JP3245790B2 - Replacement gas recovery trap device and air conditioner construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an air conditioner for connecting an indoor unit and an outdoor unit with a connecting pipe, and a trapping device for replacing gas used in the method.

[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 port 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 port of the valve has been performed. In contrast to these methods, in Japanese Patent Application Laid-Open No. 3-70953, after replacing the inside of the refrigeration cycle with oxygen, a refrigerant is charged, and oxygen is fixed with an oxygen fixing agent equipped in the refrigeration cycle. A method for manufacturing a refrigeration cycle that does not use a vacuum pump is disclosed.

In Japanese Patent Application Laid-Open No. 7-159004, one of a quasi-compressor and an evaporator or one of a quasi-compressor and an evaporator among expansion mechanisms such as a refrigerating compressor, a condenser, a cabillary tube or an expansion valve, and an evaporator. In a separate type air conditioner in which one of the heat exchanger or evaporator and the expansion mechanism is separated and connected by piping, moisture in the air
It discloses a method of enclosing a substance capable of absorbing two or more of oxygen, nitrogen, carbon dioxide and the like.

[0006] Japanese Patent Application Laid-Open No. 7-269994 discloses a refrigeration cycle in which an oxygen absorbent is provided in a refrigerant circulation system.

Japanese Patent Application Laid-Open No. 9-292168 discloses a method of removing air from a pipe and an indoor unit by arranging an air absorbent, filling carbon dioxide into the pipe and the indoor unit, and then using a carbon dioxide absorbent to fill the pipe and the room. A method of absorbing carbon dioxide in the machine and creating a vacuum is disclosed.

[0008]

The air remaining in the refrigeration cycle must be removed as a non-condensable gas, since the refrigeration capacity is reduced and oxygen and moisture promote deterioration of refrigeration oil and iron inside the refrigeration cycle. There is a need.

Among the methods described in the prior art, the method of evacuating with a vacuum pump is a general method, but a power source is required to operate the vacuum pump at a construction site, and it is difficult to use it on a roof or the like and it is simple. Was needed.

In addition, the method of replacing air with a refrigerant is unavoidable due to the problem of global warming and the like, since the release of CFCs as refrigerant cannot be avoided.

[0011] Further, the method for once trapping the replacement gas after replacing the air in the indoor heat exchanger or the connection pipe with the replacement gas is described below. Has not been proposed.

Accordingly, the present invention provides a method for constructing an air conditioner capable of simply and reliably collecting and trapping the replacement gas after the air in the indoor heat exchanger and the connection pipe is once replaced with the replacement gas. And a replacement gas recovery trap device used for the same.

[0013]

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. A replacement gas recovery trap container for use in the construction of an air conditioner that connects an air conditioner with a replacement pipe, replaces air in the indoor heat exchanger with a replacement gas, and then collects and traps the replacement gas. A gas trapping agent is provided in the container, and a part of the collection trap container is provided with an internal pressure indicating unit that indicates an internal pressure of the collection trap container.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment, an internal pressure indicating portion is provided in a part of a collection trap container, so that a power source is not required and a gas trapping agent inside a collection trap device for a replacement gas is used. However, since the gas is trapped by a physical adsorption reaction or a chemical reaction at a stretch, the construction can be completed in a short time. Also, since the internal pressure change at that time can be monitored by the indicator, it is possible to identify in advance whether the gas trapping agent inside the replacement gas collection trap device has a function to sufficiently collect gas, and at the completion of construction. It can also be confirmed that the gas trapping agent has sufficiently exerted the function of collecting gas. As a result, the reliability at the time of construction is improved.

In the second embodiment, the collection trap container is connected to an air conditioner via a connection jig, and a part of the connection jig is provided with an internal pressure indicating section, so that it is necessary to confirm the completion of construction. It is possible to confirm a negative pressure state. In addition, it becomes possible to reuse the collection trap container semi-permanently without disposable.

In the third embodiment, the gas trapping agent has a function of sufficiently collecting gas in advance by changing the shape of the internal pressure indicating section due to the change of the internal pressure. It is possible to reduce errors in confirming whether the agent has sufficiently functioned to capture gas.

In the fourth embodiment, the internal pressure indicating section is configured to output the internal pressure.
Since the shape changes due to the change, it is possible to easily confirm the change in the internal pressure.

In the fifth embodiment, the internal pressure is 50 to 100 m.
The shape changes irregularly with mHg as a boundary. This is the internal pressure
Is 10 mmHg or less at the beginning and the trapping agent is sufficient
If it functions and becomes negative pressure inside, again 10mmHg or less
50 ~ 100mmH to confirm it
The change in shape at g is effective.

In the sixth embodiment, when the internal pressure indicating portion is recessed,
The amount of dent is 0.5 to 2 mm, and the amount of dent is optimal.
Matching with the degree of internal pressure change due to construction
Becomes possible.

In the seventh embodiment, the internal pressure indicating unit is made of resin.
Due to the laminated structure with metal, shape changes due to pressure change
The metal you want to turn into a very thin metal
By using resin to improve the sensitivity and reliability of the pressure indicator
Can be made.

In an eighth embodiment, the internal pressure indicating section is an internal pressure indicating section .
Due to the color change or color development due to the change in pressure , the gas trapping agent has a function of sufficiently collecting gas in advance, or the gas trapping agent has exhibited the function of sufficiently collecting gas at the completion of construction The error of confirming whether or not can be reduced. The ninth and tenth embodiments are construction methods using the first to eighth embodiments.

[0022]

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

FIGS. 1 and 2 are block diagrams of a refrigerating 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 gas recovery trap device is connected. Is shown. First, an overall configuration of a refrigeration cycle constituting an air conditioner will be described with reference to FIGS. 1 and 2.

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 jig 12, and as shown in FIG. 13 can be connected. The carbon dioxide gas cylinder 11 and the trap device 13 are provided with a jig 1
By connecting to 2 and 14, it is possible to communicate with the connection pipe 10.

Next, an embodiment of a trap device that can be used in the present invention will be described with reference to FIGS.

FIGS. 3 to 5 show a replacement gas trap device according to the first embodiment. FIG. 3 is a schematic configuration diagram of the trapping device for replacing gas according to the embodiment, FIG. 4 is an external view of the trapping device, and FIG. 5 is an enlarged sectional view of the concave portion 17A. In the trap device 13A, a zeolite 15 formed of a spherical body is filled in an aluminum container main body. Zeolite 15 is a zeolite having a diameter of 6 to 8 mesh. Further, inside the trap device 13, a baffle 16 for separating the inlet C and the zeolite 15 is provided,
The zeolite 15 is fixedly held. This baffle 16
Have holes of a size that does not allow zeolite 15 to pass through. In this example, the opening ratio of the baffle was set to 60%, and 100 g of zeolite was filled in total. A concave internal pressure indicating portion 17A is provided near the inlet of the container body. The internal pressure indicating section 17 is made of a three-layer laminated member, and is made of nylon 18, aluminum 19, and nylon 20. The concave shape had a concave amount of 2 mm at an internal pressure of 20 mmHg, and became a flat plate at normal pressure.

FIGS. 6 to 8 show a replacement gas trap device according to a second embodiment. 6 is a schematic configuration diagram of the replacement gas recovery trap device according to the same embodiment, FIG. 7 is an external view of the gas recovery trap device, and FIG. 8 is an enlarged cross-sectional view of the internal pressure indicating unit 17B. The inside of the container of the trap device 13B is the first
The internal pressure indicating portion 17B is provided near the entrance of the container main body and develops color due to material distortion. The internal pressure indicating section 17B is provided on the surface of the PET 21 with the dye layer 2.
2 is printed, and it is further transparent overcoat layer 2
3. The internal pressure indicating section 17B was designed to emit green color with the amount of distortion generated when the internal pressure was 50 mmHg.

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

In the state before construction, the refrigerant gas is filled in the piping on the outdoor unit A side, such as in the compressor 1 and the outdoor 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, the outdoor unit A and the indoor unit B are connected by the connection pipes 9 and 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, a carbon dioxide gas cylinder 11 is attached via a jig 12 to the service port 8 b of the gas side three-way valve 8 of the outdoor unit A. Carbon dioxide gas cylinder 11 in service port 8b
After mounting, the flare portion of the liquid-side two-way valve 7 is slightly loosened. The carbon dioxide gas in the carbon dioxide gas cylinder 11 is introduced into the connection pipe 10 and the indoor unit B by pressing the jig 12 while rotating the carbon dioxide gas cylinder 11. 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 the connection pipe 10 and the inside of the indoor unit B are maintained at a positive pressure (about 0.1 kgf / cm2). Next, the jig 12 is removed from the service port unit 8 together with the carbon dioxide gas cylinder 11. Then, as shown in FIG. 2, the gas recovery trap device 13 is attached to the service part 8b via the jig 14. At this time, the trap device 13
After confirming whether or not the inside is in a negative pressure state with a pressure indicating portion 17 provided near the container body inlet of the container by a color due to a dent or distortion of the shape, the jig 1 is rotated while rotating the trap device 13.
4 by pressing it. By this attachment, the inside of the gas recovery trap device 13 is connected to the connection pipe 10.
The inside of the collection trap device 13 once returns to almost the normal pressure state by communicating with. At this time, the shape of the pressure indicating section 17 changes to a flat plate or a convex shape. Alternatively, the color change or the color that has been developed disappears. When the trap device 13 and the connection pipe 10 communicate with each other, the carbon dioxide gas in the connection pipe 10 is introduced into the trap device 13 from the service port 8b. The introduced carbon dioxide gas is supplied to the trap device 13.
The zeolites are physically adsorbed and collected by the zeolite inside, and the inside becomes a sufficient negative pressure state again. As a result, the pressure instructing section 17 changes its shape to a concave shape again, or causes a change in color or a change in color due to distortion. By confirming these state changes, the internal negative pressure state can be guaranteed. After such a state, the screw portion 7a of the liquid side two-way valve 7 is slightly loosened, and the refrigerant gas on the outdoor unit A side is introduced, so that the inside of the connection pipe 10 and the indoor unit B side pipe are positively pressurized. State (about 0.2kgf / cm2). At this time, the shape of the pressure indicating section 17 changes to a flat plate or a convex shape again. Alternatively, the color change or the color that has been developed disappears. Thereafter, the jig 14 together with the trap device 13 is sent from the service port section 8b.
Is removed, and the screw portion 7a of the liquid-side two-way valve 7 is completely opened again. 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, before the jig 14 is removed together with the trap device 13 from the service port portion 8b, the refrigerant charged in the outdoor unit A is introduced into the connection pipe 10 and the indoor unit B. This is to prevent air from entering the inside from the outside in the last operation despite the fact that a negative pressure state is established. If the jig 14 is designed so that it can be instantly removed from the service port portion 8b, it is not necessary to introduce the refrigerant into the connection pipe 10 and the indoor unit B.

Using the trap device 13A according to the first embodiment shown in FIG. 3 to FIG. 5 and the trap device 13B according to the second embodiment shown in FIG. 6 to FIG. Was. In addition, the internal volume of the indoor unit B side pipe including the indoor heat exchanger 6 and the connection pipes 9 and 10 in the above embodiment was 1.5 liters. As a result, both the indoor trap units 13A and 13B include the indoor unit B including the heat exchanger 6.
The inside of the side pipes and the connection pipes 9 and 10 could reach a sufficient negative pressure atmosphere (10 mmHg or less) in 4 minutes.

In the first embodiment, a three-layer laminated member is used. However, the present invention is not limited to this. Aluminum materials such as aluminum, titanium, copper, magnesium and their alloys,
In addition, stainless steel or the like can be applied. Other resin materials include PET (polyethylene terephthalate), PBT
(Polybutylene terephthalate), PEN (polyethylene naphthalate), PPS (polyphenylene sulfide), PI (polyimide) and the like can be applied. By using a laminated member, the metal sandwiched in
Since it can be applied as a thin body of 0 to 50 microns and reinforced with resin from both sides, the sensitivity and reliability of the pressure indicating section can be improved.

Further, the concave shape of the internal pressure indicating section is set to an internal pressure of 20 mm.
The dent amount was designed to be 2 mm in Hg, but the dent amount effective for the present invention was 0.5 to 2 mm. The dent amount is 0.5m
If it is less than m, it is difficult for the operator to confirm it. If it is more than 2 mm, the amount of change with respect to the internal pressure is too large, and it is difficult to provide a highly reliable internal pressure indicating member. It is the displacement amount that is important for the operator. If the dent amount is 0.5 mm, it is designed to be convex at normal pressure, and if the dent amount is 2 mm, it is designed to be a flat plate at normal pressure. can get.

Also, the concave shape of the internal pressure indicating section is set to an internal pressure of 20 mm.
The dent amount was 2 mm in Hg, and it was designed to be a flat plate at normal pressure. If the design is made such that it reversely changes to a convex shape at the time, the operator can be easily identified. As a boundary value at that time, a shape change at 50 to 100 mmHg was effective in consideration of reliability for construction.

Although the case where the pressure indicating section is provided in the collection trap container has been described, the same effect as the present invention can be obtained by providing the pressure indicating section in the jig by using the jig 12 and the jig 14 in common. Obtainable. In that case, the negative pressure state inside the collection trap container cannot be confirmed by the pressure instruction unit, but the negative pressure state necessary for confirming the completion of the construction can be confirmed. Therefore, the accuracy of construction can be sufficiently guaranteed. Also, if the container itself is provided with a pressure indicator, the container itself will be disposable unless it is reused, but if the pressure indicator is provided on the connection jig, it can be reused semi-permanently without disposable Becomes

Further, after purging the internal air with carbon dioxide gas, the operation was shifted to the next operation while maintaining the connection pipe and the interior of the indoor unit at about 0.1 kgf / cm 2. It only needs to be slightly positive pressure compared to atmospheric pressure,
It is considered that 0.3 kgf / cm2 or less is preferable. Thus, when the inside of the carbon dioxide trap device was communicated with the carbon dioxide trap device, the carbon dioxide trap could be quickly performed by the convection effect of the gas. In addition, as a similar effect, by setting the inside of the carbon dioxide trap device to a sufficient negative pressure of 1 mmHg or less, a gas convection effect from the connection pipe and the inside of the indoor unit to the inside of the carbon dioxide trap device can be obtained. did it.

Further, the internal volume of the indoor unit and the connection pipe is 1.5
The experiment was carried out with 100 g of zeolite in the case of 1 liter. The weight of zeolite expected as an effect of the present invention was 60 g or more per 1 liter of the internal volume of the indoor unit and the connection pipe. As a result, carbon dioxide gas was trapped in 2 to 5 minutes, and a negative pressure state of 10 to 30 mmHg level was achieved. There is no problem because there is too much zeolite, but if too much, the container for storing the trapping material is bulky and not preferable. On the other hand, if it is less than 60 g, the attainment and speed of the negative pressure will be too low to achieve the object of the present invention. Further, if water is adsorbed as a contaminant, trapping of carbon dioxide gas is hindered. Therefore, it is considered that about 60 to 100 g is practically preferable. Further, the case where carbon dioxide gas is used as the replacement gas and zeolite is used as the gas trapping agent has been described, but the scope of the present invention is not limited to this. Other combinations are also applicable as long as the gas trapping agent functions for the replacement gas to achieve a sufficient negative pressure state during collection.

Although the construction method of the outdoor unit having the normal two-way valve and the three-way valve has been described, the invention can be applied to the outdoor unit having the three-way valve and the three-way 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.

Also, a case where a 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 method, moisture present inside can also be eliminated by the operation time of the vacuum pump. However, in the purging method by the replacement gas as in the present invention, it is impossible to eliminate even moisture. Can not. Therefore, an air conditioner in which a dryer is arranged in a refrigeration cycle can easily guarantee long-term reliability.

[0042]

As is evident from the above embodiment, according to the present invention, the gas trapping agent inside the trapping device for collecting the replacement gas does not require a power supply, and the gas is subjected to a physical adsorption reaction or a chemical reaction at a stroke. The construction can be completed in a short time because the trap is performed.

Since the change in the internal pressure at that time can be monitored by the indicator, it is possible to identify in advance whether or not the gas trapping agent inside the trapping device for collecting the replacement gas has a function of sufficiently collecting gas. It can be confirmed whether or not the gas trapping agent has sufficiently functioned to collect gas even at the completion of the construction. As a result, reliability during construction is improved.

[Brief description of the drawings]

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

FIG. 2 is a configuration diagram in which a gas recovery trap device is connected to the air conditioner used in the embodiment of the present invention.

FIG. 3 shows a first example of a gas recovery trap device used in the embodiment.
Sectional configuration diagram according to the embodiment of FIG.

FIG. 4 is an external view of the gas recovery trap device in FIG.

FIG. 5 is an enlarged sectional view of a main part of an internal pressure indicating unit in FIG. 3;

FIG. 6 shows a second example of the gas recovery trap device used in the embodiment.
Sectional configuration diagram according to the embodiment of FIG.

FIG. 7 is an external view of the gas recovery trap device in FIG.

FIG. 8 is an enlarged sectional view of a main part of the internal pressure indicating unit in FIG. 6;

[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 Jig 13 Trap device 14 Treatment Tool 15 Zeolite 16 Baffle 17 Internal pressure indicator 18 Nylon 19 Aluminum 20 Nylon 21 PET 22 Dye layer 23 Overcoat layer

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroyuki Takeuchi 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-company (56) References JP-A-9-292168 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 43/04 F25B 45/00

Claims (9)

(57) [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. The air of the replacement gas is replaced with a replacement gas, and then a replacement gas recovery trap container used for the construction of an air conditioner that collects and traps the replacement gas, wherein a gas trapping agent is provided in the collection trap container. An internal pressure indicating unit for indicating the internal pressure of the collection trap container is provided in a part of the collection trap container, and the internal pressure indicating unit is concave when negative pressure is applied.
A trapping device for collecting replacement gas, wherein the trapping gas has a flat or convex shape when pressed . 2. An indoor unit in which a refrigerant gas is sealed in a compressor or an outdoor heat exchanger and an indoor unit in which the interior of the indoor heat exchanger is opened to the atmosphere are connected by connecting pipes. The air of the replacement gas is replaced with a replacement gas, and thereafter, the replacement gas is provided in a recovery trap container of the replacement gas used in the construction of an air conditioner that collects and traps the replacement gas via a connection jig, and a gas trapping agent is provided. An internal pressure indicating portion indicating the internal pressure of the collection trap container is provided on a part of the connection jig connected to the collection trap container, and the internal pressure indicating portion has a concave shape when negative pressure is applied.
A trapping device for collecting a replacement gas, wherein the trapping gas has a flat or convex shape at normal pressure . 3. Refrigerant gas is introduced into the compressor and the outdoor heat exchanger.
The enclosed outdoor unit and the interior of the indoor heat exchanger were opened to the atmosphere
The indoor unit is connected to the indoor unit by a connection pipe, and the air inside the indoor heat exchanger is
Gas is replaced with a replacement gas, and then the replacement gas is recovered.
Recycling of replacement gas used for trapping air conditioner construction
A collecting trap container, wherein the collecting trap container includes:
A gas trapping agent is provided, and one of the collection trap containers is provided.
The internal pressure indicating section indicating the internal pressure of the collection trap container
The internal pressure indicating unit is provided and the internal pressure is 50 to 100 mmHg.
To become concave, and larger than it is flat or convex
Replacement gas recovery trap characterized by having a shape
apparatus. 4. Refrigerant gas is introduced into the compressor and the outdoor heat exchanger.
The enclosed outdoor unit and the interior of the indoor heat exchanger were opened to the atmosphere
The indoor unit is connected to the indoor unit by a connection pipe, and the air inside the indoor heat exchanger is
Gas with the replacement gas, and then connect the replacement gas
Used for construction of an air conditioner that collects and traps through a jig
Collecting trap in the container a gas trapping agent replacement gas that
And a connection jig connected to the collection trap container.
An internal pressure finger indicating the internal pressure of the collection trap container
Indicating section, wherein the internal pressure indicating section has an internal pressure of 50 to 100 m.
The shape becomes concave at mHg.
Or a replacement gas recovery gas having a convex or convex shape.
Wrap device. 5. The method according to claim 5, wherein the depression amount of the internal pressure indicating section at the time of depression is 0.
The trap for collecting replacement gas according to any one of claims 1 to 4 , wherein the diameter is 5 to 2 mm. 6. The recovery trap device replacement gas claims 1 to 5 any one claim, which is a multi-layer laminate structure of the internal pressure indicating section is a resin and a metal. Wherein said internal pressure indicating section recovery trap device replacement gas color change or color that characterized that according 5 to any one of claims 1 to by a change in internal pressure. 8. An air conditioner configured by connecting an indoor unit and an outdoor unit to each other by a connecting pipe, wherein a replacement gas is introduced into the indoor unit and the connecting pipe during installation work, and After replacing the air in the connection pipe with the replacement gas, the inside of the container of the collection trap device is connected by connecting a collection trap device having a negative pressure inside and a concave internal pressure indicating portion to a part of the air conditioner. Is identified by the internal pressure indicator that changes to a flat plate shape or a convex shape, and then the replacement gas is collected by the replacement gas trapping agent in the collection trap container. The construction method of the air conditioner, wherein the construction is performed by re-identifying the negative pressure state by the internal pressure indication unit. 9. An air conditioner configured by connecting an indoor unit and an outdoor unit to each other by a connection pipe, a replacement gas is introduced into the indoor unit and the connection pipe during installation work, and After replacing the air in the connection pipe with the replacement gas, the collection trap container having a negative pressure inside is connected to a part of the air conditioner through a connection jig, and then the replacement trap container in the collection trap container is connected. The replacement gas is trapped by the gas trapping agent, and the internal pressure indicating portion provided on the connecting jig has a flat or convex shape at normal pressure and a concave shape at negative pressure to indicate that the inside of the container is in a negative pressure state. A method for constructing an air conditioner, characterized by identifying a negative pressure state by performing a change to a negative pressure.