KR200437907Y1 - Pipe connecting device of air conditioner - Google Patents

Abstract

In the construction stage of a building such as an apartment, the air conditioner refrigerant pipe is pre-buried inside the concrete-pouring wall, and after connecting the pipes to the indoor and outdoor units of the air conditioner, the pipes must be It is easy to connect the joint by the fastening method, and prevents the leakage of refrigerant by blocking the occurrence of gaps at the surface contact area where the pipe is connected,

The air conditioner pipe connecting device according to an embodiment of the present invention is fixed in the connection box buried at the time of building construction, the pressing portion is formed on one side of the screw portion formed on the outer surface, the valve is formed to extend the sleeve to one side of the pressing portion Wow,

A refrigerant pipe coupled to the outside of the sleeve of the valve and having an annular contact portion formed at one end thereof;

And a fastening nut having a first inclined surface corresponding to the close contact portion, and a fastening nut having a second inclined surface formed on the inner surface of the first inclined surface, respectively. The straight pipe portion of the refrigerant pipe adjacent to and is expanded by pressurization of the pressurizing portion to be in close contact with the second inclined surface.

Piping, packing, sleeve, expansion pipe for air conditioner

Description

Pipe connecting device of air conditioner

1 is an excerpt excerpt sectional view of an air conditioner pipe connecting device according to the prior art,

Figure 2 is a schematic use state of the air conditioning pipe connecting device according to the prior art,

Figure 3 is an exploded perspective view of the main portion of the air conditioner pipe connecting device according to an embodiment of the present invention,

Figure 4 is a cross-sectional view of the air conditioning pipe connecting device according to an embodiment of the present invention

Figure 5 is a cross-sectional view of the use state of the air conditioning pipe connection device according to an embodiment of the present invention,

6 is a state diagram used in the air conditioner pipe connection device according to an embodiment of the present invention.

* Explanation of symbols used in the main part of the drawing

10; Connection box

11; Screw

12; Pressurization

13; Sleeve

14; valve

15; Contact

16; Refrigerant piping

17; First slope

18; Second slope

19; Tightening Nut

20; Intuition

21; O-ring

The present invention is to pre-buy the air conditioning refrigerant pipes in the concrete casting wall at the construction stage of the building, such as apartments, and then to connect the pipes of the indoor and outdoor units of the air conditioner after the construction of the wall, in the connection box embedded in the wall The present invention relates to a pipe connecting device for an air conditioner to allow a pipe to be connected by a nut tightening method.

More specifically, it relates to an air conditioner pipe connecting device that facilitates the refrigerant pipe connection work in a narrow space inside the connection box and prevents leakage of refrigerant by blocking a gap at the surface contact portion where the pipe is connected. will be.

Recently, when constructing a building such as an apartment, the air conditioning refrigerant pipe is buried in advance when the floor and walls of the building are concretely installed so that the air conditioner can be conveniently installed after the occupancy of the building. Therefore, after entering the building, the cover of the connection box embedded in the wall can be opened, and the pipes of the indoor and outdoor units can be jointly connected with the refrigerant pipe inside the connection box by a nut tightening method.

As shown in Figure 1 and 2, the air conditioner pipe connecting device according to the prior art, is fixed in the connection box (1) embedded in the building wall, coupled to the screw portion (2) formed on the outer surface A valve (for example, an elbow is used) 5 in which an annular inclined surface 4 is formed at the inlet side of the ball 3,

Refrigerant pipe 7 (for example, the indoor unit or the outdoor unit side) is fitted to the coupling hole (3) of the valve (5), and the engaging jaw (6) corresponding to the inclined surface (4) is formed in an annular shape on the outer periphery. Refrigerant piping),

When fastening to the threaded portion 2 of the valve 5, a fastening nut for jointly connecting the refrigerant pipe 7 to the valve 5 so as to maintain airtightness due to mutual surface contact between the inclined surface 4 and the locking jaw 6. 8,

It is coupled to the coupling hole 3 of the valve 5 and the refrigerant pipe 7, and when the screw part 2 and the fastening nut 8 are fastened, the shape of the refrigerant pipe 7 is deformed (for example, crushed). And a sleeve 9 to prevent the refrigerant from leaking.

In the drawings, reference numeral A denotes a stand type or wall-mounted indoor unit installed in the interior of a building, and B denotes an outdoor unit installed outdoors.

In the air conditioner pipe connecting device of the prior art, the inclined surface 4 and the engaging jaw (6) of the inclined surface (4) and the refrigerant pipe (7) of the refrigerant pipe (7), respectively, is formed of a metal member, If the surface contact part of 6) is not processed correctly, the airtightness of the surface contact part is lowered due to the occurrence of a gap, and thus the refrigerant leaks.

In addition, when the refrigerant pipe 7 is connected to the valve 5 by tightening the fastening nut 8, the inclined surface 4 of the valve 5 and the locking jaw 6 of the refrigerant pipe 7 are correctly connected. Since the matching work to maintain area tightness is required for a high level of skill, the unskilled person cannot easily work, and thus has a problem in that work efficiency is lowered.

In addition, when the air conditioner is reinstalled after moving the air conditioner due to moving, etc., the end of the shape of the sleeve 9 or the refrigerant pipe 7 is deformed uniformly using a cone-shaped tool and reused. It is troublesome to work, and there is a problem in that airtightness is inferior at the surface contact portion where the pipe is connected.

According to one embodiment of the present invention, after laying a refrigerant pipe for air conditioning in a wall in a building construction such as an apartment, and the like after the construction of the wall inside the connection box buried in the indoor unit and outdoor unit pipes to the refrigerant pipe It is related to the pipe connection device for air conditioner, which can be easily connected by nut tightening method to improve workability.

According to one embodiment of the present invention, when connecting the refrigerant pipe and the pipes of the indoor unit and the outdoor unit to each other in the connection box embedded in the wall, the fastening nut is attached to a valve fixed in the connection box (for example, an elbow is used). At the time of tightening, the primary sealing due to expansion of the refrigerant pipe, the secondary sealing by the pressure jaw, and the third sealing by the O-ring are performed at the same time, thereby preventing the refrigerant from leaking due to the gap at the surface contact area where the pipe is connected. Related to plumbing connections for air conditioners to be reliable.

The air conditioner pipe connecting device according to an embodiment of the present invention is fixed in the connection box buried at the time of building construction, the pressing portion is formed on one side of the screw portion formed on the outer surface, the valve is formed to extend the sleeve to one side of the pressing portion Wow,

A refrigerant pipe coupled to the outside of the sleeve of the valve and having an annular contact portion formed at one end thereof;

And a fastening nut having a first inclined surface corresponding to the close contact portion, and a fastening nut having a second inclined surface formed on the inner surface of the first inclined surface, respectively. The straight pipe portion of the refrigerant pipe adjacent to and is expanded by pressurization of the pressurizing portion to be in close contact with the second inclined surface.

At this time, the pressure jaw further comprises a pressure jaw formed in the large diameter portion of the pressing portion, and when the fastening nut is fastened to the threaded portion of the valve by forming a groove in the inner surface of the expansion pipe that is in close contact with the second inclined surface of the fastening nut by pressing the pressure jaw and the groove Due to the mutual compression of, the gap between them is sealed.

It is mounted adjacent to the threaded portion of the valve described above, and further comprises an O-ring sealing the gap between the valve and the close contact when tightening the fastening nut to the valve.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to be described in detail so that those skilled in the art to which the present invention pertains can easily implement the present invention. It does not mean that the technical spirit and scope of the present invention are limited.

As shown in Figure 3 to 6, the air conditioner pipe connecting device according to an embodiment of the present invention is buried in advance during the building construction, the pipe of the indoor unit (A) or outdoor unit (B) side of the air conditioner ( In general, a brass tube is used), which is fixed inside the connection box 10 to which the brass box is fixed, and an annular pressing portion 12 is formed at one side of the threaded portion 11 formed at the outer surface thereof, A valve 14 (e.g., an elbow is used) in which a pipe-shaped sleeve 13 is integrally extended;

The refrigerant pipe 16 coupled to the outside of the sleeve 13 of the valve 14 and having an annular contact portion 15 formed at one end thereof (in this case, the refrigerant pipe 16 in which the brass pipe is used is an indoor unit ( A) or connected to an outdoor unit (B)),

A first inclined surface 17 corresponding to the close contact portion 15 and a fastening nut 19 having a second inclined surface 18 formed on the inner surface of the first inclined surface 17. After coupling the refrigerant pipe (16) to the threaded portion (11) of the valve 14 to the fastening nut (19) when the fastening portion (20) of the refrigerant pipe (16) adjacent to the close contact portion 15 is pressurized ( It expands by the pressurization of 12, and comes in close contact with the 2nd inclined surface 18. As shown in FIG.

In this case, the inclination angle of the above-described first inclined surface 17 may be formed in the range of 40 ° to 50 °, and the inclination angle of the second inclined surface 18 may be formed in the range of 20 ° to 30 °.

The O-ring 21 is mounted adjacent to the threaded portion 11 of the valve 14 and seals the gap between the valve 14 and the close contact 16 when the fastening nut 19 is fastened to the valve 14. It includes more.

In the figure, reference numeral 30 denotes a pressing jaw formed at a large diameter portion (referring to a portion adjacent to the screw portion 11) of the pressing portion 12, and 31 is a tightening nut when tightening the fastening nut 19 to the valve 14. The groove is formed by the pressure jaw 30 on the inner surface of the expansion portion in close contact with the second inclined surface 18 of the nut 19, A is a stand or wall-mounted indoor unit installed in the interior of the building, B is It is an outdoor unit installed outdoors.

Hereinafter, with reference to the accompanying drawings an example of the use of the pipe connection device for an air conditioner according to an embodiment of the present invention will be described in detail.

As shown in FIGS. 5 and 6, a valve 14 (for example, an elbow is fixed inside the connection box 10 installed to be buried in a wall or a floor when building a building such as an apartment or an officetel) Used in the joint of the refrigerant pipe for the air conditioner in the nut tightening method in advance, and then the wall or floor layer is cast concrete.

In case of connecting the pipe of the indoor unit (A) or outdoor unit (B) of the air conditioner to the valve 14 in the connection box 10 after the cover is removed from the connection box 10 to install the air conditioner after the occupancy of the building. In addition, it is possible to prevent the refrigerant from leaking due to the occurrence of a gap in the surface contact portion of the pipe.

The refrigerant pipe 16 is coupled to the sleeve 13 formed on the valve 14 described above, in which the O-ring 21 is coupled to the outside of the sleeve 13. The fastening nut 19 fitted to the outside of the refrigerant pipe 16 is coupled to the threaded portion 11 of the valve 14 to be fastened.

When the fastening nut 19 is fastened to the valve 14 as described above, the valve 15 in the state where the close contact portion 15 of the refrigerant pipe 16 rests on the first inclined surface 17 of the fastening nut 19. As the inclined surface of the pressurizing portion 12 of the valve 14 presses the close contact portion 15 of the refrigerant pipe 16 by the fastening force of the 14 and the fastening nut 19, the refrigerant adjacent to the close contact portion 15 The straight pipe portion 20 of the pipe 16 is expanded (that is, the diameter of the refrigerant pipe 16 is expanded and deformed). In this case, the sleeve 13 of the valve 14 coupled to the inside of the straight pipe portion 20 of the refrigerant pipe 16 serves as a guide when expanding the straight pipe portion 20, thereby minimizing crushing.

Therefore, the expansion pipe portion of the refrigerant pipe 16 is in close contact with the second inclined surface 18 formed inside the first inclined surface 17 of the fastening nut 19, and thus the area of the refrigerant pipe 16 with respect to the fastening nut 19. The moistened area is increased to improve airtightness. At the same time, when the fastening nut 19 is fastened to the valve 14, it is expanded and pressurized by the pressure jaw 30 of the valve 14 to the inner surface of the expansion pipe which is in close contact with the second inclined surface 18 of the fastening nut 19. Due to the groove 31 is formed, due to the mutual compression of the pressing jaw 30 and the groove 31 can be sealed between the gap between them.

In addition, the gap between the valve 14 and the close contact portion 15 is sealed by an O-ring 21 mounted adjacent to the threaded portion 11 of the valve 14.

That is, the above-described straight pipe portion 20 of the refrigerant pipe 16 is expanded and closely adhered to the second inclined surface 18 of the fastening nut 19 to form a primary seal, and the pressure jaw 30 of the valve 14 is formed. Due to the mutual compression of the grooves 31 of the expansion pipe portion, the secondary sealing is made, and is coupled to the threaded portion 11 of the valve 14 to be in close contact with the contact portion 15 of the refrigerant pipe 16 ( 21) the third sealing is achieved.

As described above, since the airtightness at the surface contact portion of the refrigerant pipe 16 to the valve 14 fixed to the connection box 10 is improved, the refrigerant outflow due to the generation of gaps at the surface contact portion to which the pipe is connected Is prevented.

As described above, the air conditioner pipe connecting device according to an embodiment of the present invention has the following advantages.

After constructing the air conditioner refrigerant pipe on the wall in the construction of apartments, etc., the non-skilled person also works when connecting the pipes of the indoor and outdoor units to the refrigerant pipe in the connection box embedded in the wall after the wall construction. Reduced man-hours can be connected to improve the work efficiency.

On the other hand, when connecting the refrigerant pipe and the pipes of the indoor unit and the outdoor unit to each other in the connection box embedded in the wall, the first sealing and the pressurization due to the expansion of the refrigerant pipe when the fastening nut is fastened to the valve fixed inside the connection box Since the secondary sealing by the jaw and the tertiary sealing by the O-ring are performed at the same time, the refrigerant is prevented from leaking due to the gap at the surface contact portion to which the pipe is connected, thereby ensuring reliability.

Claims (2)

A valve which is fixed inside the connection box buried during construction and has a pressurization part formed on one side of a threaded part formed on an outer surface thereof, and a sleeve extended to one side of the pressurization part; A refrigerant pipe coupled to the outside of the sleeve of the valve and having an annular contact portion formed at one end thereof; And And a fastening nut having a first inclined surface corresponding to the close contact portion and a second inclined surface formed at an inner side of the first inclined surface, and coupling a refrigerant pipe to the sleeve, and then tightening the fastening nut to the threaded portion of the valve. The air conditioner pipe connecting device of claim 2, wherein a straight pipe portion of the refrigerant pipe adjacent to the close contact portion is expanded by pressurization of the pressurizing portion to be in close contact with the second inclined surface. The method according to claim 1, further comprising a pressing jaw formed in the large diameter portion of the pressing portion, when the fastening nut is fastened to the threaded portion of the valve by forming a groove on the inner surface of the expansion portion in close contact with the second inclined surface of the fastening nut An air conditioner pipe connecting device, characterized in that the air gap between the pressing jaw and the groove is airtight.

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