JP2001215072A - Vessel for recovering and trapping carbon dioxide gas and method for reproducing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constitution of a recovering and trapping vessel and a means thereof, which aims at reproduction in a short time in order to cope with a constructing method of an air conditioner, which takes environmental affects into consideration. SOLUTION: The vessel for recovering and trapping carbon dioxide gas used for constructing an air conditioner, is constructed such that an outdoor unit wherein refrigerant gas is sealed in a compressor or an outdoor heat exchanger, is connected, through connection piping, to an indoor unit wherein the interior of an indoor heat exchanger is open in the air, and that the air in the indoor heat exchanger is replaced with carbon dioxide gas and then the carbon dioxide gas is recovered and trapped. Inside the vessel is filled with carbon dioxide gas trapping agent and the surrounding is provided with metal plates capable of induction heating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon dioxide gas recovery trap container used for a method of constructing an air conditioner in which an indoor unit and an outdoor unit are connected by a connecting pipe, and a method of regenerating the same.

[0002]

2. Description of the Related Art A refrigeration cycle used in an air conditioner is configured by connecting a refrigerant flow control unit having an expansion mechanism such as a compressor, a heat exchanger, a cab tube or an expansion valve by a pipe such as a copper pipe. And a fluid filled in the refrigeration cycle, such as a refrigerant and a lubricating oil composition. In a separate type air conditioner, an outdoor unit having a compressor and a heat exchanger and an indoor unit having a heat exchanger installed at a location where refrigeration and air conditioning are performed are connected by a connection pipe such as a copper pipe. Is done. In such a refrigeration cycle, the outdoor unit is filled with a part or all of the refrigerant and the lubricating oil composition in advance, the valve of the outdoor unit is closed, and the refrigeration is connected to the indoor unit using a connection pipe during construction. It is common to form a cycle.

[0003] By simply connecting the pipes in this manner, air remains in the indoor unit and the connection pipe. In order to remove this air, a vacuum pump is connected to the refrigerant charge boat provided on the valve of the outdoor unit, and after removing the air, the valve is opened and the indoor unit and the outdoor unit are connected to form a refrigeration system. Had been taken.

A simple construction method is to open a valve of the outdoor unit at the time of construction to allow the refrigerant in the outdoor unit to flow to the connection pipe and the indoor unit, and to provide a refrigerant charge port provided in a valve of another outdoor unit. Alternatively, the operation of replacing the gas in the indoor unit and the connection pipe by discharging the refrigerant containing air from the gap formed by relaxing the connection of the connection boat with the valve has been performed.

[0005] In contrast to these methods, Japanese Patent Application Laid-Open No. 9-292168
The publication discloses a method in which carbon dioxide is sealed in a connection pipe and an indoor unit, and then carbon dioxide in the pipe and the indoor unit is absorbed by a carbon dioxide absorbent to sufficiently reduce the pressure.

[0006]

The carbon dioxide absorbent comprises:
By using the zeolite, it is possible to effectively absorb carbon dioxide in the piping and the indoor unit and to sufficiently reduce the pressure.
Also, if one air conditioner was installed in one zeolite-filled container, it could be regenerated by desorbing it for about 30 minutes using a vacuum pump. However, one zeolite-filled container needs to be filled with a considerably large amount of zeolite in order to support installation of several air conditioners. For example, to install 10 air conditioners, about 1 kg of zeolite is required. It takes a considerable amount of time, for example, 5 hours or more, to regenerate such a zeolite-filled container by the carbon dioxide desorption mechanism.

[0007] Therefore, the present invention is used in a method for constructing an air conditioner capable of easily recovering and trapping the replacement gas after once replacing the air in the indoor heat exchanger and the connection pipe with the replacement gas. The purpose of the present invention is to provide a configuration of a collection trap container intended to regenerate the collection trap container to be completed in a short time and a means therefor.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an outdoor unit in which a refrigerant gas is sealed in a compressor or an outdoor heat exchanger, and an indoor unit in which an indoor heat exchanger is opened to the atmosphere. Gas trap for use in the construction of an air conditioner that connects the air conditioner with a connecting pipe, replaces air in the indoor heat exchanger with carbon dioxide gas, and then collects and traps the carbon dioxide gas through a connection jig. It is a container, wherein the container is filled with a carbon dioxide gas trapping agent, and a metal plate capable of induction heating is provided around the container.

After adsorbing the carbon dioxide gas, the container body is placed in the induction heating device and the carbon dioxide gas is desorbed from the carbon dioxide gas trapping agent by a vacuum pump while maintaining a predetermined temperature. It is possible to significantly reduce the time and efficiently operate the trapping container for collecting carbon dioxide gas.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 for solving the above-mentioned problems is directed to an outdoor unit in which a refrigerant gas is sealed in a compressor or an outdoor heat exchanger, and an indoor heat exchanger in an atmosphere. An open indoor unit is connected by a connection pipe, the air in the indoor heat exchanger is replaced with carbon dioxide, and then the carbon dioxide is used for construction of an air conditioner that collects and traps the carbon dioxide through a connection jig. Wherein the inside of the container is filled with a carbon dioxide trapping agent, and a metal plate capable of induction heating is provided around the container.

According to a second aspect of the present invention, there is provided a carbon dioxide gas recovery trap container in which a container is filled with a carbon dioxide gas trapping agent, and the container itself is made of a metal capable of induction heating.

According to a third aspect of the present invention, there is provided a carbon dioxide gas collecting and trapping container which is capable of performing induction heating on the container itself and is composed of clad metal having excellent heat conductivity.

According to a fourth aspect of the present invention, an outdoor unit in which a refrigerant gas is sealed in a compressor or an outdoor heat exchanger is connected to an indoor unit in which the interior of the indoor heat exchanger is opened to the atmosphere by a connecting pipe. A carbon dioxide gas recovery trap container for replacing the air in the indoor heat exchanger with carbon dioxide gas, and then using the air conditioner to collect and trap the carbon dioxide gas through a connection jig. A carbon dioxide gas recovery trap container filled with a granular carbon dioxide gas trapping agent and having a continuous gas passage disposed around the carbon dioxide gas trapping agent.

According to a fifth aspect of the present invention, there is provided a carbon dioxide gas in which a continuous gas passage is provided by using a mesh or a punched metal as a pipe and a sheet inside a container, and a granular carbon dioxide trapping agent is filled in a multi-stage layer. Collection trap container.

According to a sixth aspect of the present invention, the container body after adsorbing the carbon dioxide gas is placed on an induction heater, and the carbon dioxide gas is desorbed from the carbon dioxide trapping agent by a vacuum pump while being heated to a predetermined temperature. This is a method for regenerating a trap container.

[0016] The invention described in claim 7 is a carbon dioxide recovery trap in which the container body after carbon dioxide adsorption is immersed in oil and heated to a predetermined temperature while desorbing carbon dioxide from the carbon dioxide trapping agent by a vacuum pump. This is a method of recycling a container.

[0017] In the invention described in claim 8, the predetermined temperature is 10
This is a method for regenerating a carbon dioxide gas recovery trap container at 0 to 150 ° C.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show the configuration of a refrigeration cycle of an air conditioner used in the embodiment. FIG. 1 shows a state in which a carbon dioxide gas cylinder is connected, and FIG. 2 shows a state in which a carbon dioxide gas recovery trap container is connected. FIG.

First, an overall configuration of a refrigeration cycle constituting an air conditioner will be described with reference to FIGS.

The refrigerating cycle includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an expansion device 4, a dryer 5, and an indoor heat exchanger 6. The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the expansion device 4, and the dryer 5
, And the indoor heat exchanger 6 is disposed in the outdoor unit B.

The outdoor unit A is provided with a liquid side two-way valve 7 and a gas side three-way valve 8. The connection pipes 9 and 10 for connecting the outdoor unit A and the indoor unit B are respectively a liquid side two-way valve 7 and a gas side 3
It is connected using a direction valve 8. The liquid side two-way valve 7 has a screw portion 7a, and by opening the screw portion 7a, the pipe on the outdoor unit A side and the connection pipe 7 are communicated. Further, the gas side three-way valve has a screw portion 8a and a service port portion 8b. By opening the screw portion 8a, the pipe on the outdoor unit A side and the connection pipe 10 are communicated.

As shown in FIG. 1, the service port portion 8b can be connected to a carbon dioxide gas cylinder 11 using a connection fitting A12, and as shown in FIG.
14, a carbon dioxide gas collection trap container 13.
Can be connected. The carbon dioxide gas cylinder 11 and the collection trap container 13 for the carbon dioxide gas cylinder
12. By connecting to the connection fitting B14, it is possible to communicate with the connection pipe 10. The service port portion 8b has a valve core disposed therein, and is configured to be opened by pressing the valve core from the outside to the inside.
The valve core is configured to be closed when pressed against the seat by the elastic body.

(Embodiment 1) FIG. 3 is a schematic structural view of a carbon dioxide gas recovery trap container according to a first embodiment.

The collection trap container 13 has a copper container body inside which a cylindrical iron plate (thickness 0.3 mm) 15 is disposed along the inner peripheral surface and is filled with zeolite 16 formed of a spherical body. The zeolite 16 is a zeolite having a diameter of 6 to 8 mesh. Further, a baffle 17 for separating the inlet 13a from the zeolite 16 is provided inside the collection trap container 13, and the zeolite 16 is fixedly held. The baffle 17 has a hole having a size that does not allow the zeolite 16 to pass through. In this embodiment, the opening ratio of the baffle is set to 80%, and the total amount of zeolite is 1 kg.
Filled. A baffle 17 is located near the entrance 13a of the container body.
Is provided with a clearance space 13b. There is also a clearance space between communicating zeolites constituted by spherical zeolites 16. 100c in total
c. The container body with the inlet open was moved into an atmosphere furnace, and gradually heated and held for 2 hours while reducing the pressure to 350 ° C. by a vacuum pump. Then 200
After cooling to ° C., the atmosphere was replaced with carbon dioxide gas, and the base in which the valve core was inserted was sealed by coating with an epoxy resin. As a result, at 25 ° C. and 1 atm, the internal pressure of the trap container could be reduced to about 5 mmHg.

Next, a method of installing the above air conditioner will be described.

In the state before the construction, the refrigerant gas is filled in the piping on the side of the outdoor unit A such as the compressor 1 and the indoor heat exchanger 3. At this time, the outdoor unit A is filled with a purging refrigerant gas in addition to the operating refrigerant gas necessary for operation. On the other hand, the pipes on the indoor unit B side, such as the indoor heat exchanger 6, and the connection pipes 9, 10 are not particularly sealed, but are open to the atmosphere.

First, a connection pipe 9 connects the outdoor unit A and the indoor unit B,
Connect at 10. At this time, the screw portion 7a of the liquid-side two-way valve and the screw portion 8a of the gas-side three-way valve 8 are closed. Then, the carbon dioxide gas cylinder 11 is attached to the service port portion 8b of the gas side three-way valve 8 of the outdoor unit A via the connection fitting A12.

The carbon dioxide gas cylinder 11 is connected to the service port 8b.
After mounting, the flare portion of the liquid-side two-way valve 7 is slightly loosened. Then, the carbon dioxide gas inside the carbon dioxide gas cylinder 11 is introduced into the connection pipe 10 and the indoor unit B by pressing the carbon dioxide gas cylinder 11 against the connection fitting A12 while rotating. The air inside the connection pipe 10 and the inside of the indoor unit B is released to the atmosphere together with the introduced carbon dioxide from the loosened portion of the flare portion of the liquid side two-way valve 7.

At this time, the flare portion of the liquid-side two-way valve 7 is firmly closed while keeping the connection pipe 10 and the interior of the indoor unit B at a slight positive pressure (about 0.1 kgf / cm 2).

Next, the connection fitting A12 is removed from the service port section 8 together with the carbon dioxide gas cylinder 11. And
As shown in FIG. 2, the connection fitting B is attached to the service part 8b.
A carbon dioxide gas recovery trap container 13 is attached via 14.

At this time, the internal space volume of the connection fitting B 14 is 3 cc, and is open to the atmosphere until it is communicated with the zeolite portion of the collection trap container 13. This is performed by pressing the connection trap B 14 while rotating the collection trap container 13.

By this attachment, the zeolite portion of the collection trap container 13 and the connection pipe 10 communicate with each other, so that the carbon dioxide in the connection pipe 10 is released from the service port 8b.
Through the internal passage of the connection fitting B 14 into the collection trap container 13. That is, the collection trap container 1
The inside of the connection trap 3 tries to return to almost normal pressure due to the communication, and the air occupying the internal space of the connection fitting 14 at that time is a suction effect due to the inside of the collection trap container 13 being in a sufficiently negative pressure state. The mixture is introduced into the collection trap container 13 while being mixed and diffused together with the carbon dioxide gas in the connection pipe 10 located through the air in the connection fitting B 14. Therefore, the total space volume of the clearance provided in the trap container in a sufficiently negative pressure state triggers the suction effect. The carbon dioxide gas introduced into the container is physically adsorbed and collected by contact with the zeolite, and finally the connection pipes 9, 10
And the inside of the indoor unit B reaches a sufficient negative pressure state.

After such a state, the liquid side two-way valve 7
The connection pipes 9 and 10 and the interior of the indoor unit B side are brought into a positive pressure state (about 0.2 kgf / cm 2) by loosening the screw portion 7a slightly and introducing the refrigerant gas on the outdoor unit A side. Thereafter, the connection jig B14 is removed together with the collection trap container 13 from the service port portion 8b, and the liquid side two-way valve 7 is
The screw portion 7a is completely opened. Finally, by completely opening the screw portion 8a of the gas side three-way valve 8, the installation work related to the construction of the air conditioner is completed.

In the above installation work process, the connection fitting A12 connected to the carbon dioxide gas cylinder side and the connection fitting B14 connected to the zeolite filling section side are shown as separate connection fittings. This is because the introduction of carbon dioxide gas is performed while adjusting the internal pressure to some extent, so that it is preferable to use a communication port that is smaller than the communication port required for the collection trap operation. However, in order to reduce the number of necessary parts, it is possible to share the work by carefully performing work operations. Before removing the connection fitting B14 together with the collection trap container 13 from the service port portion 8b, the refrigerant filled in the outdoor unit A was introduced into the connection pipes 9, 10 and the indoor unit B. This is to prevent air from entering the inside of the connection pipe 10 from the outside in the last jig removal work despite being in a state. It is not necessary to introduce the refrigerant into the connection pipes 9 and 10 and the indoor unit B as long as the connection fitting B 14 is designed so that it can be instantaneously removed from the service port portion 8b.

The above construction was performed in a working atmosphere of 30 ° C. using the collection trap container 13 according to the first embodiment shown in FIG. In the above embodiment, the internal volumes of the indoor unit B side pipes including the indoor heat exchanger 6 and the connection pipes 9, 10 are 1.5 times.
Liters.

As a result, the inside of the indoor unit B side pipe including the heat exchanger 6 and the inside of the connection pipes 9 and 10 could reach a sufficient negative pressure atmosphere in 3 minutes. Further similar internal volume 1.
For the indoor unit having 5 liters and the connecting pipe, the construction work was performed up to 10 times in the same collection trap container with a 10-minute rest period interposed therebetween, and the carbon dioxide gas was recovered.

The collection trap container used for the installation work of the air conditioner can regenerate the adsorption characteristics of zeolite by reducing the pressure from the valve core with a vacuum pump, and can be reused any number of times. Therefore, the operation of regenerating the collection trap container will now be described.

FIG. 4 shows a schematic configuration diagram of the recovery of the recovery trap container. The collection trap container 13 is connected to a vacuum pump 19 via a pressure-resistant hose 18. Further, the collection trap container 13 is disposed in the induction heating device 20. The main body of the induction heating device 20 includes a storage portion 21 for storing the inside of the collection trap container 13, and a temperature detecting means 22 for detecting the temperature of the collection trap container 13 on a bottom portion, and a heating induction coil 23.
Is provided with a high frequency generating circuit 24 for supplying a high frequency current having a frequency of about 20 to 30 kHz. In FIG. 5, reference numeral 25 denotes an AC power supply, which is rectified by a rectifier 26. Further, a filter circuit of a capacitor 27 and a tuke coil 28 is connected via a rectifier 26. A high frequency generator 24 is connected to the load side of the filter circuit. The high frequency generating circuit 24 includes a smoothing capacitor 29 and a heating induction coil 2.
3 and a switching element 31 and a diode 32 connected in anti-parallel. 33 is a control circuit for performing ON-OFF control of the switching element 31.

An eddy current flows through the cylindrical iron plate 15 disposed in the collection trap container 13 due to an alternating magnetic field generated by a current flowing through the induction coil 21, and the eddy current is induced and heated by Joule heat.

Collection trap container 1 used 10 times continuously
Sample No. 3 was heated while being controlled at 120 ° C. by an induction heating device 20, and was regenerated in about 70 minutes by being evacuated by a vacuum pump 19.

(Embodiment 2) FIG. 6 is a schematic structural view of a carbon dioxide gas recovery trap container according to a second embodiment.

The recovery trap container 34 has a SUS430 container body filled with zeolite 35 formed of a spherical body. Zeolite 35 is a zeolite having a diameter of 6 to 8 mesh. Further, a baffle 36 for separating the inlet 34a from the zeolite 35 is provided inside the collection trap container 34, and the zeolite 35 is fixedly held. The baffle 36 has a hole having a size that does not allow the zeolite 35 to pass through. In this embodiment, the aperture ratio of the baffle is 80
%, And 1 kg of zeolite was charged in total. A clearance space 34b is provided between the container body and the baffle 36 near the inlet 34a. In addition, there is a clearance space between communicating zeolites constituted by spherical zeolites 35. The total was designed as 100 cc. Move the container body with the inlet open to the atmosphere furnace,
While gradually reducing the pressure to 350 ° C. with a vacuum pump, the mixture was gradually heated and held for 2 hours. Then, after cooling to 200 ° C., the atmosphere was replaced with carbon dioxide gas, and the base into which the valve core was inserted was sealed by coating with an epoxy resin. As a result, at 25 ° C. and 1 atm, the internal pressure of the trap container could be reduced to about 5 mmHg.

Using the collection trap container 34 according to the second embodiment shown in FIG. 6, the air conditioner was installed in a working atmosphere of 30 ° C. In addition, the indoor heat exchanger 6 in the above embodiment is used.
The internal volume of the indoor unit B side piping and the connection pipings 9 and 10 including the above was 1.5 liters.

As a result, the inside of the indoor unit B side pipe including the heat exchanger 6 and the inside of the connection pipes 9 and 10 could reach a sufficient negative pressure atmosphere in 3 minutes. Further similar internal volume 1.
For the indoor unit having 5 liters and the connecting pipe, the construction work was performed up to 10 times in the same collection trap container with a 10-minute rest period interposed therebetween, and the carbon dioxide gas was recovered.

The collection trap container used in the installation work of the air conditioner can regenerate the adsorption characteristics of zeolite by reducing the pressure from the valve core with a vacuum pump, and can be reused any number of times. Therefore, next, the operation of regenerating the collection trap container was carried out in the same configuration as in Example 1.

As a result, the recovery trap container 34 used continuously 10 times was regenerated in about 60 minutes by being evacuated by a vacuum pump while being heated at 120 ° C. by the induction heating device 20.

(Embodiment 3) FIG. 7 is a schematic structural view of a carbon dioxide gas recovery trap container according to a third embodiment.

The recovery trap container 37 has a spherical body filled with zeolite 38 inside a SUS430 + aluminum clad metal container body. The zeolite 38 is a zeolite having a diameter of 6 to 8 mesh. Further, a baffle 39 for separating the inlet 37a and the zeolite 38 is provided inside the collection trap container 37, and the zeolite 38 is fixedly held. The baffle 39 has a hole whose size does not allow the zeolite 38 to pass through. In this example, the opening ratio of the baffle was set to 80%, and zeolite was filled in a total amount of 1 kg. A clearance space 37b is provided between the baffle 39 and the inlet 37a of the container body. There is also a clearance space between communicating zeolites composed of spherical zeolites 38. 1 of them
Designed as 00cc. The container body with the inlet open was moved into an atmosphere furnace, and gradually heated and held for 2 hours while reducing the pressure to 350 ° C. by a vacuum pump. Then 2
After cooling to 00 ° C., the atmosphere was replaced with carbon dioxide gas, and the die into which the valve core was inserted was sealed by coating with an epoxy resin. As a result, at 25 ° C. and 1 atm, the internal pressure of the trap container could be reduced to about 5 mmHg.

Using the collection trap container 37 according to the third embodiment shown in FIG. 7, the air conditioner was installed in a working atmosphere of 30 ° C. In addition, the indoor heat exchanger 6 in the above embodiment is used.
The internal volume of the indoor unit B side piping and the connection pipings 9 and 10 including the above was 1.5 liters.

As a result, the inside of the indoor unit B side pipe including the heat exchanger 6 and the inside of the connection pipes 9 and 10 could reach a sufficient negative pressure atmosphere in 3 minutes. Further similar internal volume 1.
For the indoor unit having 5 liters and the connection pipe, the construction work was performed up to 10 times in the same collection trap container while a break of 10 minutes was interposed, and the carbon dioxide gas was recovered.

The collection trap container used in the installation work of the air conditioner can regenerate the adsorption characteristics of zeolite by reducing the pressure from the valve core with a vacuum pump, and can be reused any number of times. Therefore, next, the operation of regenerating the collection trap container was carried out in the same configuration as in Example 1.

As a result, the recovery trap container 37 used continuously 10 times was regenerated in about 50 minutes by being evacuated by the vacuum pump while being heated at 120 ° C. by the induction heating device.

(Embodiment 4) FIG. 8 is a schematic structural view of a carbon dioxide gas recovery trap container according to a first embodiment.

The collection trap container 40 has a SUS304 mesh pipe 41 arranged at the center and a SUS304 mesh sheet 42 arranged in a stepped layer inside a SUS430 container body.
The zeolite 43 composed of a spherical body is filled in a three-layer structure. A gas passage 44 is formed inside the SUS304 mesh pipe 41 and between the SUS304 mesh sheets 42 sandwiched therebetween.
The zeolite 43 is a zeolite having a diameter of 6 to 8 mesh, and a SUS304 mesh sheet 42 for separating the entrance 40a and the zeolite 43 is also provided inside the collection trap container 40, and the zeolite 43 is fixed and held. SUS3
04 mesh pipe 41 and SUS304 mesh sheet 42
Have holes of a size that does not allow the zeolite 43 to pass through. In the present embodiment, the opening ratio of the SUS304 mesh sheet 42 was set to 80%, and 1 kg of zeolite was filled in total. A clearance space 40b is also provided between the SUS304 mesh sheet 42 and the inlet 40a of the container body. In addition, there is a clearance space between communicating zeolites composed of spherical zeolites 43. Three of them
Designed as 00cc. The container body with the inlet open was moved into an atmosphere furnace, and gradually heated and held for 2 hours while reducing the pressure to 350 ° C. by a vacuum pump. Then 2
After cooling to 00 ° C., the atmosphere was replaced with carbon dioxide gas, and the die into which the valve core was inserted was sealed by coating with an epoxy resin. As a result, at 25 ° C. and 1 atm, the internal pressure of the trap container could be reduced to about 5 mmHg.

Using the recovery trap container 40 according to the fourth embodiment shown in FIG. 8, the air conditioner was installed in a working atmosphere of 30 ° C. In addition, the indoor heat exchanger 6 in the above embodiment is used.
The internal volume of the indoor unit B side piping and the connection pipings 9 and 10 including the above was 1.5 liters.

As a result, the inside of the indoor unit B side pipe including the heat exchanger 6 and the inside of the connection pipes 9 and 10 could reach a sufficient negative pressure atmosphere in 3 minutes. Further similar internal volume 1.
For the indoor unit having 5 liters and the connection pipe, the construction work was performed up to 10 times in the same collection trap container while a break of 10 minutes was interposed, and the carbon dioxide gas was recovered.

The collection trap container used in the installation work of the air conditioner is configured so that the adsorption characteristics of zeolite can be regenerated by reducing the pressure from the valve core with a vacuum pump, and can be reused any number of times. Therefore, next, the operation of regenerating the collection trap container was carried out in the same configuration as in Example 1.

As a result, the recovery trap container 40 used continuously 10 times was regenerated in about 30 minutes by being evacuated by the vacuum pump while being heated at 120 ° C. by the induction heating device.

(Embodiment 5) FIG. 9 is a schematic configuration diagram of a carbon dioxide gas recovery trap container according to a fifth embodiment.

The collection trap container 45 has a SUS304 mesh sheet 46 spirally arranged inside a SUS430 container body, and is filled with zeolite 47 formed of a spherical body in a stepped structure. A continuous gas passage 48 is formed between the SUS 304 mesh sheets 46. The zeolite 47 is a zeolite having a diameter of 6 to 8 mesh. Inside the collection trap container 45, SUS3 for separating the entrance 45a and the zeolite 47 is provided.
A 04 mesh sheet 49 is also provided, and the zeolite 47 is fixedly held. SUS304 mesh sheet 46, 49
Have holes of a size that does not allow zeolite 47 to pass through. In this embodiment, the opening ratio of the SUS304 mesh sheet is 8
It was set to 0% and 1 kg of zeolite was charged in total. SUS304 mesh sheet 49 near the entrance 45a of the container body
Is provided with a clearance space 45b. There is also a clearance space between communicating zeolites constituted by spherical zeolites 47. 300c in total
c. The container body with the inlet open was moved into an atmosphere furnace, and gradually heated and held for 2 hours while reducing the pressure to 350 ° C. by a vacuum pump. Then 200
After cooling to ° C., the atmosphere was replaced with carbon dioxide gas, and the base in which the valve core was inserted was sealed by coating with an epoxy resin. As a result, at 25 ° C. and 1 atm, the internal pressure of the trap container could be reduced to about 5 mmHg.

Using the recovery trap container 45 according to the fifth embodiment shown in FIG. 9, the air conditioner was installed in a working atmosphere of 30 ° C. In addition, the indoor heat exchanger 6 in the above embodiment is used.
The internal volume of the indoor unit B side piping and the connection pipings 9 and 10 including the above was 1.5 liters.

As a result, the inside of the indoor unit B side pipe including the heat exchanger 6 and the inside of the connection pipes 9 and 10 could reach a sufficient negative pressure atmosphere in 3 minutes. Further similar internal volume 1.
For the indoor unit having 5 liters and the connection pipe, the construction work was performed up to 10 times in the same collection trap container while a break of 10 minutes was interposed, and the carbon dioxide gas was recovered.

The collection trap container used in the installation work of the air conditioner can regenerate the adsorption characteristics of zeolite by reducing the pressure from the valve core with a vacuum pump, and can be reused any number of times. Therefore, next, the operation of regenerating the collection trap container was carried out in the same configuration as in Example 1.

As a result, the recovery trap container 45 used continuously 10 times was regenerated in about 30 minutes by being evacuated by the vacuum pump while being heated at 120 ° C. by the induction heating device.

(Embodiment 6) Using the collection trap container 34 according to the second embodiment shown in FIG.
The test was performed in a working atmosphere of 0 ° C. In addition, the indoor unit B side piping and the connection piping 9 including the indoor heat exchanger 6 in the above embodiment,
The internal volume of 10 was 1.5 liters.

As a result, the inside of the indoor unit B side pipe including the heat exchanger 6 and the inside of the connection pipes 9 and 10 could reach a sufficient negative pressure atmosphere in 3 minutes. Further similar internal volume 1.
For the indoor unit having 5 liters and the connection pipe, the construction work was performed up to 10 times in the same collection trap container while a break of 10 minutes was interposed, and the carbon dioxide gas was recovered.

The collection trap container used for the installation work of the air conditioner can regenerate the adsorption characteristic of zeolite by reducing the pressure from the valve core with a vacuum pump, and can be reused any number of times. Therefore, the operation of regenerating the collection trap container will now be described.

FIG. 10 shows a schematic configuration diagram of the recovery trap container regeneration. The collection trap container 34 is connected to a vacuum pump 51 via a pressure-resistant hose 50. The collection trap container 34 is disposed in the oil bath device 52. A predetermined oil 53 is filled in the inside of the tank of the oil bath device 52 so that almost the entire container is immersed in a state where the collection trap container 34 is arranged. Further, inside the main body of the oil bath device 52, a sheathed heater 54 for heating, a temperature detecting means 55 for detecting the temperature, and a control circuit 56 are provided.

The collection trap container 34 has a sheath heater 54.
The temperature is controlled by a temperature detecting means 55 and a control circuit 56 to a certain range.

As a result, the recovery trap container 34 used continuously 10 times was regenerated in about 50 minutes by being evacuated by a vacuum pump while being heated at 120 ° C. by the oil bath device 52.

In the embodiment, after purging the internal air with carbon dioxide, the next operation is performed with the connection pipe and the inside of the indoor unit kept at a positive pressure. However, the operation can be returned to normal pressure. At this time, the level of the required positive pressure may be slightly higher than the atmospheric pressure, and it is considered that the pressure is preferably 0.3 kgf / cm 2 or less. Thereby, when the inside of the container is communicated with the carbon dioxide trap side container, the carbon dioxide trap can be quickly performed by the positive convection effect of the gas. Further, as a similar effect, by setting the inside of the carbon dioxide trap container to a sufficiently negative pressure state, a gas convection effect from the connection pipe and the inside of the indoor unit to the inside of the carbon dioxide trap container can be obtained. To this end, by optimizing the clearance space volume in the container and the internal space volume of the connection jig, the replacement gas can be sucked to the recovery trap container side to some extent.

In the embodiment, the construction method of the outdoor unit having the usual two-way valve and three-way valve has been described.
It can also be applied to an outdoor unit equipped with a side valve. In the embodiment, two types of jigs are used for the two-way valve. However, in the present invention, the jig is formed in a T-branch shape to separate the carbon dioxide supply part and the carbon dioxide adsorption part from one connection part. It is also possible to do it.

In the embodiment, the case where the dryer is arranged in the outdoor unit main body is shown. In the air purging of the indoor unit and the connection pipe by the vacuum pump system, moisture present inside can be removed by operating the vacuum pump, but
In the purging method using the replacement gas as in the present invention, it is not possible to eliminate even moisture. Therefore, an air conditioner in which a dryer is arranged in a refrigeration cycle can easily guarantee long-term reliability.

[0075]

As is apparent from the above embodiment, according to the first aspect of the present invention, after adsorbing carbon dioxide, the container body is placed in the induction heating device and the vacuum pump is used while maintaining the predetermined temperature. By desorbing carbon dioxide from the carbon dioxide trapping agent, the time required for regeneration was greatly reduced, and the trap for carbon dioxide gas could be operated efficiently.

According to the second aspect of the present invention, the container itself is made of a metal capable of induction heating, so that the container is uniformly heated at the time of induction heating, thereby further reducing the time required for regeneration. The required manufacturing method is also simplified.

According to the third aspect of the present invention, the container itself is made of a metal which can be induction-heated, and is made of a metal having excellent thermal conductivity and a clad metallized metal to form an entire container from the heated metal. The heat transfer was improved, and the time required for regeneration was further shortened. The required manufacturing method is also simplified.

According to the fourth aspect of the present invention, the gas passage area required for the desorption reaction of carbon dioxide can be increased, so that the time required for regeneration can be greatly reduced, and the trapping vessel for recovering carbon dioxide can be efficiently provided. It was able to operate.

According to the fifth aspect of the present invention, since the continuous gas passage can be arranged in various designs by making the mesh or the punched metal into a pipe shape and a sheet shape, the regeneration time can be effectively shortened. It was planned.

According to the sixth aspect of the present invention, if the container is heated by the induction heating method, a large drying device is not required, and the container can be replaced by a household device which is becoming popular in rice cookers and cookers. Aggressive regeneration was achieved.

According to the seventh aspect of the present invention, by using salad oil or the like as the oil, the regeneration of the container can be positively shortened by using a general cooking utensil.

According to the eighth aspect of the present invention, by setting the regeneration temperature to 100 to 150 ° C., the carbon dioxide desorption reaction from the zeolite proceeds rapidly, and the regeneration of the container is positively shortened. Was completed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a refrigeration cycle of an air conditioner used in an embodiment of the present invention, in which a carbon dioxide gas cylinder is connected.

FIG. 2 is a configuration diagram showing a refrigeration cycle of an air conditioner used in an embodiment of the present invention, in which a collection trap container is connected.

FIG. 3 is a cross-sectional configuration diagram of a collection trap container used in the first embodiment according to the first embodiment.

FIG. 4 is a schematic configuration diagram of a recovery trap container according to the first embodiment of the recovery trap container used in the embodiment.

FIG. 5 is an electric circuit diagram of the induction heating device according to the embodiment of the present invention.

FIG. 6 is a sectional configuration diagram of a collection trap container used in the second embodiment according to a second embodiment.

FIG. 7 is a sectional configuration diagram of a collection trap container according to a third embodiment of the present invention.

FIG. 8 is a sectional view of a collection trap container according to a fourth embodiment of the present invention.

FIG. 9 is a sectional view of a collection trap container used in the fifth embodiment according to a fifth embodiment.

FIG. 10 is a schematic configuration diagram of recovery trap container recovery according to a second embodiment of the recovery trap container used in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Throttle device 5 Dryer 6 Indoor heat exchanger 7 Liquid-side two-way valve 8 Gas-side three-way valve 9 Connection piping 10 Connection piping 11 Carbon dioxide gas cylinder 12 Connection fitting A 13 Collection trap container Reference Signs List 14 Connection jig B 15 Cylindrical iron plate 16 Zeolite 17 Baffle 18 Pressure-resistant hose 19 Vacuum pump 20 Induction heating device 21 Storage unit 22 Temperature detection means 23 Induction coil 24 High frequency generation circuit 25 AC power supply 26 Rectifier 27 Capacitor 28 Chuk coil 29 Smoothing capacitor Reference Signs List 30 resonance capacitor 31 switching element 32 diode 33 control circuit 34 collection container 35 zeolite 36 baffle 37 collection trap container 38 zeolite 39 baffle 40 collection trap container 41 SUS304 mesh pipe 42 SUS304 mesh sheet 43 j Olite 44 Gas passage 45 Recovery trap container 46 SUS304 mesh sheet 47 Zeolite 48 Gas passage 49 SUS304 mesh sheet 50 Pressure-resistant hose 51 Vacuum pump 52 Oil bath device 53 Oil 54 Seeds heater 55 Temperature detecting means 56 Control circuit

Claims (8)

[Claims] An indoor unit in which a refrigerant gas is sealed in a compressor or an outdoor heat exchanger and an indoor unit in which an indoor heat exchanger is opened to the atmosphere are connected by a connection pipe. A carbon dioxide gas trapping agent used for constructing an air conditioner that replaces the air with carbon dioxide gas and then collects and traps the carbon dioxide gas through a connection jig, wherein the container is filled with a carbon dioxide gas trapping agent. And a metal plate capable of being induction-heated. 2. The carbon dioxide gas trapping container according to claim 1, wherein the container is filled with a carbon dioxide gas trapping agent, and the container is made of a metal capable of induction heating. 3. The carbon dioxide recovery trap container according to claim 2, wherein the container is made of a clad metal that can be induction-heated and has excellent thermal conductivity. 4. An indoor unit having a refrigerant gas sealed in a compressor or an outdoor heat exchanger and an indoor unit having an indoor heat exchanger opened to the atmosphere are connected by connecting pipes. A carbon dioxide gas trapping agent used in an air conditioner that replaces the air with carbon dioxide gas and then collects and traps the carbon dioxide gas through a connection jig. Characterized in that a continuous gas passage is provided around the carbon dioxide trapping agent. 5. A continuous gas passage is formed by forming a mesh or a punched metal into a pipe and a sheet inside the container, and a granular carbon dioxide trapping agent is filled in a multi-layer. A trap for collecting carbon dioxide as described in the above. 6. A carbon dioxide gas recovery trap, wherein the container body after adsorbing carbon dioxide gas is placed on an induction heater, and the carbon dioxide gas is desorbed from the carbon dioxide gas trapping agent by a vacuum pump while heating to a predetermined temperature. Container recycling method. 7. A carbon dioxide gas recovery trap container characterized in that the container body after adsorption of carbon dioxide gas is immersed in oil and heated to a predetermined temperature while desorbing carbon dioxide from the carbon dioxide gas trapping agent by a vacuum pump. How to play. 8. The method according to claim 6, wherein the predetermined temperature is 100 to 150 ° C.