KR20050091778A - Air conditioner flon recovery, regeneration, filling device, and air conditioner lubrication oil replenishing method - Google Patents

Abstract

A system oil separator oil separating section, and heat exchange sections for a filter drier, a compressor and a system oil separator are at least installed in a pipeline that removably connects a high pressure side connector and flon tank to the high pressure side of the flon filling port of an air conditioner, and a pipeline opening/closing device is installed in a predetermined region, thereby constituting a flon recovery system. And when flon is to be recovered from the air conditioner by the flon recovery system, oil is replenished via the low pressure side of the oil filling port by utilization of flon recovery pressure from the flon filling port connected through a check valve adapted to open when acted on by a predetermined pressure to a pipeline that removably connects a low pressure side connector and flon tank to the low pressure side of the flon filling port of an air conditioner.

Description

Recovery, regeneration and filling equipment for air conditioners and refilling oils for air conditioners {AIR CONDITIONER FLON RECOVERY, REGENERATION, FILLING DEVICE, AND AIR CONDITIONER LUBRICATION OIL REPLENISHING METHOD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology that makes it possible to easily and quickly replenish the lubricating oil for an air conditioner such as a car air conditioner (hereinafter referred to as an "air conditioner").

In general, about 50 to 300 g of compressor lubricating oil is mixed in the cooling system of the air conditioner as an air conditioner, in addition to the refrigerant (pron gas). Some of the oil is attached to compressors, piping, etc., while the other oil is circulated in the cooling system with the prongas. By the way, it is known that the proton gas of an air conditioner mixes moisture etc. with the use of many years, and the refrigerant function is gradually reduced. For this reason, as disclosed in Japanese Patent Application Laid-Open No. 4-165273, a refreshing technique for recovering the proton gas recovered from an air conditioner by removing moisture or oil from a dryer and an oil separator and restoring its refrigerant function Is proposed.

However, in the case of recovering prongas from the air conditioner, about 0 to 30 g of oil is also recovered with the prongas in one operation. In addition, in the air conditioner, gas leakage of about 20 to 100 g / year occurs mainly in the piping, packing, and the like of the cooling system due to engine vibration and shaking during running. For this reason, in the air conditioner, the oil is recovered or discharged along with the proton gas, and the amount of oil in the cooling system is also gradually reduced, so it is necessary to replenish the oil regularly.

As a method for replenishing the oil, (1) after recovering the prongas, vacuuming the inside of the cooling system to a vacuum state with a vacuum pump or the like, and replenishing the oil by using a negative pressure, and (2) the air while the proton gas is filled. A method of replenishing from the low pressure side using a conditioner compressor is known, but since the work is complicated and requires hand, it cannot be performed by an experienced worker.

In view of the above-described conventional problems, the present invention automatically replenishes oil by using the recovery pressure when recovering a prone from an air conditioner, so that oil replenishment can be carried out easily and promptly even by a skilled worker. It is an object of the present invention to provide a method for recovering, regenerating, and filling the air conditioning equipment prone and replenishing the oil for lubricating the air conditioning equipment.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the collection | recovery, reproduction, and charging apparatus of the air conditioner prone which concerns on this invention.

2 is a detailed view of a scale for measuring the weight of a prone tank.

3 is a flowchart showing the recycling front recovery sequence control.

4 is an explanatory diagram of a pron recovery system.

Fig. 5 is a flowchart showing the recycling front playback order control.

6 is an explanatory diagram of a prone regeneration system.

Fig. 7 is a flowchart showing the recycling front filling order control.

8 is an explanatory diagram of a prone filling system.

9 is a flowchart showing the recovery procedure control of the recycle residual gas.

10 is an explanatory diagram of a residual gas recovery system.

11 is a flowchart showing recycle oil discharge sequence control.

12 is an explanatory diagram of an oil discharge system.

13 is a flowchart showing oil replenishment order control.

14 is an explanatory diagram of an oil replenishment system.

Fig. 15 is a flowchart showing prolon dispensing order control.

It is explanatory drawing of a fron supply system.

Fig. 17 is a flowchart showing prolon replenishment order control.

18 is an explanatory diagram of a pron replenishment line.

19 is a flowchart showing the regeneration cleaning procedure control.

20 is an explanatory diagram of a prone regeneration system.

21 is a flowchart showing regeneration residual gas recovery procedure control.

It is explanatory drawing of the vacuum system in a repair shop mode.

It is explanatory drawing of the fron regeneration system in a repair shop mode.

It is explanatory drawing of the fron filling system in a repair shop mode.

For this reason, the apparatus for recovering, regenerating, and filling the fron for an air conditioner according to the present invention includes a fron recovery system for recovering the fron from the air conditioner to the fron tank, a fron regeneration system for regenerating the fron in the fron tank, and a fron in the fron tank. There is a fron filling system for filling the air conditioner and a fron replenishment system for replenishing the fron tank. That is, in the prone recovery system, the oil separation part of the system oil separator, the filter drier, the compressor, and the system oil are connected to the first pipe connecting the high pressure side connector and the prone tank, which are detachably connected to the high pressure side of the prone filling port of the air conditioner. At least the heat exchange part of the separator is provided, and at the same time, a pipe opening and closing device is provided. In the prone regeneration system, at least the oil separation part of the system oil separator, the filter drier, the compressor, and the system oil separator which are common to the prone recovery system are installed in the second pipe from the prone tank and return to the prone tank. Piping switchgear is installed. In the prone filling system, at least a pipe opening and closing device is provided at a predetermined portion of the third pipe connecting the prone tank and the high pressure side connector. In the prone replenishment system, at least a pipe opening and closing device is provided at a predetermined portion of the fourth pipe connecting the storage side connector and the prone tank, which are detachably connected to the low pressure side of the prone filling port of the air conditioner. The oil refill port is connected to the fourth pipe via a check valve that opens the valve when a predetermined pressure is applied.

According to this constitution, when the high pressure side connector is connected to the high pressure side of the prone filling port of the air conditioner, for example, the operation panel is operated, the prone of the air conditioner is automatically recovered, regenerated and It can be charged. In the case of recovering the prone from the air conditioner, if the low pressure side connector is connected to the low pressure side of the prone filling port of the air conditioner, and the oil can is connected to the oil refilling port, the air conditioner is used from the oil can using the prone recovery pressure. Oil can be added automatically. For this reason, oil replenishment can be performed easily and quickly even without an experienced worker. Further, the oil replenishment system is provided with a check valve that opens the valve only when a predetermined tension is applied in the oil replenishment direction, so that the atmosphere can be prevented from being introduced into the pipe when the oil can is not connected.

In addition, the first opening and closing device for periodically opening and closing the fifth pipe to the fifth pipe connected to the purge port of the fron tank, and the agent for opening the valve when the pressure difference between the pressure in the fron tank and the reference pressure is greater than or equal to a predetermined value. It is preferable to install 2 switchgear in series. According to this structure, the non-condensable gas which accumulates in the upper part of a fron tank is discharged at an appropriate timing. In other words, if the non-condensable gas accumulated in the upper portion of the fron tank is small by simply opening and closing the fifth pipe on a regular basis, the inside of the atmosphere remains open even after the non-condensed gas is discharged. There is concern. On the other hand, just opening the valve when the pressure difference between the internal pressure of the tank and the reference pressure is greater than or equal to the predetermined value may cause the temperature to be opened regardless of the presence or absence of non-condensable gas. It may be released into the atmosphere. However, by providing such a structure together, the conditions for purging the non-condensable gas collected in the upper portion of the pron tank are optimized, and it is extremely possible to suppress the discharge of the pron gas into the atmosphere. At this time, the reference pressure is preferably temperature compensated in accordance with the temperature of the prone to be recovered to the pron tank. In this way, even if the ambient temperature changes, the second switching device can be prevented from malfunctioning and opening of the valve.

At this time, a pressure detecting device for detecting whether the tension in the pipe is within a predetermined range is connected to the high pressure side connector, and when the pressure detecting device detects that the pressure in the pipe is within a predetermined range, the prone recovery system It is preferable to have a control device for executing prone collection by the.

According to this configuration, since the prone recovery is performed only when the pressure in the piping near the high-pressure connector is within a predetermined range, the prone recovery is not performed when there is no prone in the air conditioner or when the hose is loose or cracked. The mixing of air as non-condensable gas can be prevented.

Moreover, it is preferable to connect the 1st tension detection apparatus which detects the pressure in piping in the vicinity of a high pressure side connector, and to connect the 2nd pressure detection apparatus which detects the pressure in piping in the vicinity of a low pressure side connector.

According to this configuration, when the air conditioner is operated while the high pressure side connector and the low pressure side connector are connected, the prone pressure on the high pressure side and the low pressure side is measured. For this reason, it is possible to diagnose the air conditioner without reconnecting the high pressure side connector and the low pressure side connector before and after the various operations, thereby reducing work time and reducing work effort.

Pron filling weight setting device for setting the prone filling weight corresponding to the type of air conditioner and the pron filling weight detection device for detecting the actual filling weight of the pron based on the output from the scale for measuring the weight of the tank. It is preferable to provide a stopper for stopping the prone charging by the prone filling system when the filling weight becomes the set prone filling weight. In this way, when the type of air conditioner is set to distinguish the type of air conditioner, the weight of the prone can be automatically filled.

At this time, the scale is connected to the upper surface of the load cell with an elastic member provided on the lower surface of the upper member with a mount having an upper member having a lower surface extending substantially on a horizontal surface and a lower member on which the fron tank is fixed. It is desirable to hang and weigh the prone tank.

According to such a structure, since the elastic body is provided in the lower surface of the upper member of the mount, even if the mount is inclined, the inclination is absorbed by the elastic body and the load acts almost perpendicularly to the upper surface of the load cell for measuring the weight. . For this reason, even if the mount is inclined, the weight of the fron tank can be measured with high accuracy. In addition, even when an impact such as vibration occurs on the mount, the impact is alleviated by the elastic body provided on the lower surface of the upper member, so that the impact transmitted directly to the load cell is greatly reduced. For this reason, the fall of the weight measurement precision of the load cell by an impact can be suppressed, and the effort required for maintenance inspection can be reduced.

On the other hand, as a replenishment method of the oil for lubricating the air conditioner according to the present invention, the oil separating part of the system oil separator, The low pressure side of the prone filling port of the air conditioner when the prolon is recovered from the air conditioner by at least the oil exchange part of the filter drier, the compressor and the system oil separator and at the same time, and the pipe return system installed in the predetermined part. When a predetermined tension is applied to the pipe connecting the low pressure side connector and the prone tank, which are freely attached to and detached from the low pressure side, the low pressure of the prone filling port is Fill the air conditioner with oil through the side.

According to this configuration, when recovering the prone from the air conditioner by the prone recovery system, the low pressure side connector is connected to the low pressure side of the prone filling port of the air conditioner, and the oil can is connected to the oil refilling port. By using the oil, the air conditioner can be automatically replenished from the oil can. For this reason, even if it is not an experienced worker, oil replenishment can be performed easily and quickly. Moreover, since the check valve which opens a valve only when a predetermined pressure acts in the oil refilling direction is provided in the oil replenishment system, it is possible to prevent air from being introduced into the pipe when the oil can is not connected.

Other objects and various aspects of the present invention will become apparent from the following description of the embodiments related to the accompanying drawings.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

An air conditioner prone recovery, regeneration, and charging device includes a prone recovery system, a prone regeneration system, a prone charging system, a prone replenishment system, and a prone replenishment system. The structure of each such system is demonstrated in order with reference to FIG. In addition, a prolon means a specific prolon, such as CFC (chlorofluorocarbon), or a replacement flon, such as HFC (hydrofluorocarbon).

The system oil separator (3) is connected to the first pipe connecting the high pressure fitting (1) (high pressure side connector) and the prone tank 2 to which the prone recovery system is detachably connected to the prone filling port (high pressure side) of the air conditioner. (3A), filter drier (4), compressor (5), heat exchanger (3B) of system oil separator (3), etc. It is configured by installation.

This configuration will be described in detail. The pipe 6 connected to the high pressure fitting 1 is turned on when the high pressure gauge 7 (first pressure detecting device) and the pressure in the pipe are in a predetermined range from upstream to downstream. The air protection switch C-SW (pressure detection device), the check valve CV-6, the solenoid valve SV-6 for recovery, and the vacuum switch V-SW which turn ON when the pressure in the piping is under the specified pressure are respectively provided. In addition, the tip of the pipe 6 is connected to the oil separation part 3A of the system oil separator 3. The oil drain bottle OT is connected to the bottom of the system oil separator 3 via the oil drain solenoid valve SV-7 so as to discharge the oil separated by the oil separating part 3A to the outside.

In the piping 8 downstream of the oil separation part 3A of the system oil separator 3, a filter drier 4, a valve 9 and a compressor 5 are respectively provided. As the compressor 5, it is preferable to use an oil compressor so that the management of oil exchange is unnecessary and the effort required for maintenance is reduced. The piping 10 downstream of the compressor 5 is connected to the high pressure switch H-SW and the safety valve 11 which turn on and open when the pressure in the piping reaches a predetermined pressure or more, and the front end of the system oil separator 3 is connected. It is connected to the heat exchange part 3B.

The piping 12 downstream of the heat exchange part 3B of the system oil separator 3 has an input solenoid valve SV-1, a check valve CV-1, a moisture indicator MI and an auto air purge AAP (second opening and closing) from upstream to downstream. Devices) are respectively provided, and the front end thereof is connected to the gas port 2A of the pron tank 2. The auto air purge AAP is connected to the purge port 2B of the fron tank 2 with the piping 13 (fifth piping) provided with the solenoid valve SV-3 (first opening / closing device) for air purging interposed. In addition, the auto air purge AAP is valve-opened to open the inside of the fron tank 2 when the pressure difference between the built-in new product fron pressure (reference pressure) and the fron pressure in the fron tank 2 becomes more than predetermined value. . In addition, the prone built into the auto air purge AAP is heat-compensated by exchanging heat with the supplied prone with the pipe 12 interposed therebetween. In addition, the prone tank 2 is provided with a scale for measuring the weight thereof so as to indirectly detect the prone filling weight or the like from the change in the tank weight. This scale is the load cell 14 in this embodiment, and as shown in FIG. 2, the lower member 15B by which the upper member 15A and the proton tank 2 which the lower surface extended in the substantially horizontal plane are put and fixed are shown. A load cell 14 fixed to a frame such as a frame of a bottom surface or various apparatuses with an elastic body 16 such as a spring or rubber provided on the lower surface of the upper member 15A with a mount 15 having an interposed therebetween. It is connected to the top of the box and hanged.

The prone regeneration system is a second pipe in which the prone from the liquid port 2C of the prone tank 2 returns to the gas port 2A, and the oil separation part 3A of the system oil separator 3 common to the prone recovery system. ), The filter drier 4, the compressor 5, the heat exchanger 3B of the system oil separator 3, and the like, and at the same time, a pipe opening and closing device such as a solenoid valve is provided.

This configuration will be described in detail. The pipe 17 connected to the liquid port 2C of the fron tank 2 is a vacuum switch V-SW immediately downstream of the solenoid valve SV-6 for recovery in the fron recovery system. It is connected to the connection part. The pipe 17 is provided with a filter 18 and a regenerative solenoid valve SV-4 along the prolon flow direction, respectively.

The prone filling system is configured by providing at least a pipe open / close device such as a solenoid valve at a predetermined portion of the third pipe connecting the high pressure fitting 1 and the prone tank 2.

In detail, the pipe 17 connected to the liquid port 2C of the fron tank 2 branches to the pipe 19 by branching upstream of the regeneration solenoid valve SV-4 in the fron regeneration system. The tip is connected to the pipe 6 downstream of the air protection switch C-SW in the prone recovery system.

In addition, in the piping 19, the solenoid valve SV-5 and the check valve CV-5 for charge are provided respectively from upstream and downstream.

In addition, in the apparatus shown in FIG. 1, the oil separation part 3A of the system oil separator 3, the filter drier 4, and the compressor 5 are connected to the 1st piping of a prone collection system, and the 2nd piping of a prone recovery system. Although the heat exchange part 3B of the system oil separator 3 is provided in order, you may change suitably as long as it can exhibit the function of both systems.

The prone supply system is configured by connecting a pipe 21 provided at a upstream end with a service can connection port 20 which is detachably connected to a pron supply source such as a pron can such as a downstream pipe opening / closing device in the prone regeneration system. .

In the above-described configuration, the check valve CV-S is installed in the pipe 21 connected to the service can connecting port 20, and the downstream end thereof is connected to the regeneration solenoid valve SV-4 downstream in the prone regeneration system. . In addition, when constructing a prone supply system, the regenerative solenoid valve SV-4 is turned off (valve closed).

The prone refill system is a solenoid valve at a predetermined portion of the fourth pipe connecting the prone tank 2 to the low pressure fitting 22 (low pressure side connector) which is detachably connected to the prone filling port (low pressure side) of the air conditioner. It is comprised by providing at least piping opening and closing apparatuses, such as these.

When this structure is demonstrated in detail, the piping 19 in a prone filling system branches in the upstream of the charging solenoid valve SV-5, becomes a piping 23, and the front end is connected to the low pressure fitting 22. As shown in FIG.

In addition, the piping 23 has an oil refill port 24 and a low pressure gauge 25 between the upstream and downstream, with a supplemental solenoid valve SV-8 and a check valve CV-Oi1 that opens when the predetermined pressure is applied. 2nd pressure detection apparatus) is provided, respectively.

Further, when recovering the prolon in the pipe, the air purge is performed such that the pressure and the prolon pressure in the proton tank 2 are substantially equal to pressure, and the oil separated by the system oil separator 3 is pushed to the prolon pressure. One end of a pipe 26 provided with a pressure equalizing solenoid valve SV-2 and a check valve CV-2, respectively, is connected to the solenoid valve SV-3 upstream. The other end of the pipe 26 is connected to the pipe 6 downstream of the vacuum switch V-SW in the prone recovery system.

 Further, as an option, a vacuum pump VP as a vacuum generator is provided to vacuum the inside of the pipe of the air conditioner connected to the high pressure fitting 1 and to remove the water remaining therein. That is, the piping 27 connected to the vacuum pump VP is connected to the piping 6 downstream of the high pressure gauge 7 in a fron collection system. Two solenoid valves SV-VP, a vacuum pump protection switch, and P-SW for a vacuum pump are provided in the piping 27, respectively. In addition, the piping 27 between the vacuum pump VP and the solenoid valve SV-VP for vacuum pumps branches in the middle, and the solenoid valve SV-P for vacuum opening is provided in the branch piping.

 In such a configuration, a prone filling weight setting device for setting a prone filling weight corresponding to a type of air conditioner, a pron filling weight detecting device for detecting an actual pron filling weight based on a measured weight by a load cell, and an actual The stop unit which stops prolon charging by a pron filling system when a pron filling weight of set becomes the set pron filling weight is implemented by software by the control unit which is not shown in figure.

 In addition, the control unit turns on or off the solenoid valve installed in each system based on the signal from each switch, and sequence control (1)-(13) which controls the operation | movement of each system in order as shown below. And control modes 14 and 15.

 In addition, the control unit is realized by the control unit.

 (1) Recycling Front Recovery Sequence Control (FIG. 3)

 In step 1 (denoted as "S1" in the drawing. The same applies hereinafter), whether or not the signal from the air protection switch C-SW is ON, that is, the pressure in the pipe 6 connected to the high pressure fitting 1 is within a predetermined range. It is determined whether there is. If the signal is ON, the process proceeds to step 2 (ON). If the signal is OFF, the process proceeds to step 13 (OFF). In step 13, since the tension in the pipe 6 is within a predetermined range, it is determined that there is no prone in the air conditioner on the vehicle side, or that the hose is loose or cracked. For example, the operation screen flashes red and the buzzer Is activated (hereinafter referred to as "error display"). In step 14, it is determined whether to continue the prone recovery operation. That is, it is determined whether or not an instruction to continue the work is forcibly made by the operator. If the work continues, the process proceeds to step 2 (Yes), and if the work is stopped, the process proceeds to step 12 (No).

 In step 2, based on the weight signal from the load cell 14, it is determined whether the remaining amount of the fron in the fron tank 2 is 1 kg or more. Further, if the remaining amount of prolon is 1 kg or more, the process proceeds to step 3 (Yes). In step 15, an error display is performed so as to inform that the amount of remaining prolons is small, and then the flow proceeds to step 12.

 In step 3, it is determined whether one of the " operation start " button or the " cancel " button is pressed. If the "start operation" button is pressed, the process proceeds to step 4 (start); if the "cancel" button is pressed, the process proceeds to step 12 (cancellation).

 In Step 4, the input solenoid valve SV-1 and the recovery solenoid valve SV-6 are turned on (actuated), respectively.

 In step 5, the state is maintained for a predetermined time (for example, 10 seconds).

 In step 6, the compressor 5 is turned on.

 In step 7, the state is maintained for a predetermined time (for example, 60 seconds).

 In step 8, the solenoid valve SV-3 for air purge is turned on.

 In step 9, it is determined whether or not the signal from the vacuum switch V-SW is OFF, that is, whether or not the specified pressure has been reached by the prolon recovered in the piping in the fron recovery system. If the signal is OFF, the process proceeds to step 10 (OFF), and if the signal is ON, the process proceeds to step 16 (ON). In step 16, it is determined whether the elapsed time is within the prescribed time after the " operation start " button is pressed. If the elapsed time is within the prescribed time, the process returns to Step 9 (Yes). If the elapsed time reaches the specified time, the process proceeds to Step 17 (No). In step 17, an error display is executed and the flow proceeds to step 12.

In step 10, the solenoid valve SV-3 for air purge is turned off (stopped).

In step 11, the state is maintained for a predetermined time (for example, 180 seconds).

In step 12, all the solenoid valves and the compressors 5 during operation are turned off, respectively.

According to this order control, before recovering a pron from an air conditioner, it is determined whether the pressure in the piping 6 connected to the high pressure fitting 1 is in the predetermined range. That is, even though the high pressure fitting 1 is connected to the air conditioner, if the tension in the pipe 6 is not within a predetermined range, it can be determined that the air conditioner has no prone, or the connecting hose is loose or a crack has occurred. For this reason, when such a phenomenon occurs, the recovery operation is stopped and the indication thereof is prevented, so that suction of air which is not a condensable gas can be prevented.

 In addition, by turning on the input solenoid valve SV-1, the solenoid valve SV-6 for recovery, and the compressor 5, respectively, the prone collection system shown in FIG. 4 is comprised and the prone of an air conditioner is collect | recovered by the front tank 2. At this time, since the oil is separated by the system oil separator 3 and the water is removed by the filter drier 4, the prone is recovered in an extremely removed state. Although the solenoid valve SV-3 for air purge turns ON at the stage where a prone is collect | recovered to some extent, since the auto air purge AAP is installed in the piping 13 connected to the purge port 2B of the prone tank 2, it is optimal Air purge by control becomes possible. That is, in the structure which turns ON the air purge solenoid valve SV-3 in the middle of a prolon collection | recovery, when there is little mixing of non-condensable gas, there exists a possibility that a little fron may be discharge | released to air | atmosphere. On the other hand, only the pressure-opening type auto air purge AAP may open the valve due to the temperature difference regardless of the presence or absence of non-condensable gas, so that a slight prone may be released in the air. For this reason, by installing the solenoid valve SV-3 for air purge in the piping 13 which connects the prone tank 2 and the auto air purge AAP, air purge by optimal control is attained and a prone is discharged | emitted in air | atmosphere. Can be extremely suppressed.

 (2) recital prone playback sequence control (FIG. 5)

 In step 21, it is determined whether or not the signal from the vacuum pump protection switch P-SW is OFF, that is, whether or not the pipe 27 connected to the vacuum pump VP has a constant pressure. If the signal is OFF, the process proceeds to step 22 (OFF). If the signal is ON, the process proceeds to step 31 (ON). In step 31, an error display is executed, and then the flow proceeds to step 30.

 In step 22, the solenoid valve SV-VP for vacuum pumps, the solenoid valve SV-P for vacuum openings, and the vacuum pump VP are turned on, respectively.

 In step 23, the state is maintained for a predetermined time (for example, 5 seconds).

 In step 24, the input solenoid valve SV-1 and the regeneration solenoid valve SV-4 are turned ON, respectively.

 In step 25, the state is maintained for a predetermined time (for example, 10 seconds).

 In step 26, the compressor 5 is turned on.

 In step 27, the state is maintained for a predetermined time (for example, for 180 to 240 seconds).

 In step 28, the solenoid valve SV-3 for air purge is turned on.

 In step 29, it is determined whether a predetermined time has elapsed after the vacuum pump protection switch P-SW is turned off. If the predetermined time has elapsed, the process proceeds to step 30 (Yes). If the predetermined time has not elapsed, the process waits (No).

 In step 30, all the solenoid valves and the compressors 5 which are in operation are turned off, respectively.

 According to such a sequence control, the vacuum system corresponding to a part of the fron regeneration system shown in FIG. 6 is comprised by turning ON the vacuum pump solenoid valve SV-VP, the vacuum opening solenoid valve SV-P, and the vacuum pump VP respectively. That is, by vacuuming the inside of the pipe of the air conditioner connected to the high pressure fitting 1, the water remaining in the pipe of the air conditioner after the prone recovery is removed, and the purity thereof can be suppressed from being lowered when the prolon is filled. have.

 In addition, by turning on the input solenoid valve SV-1, the regeneration solenoid valve SV-4, and the compressor 5, respectively, as shown in the figure, the fron in the fron tank 2 is a system oil separator 3 and a filter drier. Since the circuit (4) is circulated, oil, moisture, and impurities are removed, and the purity thereof is gradually increased to be regenerated.

 Since the air purge solenoid valve SV-3 is turned ON at a stage where the prone regeneration is advanced to some extent, air as non-condensable gas present in the upper portion of the prone tank 2 is discharged to the atmosphere as necessary.

 (3) recycling prone filling sequence control (FIG. 7)

 In step 41, the charging solenoid valve SV-5 is turned ON.

 In step 42, it is determined whether the prescribed charging time has elapsed since the charging solenoid valve SV-5 was turned on. At this time, as the prescribed charging time, it is preferable to set it to a time at which a normal prolon charging can be considered to be completed regardless of the type of air conditioner. In addition, if the prescribed charging time has elapsed, it is determined that the prone has not been charged for some reason, and the process proceeds to step 45 to perform error processing (Yes). Is executed. On the other hand, if the prescribed charging time has not elapsed, the process proceeds to step 43 (No).

 In step 43, on the basis of the weight signal from the load cell 14, it is determined whether or not the pron has been charged by a predetermined set weight (pron filling weight) according to the type of air conditioner. If the prolon is charged by the set weight, the process proceeds to step 44 (Yes), and if the prolon filling is not completed, the process returns to step 42 (No).

 In step 44, the charging solenoid valve SV-5 is turned OFF.

 According to such procedure control, the prone filling system shown in FIG. 8 is comprised by turning ON the charging solenoid valve SV-5. Further, the prolon in the pron tank 2 is filled from the pron filling port of the air conditioner connected to the high pressure fitting 1 using the pressure. At this time, the prone filling weight is controlled based on the change in the tank weight measured by the load cell 14.

 (4) Recycling Residual Gas Recovery Sequence Control (FIG. 9)

 In step 51, the input solenoid valve SV-1 and the equalizing solenoid valve SV-2 are turned ON, respectively.

 In step 52, the state is maintained for a predetermined time (for example, 5 seconds). Thereby, the internal tension of the front tank 2 and predetermined piping becomes substantially equal pressure.

 In step 53, the pressure equalizing solenoid valve SV-2 is turned off.

 In step 54, the compressor 5 is turned on.

 In step 55, the state is maintained for a predetermined time (for example, 55 seconds).

 In step 56, the solenoid valve SV-3 for air purge is turned ON.

 In step 57, it is determined whether the signal from the vacuum switch V-SW is turned off, that is, whether the pressure in the pipe has reached the specified tension. If the signal is OFF, the flow advances to step 58 (OFF), and if the signal is ON, it waits (ON).

 In step 58, all the solenoid valves and the compressors 5 during operation are turned off, respectively.

 According to such a sequence control, the residual gas recovery system shown in FIG. 10 is comprised by turning ON the input solenoid valve SV-1 and the compressor 5, respectively. Further, the fron remaining in the pipe is compressed by the compressor 5 and recovered to the fron tank 2 with the system oil separator 3 and the filter drier 4 interposed therebetween. In addition, by turning ON the air purge solenoid valve SV-3 in the stage where a prone collection progressed to some extent, even if air as a non-condensable gas is collect | recovered to the pron tank 2, it is discharge | released to air | atmosphere.

 (5) recycling oil discharge sequence control (FIG. 11)

 In step 61, the pressure equalizing solenoid valve SV-2 is turned ON so that the pressure in the front tank 2 can be supplied to the system oil separator 3.

In step 62, the state is maintained for a predetermined time (for example, 5 seconds).

In step 63, the pressure equalizing solenoid valve SV-2 turns off, and the oil drain solenoid valve SV-7 turns on.

In step 64, the state is maintained for a predetermined time (for example, 10 seconds).

In step 65, the oil drain solenoid valve SV-7 in operation is turned off.

According to this order control, when the pressure equalizing solenoid valve SV-2 turns ON, as shown in FIG. 12, the fron tank 2 and the system oil separator 3 will communicate, and the pressure in the fron tank 2 will be a system oil separator. It is supplied to (3).

Further, when the oil drain solenoid valve SV-7 is turned on, the oil separated here is discharged to the oil drain bolt OT by the pressure supplied to the system oil separator 3.

(6) oil fill sequence control (FIG. 13)

In step 71, it is checked whether the oil can is connected to the oil filling port 24.

If the oil can is connected, the process proceeds to step 72 (Yes). If the oil can is not connected, the process waits (No).

In step 72, the low pressure fitting 22 is connected to the front filling port (low pressure side) of the air conditioner, and it is checked whether the air conditioner is operating.

If both conditions are satisfied, the process proceeds to step 73 (Yes), and if both conditions are not satisfied, the process waits (No).

In step 73, it is checked whether the output from the low pressure gauge 25 is stable.

If the output is stable, the process proceeds to Step 74 (Yes). If the output is not stable, the process waits (No).

In step 74, the state is maintained for a predetermined time (for example, 30 seconds).

In step 75, the air conditioner is stopped during operation, and the low pressure fitting 22 and the oil can are taken out.

According to such a sequence control, when the low pressure fitting 22 is connected to the prone filling port (low pressure side) of the air conditioner, the oil can is connected to the oil filling port, and the air conditioner is operated, the air conditioner is operated according to the compressor operation. The low pressure side becomes negative pressure, and as shown in FIG. 14, oil is replenished from the oil can to the compressor. In addition, oil replenishment with respect to the pressure of an air conditioner may be made to be performed simultaneously with recycling front recovery sequence control. In this case, oil replenishment is performed using the recovery pressure for recovering the pron from the vehicle side without operating the air conditioner. For this reason, prone collection and oil replenishment can be performed in parallel and automatically, thereby reducing work time and reducing work effort.

(7) Fron diffusion order control (FIG. 15)

In step 81, the input solenoid valve SV-1 is turned ON.

In step 82, the state is maintained for a predetermined time (for example, 10 seconds).

In step 83, the compressor 5 is turned on.

In step 84, the state is maintained for a predetermined time (for example, 60 seconds).

In step 85, the solenoid valve SV-3 for air purge is turned ON.

In step 86, it is determined whether the signal from the vacuum switch V-SW is OFF. If the signal is OFF, the flow advances to step 87 (OFF); if the signal is ON, the operation waits (ON).

In step 87, it is determined whether there is an instruction to continue the prolon supply, that is, the prolon supply from the service can to the pron tank 2. If there is an instruction to continue supplying the pron, the process returns to step 81 (Yes). If no instruction to continue supplying the pron is continued, the process proceeds to step 88 (No).

In step 88, all the solenoid valves and the compressors 5 in operation are turned off, respectively.

According to such a sequence control, as shown in FIG. 16, after connecting a service can to the service can connecting port 20, and turning on the input solenoid valve SV-1 and the compressor 5, respectively, from the service can, the front tank 2 ) Is spreading. In addition, at a stage where the prone replenishment has been carried out to some extent, the solenoid valve SV-3 for air purge is turned on, and air as the non-condensable gas collected in the upper portion of the prone tank 2 is discharged into the atmosphere as necessary.

(8) Fron Replenishment Sequence Control (FIG. 17)

In step 91, the refill solenoid valve SV-8 is turned on.

In step 92, it is determined whether the prescribed refill time has elapsed since the refill solenoid valve SV-8 was turned on. At this time, it is preferable that the prescribed replenishment time is set to a time that can be considered that the refilling of the set weight (for example, 50 g) will be completed as usual. In addition, if the prescribed replenishment time has elapsed, it is determined that the prone cannot be replenished due to any cause, and the flow proceeds to step 95 to perform error processing (Yes), the replenishment solenoid valve SV-8 is turned off, and an error indication is displayed at step 96. Is executed. On the other hand, if the prescribed replenishment time has not elapsed, the process proceeds to step 93 (No).

In step 93, based on the weight signal from the load cell 14, it is determined whether or not the prone has been replenished by the set weight. Further, if the prolon is replenished by the set weight, the process proceeds to step 94 (Yes). If the prolon replenishment is not completed, the process returns to step 92 (No).

In step 94, the replenishment solenoid valve SV-8 is turned off.

According to such a procedure control, by turning ON the replenishment solenoid valve SV-8, the prone replenishment system shown in FIG. 18 is comprised. Further, when the engine of the vehicle is started, the set weight is supplemented from the prone filling port (low pressure side) of the air conditioner connected to the low pressure fitting 22 using the negative pressure of the vehicle side. At this time, the prolon refill weight is controlled based on the change in the tank weight measured by the load cell 14.

(9) Regenerative cleaning procedure control (FIG. 19)

In step 101, the input solenoid valve SV-1 and the regeneration solenoid valve SV-4 are respectively 0N.

In step 110, the state is maintained for a predetermined time (for example, 10 seconds).

In step 103, the compressor 5 is turned on.

In step 104, the state is maintained for a predetermined time (for example, 180 to 240 seconds).

In step 105, the solenoid valve SV-3 for air purge is turned on.

In step 106, the state is maintained for a predetermined time (for example, 20 minutes).

In step 107, all the solenoid valves and the compressors 5 in operation are turned off, respectively.

According to such a sequence control, the prone regeneration system shown in FIG. 20 is comprised by turning on the input solenoid valve SV-1, the regeneration solenoid valve SV-4, and the compressor 5, respectively.

Further, oil, water and impurities are removed from the fron in the fron tank 2 through the same process as the recycle fron regeneration order control, and regeneration is performed. In the stage where the prone regeneration is advanced to some extent, the solenoid valve SV-3 for air purge is turned on, and air as non-condensable gas is discharged from the prone tank 2 to the atmosphere as necessary.

(10) Regeneration residual gas recovery sequence control (FIG. 21)

In step 111, the input solenoid valve SV-1 is turned ON.

In step 112, the state is maintained for a predetermined time (for example, 5 seconds).

In step 113, the compressor 5 is turned on.

In step 114, the state is maintained for a predetermined time (for example, 60 seconds).

In step 115, the solenoid valve SV-3 for air purge is turned on.

In step 116, it is determined whether the signal from the vacuum switch V-SW is OFF.

If the signal is OFF, the process proceeds to step 117 (OFF), and if the signal is ON, the process waits (ON).

In step 117, all the actuated solenoid valves and compressors 5 are turned off, respectively.

According to this order control, like the recycle residual gas recovery order control shown in FIG. 9 and FIG. 10, the prone remaining in the piping is recovered to the fron tank 2.

(11) Vacuum Sequence Control (Repair Factory Mode)

In a repair shop, when the air conditioner is repaired, installed, or replaced, it is desirable to remove water in the pipe. That is, when the air conditioner is repaired, the atmosphere enters the pipe, and therefore, moisture in the air also enters at the same time. In addition, when the prone is filled in this state, the purity of the pron is reduced by the moisture in the pipe, and there is a possibility that the capacity of the air conditioner is lowered. As shown in Fig. 22, the solenoid valve SV-VP for vacuum pump, the solenoid valve SV-P for vacuum opening, and the vacuum pump VP are turned on, respectively, and the pron filling port of the air conditioner connected to the high pressure fitting 1 (high pressure). Air from the inside thereof is sucked from the side.

(12) Fron play sequence control (repair factory mode)

In order to remove moisture from the piping of the air conditioner, the above-described vacuum sequence control is carried out, and the prone regeneration sequence control is executed in parallel. That is, in the repair shop, it is necessary to regenerate the fron in the fron tank 2 before filling it with the air conditioner. For this reason, by the same process as control of the recycling fron regeneration sequence shown in FIG. 5, the fron regeneration system shown in FIG. 23 is comprised and it is possible to reproduce | regenerate the fron in the fron tank 2. FIG.

(13) Fron Fill Sequence Control (Repair Factory Mode)

In the prolon regeneration procedure control of the above (12), the prone charging system shown in FIG. 24 is constituted by the same process as the recycling prone charging procedure control shown in FIG. 7, and the prone is charged from the prone tank 2 to the air conditioner. do.

(14) Fron refresh control mode

Since the air conditioner prone mixes with moisture and impurities as it is used for many years, its purity gradually decreases, and its air-conditioning ability gradually decreases. For this reason, it is desirable to remove moisture etc. from a pron at an appropriate time and to restore air-conditioning ability. In order to automatically recover, regenerate, and recharge the air conditioner, the above-described recycle fron recovery sequence control, recycle fron regeneration sequence control, recycle charge sequence control, recycle residual gas recovery sequence control, and oil discharge sequence control are performed. Have a control mode that executes sequentially. In addition, as necessary, after the recycle charging sequence control, the prolon replenishment sequence control may be further executed.

15.Front Charge Control Mode (Repair Factory Mode)

After the air conditioner has been repaired at the repair shop, it is preferable to remove water from the pipe and to automatically perform the operation of filling the regenerated prone. For this reason, the control mode which performs a prone regeneration order control, a prone filling order control, and an oil discharge order control in order is provided.

According to the prone recovery, regeneration, and charging device for the air conditioner described above, when the high pressure fitting 1 and the low pressure fitting 22 are connected to the air conditioner's prone charging port to operate the operation panel, the prone is not discharged to the atmosphere. The air conditioner's fron can be automatically recovered, regenerated and charged. For this reason, work time can be shortened, an effort of an operator can be reduced, etc.

In addition, when recovering the prone from the high pressure side of the air conditioner, when the oil can is connected to the oil refill port 24 immediately below the low pressure fitting 22 connected to the low pressure side, the oil is automatically supplied to the compressor of the air conditioner. Can be supplemented with In other words, when the prone is recovered from the high pressure fitting 1, since the low pressure side of the air conditioner becomes a negative pressure, oil is replenished from the oil can to the compressor using the recovered pressure. At this time, since the check valve CV-Oi1 is opened in the oil replenishment system to open the valve only when a predetermined pressure is applied in the oil replenishment direction, when the oil can is not connected to the oil refill port 24, the low pressure fitting 22 ), And the inside of the pipe 23 is prevented from being opened to the atmosphere.

 In addition, the air collected in the upper portion of the front tank 2 is periodically discharged to the atmosphere by opening and closing the solenoid valve SV-3 for air purge. At this time, the pipe 13 connected to the purge port 2B of the front tank 2 is provided with an auto air purge AAP which opens the valve when the pressure difference between the pressure in the front tank and the reference pressure becomes more than a predetermined value. Air purge is enabled by the optimum control. In addition, since the fron built in the air purge AAP to set the reference pressure is heat exchanged between the fron supplied from the compressor 5 with the pipe 12 therebetween, temperature compensation according to the ambient temperature is achieved. For this reason, even if the ambient temperature changes, it is possible to prevent the auto air purge AAP from malfunctioning and opening the valve.

Since the air protection switch C-SW is connected directly under the high pressure fitting (1), and only when it is turned on, the air conditioner is recovered from the air conditioner, so there is no prone in the air conditioner on the vehicle side, or loose or cracked hoses. If so, pron recovery may not be performed. For this reason, mixing of air as a non-condensable gas from the vehicle side is prevented, for example, it can prevent that the pressure in the front tank 2 unnecessarily rises.

In addition, since the high pressure gauge 7 is connected directly under the high pressure fitting 1, and the low pressure gauge 25 is connected directly under the low pressure fitting 22, in the state which connected the hose before and after each operation, By operating the air conditioner, the prone tension on the high pressure side and the low pressure side can be measured. For this reason, it is possible to diagnose the air conditioner without reconnecting the hose, thereby reducing work time and reducing work effort.

 In addition, the prone filling weight corresponding to the type of air conditioner is automatically charged, so there is no need to visually check whether the filling is performed according to the regulations, and no cumbersome and manual work is required. It can be carried out. In addition, by adopting a load cell to measure the weight of the filling of the prone, high-precision filling can be achieved, and it is possible to prevent not only insufficient filling of the prolon, but also excessive filling of the pron, and it is more economical than the case of filling with a pron can. .

 At this time, as shown in FIG. 2, the mount 15 which has the upper member 15A in which the lower surface extended on the substantially horizontal surface, and the lower member 15B on which the front tank 2 is mounted is fixedly attached to the upper member 15A. The elastic body 16, such as spring and rubber, provided on the lower surface of the panel), and connected to the upper surface of the load cell 14 fixed to a frame such as a bottom surface or a frame of various devices. Therefore, the impact resistance of the load cell 14 can also be improved, ensuring the weight measurement accuracy. That is, since the elastic body 16 is provided in the lower surface of 15 A of upper members of the mount 15, even if the mount 15 inclines, the inclination is absorbed by the elastic body 16, and the rod which measures a weight The load acts almost perpendicular to the top surface of the cell 14. For this reason, although the mount 15 is inclined, the weight of the fron tank 2 can be measured with high precision. In addition, even when an impact such as vibration occurs on the mount 15, since the impact is alleviated by the elastic body 16 provided on the lower surface of the upper member 15A, the impact transmitted directly to the load cell 14 is large. Is alleviated. For this reason, the fall of the weight measurement precision of the load cell 14 by an impact is suppressed, and the effort required for maintenance inspection is reduced.

As described above, the method for recovering, regenerating, and filling the air conditioner prone according to the present invention and the oil refilling method for the air conditioner lubrication oil are automatically refilled using the recovery pressure when the prone is recovered from the air conditioner. Therefore, it is extremely useful to be able to perform oil replenishment easily and quickly even if it is not a skilled worker.

Claims (8)

At least the oil separating part of the system oil separator, the filter drier, the pressure and the heat exchange part of the system oil separator are connected to the first pipe connecting the high pressure side connector to the high pressure side connector that is detachably attached to the high pressure side of the prone filling port of the air conditioner and the fron tank. The flon collection system which installed the pipe opening and shutting device in the predetermined part at the same time as installing it, At least a second oil outlet of the system oil separator, the filter drier, the pressure and the heat exchanger of the system oil separator, which are common to the prolon recovery system, in a second pipe exiting the prolon tank and returning to the prolon tank; At the same time, the fron regeneration system which installed the pipe opening and closing device in the predetermined part, A prone filling system in which at least a pipe opening and closing device is installed at a predetermined portion of a third pipe connecting the prone tank and the high pressure side connector; Prone for air conditioners having a low pressure side connector which is detachably attached to the low pressure side of the prone filling port of the air conditioner and a prone replenishment system provided with at least a pipe opening and closing device at a predetermined portion of the fourth pipe connecting the prone tank As a recovery, regeneration and charging device for  An oil refilling device for air conditioner recovery, regeneration and charging, wherein the oil refill port is connected to the fourth pipe via a check valve that opens the valve when a predetermined pressure is applied. The first opening and closing device for periodically opening and closing the fifth pipe to the fifth pipe connected to the purge port of the fron tank, and the pressure difference between the pressure in the fron tank and the reference pressure is a predetermined value. A device for recovering, regenerating, and charging a prone for an air conditioner, wherein a second switchgear for opening a valve is provided in series when an abnormality occurs. The apparatus of claim 2, wherein the reference pressure is temperature-compensated according to the temperature of the prone to be recovered to the prone tank. The pressure detecting device for detecting whether or not the pressure in the pipe is within a predetermined range is connected to the vicinity of the high pressure side connector, and when it is detected that the pressure in the pipe is in the predetermined range by the pressure detecting device. And a control device for executing prolon recovery by the prolon recovery system. 2. The apparatus of claim 1, further comprising: connecting a first pressure detecting device for detecting a pressure in a pipe near the high pressure side connector, and connecting a second pressure detecting device for detecting a pressure in the pipe near the low pressure side connector. Prone recovery, regeneration, and charging device for air conditioners, characterized in that. The method according to claim 1, characterized in that a prone filling weight detecting device for setting a prone filling weight corresponding to a type of air conditioner and an actual prolon filling weight is detected based on an output from a scale for measuring the weight of the fron tank. A weight detecting device and a stop device for stopping the filling of the prolon by the above-mentioned pron filling system when the actual prone filling weight reaches the set prone filling weight. 7. The scale according to claim 6, wherein the scale has an elastic member provided on a lower surface of the load cell with a mount having an upper member having a lower surface extending substantially in a horizontal plane and a lower member on which a front tank is mounted. A device for recovering, regenerating, and charging a fron for an air conditioner, wherein the fron tank is weighed down to measure the weight of the fron tank. At least an oil separation part of the system oil separator, a filter drier, a compressor and a heat exchange part of the system oil separator are installed in a pipe connecting the high pressure side connector to the high pressure side of the prone filling port of the air conditioner, which is freely attached to the prone tank. At the same time, when recovering the prone from the air conditioner by a prone recovery system provided with a pipe opening and closing device at a predetermined site, the low pressure side connector and the prone tank are detachably connected to the low pressure side of the prone filling port of the air conditioner. When a predetermined pressure acts on the pipe connecting the oil refill port connected via a check valve to open the valve, the oil supplement port is refilled with the air conditioner through the low pressure side of the prolon filling port by using a pron recovery pressure. How to refill the oil for lubricating air conditioners.