JPH10132429A - Refrigerant recovery apparatus for refrigerating cycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately accumulate and recover a refrigerant into a refrigerant recovery container by a method wherein a refrigerant recovery container for accumulating a refrigerant is provided in the course of a pipeline between a compressor and a condenser, a valve on both sides of the container and the refrigerant recovery container containing the valve is removed from a refrigerating cycle. SOLUTION: A refrigerant pressurized by a compressor 1 enters a condenser 2 via a first manual valve, a muffler 8 and a second manual valve 9 to radiate heat being liquefied. Thereafter, the refrigerant is evaporated by an evaporator 4 while being decompressed by a decompression device 3 to cool the inside of a storage. In the recovery of the refrigerant associated with the discarding of a refrigerator, firstly, the second manual valve 9 is closed to accumulate the refrigerant in the refrigerating cycle into the muffler 8 and then, after the first manual valve 7 is closed, a circulation pipe 5 is cut off between the compressor 1 and the first manual valve 7 and between the second manual valve 9 and the condenser 2. The muffler 8 is cut off the refrigerating cycle while being closed by both the manual valves 7 and 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant recovery device for a refrigeration cycle.

[0002]

2. Description of the Related Art In general, when disposing a refrigerator or a refrigerator / refrigerator having a refrigerating cycle formed by connecting a compressor, a condenser, a decompressor and an evaporator in order, protection of the ozone layer and global warming. From the standpoint of prevention, recovery or decomposition of the refrigerant in the refrigeration cycle is essential. FIG. 13 is a view showing a conventional refrigerant recovery method, in which a circulation pipe 5 between the compressor 1 and the condenser 2 of the refrigeration cycle including the compressor 1, the condenser 2, the decompressor 3 and the evaporator 4 is provided. A hole is formed, the refrigerant is collected in a separately prepared refrigerant collection bag 6 through the hole, collected in a larger-capacity recovery device, and reused or decomposed.

[0003]

However, since the refrigerant is generally collected after transporting the discarded refrigerator or refrigerator / refrigerator to the treatment plant, the above-mentioned conventional recovery method uses the discarded refrigerator or refrigerator.・ While transporting the refrigerator, the circulation pipe may be damaged due to mishandling, etc., and the refrigerant may be released into the atmosphere. It was necessary and it was very difficult to manage the waste refrigerator and the freezer / refrigerator.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a refrigerant recovery apparatus for a refrigeration cycle according to the present invention has a compressor, a condenser, a decompressor and a compressor. In a refrigeration cycle in which evaporators are sequentially connected,
A refrigerant recovery container for storing refrigerant is provided in the middle of the pipeline between the compressor and the condenser, and valves are provided on both sides of the container, and the refrigerant recovery container including both valves is removed from the refrigeration cycle. It is characterized by doing.

Therefore, according to this configuration, when recovering the refrigerant, the valve on the outlet side of the refrigerant recovery container is closed to store the refrigerant in the refrigeration cycle in the refrigerant recovery container, and then the other valve is closed and both valves are closed together. The refrigerant recovery container will be removed from the refrigeration cycle. As a result, when the refrigerant is collected, the valves on both sides of the refrigerant collection container are sequentially closed, so that the refrigerant can be reliably collected and collected in the refrigerant collection container, and the conventional method that damages the circulation pipe can be obtained. Problems can be avoided. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

According to a second aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle, wherein a pipe between the compressor and the condenser is provided in a refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are sequentially connected. A refrigerant recovery container for storing refrigerant is provided in the middle of the path, and a thick pipe having a small diameter is provided in a pipe on both sides of the container, and the pipe is closed with the pipe so that the refrigerant recovery container is removed from the refrigeration cycle. It is characterized by doing.

Therefore, according to this configuration, when recovering the refrigerant, the pipe portion on the outlet side of the refrigerant recovery container is closed to store the refrigerant in the refrigeration cycle in the refrigerant recovery container, and then the other pipe portion is closed. For both pipe parts, the refrigerant recovery container is removed from the refrigeration cycle. As a result, when collecting the refrigerant, the pipes on both sides of the refrigerant collection container are sequentially closed, so that the refrigerant can be reliably collected and collected in the refrigerant collection container, and the conventional method that damages the circulation pipe can be achieved. Problems can be avoided. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

According to a third aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle, comprising: a pipe between the compressor and the condenser in a refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are sequentially connected. A refrigerant recovery container for storing refrigerant in the middle of the path is provided, and a check valve is provided between the inlet side of the refrigerant recovery container and the compressor and between the outlet side of the refrigerant recovery container and the condenser. The present invention is characterized in that a valve or a pipe portion having a small diameter with a thick wall is provided, and the refrigerant recovery container including the check valve and the valve or the pipe portion is detached from the refrigeration cycle.

Therefore, according to this configuration, at the time of refrigerant recovery, the outlet side of the refrigerant recovery container is closed by the valve or the pipe portion, the refrigerant in the refrigeration cycle is stored in the refrigerant recovery container, and the inlet side is then checked. Both the valve and the valve or pipe section will remove the refrigerant recovery container from the refrigeration cycle. As a result, when the refrigerant is collected, the both sides of the refrigerant collection container are sequentially closed, so that the refrigerant can be reliably collected and collected in the refrigerant collection container, and the conventional problems such as damaging the circulation pipe. Can be avoided. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

According to a fourth aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle, wherein a refrigerant, a condenser, a decompressor, and an evaporator are connected in sequence in a refrigeration cycle. A two-way valve having an inlet connected to the compressor and a first outlet connected to the condenser is provided in the middle of the path, and a second outlet of the two-way valve is provided with a thick, thin pipe, check valve or valve. And a refrigerant collection container is connected to the refrigerant collection container, and the refrigerant collection container including the thin pipe, check valve or valve is detached from the refrigeration cycle.

Therefore, according to this configuration, when the refrigerant is recovered, the inlet of the two-way valve is communicated with the second outlet to allow the refrigerant in the refrigeration cycle to flow through the two-way valve, a thick and small-diameter pipe, and a check valve. Alternatively, the refrigerant is stored in the refrigerant recovery container via a valve, and then the refrigerant recovery container is removed from the refrigeration cycle together with the thick, thin pipe, check valve, or valve. as a result,
When collecting the refrigerant, the refrigerant can be collected and collected in the refrigerant recovery container simply by connecting the compressor and the refrigerant recovery container via the two-way valve, thereby avoiding the conventional problems such as damaging the circulation pipe. can do. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

According to a fifth aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle according to the fourth aspect, wherein the refrigerant recovery container is disposed near an evaporator. I have. Therefore, according to this configuration, the refrigerant recovery container is cooled during the normal operation of the refrigeration cycle, and the refrigerant accumulated in the refrigerant recovery container during the recovery of the refrigerant is cooled and liquefied. As a result, the size of the refrigerant recovery container can be reduced, and the handling is simplified.

According to a sixth aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle.
And a valve, a small-diameter pipe or a check valve provided on the inlet side of the first condenser near the compressor side, and a valve or a small-diameter pipe provided on the outlet side. And the first condenser including the valve, the thin pipe or the check valve is detached from the refrigeration cycle.

Therefore, according to this configuration, during normal operation, the first and second condensers work together to exhibit a function as a condenser, and serve as a refrigeration cycle together with other compressors, pressure reducing devices and evaporators. Drive. When recovering the refrigerant, first, the outlet side of the first condenser is closed by a valve or a pipe on the outlet side of the first condenser to store the refrigerant in the first condenser. The refrigerant is recovered by removing the first condenser from the refrigeration cycle, including the pipe having a small valve diameter or the check valve and the valve or pipe on the outlet side. As a result, when the refrigerant is collected, both sides of the first condenser are sequentially closed, so that the refrigerant can be reliably collected and collected in the refrigerant collection container, and the conventional problem that the circulation pipe is damaged is obtained. The point can be avoided. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. [First Embodiment] FIG. 1 is a diagram showing a refrigeration cycle of a refrigerator according to a first embodiment of the present invention. In the figure, 1 is a compressor, 2 is a condenser, 3 is a decompressor, and 4 is an evaporator, forming a normal refrigeration cycle. In this embodiment, the circulation pipe 5 between the compressor 1 and the condenser 2 is provided with a muffler 8 having a sufficient capacity with respect to the amount of the sealed refrigerant, and first and second mufflers 8 are provided before and after the muffler 8. Second manual valves 7 and 9 are provided.

In this configuration, during normal operation as a refrigeration cycle, the two manual valves 7 and 9 are opened and used. As a result, the refrigerant (gas) pressurized by the compressor 1 enters the condenser 2 via the first manual valve 7, the muffler 8 and the second manual valve 9, and is liquefied and radiated. Thereafter, the pressure is reduced by the decompressor 3 and the evaporator 4 evaporates to cool the inside of the storage. At this time, the muffler 8 has a function of reducing pulsation during the compression operation of the compressor 1.

When recovering the refrigerant accompanying the disposal of the refrigerator, first, the second manual valve 9 is closed to store the refrigerant in the refrigeration cycle in the muffler 8, and after the completion of this operation, the first
After closing the manual valve 7, the circulation pipe 5 is cut off between the compressor 1 and the first manual valve 7 and between the second manual valve 9 and the condenser 2 and closed by the two manual valves 7, 9. In this state, the muffler 8 is separated from the refrigeration cycle.

[Second Embodiment] In this second embodiment, as shown in FIG. 2, a muffler 8 of the circulation pipe 5 is used instead of the manual valves 7 and 9 in the first embodiment. The portions 10 and 11 located at both ends are formed of thick and thin pipes (however, the inside diameter is sufficiently larger than the pressure reducing device 3). In this embodiment, during normal operation, operation is performed in the same manner as in the first embodiment. At the time of collecting the refrigerant accompanying the disposal of the refrigerator, the part 11 of the circulation pipe 5 is pressed and cut to store the refrigerant in the refrigeration cycle in the muffler 8.
Press and cut to separate from the refrigeration cycle.

[Third Embodiment] In the third embodiment, instead of the manual valves 7 and 9 in the first embodiment, as shown in FIG. Are provided with first and second electromagnetic valves 12 and 13 at both ends. In this embodiment, during normal operation, the compressor 1 is driven in a state where the electromagnetic valves 12 and 13 are energized and the electromagnetic valves are opened to operate the refrigeration cycle. Subsequent driving operations are the same as in the first embodiment.

At the time of collecting the refrigerant accompanying the disposal of the refrigerator, the connector of the second electromagnetic valve 13 is first disconnected to stop the energization, thereby closing the electromagnetic valve 13 and storing the refrigerant in the refrigeration cycle in the muffler 8. After completing this work,
The connector of the other first electromagnetic valve 12 is disconnected to stop energization, the first electromagnetic valve 12 is closed, and then the compressor 1 and the first electromagnetic valve 12 and the second electromagnetic valve 13 are connected. The muffler 8 is separated from the refrigeration cycle while the circulation pipe 5 is cut between the condensers 2 and both electromagnetic valves 12 and 13 are closed.

[Fourth Embodiment] In the fourth embodiment, instead of the manual valve 7 in the first embodiment, as shown in FIG. A check valve 14 is provided between the mufflers 8. And
In this embodiment, during the normal operation, the manual valve 9 is used.
Open and use. As a result, the refrigerant (gas) pressurized by the compressor 1 enters the condenser 2 via the check valve 14, the muffler 8 and the manual valve 9, and is liquefied and radiated. Thereafter, the pressure is reduced by the decompressor 3 and the evaporator 4 evaporates to cool the inside of the storage.

When the refrigerant is collected when the refrigerator is discarded, first, the manual valve 9 is closed to store the refrigerant in the refrigeration cycle in the muffler 8. At this time, the refrigerant that has entered the muffler 8 by the check valve 14 does not leave the muffler 8. After this operation is completed, the circulation pipe 5 is cut between the compressor 1 and the check valve 14 and between the manual valve 9 and the condenser 2 and the muffler 8 is closed with the check valve 14 and the manual valve 9 closed.
Disconnect from the refrigeration cycle.

[Fifth Embodiment] In the fifth embodiment, the inlet side of the compressor 1 is located between the compressor 1 and the condenser 2.
And a first outlet of the two-way valve 15 is connected to the condenser 2 and a second outlet of the two-way valve 15 is connected to a refrigerant recovery container 17 through a thick and small-diameter pipe 16. Connected to In such a configuration, during normal operation, the two-way valve 15 is set so that the inlet and the first outlet communicate with each other, and the refrigerant from the compressor 1 flows only to the condenser 2. As a result, the refrigeration cycle performs a normal operation, and the inside of the refrigerator is cooled by the evaporator 4.

On the other hand, at the time of collecting the refrigerant accompanying the disposal of the refrigerator, the two-way valve 15 is switched by an electric operation to communicate the inlet and the second outlet, and the compressor 1 side is connected via a pipe 16 to a refrigerant collection container. 17 is connected. As a result, the refrigerant in the refrigeration cycle flows into the refrigerant recovery container 17 via the two-way valve 15 and the pipe 16 and is stored. After this operation is completed, the pipe 16 is closed, and the refrigerant recovery container 17 is separated from the refrigeration cycle. In this embodiment, the refrigerant recovery container 17 may be replaced with a refrigerant recovery bag.

Sixth Embodiment In this embodiment, the refrigerant recovery container 17 of the fifth embodiment is installed near the evaporator 4 as shown in FIG.
According to this configuration, during the normal operation of the refrigeration cycle, the refrigerant recovery container 17 is cooled by the evaporator 4 and maintained at a low temperature. On the other hand, at the time of collecting the refrigerant accompanying the disposal of the refrigerator, the two-way valve 15 is switched to the refrigerant recovery container 17 side as described above. 16 and the refrigerant recovery container 1
Flow into 7. At this time, since the refrigerant recovery container 17 is cooled to a low temperature, the refrigerant liquefies from gas due to the temperature difference,
It is stored in the refrigerant recovery container 17.

[Seventh Embodiment] In this embodiment, instead of the pipe 16 of the fifth embodiment, a reverse valve is provided between a two-way valve 15 and a refrigerant recovery container 17 as shown in FIG. A stop valve 14 is provided. Therefore, in this embodiment, the compressor 1 is connected to the refrigerant recovery container 17 via the check valve 14 by connecting the inlet of the two-way valve 15 to the second outlet when recovering the refrigerant accompanying the disposal of the refrigerator. Then, the refrigerant is stored in the refrigerant recovery container 17. Thereafter, the pipe is closed between the two-way valve 15 and the check valve 14, and the refrigerant recovery container 17 is removed from the refrigeration cycle together with the check valve 15.

[Eighth Embodiment] In this embodiment, the condenser 2 in the first embodiment is divided into first and second condensers 2a and 2b as shown in FIG.
The former first condenser 2 a is provided at the position of the muffler 8 instead of the muffler 8. Therefore, according to this embodiment, the refrigeration cycle enters a normal operation by opening the first and second manual valves 7 and 9 to drive the compressor 1, and the refrigerant sent from the compressor 1 First condenser 2a
And the second condenser 2b sequentially radiates and liquefies, and thereafter,
The pressure is reduced by the pressure reducing device 3, further evaporated by the evaporator 4, and returned to the compressor 1 again.

When recovering the refrigerant upon disposal of the refrigerator, first, the second manual valve 9 is closed to collect and recover the refrigerant in the refrigeration cycle in the first condenser 2a.
After closing the first manual valve 7, the first manual valve 7 is closed between the compressor 1 and the first condenser 2 a and the second manual valve 9 and the second condenser 2
The first condenser 2a is removed from the refrigerating cycle together with the two manual valves by closing the pipe between the first condenser 2a and the first condenser 2b.

[Ninth Embodiment] In this embodiment, the manual valves 7 and 9 according to the eighth embodiment are used.
Instead, as shown in FIG. 9, the pipe portions 10 and 11 having a large thickness and a small diameter shown in the second embodiment are provided.
According to this configuration, at the time of collecting the refrigerant accompanying the disposal of the refrigerator, the portion 11 of the circulation pipe 5 is pressed and cut to store the refrigerant in the refrigeration cycle in the first condenser 2a.
After this operation is completed, the part 10 is pressed and cut to separate it from the refrigeration cycle.

[Tenth Embodiment] In this embodiment, the manual valves 7 and 9 of the eighth embodiment are used.
Instead of this, the first and second electromagnetic valves 12 and 13 shown in the third embodiment are provided as shown in FIG. According to this configuration, when the refrigerant is collected upon disposal of the refrigerator, first, the connector of the second electromagnetic valve 13 is disconnected to stop energization, thereby closing the second electromagnetic valve 13 and closing the refrigeration cycle. Refrigerant into the first condenser 2
a, and after completion of this work, the first electromagnetic valve 12
Of the compressor and the electromagnetic valve 12 is closed to close the electromagnetic valve 12. Then, the circulation pipe 5 is connected between the compressor 1 and the first electromagnetic valve 12 and between the second electromagnetic valve 13 and the condenser 2.
And the first condenser 2a is disconnected from the refrigeration cycle in a state where both the electromagnetic valves 12, 13 are closed.

[Eleventh Embodiment] In this embodiment, the first manual valve 7 in the eighth embodiment is used.
, A check valve 14 is provided. According to this configuration, at the time of collecting the refrigerant accompanying the disposal of the refrigerator, first, the second manual valve 9 is closed and the refrigerant in the refrigeration cycle is discharged to the first manual valve.
And collected in the condenser 2a, and then closed the pipes between the compressor 1 and the check valve 14 and between the second manual valve 9 and the second condenser 2b. The vessel 2a is removed from the refrigeration cycle together with the check valve 14 and the second manual valve 9.

[Twelfth Embodiment] In the twelfth embodiment, the first condenser 2a,
As shown in FIG. 12, the second condenser 2b is arranged close to each other, and a common condenser cooling fan motor 18 is provided for both the condensers 2a and 2b. And during normal operation in this configuration,
By driving this condenser cooling fan motor 18, the fan 1
By rotating 9, wind is applied to both condensers to promote heat dissipation of the refrigerant. In this way, by blowing the wind to the condenser by driving the fan motor 18, the size of the condenser can be reduced.

On the other hand, when recovering the refrigerant due to the disposal of the refrigerator, first, the second manual valve 9 is closed to collect and recover the refrigerant in the refrigeration cycle in the first condenser 2a. After closing the valve 7, the compressor 1 and the first condenser 2 a and the second manual valve 9 and the second condenser 2 b
And the first condenser 2a is removed from the refrigeration cycle together with the two manual valves. Of course, the cooling of the condenser by the condenser cooling fan motor 18 can be provided also in the ninth embodiment.

[0034]

The present invention is constructed as described above. In particular, the refrigerant recovery apparatus for a refrigeration cycle according to the first aspect of the present invention includes a compressor, a condenser, a decompressor, and an evaporator which are sequentially connected. In the refrigeration cycle, a refrigerant recovery container for storing refrigerant is provided in the middle of the pipe between the compressor and the condenser, and valves are provided on both sides of the container.The refrigerant recovery container including both valves is provided. It is configured to be removed from the refrigeration cycle.

Therefore, according to the present invention, when recovering the refrigerant, the valve on the outlet side of the refrigerant recovery container is closed to store the refrigerant in the refrigeration cycle in the refrigerant recovery container, and then the other valve is closed and both valves are closed together. Since the refrigerant recovery container is removed from the refrigeration cycle, the refrigerant can be reliably collected and recovered in the refrigerant recovery container, and the conventional problems such as damaging the circulation pipe can be avoided. . Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

According to a second aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle, comprising: a refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are sequentially connected; A refrigerant recovery container for storing refrigerant is provided in the middle of the path, and a thick pipe having a small diameter is provided in a pipe on both sides of the container, and the pipe is closed with the pipe so that the refrigerant recovery container is removed from the refrigeration cycle. This is the configuration.

Therefore, according to the present invention, at the time of refrigerant recovery, the pipe portion on the outlet side of the refrigerant recovery container is closed to store the refrigerant in the refrigeration cycle in the refrigerant recovery container, and then the other pipe portion is closed. The refrigerant recovery container is removed from the refrigeration cycle for both pipe parts, so the refrigerant can be reliably collected and recovered in the refrigerant recovery container, avoiding the conventional problems of damaging the circulation pipe can do. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

According to a third aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle, comprising: a refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are sequentially connected; A refrigerant recovery container for storing refrigerant in the middle of the path is provided, and a check valve is provided between the inlet side of the refrigerant recovery container and the compressor and between the outlet side of the refrigerant recovery container and the condenser. In this configuration, a valve or a thin pipe portion having a large thickness is provided, and the refrigerant recovery container including the check valve and the valve or the pipe portion is detached from the refrigeration cycle.

Therefore, according to the present invention, when recovering the refrigerant, the outlet side of the refrigerant recovery container is closed by the valve or the pipe portion, the refrigerant in the refrigeration cycle is stored in the refrigerant recovery container, and then the check on the inlet side is performed. Since both the valve and the valve or the pipe or the pipe section remove the refrigerant recovery container from the refrigeration cycle, the refrigerant can be reliably collected and collected in the refrigerant recovery container, and the conventional refrigerant pipes are damaged. Problems can be avoided. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

According to a fourth aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle, wherein a refrigerant, a condenser, a decompressor, and an evaporator are connected in sequence in a refrigeration cycle. A two-way valve having an inlet connected to the compressor and a first outlet connected to the condenser is provided in the middle of the path, and a second outlet of the two-way valve is provided with a thick, thin pipe, check valve or valve. And a refrigerant collection container is connected to the refrigeration cycle, and the refrigerant collection container including the small-diameter pipe, check valve or valve is detached from the refrigeration cycle.

Therefore, according to the present invention, when the refrigerant is recovered, the inlet of the two-way valve and the second outlet are communicated to allow the refrigerant in the refrigeration cycle to flow through the two-way valve, a thick and thin pipe, and a check valve. Alternatively, the refrigerant is stored in the refrigerant recovery container via a valve, and then the refrigerant recovery container is removed from the refrigeration cycle together with the thick, thin pipe, check valve, or valve. as a result,
When collecting the refrigerant, the refrigerant can be collected and collected in the refrigerant recovery container simply by connecting the compressor and the refrigerant recovery container via the two-way valve, thereby avoiding the conventional problems such as damaging the circulation pipe. can do. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

According to a fifth aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle according to the fourth aspect, wherein the refrigerant recovery container is disposed near an evaporator. Therefore, according to the present invention, the refrigerant recovery container is cooled during the normal operation of the refrigeration cycle, and the refrigerant accumulated in the refrigerant recovery container during the recovery of the refrigerant is cooled and liquefied. As a result, the size of the refrigerant recovery container can be reduced, and the handling is simplified.

According to a sixth aspect of the present invention, there is provided a refrigerant recovery apparatus for a refrigeration cycle, comprising a compressor, a condenser, a decompressor, and an evaporator which are sequentially connected to each other.
And a valve, a small-diameter pipe or a check valve provided on the inlet side of the first condenser near the compressor side, and a valve or a small-diameter pipe provided on the outlet side. And the first condenser including the valve, the small-diameter pipe or the check valve is removed from the refrigeration cycle.

Therefore, according to the present invention, during normal operation, the first and second condensers work together to exhibit a function as a condenser, and as a refrigeration cycle together with other compressors, pressure reducing devices and evaporators. Drive. When recovering the refrigerant, first, the outlet side of the first condenser is closed by a valve or a pipe on the outlet side of the first condenser to store the refrigerant in the first condenser. The refrigerant is recovered by removing the first condenser from the refrigeration cycle, including the pipe having a small valve diameter or the check valve and the valve or pipe on the outlet side.

As a result, when the refrigerant is collected, both sides of the first condenser are sequentially closed, so that the refrigerant can be reliably collected and collected in the refrigerant collection container, and damage to the circulation pipe may be caused. Conventional problems can be avoided. Moreover, the work is extremely simple and can be performed in a short time, so that the management of the waste refrigerator is facilitated.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a refrigeration cycle including a refrigerant recovery device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a refrigeration cycle including a refrigerant recovery device according to a second embodiment of the present invention.

FIG. 3 is a diagram showing a refrigeration cycle provided with a refrigerant recovery device according to a third embodiment of the present invention.

FIG. 4 is a diagram illustrating a refrigeration cycle including a refrigerant recovery device according to a fourth embodiment of the present invention.

FIG. 5 is a diagram illustrating a refrigeration cycle including a refrigerant recovery device according to a sixth embodiment of the present invention.

FIG. 6 is a diagram illustrating a refrigeration cycle including a refrigerant recovery device according to a seventh embodiment of the present invention.

FIG. 7 is a diagram illustrating a refrigeration cycle including a refrigerant recovery device according to an eighth embodiment of the present invention.

FIG. 8 is a diagram showing a refrigeration cycle including a refrigerant recovery device according to a ninth embodiment of the present invention.

FIG. 9 is a diagram illustrating a refrigeration cycle including a refrigerant recovery device according to a ninth embodiment of the present invention.

FIG. 10 is a diagram showing a refrigeration cycle including a refrigerant recovery device according to a tenth embodiment of the present invention.

FIG. 11 is a diagram showing a refrigeration cycle provided with a refrigerant recovery device according to an eleventh embodiment of the present invention.

FIG. 12 is a diagram showing a refrigeration cycle including a refrigerant recovery device according to a twelfth embodiment of the present invention.

FIG. 13 is a diagram showing a refrigeration cycle provided with a conventional refrigerant recovery device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Decompressor 4 Evaporator 5 Circulation pipe 7 1st manual valve 8 Muffler 9 2nd manual valve 10 Thick pipe with small diameter 11 Thick pipe with thin diameter 12 1st electromagnetic Valve 13 Second electromagnetic valve 14 Check valve 15 Two-way valve

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Koji Wakitani 22-22, Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside (72) Inventor Kei Kei Ichimura 22-22, Nagaikecho, Abeno-ku, Osaka-shi, Osaka (72) Inventor Kazuaki Hiromatsu 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka

Claims (6)

[Claims] In a refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are sequentially connected, a refrigerant recovery container for storing a refrigerant is provided in a pipe between the compressor and the condenser. Valves are provided on both sides of the container, and the refrigerant recovery container including both valves is removed from the refrigeration cycle. 2. A refrigeration cycle in which a compressor, a condenser, a decompressor and an evaporator are connected in sequence, and a refrigerant recovery container for storing refrigerant is provided in the middle of a pipe between the compressor and the condenser. A refrigerant recovery device for a refrigeration cycle, characterized in that a thick pipe with a small diameter is provided in a pipe on both sides of the container, and the refrigerant recovery container is removed from the refrigeration cycle by closing the pipe. 3. A refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are sequentially connected, wherein a refrigerant recovery container for storing refrigerant is provided in a pipe between the compressor and the condenser. A check valve is provided between the inlet side of the refrigerant recovery container and the compressor, and a valve or a thick and thin pipe portion is provided between the outlet side of the refrigerant recovery container and the condenser, and A refrigerant recovery device for a refrigeration cycle, wherein the refrigerant recovery container including a check valve and a valve or a pipe is detached from the refrigeration cycle. 4. A refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are connected in sequence, and an inlet is connected to the compressor in the middle of a pipe between the compressor and the condenser. A two-way valve having an outlet connected to the condenser is provided, and a second outlet of the two-way valve is provided by connecting a refrigerant recovery container via a thick and small-diameter pipe, a check valve or a valve, A refrigerant recovery device for a refrigeration cycle, wherein a refrigerant recovery container including a small-diameter pipe, a check valve or a valve is detached from the refrigeration cycle. 5. The refrigerant recovery device for a refrigeration cycle according to claim 4, wherein the refrigerant recovery container is disposed near an evaporator. 6. A refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are sequentially connected.
And a valve, a small-diameter pipe or a check valve provided on the inlet side of the first condenser near the compressor side, and a valve or a small-diameter pipe provided on the outlet side. Wherein the first condenser including the valve, the small-diameter pipe or the check valve is removed from the refrigeration cycle.