are used. Therefore, the operation can be performed easily and quickly. It can be cleaned using (and used in combination) the piping used in the recovery and regeneration process and the filling process, contributing to the downsizing and weight reduction of the apparatus.

  Further, first joint detecting means 61 for detecting whether or not the first joint member 10 is connected to the first charge valve body 6 and whether or not the second joint member 20 is connected to the second charge valve body 7. The second joint detecting means 71 for detecting whether or not the first and second hoses 1 and 2 and the first and second charge valve bodies 6 and 7 are forgotten to be connected, and the pipe cleaning process Can be reliably and efficiently performed without mistakes.

1 1st hose 2 2nd hose 3 recovery tank 6 1st charge valve body 7 2nd charge valve body
10 First joint member
20 Second joint member
60 First conversion fitting
61 First joint detection means
70 Second conversion fitting
71 Second joint detection means
81 Junction piping
82 Recovery and recycling piping circuit
86 1st oil supply piping
87 Second oil supply piping
89 Cleaning pipe
96 1st oil can
97 2nd oil can S Vehicle air conditioner Sa High pressure service valve Sb Low pressure service valve

Claims (3)

A first hose (1) having a first joint member (10) detachably attached to a high-pressure service valve (Sa) of a vehicle air conditioner (S) on a distal end side, and a low-pressure service valve (Sb) of the vehicle air conditioner (S) ), A second hose (2) having a detachable second joint member (20) on the distal end side, and a merging pipe connected to the proximal ends of the first hose (1) and the second hose (2). And a recovery / regeneration piping circuit unit (82) connected to the merging piping unit (81) for separating and liquefying the oil-mixed refrigerant recovered from the vehicle air conditioner (S) into oil and refrigerant. A recovery tank (3) for storing the refrigerant liquefied in the recovery / regeneration piping circuit section (82 ), proximal ends of the first hose (1) and the second hose (2), and the recovery tank cleaning pipe portion for connecting (3) and (89), the first oil is filled First and oil can (96) a first charge valve body which can be connected (6), the first oil supply pipe portion for connecting the first charge valve body (6) the collecting pipe and (81) that ( 86), a second charge valve body (7) connectable to a second oil can (97) filled with a second oil of a different type from the first oil, and the second charge valve body (7) And a second oil supply pipe part (87) for connecting the merging pipe part (81) ,
The first joint member (10) of the first hose (1) is connected to the high pressure service valve (Sa), and the second joint member (20) of the second hose (2) is connected to the low pressure service valve (Sa). In the state connected to Sb), the oil-mixed refrigerant in the vehicle air conditioner (S) is collected from the first hose (1) and the second hose (2) through the junction pipe (81). The first charge valve body connected to the first oil can (96), wherein the first oil can (96) is connected to the regeneration piping circuit portion (82), regenerated as a liquefied refrigerant and recovered in the recovery tank (3). From (6), the vehicle air conditioner (S) is filled with the first oil via the first oil supply pipe (86), the junction pipe (81) and the first hose (1). The second char to which the second oil can (97) is connected The vehicle air conditioner (S) is filled with the second oil from the divalve body (7) through the second oil supply pipe (87), the junction pipe (81) and the first hose (1). Configure
Further, the first joint member (10) of the first hose (1) is connected to the first charge valve body (6), and the second joint member (20) of the second hose (2) is connected to the first hose (2). In a state where it is connected to the second charge valve body (7), the liquefied refrigerant in the recovery tank (3) is transferred from the recovery tank (3) through the cleaning pipe section (89) to the first charge. The hose (1), the first charge valve body (6), and the first oil supply pipe (86) are sent to the second hose (2), the second charge valve body (7), and the is flow sending to the second oil supply pipe section (87), said recovered liquid refrigerant from the first oil supply pipe section (86) and the second oil supply pipe section (87) the collecting pipe and (81) Play piping circuit section via (82) washed back to the collection tank (3) Fluid recovery reproducing filling apparatus being characterized in that configured to perform.   A first conversion joint (60) for connecting the first joint member (10) and the first charge valve body (6), the second joint member (20), and the second charge valve body (7 And a second conversion joint (70) for connecting to the fluid recovery and refilling device according to claim 1.   First joint detecting means (61) for detecting whether or not the first joint member (10) is connected to the first charge valve main body (6), and the second charge valve main body (7) with the second The fluid recovery / regeneration / filling device according to claim 1 or 2, further comprising: a second joint detection means (71) for detecting whether or not the two joint members (20) are connected.

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