KR100484871B1 - A connecter for refrigerant piping of air conditioner - Google Patents

Abstract

The present invention relates to a refrigerant pipe connecting device of an air conditioner that can easily install various refrigerant pipes having different outer diameters in a service valve.

The present invention provides a refrigerant pipe for transporting a refrigerant between an outdoor unit and an indoor unit, a service valve connected to the refrigerant pipe to allow the refrigerant to flow in and out of the outdoor unit, an end of the refrigerant pipe connected to the service valve, and positioned at an inner side thereof. A flare member for connecting a refrigerant pipe, and a flare member disposed between the inner circumference of the flare nut and the outer circumference of the refrigerant pipe when the diameters of the service valve and the refrigerant pipe are different, so that refrigerant pipes having different diameters are installed in the service valve. It is configured to include, according to the outer diameter of the refrigerant pipe to insert a plurality of flare members in the inside of the flare nut overlapping to install the refrigerant pipe to the service valve, it is easy to install a variety of refrigerant pipes of different outer diameter to the service valve There is an advantage.

Description

{A connecter for refrigerant piping of air conditioner}

The present invention relates to a refrigerant pipe connecting device of an air conditioner, and more particularly, to a refrigerant pipe connecting device of an air conditioner that can easily install various refrigerant pipes having different outer diameters in a service valve.

In general, an air conditioner is a device for treating intake air and supplying it to a building or a room so as to maintain indoor air in a comfortable condition. The air conditioner is classified into a separate type or a split type and a window type.

The separate type and the integrated type are functionally the same, but the separate type is a cooling device installed in the indoor side and a heat dissipation and compression device installed in the outdoor side to connect the two separated devices by refrigerant piping, and the integrated type functions as cooling heat dissipation. Integrate the hole in the wall of the house or hang the device on the window is installed directly.

Here, the separate type is composed of a large indoor unit performing the heating and cooling function, an outdoor unit performing the heat dissipation and compression function, and a refrigerant pipe connecting the indoor unit and the outdoor unit with each other. A system of a multi-type air conditioner capable of cooling and heating a plurality of rooms by installing a plurality of indoor units in each of the rooms is widely used.

1 is a configuration diagram showing a system of a general multi type air conditioner, and FIG. 2 is a perspective view showing an outdoor unit of a general multi type air conditioner.

In general, as shown in FIG. 1 or FIG. 2, the multi-type air conditioner includes one outdoor unit 2 installed outdoors, a plurality of indoor units 4 installed respectively in a plurality of rooms, the indoor unit 4 and an outdoor unit ( It consists of a refrigerant pipe (6) connecting the 2).

The indoor unit 4 is composed of a first indoor unit 4a, a second indoor unit 4b, and a third indoor unit 4c, and each of the indoor side heat exchangers 8a, 8b, and 8c for exchanging air with a refrigerant. And indoor blower fans 10a, 10b, and 10c and blower motors 12a, 12b, and 12c, respectively.

The outdoor unit 2 is installed on a compressor 14 for compressing the refrigerant at a high temperature and a high pressure, and is installed on a conduit for introducing the refrigerant into the compressor 14 so as to prevent the compressor 14 from being overloaded. The accumulator 16 separating the refrigerant, the outdoor side heat exchanger 18 for exchanging the refrigerant supplied from the compressor 14 with the outdoor air, and the refrigerant transported to the outdoor side heat exchanger 18 are supplied with outdoor air. A plurality of expansion valves 24 for expanding the outdoor blower fan 20 and the outdoor motor 22 and the refrigerant supplied from the outdoor heat exchanger 18 to convert them into low temperature and low pressure liquid refrigerant for heat exchange using It is configured to include).

On the other hand, the outdoor unit 2 is formed with an opening hole on one side of the cabinet 26, the valve support 32 is provided with the service valve 28 and the main service valve 30 is installed in the opening hole.

Here, the service valve 30 is connected to the refrigerant pipe 6 to determine whether to cool the circulation of refrigerant to each of the indoor units (4a, 4b, 4c), the expansion valve 24 is installed on the pipeline installed High pressure side service valve 34 for supplying refrigerant to each indoor unit 4a, 4b, 4c, and low pressure side service valve 36 for recovering refrigerant flowing from each indoor unit 4a, 4b, 4c. do.

A solenoid valve 38 is installed between the high pressure side service valve 34 and the expansion valve 24, and the solenoid valve 38 intercepts the flow of the refrigerant transported to the indoor unit 4.

In addition, the main service valve 30 is installed before the conduit inside the outdoor unit 2 is branched to the plurality of service valves 28 to check whether the refrigerant is circulated to all the indoor units 4a, 4b, and 4c in one operation. Make a decision.

The main service valve 30 is installed on the pipeline through which the refrigerant is discharged from the outdoor side heat exchanger 18, and the high pressure side main service valve 40 determines whether the refrigerant is supplied to the plurality of high pressure side service valves 34. And a low pressure side main service valve 42 installed on a conduit through which refrigerant flows into the compressor 14 to determine whether or not the refrigerant flowed through the plurality of low pressure side service valves 36 is circulated.

3 is an exploded perspective view showing an example of a refrigerant pipe connecting device according to the prior art, Figure 4 is an exploded perspective view showing another example of the refrigerant pipe connecting device according to the prior art.

The refrigerant pipe connecting device of the air conditioner according to the prior art, as shown in Figure 3 or 4, the refrigerant pipe (6) for transporting the refrigerant between the outdoor unit (2) and the indoor unit (4), and the refrigerant pipe (6) And a service valve 28 connected to the inside of the outdoor unit 2 to allow the refrigerant to flow in and out of the outdoor unit 2, and an end of the refrigerant pipe 6 is positioned inward and fastened to the service valve 28. It comprises a flare nut 44 for connecting the refrigerant pipe (6).

Here, the flare nut 44 has a female screw formed on the inner circumferential surface so as to be mated with a male screw formed on the outer circumferential surface of the service valve 28, and an insertion hole 46 into which an end portion of the refrigerant pipe 6 is inserted is provided. Is formed.

The refrigerant pipe 6 uses an appropriate work tool to prevent the end inserted into the insertion hole 46 from being separated from the flare nut 44 and to facilitate connection with the service valve 28. Thereby extending the end outward.

In addition, an O-ring 47 is disposed between the flare nut 44 and the service valve 28 to prevent the refrigerant from leaking to the fastening portion.

However, the refrigerant pipe connecting device of the air conditioner according to the prior art has the refrigerant pipe 6 has a different diameter depending on the capacity of the indoor unit 4, while the service valve 28 is connected to the indoor unit (4) Since it is not possible to predict the capacity of the production of a constant diameter, it is necessary to connect the cold piping 6 of different diameter to the service valve 28, but the flare nut 44 is the service valve 28 and the cold piping ( 6) There is a problem that can be connected only.

As a method for connecting the service valve 28 and the refrigerant pipe 6 having different diameters as described above, the connection pipe 48 having the same diameter is connected to the service valve 28 using the flare nut 44. After the separate installation and direct welding of the connecting portion 50 of the refrigerant pipe (6) having a different diameter from the connecting pipe 48, the service valve 28a and the intermediate portion 51 of the flare nut 44a is welded There is a connection socket 52 of the shape between the service valve 28 and the flare nut 44.

Therefore, there is a problem in that the work of connecting the service valve 28 and the refrigerant pipe 6 is complicated, and additional installation tools and connection sockets 52, etc. are required for welding, thereby increasing installation time and cost. .

In addition, the installation tool must be carried to each installation site, a work space for welding is required, and in particular, there is a problem in that the refrigerant leaks from the welded connection part due to an error in welding.

The present invention was created to solve the above problems, an object of the present invention is to easily install a variety of refrigerant pipes of different diameters in the service valve of the outdoor unit, for this purpose does not require a separate installation tool and work space To provide a refrigerant pipe connecting device of the air conditioner.

The present invention for realizing the above object is a refrigerant pipe for transferring the refrigerant between the outdoor unit and the indoor unit, a service valve connected to the refrigerant pipe and the refrigerant flows in and out to the outdoor unit, the end of the refrigerant pipe is fastened to the service valve inward Is located between the flare nut connecting the service valve and the refrigerant pipe, and the diameter of the service valve and the refrigerant pipe is different between the inner circumference of the flare nut and the outer circumference of the refrigerant pipe, the refrigerant pipe having a different diameter to the service valve It characterized in that it comprises a flare member to be installed.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

5 is a cross-sectional view showing a refrigerant pipe connecting device according to the present invention, Figure 6 is an exploded perspective view showing a first embodiment of the refrigerant pipe connecting device according to the present invention, Figure 7 is a refrigerant pipe connecting device according to the present invention 8 is an exploded perspective view illustrating a second embodiment of the present invention, and FIG. 8 is an exploded perspective view illustrating a third embodiment of a refrigerant pipe connection device according to the present invention.

Here, the air conditioner according to the present invention is the same as the conventional, except for the configuration of the refrigerant pipe connecting device for installing the refrigerant pipe to the service valve of the outdoor unit, it will be described with the same reference numerals.

Refrigerant pipe connection device of the air conditioner according to the present invention, as shown in Figure 5 to 8, the refrigerant pipe 60 for transferring the refrigerant between the outdoor unit (2) and the indoor unit (4), and the refrigerant pipe (60) And a service valve 62 connected to the outdoor unit 2 to allow the refrigerant to flow in and out of the outdoor unit 2, and an end of the refrigerant pipe 60 is positioned inward and fastened to the service valve 62. The flare nut 64 connecting the 60 and the diameter of the service valve 62 and the refrigerant pipe 60 are different between the flare nut 64 and the refrigerant pipe 60 so that the service valve ( 62 is configured to include a flare member 66 to allow the refrigerant pipes 60 having different diameters.

Here, the flare nut 64 has a female screw formed on the inner circumferential surface so as to be mated with a male screw formed on the outer circumferential surface of the service valve 62, and an insertion hole 68 into which an end portion of the refrigerant pipe 60 is inserted is provided. Is formed.

The O-ring 70 is disposed between the flare nut 64 and the service valve 62 to prevent the refrigerant from leaking to the fastening portion.

The refrigerant pipe 60 prevents the end portion inserted into the insertion hole 68 from being separated from the flare nut 64, and also uses an appropriate work tool to facilitate the connection with the service valve 62. The end is extended outward.

In addition, the flare member 66 has a funnel shape, and an end portion of the refrigerant pipe 60 having a smaller diameter is inserted into the insertion hole 68 relative to the flare member 66 having the same diameter as the service valve 62. It is disposed between the inner circumference of the flare nut 64 and the outer circumference of the refrigerant pipe 60 to be seated therein.

The flare member 66 is provided in plural with various diameters, and the flare nut 64 and the refrigerant pipe 60 are inserted so that flare members 66 having different diameters are stacked inside the flare nut 64. To overcome the difference in diameter.

In addition, the stacked flare member 66 is in close contact with each other as the flare nut 64 is fastened to the service valve 62 to prevent the refrigerant from leaking between the flare members 66.

On the other hand, the diameter of the cold pipe 60 is determined according to the capacity of the indoor unit (4), the diameter of the refrigerant pipe 60, which is commonly used in industrial sites as 6.35mm, 9.52mm, 12.7mm, 15.88 Mm is typical.

Therefore, when the service valve 62 for the largest diameter 15.88 is installed in the outdoor unit 2 and the flare nut 64 also has a diameter of 15.88 mm, various refrigerant pipes 60 having a relatively small diameter can be used. It can be installed in the service valve 62 by using the flare member 60 as appropriate.

That is, the flare member 66 is inserted into the flare nut 64 to allow the end of the refrigerant pipe 60 to be seated. The flare member 66 is the refrigerant pipe 60. 6.23, 9.52, 12.7 and the like is provided to correspond to the diameter of, and is inserted to be laminated according to the diameter of the refrigerant pipe (60).

5 shows that the 12.7 refrigerant pipe 60a is installed in the service valve 62 for 15.88 according to the present invention, and the 12.7 flare member 66a is inserted into the flare nut 64 to allow 12.7 refrigerant. The pipe 60a is connected to the service valve 62.

6 shows that the 9.52 refrigerant pipe 60b is installed in the 15.88 service valve 62 according to the present invention, and the 12.7 flare member 66a is inserted into the flare nut 64. The 9.52 flare member 66b is inserted into the 12.7 flare member 66a to be stacked to connect the 9.52 refrigerant pipe 60b to the service valve 62.

7 shows that the 6.35 refrigerant pipe 60c is installed in the 15.88 service valve 62 according to the present invention, and the flare nut 64 has a flare member 66a and a 9.52 flare. The member 66b is inserted and laminated, and the 6.35 flare member 66c is inserted into the stacked 9.52 flare member 66b to connect the 6.35 refrigerant pipe 60c to the service valve 62. do.

Of course, if the flare member 66 is made by subdividing into various diameters, the refrigerant pipe 60 may be easily installed in the service valve 62 even if the refrigerant pipe 60 has any diameter.

Looking at the assembly process of the refrigerant pipe connecting device of the air conditioner according to the present invention configured as described above are as follows.

First, the end of the refrigerant pipe 60 is inserted through the insertion hole 68 of the flare nut 64, and a plurality of flares to compensate for the difference in diameter between the flare nut 64 and the refrigerant pipe 60 At least one or more members 66 are selected and inserted into the flare nut 64 with a center penetrating through an end portion of the refrigerant pipe 60.

At this time, when there are a plurality of selected flare members 66, a flare member having a small diameter is inserted and stacked in the flare member having a large diameter.

Then, the end of the refrigerant pipe 60 is extended to the outside and the end of the refrigerant pipe 60 is in close contact with the inner circumference of the stacked flare member 66, the flare member 66 and the refrigerant pipe ( The flare nut 64 with the end of the end 60 disposed therein is fastened to the service valve 62.

Refrigerant pipe connection device of the air conditioner according to the present invention configured as described above is installed so that the refrigerant pipe to the service valve by inserting a plurality of flare members overlapping the inside of the flare nut according to the outer diameter of the refrigerant pipe, the outer diameter is There is an advantage of simply installing a variety of different refrigerant pipe to the service valve.

In addition, in the conventional case, since the service valve and the refrigerant pipe are installed by welding, a separate welding installation tool is needed, but in the present invention, the installation work can be performed without using a special installation tool, and thus, the installation site There is no need to carry a separate installation tool.

In addition, since the work is easy even in a narrow work space, there is an effect of reducing the space limitation during installation, improving workability and shortening the installation time.

1 is a configuration diagram showing a system of a general multi-type air conditioner,

2 is a perspective view showing an outdoor unit of a general multi-type air conditioner,

3 is an exploded perspective view showing an example of a refrigerant pipe connecting device according to the prior art,

4 is an exploded perspective view showing another example of a refrigerant pipe connecting device according to the prior art;

5 is a cross-sectional view showing a refrigerant pipe connecting device according to the present invention,

6 is an exploded perspective view showing a first embodiment of a refrigerant pipe connection device according to the present invention;

7 is an exploded perspective view showing a second embodiment of the refrigerant pipe connection device according to the present invention;

8 is an exploded perspective view showing a third embodiment of the refrigerant pipe connection device according to the present invention.

<Explanation of symbols on main parts of the drawings>

60: refrigerant piping 62: service valve

64: flare nut 66: flare member

68: insertion hole 70: O-ring

Claims (3)

A refrigerant pipe transferring the refrigerant between the outdoor unit and the indoor unit; A service valve connected to the refrigerant pipe and configured to flow refrigerant into and out of the outdoor unit; A flare nut fastened to the service valve and positioned at an end of the refrigerant pipe to connect the service valve to the refrigerant pipe; And a flare member disposed between the inner circumference of the flare nut and the outer circumference of the refrigerant pipe when the diameters of the service valve and the refrigerant pipe are different from each other so that refrigerant pipes having different diameters are installed in the service valve. Refrigerant piping connection device. The method of claim 1, The flare member is a refrigerant pipe connecting device of the air conditioner, characterized in that the funnel shape. The method according to claim 1 or 2, The flare member is provided with a plurality of different diameters, the refrigerant pipe connecting device of the air conditioner, characterized in that the flare member is arranged to be stacked between the flare nut and the refrigerant pipe.