KR20040047668A - Refrigerant recycling method from air-conditioner - Google Patents

Abstract

PURPOSE: A method for recovering a refrigerant from an air conditioner is provided to efficiently recover a refrigerant without using power, thereby reducing a burden of a worker. CONSTITUTION: An air conditioner has a two-way valve(6) and a three-way valve(7) in an outdoor unit(4) as a connecting port. Both the two-way valve and the three-way valve are in a closed state. A refrigerant recovering pump(9) is connected to a service port of the three-way valve. The refrigerant recovering pump is connected with a refrigerant recovering container(15). The refrigerant recovering pump generates a suction-exhaust action effect by operating a check valve for suction(95) and a check valve for exhaust(96) by driving a piston(92) inside a cylinder container(91), thereby recovering the refrigerant remaining inside an indoor unit and connecting pipes(2,3) into the refrigerant recovering container.

Description

Refrigerant recovery method from air conditioner {REFRIGERANT RECYCLING METHOD FROM AIR-CONDITIONER}

The present invention relates to a refrigerant recovery method or an air conditioner which is performed when the air conditioner is separated in a situation in which an air conditioner installed in a house or a building application cannot pump down a refrigerant. The present invention relates to a method for recovering refrigerant in the field in order to repair a failure of a refrigeration cycle component of an outdoor unit of a machine.

Conventionally, industrial wastes consisting of iron, aluminum, copper, plastics, and the like and their composite materials are crushed using a crusher or the like, and then recycled by separating and sorting.

In addition, since wastes, such as an air conditioner, contain refrigerant and oil inside, they pump down at the site, collect the refrigerant in the refrigeration cycle system in the outdoor unit body, and take it to a factory with sufficient equipment. Dismantled. If the crusher is fed into the crusher in such a state as well, the refrigerant gas is ejected and the oil leaks, and environmental damage and risk are high. Therefore, the recovery of the refrigerant gas and oil is obliged. For this purpose, it is common to use a refrigerant recovery device which forcibly sucks by using an electric compressor as the power of the refrigerant recovery.

However, in the market, various air conditioners exist, the compressors of the installed air conditioners are broken and cannot be operated completely, or the air conditioners may be separated after the supply power is already stopped. Even in this case, there has been a demand for the development of a technology capable of recovering sufficient refrigerant without using a power source. In addition, since only a refrigerant recovery device using an electric compressor is used to recover the refrigerant in order to repair a failure of a refrigeration cycle component of an outdoor unit on the market, the refrigerant recovery device is generally large, heavy, and expensive. It was the fact that it did not spread and was inevitably releasing to the atmosphere.

In an air conditioner configured by connecting an indoor unit and an outdoor unit by connecting pipes, the outdoor unit is provided with a two-way valve and a three-way valve. Refrigerant recovery method comprising the steps of closing both the two-way valve and three-way valve, connecting the refrigerant recovery pump to the service port of the three-way valve, and connecting the refrigerant recovery pump and the refrigerant recovery container Steps. As the piston for driving the refrigerant recovery pump operates inside the cylinder vessel, the intake check valve and the exhaust check valve are operated to generate an intake and exhaust effect, and the refrigerant remaining in the indoor unit and the connection pipe to the refrigerant recovery vessel. Provided is a method for recovering refrigerant from an air conditioner, wherein the refrigerant is recovered.

1 is a main configuration diagram of an air conditioner showing an embodiment of the present invention.

2 is a main configuration diagram and a connection relation diagram relating to an apparatus of a refrigerant recovery method used in Embodiment 1 of the present invention.

3 is a cross-sectional configuration diagram of an intake check valve used in Embodiment 1 of the present invention.

4 is a cross-sectional configuration diagram of an oil separator used in Embodiment 1 of the present invention.

Fig. 5 is a main configuration diagram and a connection relation diagram relating to the apparatus of the refrigerant recovery method used in the second embodiment of the present invention.

6 is a main configuration diagram and a connection relationship diagram of an apparatus of a refrigerant recovery method used in Embodiment 3 of the present invention.

7 is a main configuration diagram and a connection relation diagram of an apparatus of a refrigerant recovery method used in Embodiment 4 of the present invention.

8 is a main configuration diagram and a connection relation diagram relating to an apparatus of a refrigerant recovery method used in Embodiment 5 of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: indoor unit 2, 3: connection piping

4: outdoor unit 6: 2-way valve

7: 3-way valve 9: Refrigerant recovery pump

91: cylinder container 92: piston

93: drive shaft 95: intake check valve

96 exhaust check valve 10 pressure resistant hose

11: needle valve 12: oil separator

13: low pressure gauge 15: refrigerant recovery container

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail with reference to drawings.

(Embodiment 1)

Figure 1 shows the main configuration of the air conditioner.

In Embodiment 1, it is assumed that a pump-down operation cannot be performed due to a failure of a compressor (not shown) mounted in an outdoor unit in an air conditioner using one indoor unit and refrigerant R22 having a refrigerant charge of 750 g for one outdoor unit. do. An air conditioner is a main part, and consists of the indoor unit 1, the connection pipes 2 and 3, and the outdoor unit 4, and the connection pipes 2 and 3 are covered with the piping cover 5. As shown in FIG. In detail, the auxiliary piping (not shown) and connection piping 2 and 3 which were drawn out from the indoor unit 1 spread and connect in a funnel shape.

Fig. 2 shows the main configuration diagram and connection relationship of the apparatus of the refrigerant recovery method. The outdoor unit 4 is provided with a two-way valve 6 and a three-way valve 7, and is connected to the indoor unit 1 through connection pipes 2 and 3. By connecting the connection valve 8 side to the service port of the three-way valve 7 of the outdoor unit 4, the intake check valve 95 side of the refrigerant recovery pump 9 is connected to the internal pressure hose 10 through the internal pressure hose 10. Connected. The needle valve 11, the oil separator 12, and the low pressure gauge 13 are provided in the path image of the pressure resistant hose 10. In addition, the exhaust check valve 96 side of the refrigerant recovery pump 9 is connected to the refrigerant recovery container 15 through an internal pressure hose 14. A refrigerant recovery vessel (15) is a stainless steel vessel of a design pressure 30kg / cm ^2, internal volume 500cm ^3, the coolant inlet port has a valve 151 is provided. In the first embodiment, the refrigerant charge amount is 750 g, and it is necessary to recover the refrigerant remaining in the indoor unit 1 and the connection pipes 2 and 3 with respect to it, and in this case, the refrigerant recovery amount is generally over 200 g. Since there was no refrigerant, a container 15 for recovering refrigerant having an internal volume of 500 cm ³ was used. The refrigerant recovery container 15 is in a negative pressure state of 50 torr or less by using the refrigerant recovery pump 9 in advance to set the valve 151 in a closed state.

The refrigerant recovery pump 9 is divided into two chambers in which a piston 92 is disposed inside the cylinder vessel 91, and a driving shaft 93 is connected to the piston 92, and the driving shaft 93 is a cylinder vessel 91. The intake check valve 95 and the exhaust check valve 96 at the bottom dead center position of the piston 92 on the one chamber side where the drive shaft 93 is not provided. It is installed. The piston 92 is provided with an O-ring 97 made of CR (Chloroprene rubber) to prevent leakage of refrigerant gas from the outer peripheral portion of the piston 92.

3 is a sectional configuration diagram of the intake check valve 95. In the intake check valve 95, the copper pipe 951 is roll grooved at two places, and the brass valve accommodating seat 952 is fixed to the groove processing portion 951a. The compression coil spring body 953 is joined to the PPS resin plate 954, and the PPS resin plate 954 strikes the brass valve accommodation sheet 955 by the compression coil spring force, and the brass valve accommodation sheet The sieve 955 and the resin plate 954 block the flow path by surface contact, and have a check valve structure in which the refrigerant gas flows only in the direction of the arrow. As the compression coil spring 995, a spring constant made of SUS304 was 0.4 N / mm. The brass valve accommodating seat 955 is fixed by the groove processing part 951b, and a taper part is provided in the upstream flow path of the brass valve accommodating seat 955. Since the exhaust check valve 96 has the same structure as that of the intake check valve 95, description thereof is omitted, but a spring constant of 0.6 N / mm is used.

The oil separator 12 used in Embodiment 1 is demonstrated. The cross-sectional block diagram of an oil separator is shown in FIG. The oil separator 12 is provided with a cylindrical inner ring 122 inside a cylindrical stainless steel container 121, and a 32 mesh stainless steel mesh is used as the inner ring 122, and a 32 mesh of the same shape in a disc shape. Stainless steel nets (123, 124, 125) are installed at intervals of three stages. The refrigerant gas enters the inlet 126 and exits the outlet 127. As a result, the oil for the compressor accompanying the refrigerant gas collides with the stainless steel net so that only the oil is separated.

Next, an operation procedure of the refrigerant recovery will be described.

First, the refrigerant recovery container 15 with the valve 151 closed and the refrigerant recovery pump 9 are connected to each other, and the internal pressure hose 10 is also connected to the refrigerant recovery pump 9. Next, the two-way valve 6 and the three-way valve 7 of the outdoor unit 4 are closed by the rotation of the hexagon wrench. Thereafter, the needle valve 11 is closed in the service port portion of the three-way valve 7 and connected to the connecting valve 8. At this time, the connection valve 8 uses a form in which the valve core protrusion provided in the three-way valve 7 can be pressed inward while being fastened. As a result, the pressure resistant hose 10 is in communication with the inside of the connecting pipe, and the refrigerant gas reaches the needle valve 11 and stops. Next, the refrigerant remaining in the indoor unit 1 and the connection pipes 2 and 3 by slightly opening the needle valve 11 in the closed state is the intake check valve 95 of the refrigerant recovery pump 9. From the exhaust check valve 96 to the inlet valve 151 of the refrigerant recovery container 15 through the pressure-resistant hose 14. Thereafter, the valve 151 of the refrigerant recovery container 15 is opened. This also causes the refrigerant gas to move into the refrigerant recovery vessel 15. By slowly opening the needle valve 11, the refrigerant remaining in the indoor unit 1 and inside the connection pipes 2 and 3 is led to the refrigerant recovery container 15. At this time, the compressor oil remaining in the indoor unit 1 and the connection pipes 2 and 3 gradually opens the needle valve 11, and the refrigerant gas and oil are separated from the oil separator 12 arranged in the middle. Oil can be prevented from entering the coolant recovery pump 9 side. In addition, when the refrigerant gas moves toward the refrigerant recovery pump 9 side at once, the handle 94 is driven in the direction of the head, so that the handle 94 is disposed at the top dead center position of the piston 92 in advance and the needle valve 11 is moved. It is preferable to open the. After the needle valve 11 is completely opened, it waits for a while until the movement of the refrigerant gas stops while listening to the refrigerant gas sound. Then, when the inside of the refrigerant recovery container 15 and the inside of the indoor unit and the connection pipe become equal pressure, the movement of the refrigerant gas stops, so that the handle 94 of the refrigerant recovery pump 9 is removed in consideration of the opportunity. By driving in the direction, the refrigerant gas in the cylinder vessel 91 is discharged from the exhaust check valve 96 to lead the refrigerant gas to the refrigerant recovery container 15. In addition, by driving the handle 94 in the head direction, the refrigerant gas remaining in the indoor unit and the connection pipe is taken into the cylinder container 91. By repeating these handle reciprocating operations, the refrigerant gas remaining in the indoor unit 1 and the connection pipes 2 and 3 finally is forcibly recovered by the refrigerant recovery container 15. In addition, the amount of refrigerant gas remaining can be grasped by reading the pressure state with the low pressure gauge 13. Since the refrigerant gas pressure at 20 ° C. of the refrigerant R22 is 9.28 kgf / cm ² , if the refrigerant recovery pump has a boosting capacity of 10 kgf / cm ² , the refrigerant is liquefied into the refrigerant recovery container 15 to provide sufficient refrigerant recovery. I can do it. If the worker is working directly using the handle 94, the hydraulic pressure area of the piston 92 is preferably 4 cm ² or less because the load on the handle 94 is quite large. When the low pressure gauge 13 reaches a negative pressure at a constant pressure, the valve 151 of the refrigerant recovery container 15 is closed, and the connecting valve 8 is removed from the service port portion of the three-way valve 7. Refrigerant recovery is completed.

(Embodiment 2)

In Embodiment 2, the case where the power supply from an electric power company is stopped in the air conditioner using the refrigerant | coolant R407C of refrigerant | charge amount 800g with one indoor unit with respect to one outdoor unit is demonstrated. FIG. 5 shows a main configuration diagram and a connection relationship of the apparatus of the refrigerant recovery method according to the second embodiment. The outdoor unit 16 is provided with a two-way valve 17 and a three-way valve 18, and is connected to an indoor unit (not shown) through connection pipes 19 and 20. By connecting the connection valve 21 side to the service port of the three-way valve 18 of the outdoor unit 16, the intake check valve 225 side of the refrigerant recovery pump 22 is connected to the internal pressure hose 23. Connected. The needle valve 24, the oil separator 25, and the low pressure gauge 26 are provided in the path image of the pressure resistant hose 23. In addition, the exhaust check valve 226 side of the refrigerant recovery pump 22 is connected to the refrigerant recovery container 28 through an internal pressure hose 27. A refrigerant recovery vessel (28) is a stainless steel vessel of a design pressure 30kg / cm ^2, internal volume 700cm ^3, the coolant inlet port has a valve 281 is provided. In addition, the synthetic zeolite 282 is filled in the refrigerant recovery container 28, and the position is fixed by the baffle 283. The synthetic zeolite used was 13X type, 1/12 inch diameter particles, 600 g. The refrigerant | coolant collection container 28 is made into the negative pressure state of 50 torr or less using the refrigerant | coolant recovery pump 22 previously, and has set the valve 281 to the closed state. The oil separator 25 used the same structure as that of the first embodiment.

The refrigerant recovery pump 22 is divided into two chambers in which a piston 222 is disposed inside the cylinder container 221, and a driving shaft 223 is connected to the piston 222, and the driving shaft 223 is a cylinder container 221. The intake check valve 225 is provided at the top dead center position of the piston 222 on the one chamber side through which the drive shaft 223 is installed. Moreover, the exhaust check valve 226 is provided in the bottom dead center position of the piston 222 of the other thread side in which the drive shaft 223 is not provided. Moreover, the check valve 227 is provided also in the piston 222, and it is the structure which prevents the refrigerant gas flow to the one chamber side in which the drive shaft 223 is provided from the other chamber side in which the drive shaft 223 is not provided. In addition, an O-ring 228 made of hydrogenated acrylonitrile-butadiene rubber (HNBR) is provided at the outer peripheral portion of the piston 222, and is designed to prevent refrigerant gas leakage from the outer peripheral portion of the piston 222. Further, an O-ring (not shown) made of HNBR is also provided in the through hole where the drive shaft 223 is in contact with the cylinder container 221, and is designed to prevent leakage of refrigerant gas from the drive shaft 223. In addition, since the intake check valve 225, the exhaust check valve 226, and the check valve 227 have substantially the same structure as those described in the first embodiment, description thereof is omitted.

Next, an operation procedure of the refrigerant recovery will be described.

First, the refrigerant recovery container 28 with the valve 281 closed and the refrigerant recovery pump 22 are connected to each other, and the internal pressure hose 23 is also connected to the refrigerant recovery pump 22. Next, the two-way valve 17 and the three-way valve 18 of the main body of the outdoor unit 16 are closed by the rotation of the hexagon wrench. Thereafter, the needle valve 24 is connected to the connection valve 21 in the service port portion of the three-way valve 18 in a closed state. At this time, the connection valve 21 uses a form that can press the valve core protrusion provided in the three-way valve 18 and press inward. As a result, the pressure resistant hose 23 is in communication with the inside of the connecting pipe, and the refrigerant gas reaches the needle valve 24 and stops. Next, by slightly opening the needle valve 24 in the closed state, the refrigerant gas remaining in the indoor unit 1 and the connection pipes 19 and 20 is discharged to the intake check valve of the refrigerant recovery pump 22 ( 225 enters the inlet side of the cylinder container 221, passes through the check valve 227 provided in the piston 222, moves to the side of the cylinder container 221, and furthermore, the exhaust pressure check valve 226 from the exhaust check valve 226. It passes by 27 to the inlet valve 281 of the refrigerant | coolant collection container 28 at once. Thereafter, the valve 281 of the refrigerant recovery container 28 is left open. Thereby, the refrigerant gas also moves into the refrigerant recovery container 28 and is physically adsorbed by the synthetic zeolite 282 filled therein. By slowly opening the needle valve 24, the refrigerant gas remaining inside the indoor unit 1 and inside the connection pipes 19 and 20 is led to the refrigerant recovery container 28. At this time, the compressor oil remaining in the indoor unit and the connecting pipe is gradually opened by the needle valve 24, and the refrigerant gas and oil are separated by the oil separator 25 disposed in the middle, and the refrigerant recovery pump 22 is moved to the refrigerant recovery side. Oil can be prevented from invading. In addition, when the refrigerant gas moves to the refrigerant recovery pump 22 side at once, the handle 224 moves downward when the flow resistance of the check valve 227 is large. If the flow resistance of the check valve 227 is small, the one chamber and the one chamber will be uniformly pressured soon. Therefore, when using the refrigerant | coolant collection | recovery pump 22 like Embodiment 2, it is thought that there is little concern about an operator's injury. Finally, after the needle valve 24 is completely opened, it waits for a while until the inside of the refrigerant | coolant collection | recovery container 28, the indoor unit 1, and the inside of connection piping 19 and 20 become a uniform pressure. After that, the opportunity to stop the movement of the refrigerant gas is driven in the direction of the handle 224 of the refrigerant recovery pump 22. The refrigerant gas inside the cylinder vessel 221 is discharged from the exhaust check valve 226. At the same time as the discharge, the refrigerant gas remaining inside the indoor unit 1 and inside the connection pipes 19 and 20 is taken in from the intake check valve 225. The discharged refrigerant gas is recovered into the refrigerant recovery container 28. By moving the handle part 224 of the refrigerant recovery pump 22 in the head direction, the refrigerant gas in the cylinder container 221 is transferred from the one chamber to the one chamber through the check valve 227 installed in the piston 222. Move. Also, by moving the handle part 224 in the direction, the refrigerant gas is compressed and recovered into the refrigerant recovery container 28 through the exhaust check valve 226. By repeating the handle reciprocating operation, the refrigerant gas remaining in the indoor unit 1 and the connection pipes 19 and 20 is forcibly recovered by the refrigerant recovery container 28. In addition, the amount of refrigerant gas remaining can be grasped by reading the pressure state using the low pressure gauge 26. Since the refrigerant gas pressure is at most 10.56 kgf / cm ² at 20 ° C of the refrigerant R407C, if the pump for refrigerant recovery has a boosting capacity of 15 kgf / cm ² , sufficient refrigerant recovery can be performed. However, the refrigerant recovery pump 22 having the same configuration as that in the second embodiment also has a sufficient level because the refrigerant recovery is performed without the differential pressure in the two cylinder vessels even at a pressure raising capability of 10 kgf / cm ² . When the low pressure gauge 25 reaches the negative pressure from the positive pressure, the valve 281 of the refrigerant recovery container 28 is closed, and the connecting valve 21 is removed from the service port of the three-way valve 18. Refrigerant recovery is completed.

(Embodiment 3)

In the third embodiment, an air conditioner using a refrigerant R410A having a refrigerant charge of 800 g with one indoor unit and one indoor unit will be described assuming that the compressor does not operate due to a failure. 6 shows a main configuration diagram and a connection relationship of the apparatus of the refrigerant recovery method. The outdoor unit 29 is provided with a two-way valve 30 and a three-way valve 31, and is connected to an indoor unit (not shown) through connection pipes 32 and 33. By connecting the connection valve 34 side to the service port portion of the three-way valve 31 of the outdoor unit 29, the intake check valve side of the refrigerant recovery pump 35 is connected through the pressure resistant hose 36. A needle valve 37, an oil separator 38, and a low pressure gauge 39 are provided on the path image of the pressure resistant hose 36. In addition, the exhaust check valve side of the refrigerant recovery pump 35 is connected to the refrigerant recovery container 41 through the internal pressure hose 40. A refrigerant recovery vessel 41 is a stainless steel vessel of a design pressure 45kg / cm ^2, internal volume 700cm ^3, there is a valve 411 installed refrigerant inlet. In addition, the synthetic zeolite 412 is filled in the refrigerant recovery container 41, and the position is fixed by the baffle 413. The synthetic zeolite used was 13X type, 1/12 inch diameter particles, 600 g. The coolant recovery container 41 is in a negative pressure state of 50 torr or less by using the coolant recovery pump 35 in advance so as to close the valve 411. The oil separator 38 used the same structure as that in the first embodiment.

The refrigerant recovery pump 35 is divided into two chambers in which a piston 352 is disposed inside the cylinder container 351, and a drive shaft 353 is connected to the piston 352. The drive shaft 353 is connected to the outer handle portion 354 through the cylinder container 351. One chamber side where the intake check valve 355a and the exhaust check valve 356a are provided at the top dead center position of the piston 352 on the one chamber side where the drive shaft 353 is installed, and the drive shaft 353 is not provided. The intake check valve 355b and the exhaust check valve 356b are provided at the bottom dead center position of the piston 352. The paths 20 at the intake check valves 355a and 355b are all connected to the pressure resistant hose 36 on the way, and the paths at the exhaust check valves 356a and 356b are connected to the pressure resistant hose 40 on the way. do. In addition, an O-ring 357 made of HNBR is provided at the outer circumference of the piston 352, and is designed to prevent leakage of refrigerant gas at the outer circumference of the piston 352. In addition, an O-ring (not shown) made of HNBR is also provided in the through hole where the drive shaft 353 is in contact with the cylinder container 351, and is designed to prevent leakage of refrigerant gas from the drive shaft 353. In addition, since the intake check valves 355a and 355b and the exhaust check valves 356a and 356b have substantially the same structures as those described in the first embodiment, description thereof is omitted.

Next, an operation procedure of the refrigerant recovery will be described.

First, the refrigerant recovery container 41 with the valve 411 closed and the refrigerant recovery pump 35 are connected to each other, and the internal pressure hose 36 is also connected to the refrigerant recovery pump 35. Next, the two-way valve 30 and the three-way valve 31 of the outdoor unit 29 are closed by the rotation of the hexagon wrench. Thereafter, the needle valve 37 is connected to the connection valve 34 in the service port portion of the three-way valve 31 in a closed state. At this time, the connection valve 34 is a form that can press the valve core protrusion provided in the three-way valve 31 and press inward. As a result, the pressure resistant hose 36 is in communication with the interior of the connection pipes 32 and 33, and the refrigerant gas reaches the needle valve 37 and stops. Next, by slightly opening the needle valve 37 which is in a closed state, the refrigerant gas remaining in the indoor unit and the connection pipes 32 and 33 is connected to the intake check valve 355a of the refrigerant recovery pump 35. The check valve 355b enters the cylinder container 351 to both sides, and the exhaust check valve 356a and the check valve 356b pass through the internal pressure hose 40 to the inlet valve 41 of the refrigerant recovery container 41. Up to 411). Thereafter, the valve 411 of the refrigerant recovery container 41 is opened. Thereby, the refrigerant gas also moves inside the refrigerant recovery container 41 and is physically adsorbed to the synthetic zeolite 282 filled therein. By slowly opening the needle valve 37, the refrigerant gas remaining inside the indoor unit and the connection pipes 32 and 33 is led to the refrigerant recovery container 41. At this time, the compressor oil remaining inside the indoor unit and the connecting pipes 32 and 33 is separated from the refrigerant gas and oil by an oil separator 38 disposed in the middle of slowly opening the needle valve 37, thereby allowing the refrigerant recovery pump. Oil can be prevented from entering the (35) side. In addition, even when the refrigerant gas moves to the refrigerant recovery pump 35 side at once, the handle 354 is hardly moved because the head of the cylinder container 351 is guided to both sides. Therefore, when using the refrigerant recovery pump 35 like Embodiment 3, it is thought that there is little worry about an operator injuries. Finally, after the needle valve 37 is completely opened, the refrigerant recovery container 41 and the inside of the indoor unit and the connection pipes 32 and 33 are waited for a while until the pressure becomes uniform. Afterwards, the opportunity to stop the movement of the refrigerant gas is driven in the direction of the handle 354 of the refrigerant recovery pump 35 so that the refrigerant gas on the side of the cylinder vessel 351 is the exhaust check valve 356b. At the same time, the refrigerant gas remaining in the indoor unit and the connection pipes 32 and 33 is taken in by the intake check valve 355a to the inside of the cylinder container 351. The refrigerant gas discharged from the exhaust check valve 356b is recovered into the refrigerant recovery container 41. By moving the handle part 354 of the refrigerant recovery pump 35 in the head direction, the refrigerant gas on the inner side of the cylinder container 351 is discharged from the exhaust check valve 356a, and the refrigerant recovery container 41 is provided. The refrigerant is recovered. At the same time, the refrigerant gas remaining in the indoor unit and the connection pipes 32 and 33 is sucked into the cylinder container 351 by the intake check valve 355b. By repeating the handle reciprocating operation, the refrigerant gas remaining inside the indoor unit and the connection pipes 32 and 33 is forcibly forced to the refrigerant recovery container 41 in any direction by driving the handle portion 354 in either direction. The refrigerant can be recovered. In addition, the amount of refrigerant gas remaining can be grasped by reading the pressure state with the low pressure gauge 39. Since the refrigerant gas pressure is at most 14.71 kgf / cm ² at 20 ° C of the refrigerant R410A, sufficient refrigerant recovery can be performed if the refrigerant recovery pump 35 has a boosting capacity of 15 kgf / cm ² . However, even if the pressure recovery capability of 10 kgf / cm ² , the refrigerant recovery pump having the same configuration as that in the third embodiment is considered to have some recovery capacity because the refrigerant recovery is performed without the differential pressure in the two cylinder vessels. When the low pressure gauge 39 reaches a negative pressure at a positive pressure, the valve 411 of the refrigerant recovery container 41 is closed, and the connecting valve 34 is removed from the service port portion of the three-way valve 31. Refrigerant recovery is completed.

In Embodiments 2 and 3, the 13X-type synthetic zeolite was filled into the refrigerant recovery container to recover the refrigerant. However, since the refrigerant has an adsorption capacity of about 25 wt% with respect to the weight of the synthetic zeolite even under normal pressure conditions, the refrigerant The workload for recovering the refrigerant in the recovery vessel has been significantly reduced.

(Embodiment 4)

In Embodiment 4, since an air conditioner using a refrigerant R22 having a refrigerant charge of 750 g is used for one outdoor unit, the compressor does not operate in a malfunction. Explain. Fig. 7 shows the main configuration diagram and connection relationship of the apparatus of the refrigerant recovery method. The outdoor unit 42 is provided with a two-way valve 43 and a three-way valve 44, and is connected to an indoor unit (not shown) through connection pipes 45 and 46. By connecting the connection valve 47 side to the service port portion of the three-way valve 44 of the outdoor unit 42, the intake check valve side of the refrigerant recovery pump 48 is connected through the pressure resistant hose 49. The needle valve 50, the oil separator 51, and the low pressure gauge 52 are provided in the path image of the pressure resistant hose 49. In addition, the exhaust check valve side of the refrigerant recovery pump 48 is connected to the refrigerant recovery container 54 through the internal pressure hose 53. A refrigerant recovery vessel 54 is a stainless steel vessel of a design pressure 30kg / cm ^2, internal volume 1200cm ^3, the coolant inlet port has a valve 541 is provided. The coolant recovery container 54 uses the coolant recovery pump 48 to close the valve 541 at a negative pressure of 50 torr or less in advance. The oil separator 51 used the same structure as that of the first embodiment.

The refrigerant recovery pump 48 is similar in construction to that used in the first embodiment. The piston 482 is disposed inside the cylinder container 481, and the piston 482 is divided into two chambers. The drive shaft 483 is connected to the piston 482, and the bis shaft 484 having a ball bearing is provided at the connecting portion. The drive shaft 483 protrudes outward through the cylinder vessel 481. An intake check valve 485 and an exhaust check valve 486 are provided at a bottom dead center position of the piston 482 on the one chamber side where the drive shaft 483 is not provided. The O-ring made of HNBR is provided on the piston 482. 487 is provided, and the piston 482 is designed to prevent leakage of refrigerant gas at the outer circumferential portion thereof. In addition, when the drive shaft 483 operates in the up and down direction, an elastomer 488 is provided in a portion of the cylinder container 481 that is in contact with the drive shaft 483. Since the intake check valve 485 and the exhaust check valve 486 have almost the same structures as those described in the first embodiment, description thereof is omitted.

The refrigerant recovery pump 48 is fixed to the substrate 55 by a screw, and a support column 56 is also fixed to the substrate 55 by a screw. The drive shaft 483 and the support column 56 of the refrigerant recovery pump 48 are connected by a handle bar 57. An end portion of the handle bar 57 is connected to the drive shaft 483 by a biss shaft 571 which is a first connection portion, and an intermediate portion of the handle bar 57 is supported by a support pillar 56 by a bis shaft 572 which is a second connection portion. It is connected. A ball bearing is provided in the bisshaft 571, and a ball bearing is provided in the bisshaft 572. Moreover, the handle part 573 becomes a place to which a worker actually exerts a force. For example, the distance between the non-axis 557 and the non-axis 557 is 1 and the distance between the non-axis 557 and the handle portion 573 is 3. When a force is applied to the handle portion 573, the biaxial shaft 572 becomes a support point, and the bisaxial shaft 571 becomes a working point, and the force applied to the handle portion 573 is 1/3 of the force applied directly to the drive shaft 483. It becomes the structure that becomes. With respect to the movement of the handle portion 573 in the up and down direction, the non-axis 557 becomes the support point, and the drive shaft 483 of the refrigerant recovery pump 48 moves up and down by operating the non-axis 557 in the handle axis direction. It works. At this time, since the bisve shaft 571 and the bisve shaft 572 are fixed, the operation direction of the drive shaft 483 is slightly different in the horizontal direction than the vertical direction with respect to the substrate 55. An elastomer 488 is installed at the portion where the drive shaft 483 is in contact with the cylinder container 481 so as to cope with the transverse gap, and the piston 482 and the drive shaft 483 are connected to the biaxial shaft 484. I am doing it. In addition, when the load is high as the refrigerant is compressed, the operator pulls the handle portion upward to perform the operation.

Next, an operation procedure of the refrigerant recovery will be described.

First, the refrigerant recovery container 54 with the valve 541 closed and the refrigerant recovery pump 48 are connected to each other, and the internal pressure hose 49 is also connected to the refrigerant recovery pump 48. Next, the valves of the two-way valve 43 and the three-way valve 44 of the outdoor unit 42 are left open, and the connecting valve is connected to the service port of the three-way valve 44 in the closed state. Connect with (47). At this time, the connection valve 47 is used in the form that can be pressed inward to the valve core protrusion provided on the three-way valve 44 at the same time. As a result, the pressure resistant hose 49 is in communication with the inside of the connecting pipe, and the refrigerant gas reaches the needle valve 50 and stops. Next, the refrigerant gas remaining in the outdoor unit 42, the indoor unit, and the connection pipes 45 and 46 by opening the needle valve 50 which is in the closed state is slightly opened for intake of the refrigerant recovery pump 48. From the valve 485 to the side of the cylinder container 481, it passes from the exhaust check valve 486 to the inlet valve 541 of the refrigerant recovery container 54 through the pressure-resistant hose 53 at once. Thereafter, the valve 541 of the refrigerant recovery container 54 is opened. This also causes the refrigerant gas to move into the refrigerant recovery container 54. By slowly opening the needle valve 50, the refrigerant gas remaining in the outdoor unit 42, the indoor unit, and the connection pipes 45 and 46 is led to the refrigerant recovery container 54. At this time, the compressor oil delivered to the pressure-resistant hose 49 in the outdoor unit 42, the indoor unit, and the connecting pipes 45 and 46 is refrigerant by the oil separator 51 disposed in the middle when the needle valve 50 is gradually opened. The gas and the oil are separated to prevent the oil from invading the refrigerant recovery pump 48 side. In addition, when the refrigerant gas moves toward the refrigerant recovery pump 48 at once, the handle portion 57 is driven downward, so that the handle portion 57 is driven downward in advance, and the piston 482 is in the top dead center position. It is preferable to arrange the needle valve 50 to open the valve. After the needle valve 50 is fully opened, it waits for a while until the movement of refrigerant gas stops. Afterwards, the handle portion 573 is driven upward in the light of opportunity, and the piston 482 is driven in the downward direction so that the refrigerant gas inside the cylinder container 481 is discharged from the exhaust check valve 486. The refrigerant gas is led to the refrigerant recovery container 54. In addition, by driving the handle portion 573 downward, the refrigerant gas remaining in the outdoor unit 42, the indoor unit, and the connection pipes 45 and 46 is taken into the cylinder container 481. By repeating the operation of the handle portion 573 up and down several times, the refrigerant gas remaining in the outdoor unit 42, the indoor unit, and the connection pipes 45 and 46 is forcibly transferred to the refrigerant recovery container 54. The refrigerant is recovered. In addition, the amount of refrigerant gas remaining can be grasped by reading the pressure state with the low pressure gauge 52. In the fourth embodiment, since the refrigerant gas dissolved in the compressor oil is gradually gasified and discharged to the refrigerant recovery pump side, it is necessary to abandon the operation when the pressure fluctuation value reaches a certain level with the low pressure gauge 52.

If the refrigerant recovery pump having the same configuration as the fourth embodiment utilizes the principle well, it is possible to have a boosting capability of 30 kgf / cm ² or more even if it is a manual type.

(Embodiment 5)

In Embodiment 5, since the compressor (not shown) mounted in the outdoor unit does not operate by a failure in an air conditioner using a refrigerant R410A with a refrigerant charge amount of 800 g per one indoor unit, a part replacement is performed in the field. In the following description, a case where the refrigerant is recovered is described. Fig. 8 shows the main configuration diagram and connection relationship of the apparatus of the refrigerant recovery method. The outdoor unit 58 is provided with a two-way valve 59 and a three-way valve 60, and is connected to an indoor unit (not shown) via connecting pipes 61 and 62. By connecting the connection valve 63 side to the service port of the three-way valve 60 of the outdoor unit 58, the intake check valve 644 side of the refrigerant recovery pump 64 is connected to the internal pressure hose 65 through the internal pressure hose 65. Connected. The needle valve 66, the oil separator 67, and the low pressure gauge 68 are provided in the path image of the pressure-resistant hose 65. As shown in FIG. In addition, the exhaust check valve 645 side of the refrigerant recovery pump 64 is connected to the refrigerant recovery container 70 through an internal pressure hose 69. A refrigerant recovery vessel (70) is a stainless steel vessel of a design pressure 45kg / cm ^2, internal volume 1200cm ^3, has a valve 701 is provided a refrigerant inlet port. The refrigerant recovery container 70 uses the refrigerant recovery pump 64 to close the valve 701 at a negative pressure of 50 torr or less in advance. As for the oil separator 67, the thing of the same structure as Embodiment 1 was used.

The refrigerant recovery pump 64 has substantially the same configuration as that used in Embodiment 2 shown in FIG. 5, and is divided into two chambers in which a piston 642 is disposed inside the cylinder container 641, and a drive shaft is provided in the piston 642. The 642 is connected, and the drive shaft 643 protrudes outward through the cylinder vessel 641. In addition, an intake check valve 644 is provided at a top dead center position of the piston 632 on the one side where the drive shaft 643 is provided. In addition, an exhaust check valve 645 is provided at the bottom dead center position of the piston 642 on the one chamber side where the drive shaft 643 is not provided. In addition, the check valve 646 is provided also in the piston 642, and it is the structure which prevents the refrigerant gas flow from the one chamber side in which the drive shaft 643 is not provided to the one chamber side in which the drive shaft 643 is provided. In addition, an O-ring 647 made of HNBR is provided at the outer peripheral portion of the piston 642, and is designed to prevent leakage of refrigerant gas at the outer peripheral portion of the piston 642. In addition, an O-ring (not shown) made of HNBR is provided in the through hole where the drive shaft 643 is in contact with the cylinder container 641, so as to prevent leakage of refrigerant gas from the drive shaft 643. In addition, since the intake check valve 644, the exhaust check valve 645, and the check valve 646 have substantially the same structure as those described in the second embodiment, description thereof is omitted.

The refrigerant recovery pump 64 is fixed to the substrate 71, and the support column 72 is also fixed to the substrate 70. The drive shaft 643 and the support column 72 of the refrigerant recovery pump 64 are connected by a handle bar 73. An end portion of the handle bar 73 is connected to the support pillar 72 by a second connecting portion bis shaft 731, and an intermediate portion of the handle bar 73 is connected to a driving shaft 643 by a bis shaft 732 which is a first connecting portion. It is connected. The biaxial shaft 732 is provided with a linear needle roller bearing for enabling operation in the handle axial direction, and the biaxial shaft 731 is provided with a needle roller bearing for rotational direction. Moreover, the handle part 733 becomes a place to which a worker actually exerts a force. For example, the distance between the non-axis 731 and the non-axis 732 is 1 and the distance between the non-axis 732 and the handle portion 733 is 3. When a force is applied to the handle portion 733, the biaxial shaft 731 becomes a support point, and the bisaxial shaft 732 becomes a working point, and the force applied to the handle portion 733 is one fourth of the force applied directly to the drive shaft 643. It becomes the structure that becomes. By providing the needle roller bearing for linear direction which enables the slide operation in the handle axial direction, the biscuit 731 serves as a supporting point against the vertical movement of the handle portion 733, and the biscuit 732 is By operating in the axial direction of the handle, the direction in which the drive shaft 643 of the refrigerant recovery pump 64 moves up and down could be maintained perpendicular to the substrate 71. In addition, as the refrigerant is compressed, the load is large when the operator pushes the handle portion downward.

Next, an operation procedure of the refrigerant recovery will be described.

First, the refrigerant recovery container 70 with the valve 701 closed and the refrigerant recovery pump 64 are connected to each other, and the internal pressure hose 65 is also connected to the refrigerant recovery pump 64. Next, the valves of the two-way valve 59 and the three-way valve 60 of the outdoor unit 58 are left open, and the connecting valve is closed with the needle valve 66 closed in the service port portion of the three-way valve 60. Connect with (63). At this time, the connection valve 63 is a form that can be pressed inward at the same time as fastening the valve core projection portion provided in the three-way valve (60). As a result, the pressure resistant hose 65 is in communication with the inside of the connecting pipe, and the refrigerant gas reaches the needle valve 66 and stops. Next, the refrigerant valve remaining in the outdoor unit 58, the indoor unit, and the connection pipes 61 and 62 by opening the needle valve 66 which is in a closed state is slightly opened for intake of the refrigerant recovery pump 64. The valve 644 enters the inlet side of the cylinder vessel 641, passes through the check valve 646 provided on the piston 642, moves to the side of the cylinder vessel 641, and withstands the internal pressure from the exhaust check valve 645. Passing through the hose 69 to the valve 701 of the refrigerant recovery container 70 at once. Thereafter, the valve 701 of the refrigerant recovery container 70 is opened. Thereby, the refrigerant gas also moves inside the refrigerant recovery vessel 70. By slowly opening the needle valve 66, the refrigerant gas remaining in the outdoor unit 58, the indoor unit, and the connection pipes 61 and 62 is led to the refrigerant recovery container 70. At this time, the compressor oil delivered to the pressure-resistant hose 65 in the outdoor unit, the indoor unit, and the connecting pipes 61 and 62 is gradually opened by the needle separator 66. The oil is separated, and oil can be prevented from entering the refrigerant recovery pump 64 side. Also, even when the refrigerant gas moves to the refrigerant recovery pump 64 side at once, if the flow resistance of the check valve 646 is small, the one chamber and the one chamber soon become uniform pressure. Therefore, by using the refrigerant recovery pump 64 as in the fifth embodiment, it is possible to prevent the handle bar 73 from operating suddenly. Finally, after the needle valve 66 is completely opened, the movement of the refrigerant gas is stopped due to the uniform pressure of the refrigerant recovery container 70 and the outdoor unit 58, the interior of the indoor unit, and the interior of the connecting pipes 61 and 62. By driving the handle portion 733 of the refrigerant recovery pump 64 downward in time, the piston 642 is also driven in the downward direction, so that the refrigerant gas inside the cylinder vessel 641 is exhausted. The refrigerant is discharged from the valve 645, and the discharged refrigerant gas is recovered into the refrigerant recovery container 70. At the same time, the refrigerant gas remaining in the outdoor unit 58, the indoor unit, and the connection pipes 61 and 62 is taken in from the intake check valve 644. By driving the handle portion 733 in the upward direction, the piston 642 is also driven in the head direction, so that the refrigerant gas inside the cylinder container 641 is in the upper chamber through the check valve 646 provided in the piston 642. Move to the side room. In addition, as the handle part 733 is moved downward, the refrigerant gas is compressed and recovered into the refrigerant recovery container 70 through the exhaust check valve 645. By repeating the operation of the handle portion 733 up and down several times, the refrigerant gas remaining in the outdoor unit 58, the indoor unit, and the inside of the connection pipes 61 and 62 is forcibly transferred to the refrigerant recovery container 70. The refrigerant is recovered. In addition, the amount of refrigerant gas remaining can be grasped by reading the pressure state using the low pressure gauge 68. In the case of the fifth embodiment, since the refrigerant gas dissolved in the compressor oil is gradually gasified and discharged to the refrigerant recovery pump 64 side, it is necessary to give up the work when the pressure fluctuation value reaches a certain level with the low pressure gauge 68. have. If the refrigerant recovery pump of the configuration as in the fifth embodiment utilizes the principle well, it was possible to have a boosting capacity of 30 kgf / cm ² or more even if it is a manual type.

By the way, in the present embodiment, a rubber made of CR is used as the O-ring of the refrigerant recovery pump and a rubber made of HNBR is used for the refrigerants R407C and R410A. As for the O-ring, it is necessary to select an optimum hardness while considering the refrigerant resistance and the oil resistance.

Moreover, in this embodiment, the needle roller bearing for linear direction was used for the bis shaft connected with the drive shaft of a refrigerant | coolant recovery pump, and the needle roller bearing for rotation direction was used for the bis shaft connected with the support column. In the case of providing the needle roller bearing for linear direction in the biaxial axis, it is considered that the connection portion provided in the middle portion of the handle rod is preferable. Moreover, the structure which can be used for this invention is not limited to this. Using this principle, it is required to have a structure in which the supporting point or the working point portion on which the force acts can be operated smoothly, and one side of the connecting portion can be slid in the direction of the handle bar. Therefore, a rolling bearing structure or a sliding bearing structure is preferable. As the rolling bearing structure, a ball bearing method can also be used, and as the sliding bearing structure, polytetrafluoroethylene-based or graphite-based materials can be used. It is also possible to supply grease for rolling bearing structures or sliding bearing structures in order to improve lubricity.

In this embodiment, all of the check valves using compression coil spring force, such as the intake check valve and the exhaust check valve of the refrigerant recovery pump, are used. However, the structure that can be used in the present invention is not limited thereto. Since the exhaust check valve side is in direct contact with the refrigerant gas, sufficient strength as the valve structure is required. In addition, when the intake check valve also does not have a pressure regulating valve in a ball valve or the like, strength as a valve structure is required. However, in the case of the intake check valve, if the compression coil spring force is too strong, the refrigerant recovery rate is lowered. That is, since the valve is switched by the differential pressure in the intake check valve, if the compression coil spring force is too strong, the refrigerant recovery operation is stopped at the valve switching limit point during the refrigerant recovery operation. Therefore, the spring constant of the compression coil spring used for the intake check valve is considered to be preferably about 0.3 to 0.6 N / mm. In addition, it is considered that about 0.4 to 0.8 N / mm larger than that is preferable as the exhaust check valve.

In addition, in this embodiment, although the refrigerant | coolant collection | recovery was performed about the air conditioner by which refrigerant | coolant R22, R407C, and R410A is filled, the use use of this invention is not limited to these. Since the refrigerant pressure R410A is about 1.6 times the refrigerant pressure for the same temperature condition as compared with the refrigerant R22, it is necessary to design a booster of the refrigerant recovery apparatus that can cope with it. In the configuration of the refrigerant recovery pump as in the first embodiment, since one chamber of the cylinder is configured to perform refrigerant gas compression work in the other chamber with respect to the atmospheric pressure state, it is accompanied by a considerably large compression load. If the same refrigerant recovery pump is configured, the two chambers in the cylinder container have a uniform refrigerant pressure relationship, so that the refrigerant recovery operation can be performed with a small load at first when the liquid refrigerant remains. However, at the same time as the refrigerant recovery operation, only the gas refrigerant is used, so the load on the refrigerant gas compression work increases. Accordingly, in order to increase the recovery rate of the refrigerant recovery from the air conditioner that cannot pump down or the refrigerant recovery including the refrigerant inside the outdoor unit, 10 to 30 kg / cm ² is required as a boosting capacity of the refrigerant recovery pump. Therefore, there is a limit to performing work by manpower. Therefore, it is necessary to design a small cross-sectional area of the cylinder container used for the pump for refrigerant recovery. In addition, when a synthetic zeolite having a large micropore diameter is filled into the refrigerant recovery container, it is possible to adsorb up to about 30 wt% of the synthetic zeolite by the physical adsorption action, thereby reducing the work load. Therefore, it was preferable that the synthetic zeolite had physical properties such that the carbon dioxide adsorption capacity was 20 wt% or more at a carbon dioxide partial pressure of 500 mmHg at 25 ° C.

In addition, in the case of a pump device for refrigerant recovery using the lever action, the maximum load caused by the work can be reduced by utilizing this principle. However, if the configuration is too extreme, the shape of the refrigerant recovery pump device becomes large and becomes large when the device is transported. Therefore, even if this principle is used, it is preferable to stop at the maximum work load reduction by about 1/2 to 1/5 by the structure of a support point, a working point, and a force point.

Since the present invention aims to recover refrigerant from an air conditioner without using electric power, this effect, which is also present in the embodiment of the present invention, and physical adsorption effects such as synthetic zeolite filling into a refrigerant recovery container. By investigating the configuration of the refrigerant recovery device for any refrigerant gas, the burden on the operator can be greatly reduced.

According to the present invention, the refrigerant gas remaining inside the indoor unit and the connection pipe is forcibly sucked and discharged by using the refrigerant recovery pump, and the refrigerant is recovered into the refrigerant recovery container. Since the refrigerant recovery pump used at this time is a simple structure in which a piston cylinder and a check valve are combined, the refrigerant recovery operation can be performed by the worker's own personnel without using equipment such as a power supply.

According to the present invention, the refrigerant gas remaining in the outdoor unit, the indoor unit, and the connection pipe is forcibly sucked and discharged by using the refrigerant recovery pump, and the refrigerant is recovered into the refrigerant recovery container. Since the refrigerant recovery pump used at this time is a simple configuration in which a piston cylinder and a check valve are combined, the refrigerant recovery operation can be performed by the worker by himself / herself without using equipment such as a power supply.

Further, according to the present invention, when the piston of the refrigerant recovery pump is moved by the force to the drive shaft, the operation of exhausting the refrigerant gas is a compression work, which requires a very large load. The maximum load can be reduced, and workability in the workforce is greatly improved.

Further, according to the present invention, since the synthetic zeolite itself physically adsorbs the refrigerant by about 20 to 30 wt% by filling the inside of the refrigerant recovery container with a large pore diameter, the refrigerant gas is stored in the refrigerant recovery container. The physical workload of recovering by mechanically compressing the oil into the refrigerant recovery pump is greatly reduced.

In addition, according to the present invention, by installing an oil separator on the path diagram of the intake check valve and the service port connecting valve, the compressor oil remaining inside the indoor unit and the connecting pipe is sufficiently separated, and only the refrigerant gas is used as the refrigerant recovery pump. Can lead.

In addition, according to the present invention, the driving shaft of the refrigerant recovery pump is connected to one end of the handle rod with the support column as a support point, and the operator applies a force to the other end to force the piston of the refrigerant recovery pump to the driving shaft. By using this action, the maximum load required for the exhaust operation can be reduced by using this action for the load of the required refrigerant gas compression work when moving by, thereby greatly improving the workability in the manpower.

In addition, according to the present invention, one end of the handle bar is a support point for the support column, and the driving shaft of the pump for recovering the refrigerant is connected to the middle part of the handle bar to become an operating point. When the piston of the recovery pump is moved by the force to the drive shaft, the load of the refrigerant gas compression work required is provided between the support point and the force point to reduce the maximum load required for the exhaust operation by making this function effective. It is possible, and workability is greatly improved by manpower.

Further, according to the present invention, the effect of intake and exhaust of the refrigerant gas can be generated using only one chamber with respect to the cylinder container of the refrigerant recovery pump.

According to the present invention, the check valve is provided on the piston for the cylinder container of the refrigerant recovery pump, so that the pressure difference between the two chambers inside the divided cylinder container is small, so that the work load on the operator can be reduced. .

According to the present invention, an intake check valve and an exhaust check valve are respectively provided in two internal chambers divided with respect to the cylinder container of the refrigerant recovery pump. The work is compressed and discharged to the outside, while the other side can perform the refrigerant gas introduction operation to the inside of the cylinder container in parallel, thereby greatly improving workability. Moreover, since the pressure difference is small with respect to the two chambers inside the divided cylinder container, the work load to an operator can also be reduced.

Furthermore, according to the present invention, if the carbon dioxide adsorption capacity at a carbon dioxide partial pressure of 500 mmHg at 25 ° C is 20 wt% or more as a synthetic zeolite, the fine pore diameter is also large, so that the refrigerant can be adsorbed quickly and efficiently. .

Claims (15)

Refrigerant recovery method from an air conditioner configured by connecting an indoor unit and an outdoor unit with a connecting pipe, The outdoor unit is provided with a two-way valve and a three-way valve as a connection port, (1) closing the two-way valve and the three-way valve together; (2) connecting a pump for refrigerant recovery to the service port of the three-way valve; (3) connecting a refrigerant recovery container to the refrigerant recovery pump, and (4) At least a piston, an intake check valve and an exhaust check valve are provided inside the cylinder container, and the intake and exhaust valves are operated by operating the intake check valve and the exhaust check valve by driving the piston. Has a step of generating an effect, And a refrigerant recovery method from an air conditioner for recovering the refrigerant remaining in the indoor unit and the connection pipe into the refrigerant recovery container. Refrigerant recovery method from an air conditioner configured by connecting an indoor unit and an outdoor unit with a connecting pipe, The outdoor unit is provided with a two-way valve and a three-way valve as a connection port, (1) opening the two-way valve and the three-way valve together; (2) connecting a pump for refrigerant recovery to the service port of the three-way valve; (3) connecting a refrigerant recovery container to the refrigerant recovery pump, and (4) At least a piston, an intake check valve and an exhaust check valve are provided inside the cylinder container, and the intake and exhaust valves are operated by operating the intake check valve and the exhaust check valve by driving the piston. Has a step of generating an effect, And a refrigerant recovery method from an air conditioner for recovering the refrigerant remaining in the outdoor unit, the indoor unit, and the connection pipe into the refrigerant recovery container. The method of claim 1 or 2, wherein the driving of the piston comprises: A drive shaft is connected to the piston, and the drive shaft protrudes outward through the cylinder vessel, and applies a force to one end of the drive shaft. The method of claim 1 or 2, wherein the driving of the piston comprises: A drive shaft is connected to the piston, and the drive shaft passes through the cylinder vessel and protrudes to the outside, and applies a force by a lever action to the drive shaft. The method according to claim 1 or 2, wherein in the step of connecting a refrigerant recovery container to the refrigerant recovery pump, A method for recovering refrigerant from an air conditioner, wherein a synthetic zeolite is filled in the refrigerant recovery container. The method of claim 1 or 2, wherein the refrigerant recovery pump is connected to the service port of the three-way valve. And an oil separator is provided on a path diagram connecting the service port portion of the three-way valve to the refrigerant recovery pump. The method of claim 3, wherein in driving the piston: The inside of the cylinder container is divided into two chambers by the piston, and the intake check valve and the exhaust check valve are arranged on one chamber side in which the drive shaft is not provided. . The method of claim 3, wherein in driving the piston: The inside of the cylinder container is divided into two chambers by the piston, the intake check valve is disposed on one chamber side in which the drive shaft is installed, and the exhaust check valve is disposed on the other chamber side on which the drive shaft is not provided. And a check valve is provided on the piston to prevent flow from the one chamber side in which the drive shaft is installed to the other chamber side in which the drive shaft is not provided. The method of claim 3, wherein in driving the piston: The inside of the cylinder container is divided into two chambers from the piston, and each inlet chamber is provided with the intake check valve and the exhaust check valve, and the intake check valve side paths provided in each chamber are connected from the outside. And at the same time, the exhaust check valve side paths provided in each chamber are also connected externally. The method of claim 4, wherein the driving of the piston by the lever action, The drive shaft penetrates through the cylinder container to the outside and is connected to one end of the handle bar and the first connection part, and the handle bar is connected to the second connection part together with the support pillar, and the second connection part is a support point. A method for recovering refrigerant from an air conditioner, characterized in that the connecting portion is a function point and the other end of the handle rod is a force point. The method of claim 4, wherein the driving of the piston by the lever action, The drive shaft is projected to the outside through the cylinder container is connected to the handle rod and the first connection portion, one end of the handle rod is connected at the second connection portion with a support pillar, the second connection portion as a support point, A method for recovering refrigerant from an air conditioner, characterized in that the connecting portion is a function point and the other end of the handle rod is a force point. The method of claim 4, wherein in driving the piston, The inside of the cylinder container is divided into two chambers by the piston, and the intake check valve and the exhaust check valve are arranged on one chamber side in which the drive shaft is not provided. . The method of claim 4, wherein in driving the piston, The inside of the cylinder container is divided into two chambers by the piston, the intake check valve is disposed on one chamber side in which the drive shaft is installed, and the exhaust check valve is disposed on the other chamber side in which the drive shaft is not provided. And a check valve provided on the piston and preventing flow from the one chamber side in which the driving shaft is installed to the one chamber side in which the driving shaft is not provided. The method of claim 4, wherein in driving the piston, The inside of the cylinder container is divided into two chambers from the piston, and each inlet chamber is provided with the intake check valve and the exhaust check valve, and the intake check valve side paths provided in each chamber are connected from the outside. And at the same time, the exhaust check valve side paths provided in each of the one chambers are also externally connected. The method for recovering refrigerant from an air conditioner according to claim 5, wherein the synthetic zeolite has a carbon dioxide adsorption capacity of 20 wt% or more at a carbon dioxide partial pressure of 500 mmHg at 25 ° C.