KR0134911B1 - Reusing apparatus for a refrigerant - Google Patents

Abstract

The present invention relates to a recycling apparatus of a refrigerant for recovering and purifying a refrigerant, which is an operating fluid of a refrigerator, from a refrigerator, and then recharging the same into a refrigerator. In order to prevent the destruction of the environment by preventing air from leaking into the air, it is possible to recover the entire amount of refrigerant without leaking the existing refrigerant from the freezer to the outside, to purify the recovered refrigerant, and then recharge it into the freezer. Contributing to the environmental damage caused by the leakage of refrigerant, especially harmful to the environment to the outside, such as Freon can be solved.

Description

Refrigerant Refrigerant Refrigerant

1 is a configuration diagram schematically showing a recycling apparatus for a refrigerant for a refrigerator according to the present invention.

* Description of the symbols for the main parts of the drawings *

1,2,3,29: Solenoid valve 31: High pressure side connector

32: low pressure side connector 33: pressure gauge

34: oil tank 35: nitrogen tank

36: decompression tube 37: transparent plate for gas purity display

38: oil separator 38a: heater

39: waste oil collection container 40: fan

41: first condenser 42: compressor

43: oil separator for recovery 44: first filter

45: fan 46: second condenser

47: refrigerant recovery container 48: expansion valve

49: second purification filter 50: charge pump

51 heater 52 vacuum pump

53 pressure gauge 54 pressure switch

55: load cell 61, 62, 65, check valve

71, 72, 75, manual valve

The present invention relates to a device for recovering, purifying, and charging a refrigerant, which is a working fluid of a refrigerator, from a freezer. Particularly, the refrigerant of the freezer is completely recovered, purified, and recharged without leaking to the outside. The present invention relates to a refrigerating device for a refrigerant for refrigerating, which can contribute to the recycling of resources.

As is well known, general-purpose refrigerators such as a refrigerator / freezer refrigerator or an air conditioner refrigerator use a refrigerant, which is an operating fluid that transfers heat from outside to a high temperature and a low temperature. Ammonia, ethyl chloride, and the like have been commonly used, but in recent years, Frein (F) has been mainly used.

That is, the refrigerator uses a phenomenon in which a liquid that is easily vaporized is liquefied to take heat away from the surroundings when the liquid refrigerant is vaporized. In the related art, a device for recovering freon gas, which is a refrigerant when replenishing a refrigerant that is a working fluid of the refrigerator, is used. Although there was no equipment that can be purified and reused, especially in the discarded freezer, the freon gas that destroys the ozone layer should be recovered again when air is leaked. There was a problem.

Accordingly, the present invention has been invented to solve the above problems, by recovering the refrigerant used as the operating fluid of the refrigerator, and by configuring a recycling apparatus for purifying the recovered refrigerant, it is possible to It is an object of the present invention to provide a refrigerating device for a refrigerant that can contribute to the recycling of resources while preventing environmental damage.

The present invention for achieving the above object, the high-pressure side inlet and the low-pressure side inlet is respectively coupled to the high pressure side inlet and the low pressure side inlet of the refrigerator while the first solenoid valve is connected in parallel between the low pressure side The oil tank storing the operating oil for the refrigerator is connected from the connector to the fifth solenoid valve, and the first manual valve and the tenth solenoid valve are connected between the second solenoid valve and the ninth solenoid valve connected from the fifth solenoid valve. Nitrogen tanks storing nitrogen are connected to each other, and the first check valve, the eleventh solenoid valve, the pressure reducing pipe and the twelfth solenoid valve are connected in parallel to each other from the ninth solenoid valve and the refrigerant recovered through the pipeline Is connected to the gas purity transparent pipe for visual recognition of contamination status The second check valve and the fifteen solenoid valve are connected to the purity display name tube, and the fifth check valve and the oil separator 38 are branched from the fifteen solenoid valve, and the oil separator is provided with the sixteen solenoid valve. The waste oil recovery tank and the first condenser connected to each branch are connected to each other, and the compressor is connected to the first condenser, and the compressor is connected to a recovery oil separator and a 19th solenoid valve. The third check valve, the second condenser, the fourth check valve, the seventeenth solenoid valve, the twenty-second solenoid valve, the twenty-six solenoid valve, and the second manual valve are sequentially connected to the refrigerant recovery container. The third manual valve, the 23rd solenoid valve, the 20th solenoid valve, the pressure gauge, the expansion valve, the 14th solenoid valve, and the second purifying filter are sequentially connected. A charging pump, a heater and a thirteenth solenoid valve are sequentially connected immediately before the expansion valve and connected between the gas purity display transparent tube and the second check valve, A vacuum pump is branched between the eighth solenoid valve and the seventh solenoid valve, which are branched between the solenoid valve and the first manual valve and sequentially connected.

In addition, the fourth solenoid valve is connected in parallel between the second solenoid valve and the high pressure side connector for the new refrigerant injection and the low pressure side connector are provided for the case where the refrigerant of the refrigerator is a new new refrigerant instead of the freon gas. And an oil tank in which the operating oil of the new refrigerant refrigerator is stored through the sixth solenoid valve from the low pressure side connector, and is connected to a conduit connected to the second solenoid valve via a third solenoid valve to connect to the ninth solenoid. It is connected to the valve, the side of the refrigerant recovery container is provided with a new refrigerant recovery container for storing the new refrigerant from the new refrigerant recovery container is connected to the fourth manual valve and the 27th solenoid valve sequentially to the 22 solenoid valve Connected between a 25 solenoid valve and a fifth manual valve and a twenty-fourth sole from the new refrigerant recovery container. A solenoid valve is connected between the second solenoid valve and the twenty-third solenoid valve.

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

The present invention is a step of recovering the refrigerant of the freezer as a recirculation of the refrigerant inside the freezer with oil and dust, such that the remaining impurities remaining in the freezer during recovery, and the recirculation process of the refrigerant through the recirculation process and the inside of the refrigerant recycling apparatus A recovery step of sucking the refrigerant in the freezer, a purifying step of removing impurities such as oil and dust contained in the sucked refrigerant after the recovery step, and completely removing the residual impurities in the freezer together with this purification step. It is composed of a vacuum process performed simultaneously to give a cycle, and a filling process for supplying the required amount of the refrigerant purified into the freezer after the purification process and the vacuum process is completed.

The configuration of the recirculation process, the recovery process, the purification and vacuum process, and the recycling apparatus of the refrigerant for the filling process as described above, as shown in FIG. 1, the high pressure of the freezer to recover and supply the refrigerant from the freezer. The high-pressure side connector 31 and the low-pressure side connector 32, which are respectively coupled to the side inlet and the low pressure side inlet, are provided with the pressure gauge 33 connected thereto, and the first solenoid valve 1 is parallel therebetween. The oil tank 34 is connected to the oil tank 34 storing the operating oil for the refrigerator via the fifth solenoid valve 5 from the low pressure side connector 32, and the fifth solenoid valve 5 is connected to the oil tank 34. Between the solenoid valve 2 and the ninth solenoid valve 9, a nitrogen tank 35 in which nitrogen is stored is connected via a first manual valve 71 and a tenth solenoid valve 10. 9 from solenoid valve (9) When the first check valve 61 and the eleventh solenoid valve 11 are connected in parallel, respectively, the pressure reducing pipe 36 and the twelfth solenoid valve 12 are also connected in parallel, and in this manner, a transparent glass tube is formed. The gas purity display transparent tube 37 is connected to the naked eye to recognize the contamination state of the refrigerant recovered through the outside, and the second check valve 62 is connected to the gas purity display transparent tube 37. A fifteenth solenoid valve 15 is connected, and from this fifteenth solenoid valve 15, an oil separator 38 having a fifth check valve 65 and a heater 38a is branched and connected, respectively. 38, a first oil condenser 41 having a waste oil return container 39 and a fan 40 connected together with a sixteenth solenoid valve 16 is branched to each other, and to the first condenser 41 a compressor ( 42 is connected, the compressor 42 is connected to the recovery oil separator 43 and the 19th solenoid valve 19, The second condenser 46, the fourth check valve 64, and the seventeenth solenoid having the first purifying filter 44, the third check valve 63, and the fan 45 from the recovery oil separator 43. Valve 17, 22nd solenoid valve 22. The 25th solenoid valve 25 and the 2nd manual valve 72 are connected in order, and are connected to the refrigerant collection container 47, From this refrigerant collection container 47, the 3rd manual valve 73, 23rd solenoid The second purifying filter 49 is sequentially connected to the valve 23, the 20th solenoid valve 20, the pressure gauge 33, the expansion valve 48, and the 14th solenoid valve 14, and the fifth check valve. And a charge pump 50, a heater 51, and a thirteenth solenoid 13 are sequentially connected immediately before the expansion valve 48, so that the gas purity display transparent tube 37 It is connected between the 2nd check valve 62. As shown in FIG.

In addition, an eighth solenoid valve 8 and a seventh solenoid valve 7 are sequentially connected between the second solenoid valve 2 and the first manual valve 71. The eighth solenoid valve 8 ) And the seventh solenoid valve 7 are connected to the vacuum pump 32 is branched.

On the other hand, the second solenoid valve 2 has a high pressure side connector for injecting a new refrigerant in preparation for a case where a refrigerant, which is an operating fluid used in a refrigerator, is replaced with a newly developed new refrigerant instead of a conventional Freon (F) gas ( 31 ') and the low pressure side connector 32' are provided with a pressure gauge 33 'connected thereto, and a fourth solenoid valve 4 is connected in parallel therebetween, and from the low pressure side connector 32'. An oil tank (34 ') storing the operating oil of the new refrigerant refrigerator is connected to the pipeline connected to the second solenoid valve (2) via the third solenoid valve (3) via the sixth solenoid valve (6). Connected to the ninth solenoid valve (9), the new refrigerant recovery container (47 ') is also provided on the side of the refrigerant recovery container (47) in which the refrigerant of the new material is stored. 4th manual valve (74) and 27th brush from A solenoid valve 27 is sequentially connected to be connected between the twenty-second solenoid valve 22 and the twenty-fifth solenoid valve 25, and further includes a fifth manual valve 75 from the new refrigerant collection container 47 ′. And a twenty-fourth solenoid valve 24 are connected between the twentieth solenoid valve 20 and the twenty-third solenoid valve 23.

The twenty-sixth solenoid valve 26 is branched between the twenty-fifth solenoid valve 25 and the twenty-second solenoid valve 22, and is connected between the third manual valve 73 and the twenty-third solenoid valve 23. The 28th solenoid valve 28 is branched and connected, and the 29th solenoid valve 29 is branched and connected between the fifth solenoid valve 75 and the 24th solenoid valve 24, and the 26th solenoid valve The twenty-first solenoid valve 21 for air purge is connected between the 26 and the fifteenth solenoid valves 15.

In addition, an eighteenth solenoid valve 18 for air purge having a pressure gauge 53 and a pressure switch 54 is branched between the seventeenth solenoid valve 17 and the twenty-second solenoid valve 22.

The coolant recovery container 47, the new refrigerant recovery container 47 ', and the lower portion of the nitrogen tank 35 are each equipped with load cells 55 capable of measuring refrigerant, new refrigerant and liquid nitrogen stored therein. have.

On the other hand, the valves of the various types are connected to each other through the pipeline as described above, of course, the solenoid valves of these valves are the recirculation process, recovery process, vacuum and purification required for the refrigerant recycling Of course, according to the operation of the process, the filling process, according to the specifications of the refrigerator containing the refrigerant to be recycled to be controlled by the controller to be opened and closed for a predetermined time, respectively.

Hereinafter, the operation of the refrigerant recycling apparatus according to the present invention will be described in detail.

According to the present invention, a refrigerant recycling process for circulating impurities such as dust remaining in the refrigerator with the refrigerant is carried out before the refrigerant is transferred from the refrigerator, and when the recycling process is completed, a refrigerant recovery step for recovering the refrigerant from the refrigerator is carried out. This is followed by the vacuum process of the freezer to remove residues that may remain in the freezer and the purification of the coolant so as to reuse the recovered refrigerant, while all of these processes are completed. The refrigerant filling step is performed to inject the refrigerant, which is stored together, into the freezer as necessary at the same time. The recycling of the refrigerant, which recycles impurities such as oil and dust remaining together with the coolant in the freezer, is performed first. Recycling the solvent of the present invention into the high pressure side inlet and the low pressure side inlet of the refrigerator The high pressure side connector 31 and the low pressure side connector 32 are respectively connected to each other, and the first solenoid valve 1 is opened while the second solenoid valve 2 is closed to operate the refrigerator. In some cases, when the oil in the freezer is insufficient, the fifth solenoid valve 5 is temporarily opened to replenish the oil stored in the oil tank 34 in the freezer and then operate the freezer. The supplemented oil remains in the freezer. It is circulated in the freezer in the state of mixing with the refrigerant, oil and other impurities, and serves to reduce the amount of impurities remaining in the freezer during recovery of the refrigerant.

Next, a recovery step of recovering the refrigerant from the freezer to the refrigerant recycling apparatus of the present invention is performed. The recovery step includes the second solenoid valve 2, the ninth solenoid valve 9, the eleventh solenoid valve 11, When the fifteenth solenoid valve 15 is opened, the oil separator 38, the first condenser 41, and the compressor 42 are operated so that the cold mixture, oil, and other impurities in the refrigerator are mixed into the low pressure side connector 32. The first solenoid valve 12 is closed for the first few minutes during the recovery process so that the compressor 42 is not overwhelmed by the incoming solution. The pressure reducing pipe 36 is gradually introduced, and afterwards, the twelfth solenoid valve 12 is opened to free the flow of the mixed solution, and the gas purity display transparent tube 37 and the second check valve are provided. 62 and 15th brush The mixed solution passed through the nose valve 15 is heated in the oil separator 38, and the refrigerant having a low freezing point (containing dust or impurities) in the mixed solution evaporates and flows into the first condenser 41 in a gaseous state. In this case, the gaseous refrigerant introduced is cooled by the fan 40 of the first condenser 41 so as not to impede the compressor 42 when it is introduced into the compressor 42 in a later step, The oil separated from the refrigerant in the oil separator 38 is collected into the waste oil recovery container 39 by the periodic opening of the sixteenth solenoid valve 16. The refrigerant introduced into the compressor 42 passes through the recovery oil separator 43 and once again separates the oil contained in the refrigerant, passes through the first purifying filter 44, and filters the dust contained in the refrigerant, thereby increasing the humidity. It is lowered and introduced into the second condenser 46 through the third check valve 63. At this time, the residual oil filtered by the recovery oil separator 43 is opened by opening the nineteenth solenoid valve 19. Is reintroduced into In addition, the refrigerant introduced into the second condenser 46 is once again re-cooled and liquefied by the fan 45 provided in the second condenser 46, so that the fourth check valve 64 and the seventeenth solenoid valve 17, After the 22nd solenoid valve 22 and the 25th solenoid valve 25 pass through the 2nd manual valve 72 opened, it flows into the refrigerant recovery container 47, and the refrigerant | coolant recovery process is completed.

When the recovery process of the refrigerant is completed, the purifying process of the refrigerant and the vacuum process of purifying the inside of the freezer are performed at the same time. First, the purifying process is performed in the state where the refrigerant recovery container (15) is closed with the fifteenth solenoid valve 15 closed. As the third manual valve 73 of 47 is opened and closed, refrigerant stored therein is also driven by the compressor 42 to the expansion valve 48 via the twenty-third solenoid valve 23 and the twentieth solenoid valve 20. The introduced liquid refrigerant is evaporated by the expansion valve 48 and passed through the fourteen solenoid valve 14 to the second purifying filter 49 to purify once again, and then the fifth check valve 65. After passing through the oil separator 38 through the same repetitive process as the recovery process, the refrigerant is once again stored in the refrigerant recovery vessel 47 in the purified state once again is completed.

On the other hand, the vacuum process performed at the refrigerator side at the same time as the above purification process, the first manual valve 71, the third solenoid valve (3), the fifth solenoid valve (5), the ninth solenoid valve (9) is closed On the other hand, when the second solenoid valve 2 and the eighth solenoid valve 8 are opened and the vacuum pump 52 is driven, the remaining refrigerant in the refrigerator and other residual substances from the low pressure side connector 32 are discharged. The collection is completed in the conduit between the eighth solenoid valve 8 and the vacuum pump 52 via a conduit, and then the eighth solenoid valve 8 is closed to open the seventh solenoid valve 7. Completed refrigerant and other residues are purged to the outside, and this vacuum process is additionally charged with nitrogen depending on the surrounding environment, i.e., when the humidity is high when the refrigerant is recharged. Nitrogen Is opened and closed the tenth solenoid valve 10 and the first manual valve 71 connected to the storage liquid nitrogen storage tank 35 to supply nitrogen to the inside of the freezer through the second solenoid valve 2 opened in the previous step of the vacuum process. After injection, the same process as above is carried out by a vacuum process, wherein the nitrogen introduced into the freezer contributes to lowering the humidity of free materials in the freezer.

Finally, when the vacuum process and the purification process are completed, a filling process for re-injecting the purified refrigerant into the freezer is performed, and this filling process is branched between the twentieth solenoid valve 20 and the expansion valve 48. Of the thirteenth solenoid valve 13, the gas purity display transparent tube 37, and the twelfth solenoid in a state in which the refrigerant purified by the driving of the connected charge pump 50 is evaporated through the heater 51. It flows into the freezer through the low pressure side connector 32 through the ninth solenoid valve 9 and the second solenoid valve 2 which are continuously opened while being introduced into the first check valve 61 through the valve 12. Is complete.

Meanwhile, between the twenty-six solenoid valve 26 and the third manual valve 73 and the twenty-third solenoid valve 23, which are branched between the twenty-fifth solenoid valve 25 and the twenty-second solenoid valve 22, The twenty-eighth solenoid valve 28 branched and the twenty-sixth solenoid valve 29 branched between the fifth manual valve 75 and the twenty-fourth solenoid valve 24 are the twenty-six solenoid valves 26. And the 21st solenoid valve 21 for air purge between the and 15th solenoid valve 15 are selectively opened to purge the air contained in the conduit if necessary, and likewise the 17th solenoid valve 17 18) solenoid valve 18 for air purge, which is branched with a pressure gauge 53 and a pressure switch 54 between the twenty-second solenoid valve 22 and the twenty-second solenoid valve 22, has a pressure measured in the pressure gauge 53. Pressure is constant The pressure switch 54 is operated only when the level is higher than the level, so that the air inside the pipeline can be discharged to the outside.

In addition, when the refrigerating device for the refrigerator is applied to a new refrigerator replaced with a new refrigerant instead of a Freon (hereinafter referred to as an old refrigerant), the same operation as described above is performed. In the same way as the refrigerant recycling process, the high pressure side inlet 31 'and the low pressure side inlet 32' are respectively connected to the high pressure side inlet and the low pressure side inlet of the new refrigerator, and the fourth solenoid valve 4 While opening, the third solenoid valve 3 operates the refrigerator in a closed state so that the new refrigerant is circulated in the internal part of the refrigerator. When the oil in the refrigerator is insufficient, the sixth solenoid valve 6 is temporarily opened. This is done by replenishing the oil suitable for the new freezer stored in the oil tank 34 'and then operating the freezer.

Then, the recovery step of recovering the refrigerant from the freezer to the recycling apparatus, unlike the recovery process of the old refrigerant, the second solenoid valve (2) is closed and the subsequent step in the state where the third solenoid valve (3) is open instead However, unlike the case of the old refrigerant, the 27th solenoid valve 27 and the fourth which are opened via the 22nd solenoid valve 22 by the 25th solenoid valve 25 closed with the new refrigerant being recovered are closed. Passed through the manual valve 74 and introduced into the new refrigerant recovery container 47 '.

When the recovery process of the new refrigerant is completed, the purification process of the new refrigerant and the vacuum process of purifying the inside of the freezer are performed at the same time. First, the purification process is closed in the fifteenth solenoid valve 15 as in the case of the old refrigerant. The new refrigerant stored therein as the fifth manual valve 75 of the new refrigerant collection container 47 'is opened and closed, and the new refrigerant is also stored through the 24th solenoid valve 24 by the driving of the compressor 42. 20 is introduced into the solenoid valve 20, the fifth check valve 65, the oil separator 38 is passed through the same process as in the recovery process of the new refrigerant, the new refrigerant is once again purified state The 25th closed sequentially passing through the first condenser 41, the compressor 42, the first purifying filter 44, the second condenser 46, the 17th solenoid valve 17, the 22nd solenoid valve 22 Guided to the 27th solenoid valve 27 by the solenoid valve 25 4 is made via the manual valve 74 is stored in the new refrigerant recovery vessel (47 ').

On the other hand, the vacuum process performed at the side of the refrigerator at the same time as the above purification process is a state in which the fourth manual valve 74, the second solenoid valve 2, the sixth solenoid valve 6, and the ninth solenoid valve 9 are closed. On the other hand, when the eighth solenoid valve 8 is opened and the vacuum pump 52 is driven, the new solenoid valve remaining in the refrigerator from the low pressure side connector 32 'and the other remaining substances are passed through the conduit. It is collected in the conduit between (9) and the vacuum pump 52, and the subsequent process is the same as the vacuum process of the old refrigerant, and also in the case of high humidity conditions when refilling the new refrigerant of the freezer is also the same as the case of the old refrigerant In addition, nitrogen filling is performed in parallel.

Finally, when the vacuum process and the purification process are completed, a filling process for re-injecting the purified new refrigerant into the freezer is performed, and this filling process is similar to the filling of the old refrigerant, that is, the 20th solenoid valve The thirteenth solenoid valve 13 of the new refrigerant purified by the driving of the charging pump 50 branched between the expansion valve 48 and the expansion valve 48 is opened in a vaporized state through the heater 51; The refrigerator is cooled through the low pressure side connector 32 'via the ninth solenoid valve 9 and the third solenoid valve 3 which are continuously opened while being introduced into the first check valve 61 through the twelfth solenoid valve 12. It is made by entering into wealth.

As described above, according to the refrigerant recycling apparatus of the present invention, the refrigerant is leaked to the outside from the refrigerator in order to replenish the refrigerant, which is a working fluid of the refrigerator, or to prevent environmental damage by preventing leakage of the stored refrigerant in the air during disposal of the refrigerator. By retrieving the entire amount of water, and purifying the recovered refrigerant and then recharging it into the freezer, it is possible to contribute to the recycling of resources and to cause the leakage of refrigerant harmful to the environment, especially Freon. It will be effective to solve the problem of environmental destruction.

In addition, when the refrigerant used as the working fluid of the refrigerator is replaced with a new material instead of freon gas, the above-mentioned refrigerant recycling device can be utilized in parallel with the freon gas currently in use, so there is no need to provide a new device. do.

Claims (4)

While the high pressure side inlet 31 and the low pressure side inlet 32 which are respectively coupled to the high pressure side inlet and the low pressure side inlet of the refrigerator are provided, a first solenoid valve 1 is connected in parallel between the low pressure side inlet 32 The oil tank 34 storing the operating oil for the refrigerator is connected to the fifth solenoid valve 5 from the second solenoid valve 5 and the second solenoid valve 2 and the ninth solenoid valve connected from the fifth solenoid valve 5. A nitrogen tank 35 in which nitrogen is stored is connected between the first manual valve 71 and the tenth solenoid valve 10, and the first check valve 61 is connected from the ninth solenoid valve 9. And the eleventh solenoid valve 11, the pressure reducing pipe 36 and the twelfth solenoid valve 12 are connected in parallel to each other in parallel, so that the contamination state of the refrigerant recovered through the conduit can be visually recognized from the outside. The gas purity display transparent tube 37 is connected, and this gas The second check valve 62 and the fifteenth solenoid valve 15 are connected to the purity display transparent plate 37, and the fifth check valve 65 and the oil separator 38 are connected to the fifteenth solenoid valve 15. Each branch is connected to each other, and the oil separator 38 is connected to the waste oil return container 39 and the first condenser 41 which are connected with the sixteenth solenoid valve 16, respectively, and the first condenser 41 is connected. The compressor 42 is connected to the compressor 42 and the recovery oil separator 43 and the nineteenth solenoid valve 19 are connected to the compressor 42, and the first purification filter 44 is discharged from the recovery oil separator 43. , The third check valve 63, the second condenser 46, the fourth check valve 64, the 17th solenoid valve 17, the 22nd solenoid valve 22, the 25th solenoid valve 25, the second The manual valve 72 is sequentially connected to the refrigerant recovery container 47, and from the refrigerant recovery container 47, the third manual valve 73, the twenty-third solenoid valve 23, and the twentieth solenoid valve ( 20, the pressure gauge 33, the expansion valve 48, the 14th solenoid valve 14, the second purifying filter 49 is sequentially connected to the fifth check valve 65, the expansion valve ( Just before 48, the charging pump 50, the heater 51, and the thirteenth solenoid valve 13 are sequentially connected between the gas purity display transparent tube 37 and the second check valve 62. Refrigerant recycling device consisting of. The vacuum pump vacuum pump according to claim 1, wherein the eighth solenoid valve 8 and the seventh solenoid valve 7, which are branched between the second solenoid valve 2 and the first manual valve 71, are sequentially connected to each other. Refrigerant recycling apparatus, characterized in that 52 is branched connected. The high pressure side connector (31 ') and the low pressure side connector (32') for injection of a new refrigerant for the case where the refrigerant of the refrigerator is a new refrigerant instead of Freon gas is provided on the side of the second solenoid valve (2). ') Is provided with a fourth solenoid valve (4) connected in parallel between them, the oil tank in which the operating oil of the refrigerant for a new refrigerant is stored through the sixth solenoid valve (6) from the low-pressure side connector (32') 34 'is connected to the conduit connected to the second solenoid valve 2 via the third solenoid valve 3, and is connected to the ninth solenoid valve 9, and the refrigerant recovery container 47 A new refrigerant recovery container 47 'is provided at a side of the new refrigerant recovery container 47' so that the fourth manual valve 74 and the 27th solenoid valve 27 are sequentially connected from the new refrigerant recovery container 47 '. Between solenoid valve 22 and the 25th solenoid valve 25 In addition, the fifth manual valve 75 and the 24th solenoid valve 24 is connected between the 20th solenoid valve 20 and the 23rd solenoid valve 23 from the new refrigerant collection container 47 '. Refrigerant recycling apparatus for refrigeration. The twenty-sixth solenoid valve (26) is branched and connected between the twenty-fifth solenoid valve (25) and the twenty-second solenoid valve (22), and the third manual valve (73) and the twenty-third solenoid valve (20). The 28th solenoid valve 28 is branched and connected between the 23, the 29th solenoid valve 29 is branched and connected between the fifth manual valve 75 and the 24th solenoid valve 24, The twenty-first solenoid valve 21 for air purge is connected between the twenty-six solenoid valve 26 and the fifteen solenoid valve 15, while the twenty-six solenoid valve 17 and the twenty-second solenoid valve 22 are connected to each other. An eighteen solenoid valve (18) for purging air having a pressure gauge (53) and a pressure switch (54) is branched and connected.