WO2015020320A1

WO2015020320A1 - Apparatus for connecting air conditioner refrigerant transfer tube

Info

Publication number: WO2015020320A1
Application number: PCT/KR2014/006486
Authority: WO
Inventors: 허성룡; 이상목; 김태호
Original assignee: 주식회사 화승알앤에이
Priority date: 2013-08-08
Filing date: 2014-07-17
Publication date: 2015-02-12
Also published as: KR101328718B1

Abstract

The present invention relates to an apparatus for connecting an air conditioner refrigerant transfer tube. The apparatus for connecting an air conditioner refrigerant transfer tube according to the present invention makes the inner peripheral surface of a transfer tube be formed of CR rubber, thereby improving refrigerant permeability and long-term durability, and forms a CM resin layer on the CR rubber layer, thereby further improving permeability resistance.

Description

Air Conditioning Refrigerant Transfer Pipe Connection

The present invention relates to an air conditioner refrigerant conveying pipe connecting device that can significantly reduce the noise and vibration generated during the conveyance of the refrigerant of the air conditioner, in particular, the refrigerant conveying pipe for supplying the air conditioner refrigerant and the integrated pipe of the air conditioner by the compression sleeve It is easy and easy to connect and seal, but the inner circumferential surface of the transfer pipe is formed of CR rubber to improve the refrigerant permeability and long-term durability, and by forming the CM resin layer on the top of the CR rubber to further improve the permeability and refrigerant permeability. The present invention relates to an air conditioner refrigerant conveying pipe connecting device.

In general, in the home, vehicle and industrial equipment using a refrigerant such as freon gas, in order to transfer the liquid or gas phase refrigerant, the clamp is most often used for the interconnection of the air conditioner refrigerant transfer hose and the pipe of the air conditioner.

That is, one end is drawn out through an opening hole formed at the other end, and the end is bent vertically upward, and the rotating piece is fitted to the vertical plate of the bending body in which the vertical plate is formed, wherein the two vertical plates are joined together. The U-shaped holder is coupled to the upper portion of the vertical plate so as to be fixed, thereby coupling and fixing both sides of the air conditioner refrigerant transfer hose and the air conditioner pipe.

However, when simply clamping only the clamp for the interconnection of the air conditioner refrigerant transfer hose and the pipe of the air conditioner as described above, there is a disadvantage that the coupling force and sealing of the refrigerant transfer hose and the air conditioner pipe are extremely weak.

In addition, the clamps for fastening the refrigerant transport hose and the pipe of the air conditioner are easily damaged by external shocks, so that the hose connection part is recessed, and there are many problems such as extreme vibrations during the transport of the refrigerant.

As a technique for solving such a problem, in the "air conditioner refrigerant transfer hose connecting device" filed and registered by the present applicant (Korean Patent Publication No. 10-1232326, Patent Document 1), the single radish and insert pipe of the refrigerant transfer hose is interpolated When fastening brackets with wrinkled concave-convex portions are formed on the outer side of the end of the hose connector to be crimped and installed with the end of the hose connecting portion, one end of the refrigerant transport hose is inserted into the hose connector, and the fastening bracket is crimped using a compressing machine to seal and fix it. The fastening tool is pressed in a state of being in close contact with the corrugated irregularities formed at the outer end of the hose connector so as to be coupled and fixed in a more rigid state, and the transfer hose connector is prevented from being recessed by the insert pipe.

In Patent Document 1, the transfer hose was continuously formed in the order of NBR rubber, EVOH resin, PET resin, and EPDM rubber.

This structure increases wear resistance and tensile strength by NBR rubber, EVOH resin provides refrigerant permeability, PET resin provides chemical resistance and water resistance, and EPDM provides weatherability and heat resistance and cold resistance.

However, as a result of continuously testing the patent document 1, there was a problem that the refrigerant permeability and long-term durability is inferior.

In addition, the wrinkled convexities of the fasteners and the hoses coincide with each other, and thus, when forcedly rotated and rotated, the phenomenon of separating the hoses from the fasteners may occur.

* Prior art literature *

(Patent Document 1) KR 10-1232326 (2013.02.05)

The air conditioner refrigerant conveying pipe connecting device of the present invention is more excellent in long-term durability and higher permeability and permeability of the refrigerant than the patent document 1 as described above, and the fastening tool and the conveying pipe to have a more secure fastening state.

More specifically, the internal NBR rubber is changed to CR rubber to improve refrigerant permeability and durability, and the intermediate resin layer is also changed from EVOH resin to CM resin to improve permeability.

In addition, the crimping position of the crimping sleeve is partly corresponding to the groove forming groove of the air conditioner integrated copper tube, and part of the crimping sleeve is corresponding to the external protrusion between the groove forming grooves, so that the crimping sleeve and the conveying pipe are firmly pressed and fixed. In order to improve the permeability of the refrigerant.

In order to solve the above problems, the air conditioner refrigerant delivery pipe connecting device according to the present invention includes a first pipe part 11 having a constant diameter and a second pipe part 12 having an outer diameter and an outer diameter smaller than the first pipe part 11. ) And an outer locking jaw 13 formed on the outer circumferential surface between the first pipe part 11 and the second pipe part 12 and having an outer diameter larger than that of the first pipe part 11. The sleeve fitting groove 14 of the shape which is dug toward the center is formed in the outer peripheral surface of the front-end | tip of the 2nd pipe part 12 which contact | connects the outer latching jaw 13, and it faces to the other direction from the position spaced apart from the said sleeve fitting groove 14 Groove forming grooves 15 of the groove shape toward the center at regular intervals, and a plurality of outer projections 16 located between the groove forming grooves 15 are formed, the air conditioner integrated copper tube 10 made of the same material; The inner circumferential surface is fitted to be in close contact with the outer circumferential surface of the second pipe part 12, and the CR rubber layer 21, the CM resin layer 22, the EPDM rubber layer 23, the PET resin layer 24, and the EPDM sequentially from the inside to the outside. A transfer pipe 20 made of a rubber layer 25; It consists of a cylindrical portion 31 having a predetermined diameter, and the bent portion 32 formed to be bent toward the center at one end of the cylindrical portion 31, made of a stainless material, the end of the bent portion 32 is In the state where the transfer pipe 20 is inserted in the state fitted in the sleeve fitting groove 14, the press fitting is fastened to the center at three places, and the three grooves 33 formed at the center are pressed. It comprises a sleeve (30).

At this time, the air conditioner integrated copper tube 10 has a width of the groove forming groove 15 is 1.5 ~ 2.5mm, the depth of the groove forming groove 15 is characterized in that made of 0.3 ~ 0.6mm.

In addition, the crimping sleeve 30 has two grooves 33 on both sides of the three grooves 33, the center of which corresponds to the position of the groove forming groove 15 of the air conditioner integrated copper tube 10, and the central one groove part. Reference numeral 33 is characterized in that the center corresponds to the outer projection 16 between the groove forming groove (15).

According to the present invention, the long-term durability is excellent, the refrigerant permeability and permeability are high, and the fastener and the transfer pipe can have a more secure fastening state.

In addition, the crimping position of the crimping sleeve is partly corresponding to the groove forming groove of the air conditioner integrated copper tube, and part of the crimping sleeve is corresponding to the external protrusion between the groove forming grooves, so that the crimping sleeve and the conveying pipe are firmly pressed and fixed. The refrigerant permeability can be improved.

1 is a cross-sectional view showing an air conditioner refrigerant conveying pipe connecting device of the present invention.

Figure 2 is a partially cut perspective view showing the structure of the transfer pipe in the present invention.

Figure 3 is a cross-sectional view showing the compression sleeve before the compression in the present invention.

Figure 4 is a cross-sectional view showing the shape of the air conditioner integrated copper tube in the present invention.

* Detailed description of the major symbols in the drawings *

10: air conditioner integrated copper tube

11: the first department

12: Second Division

13: external locking jaw

14: sleeve fitting groove

15: groove forming groove

16: external protrusion

20: transfer pipe

21: CR rubber layer

22: CM resin layer

23: EPDM rubber layer

24: PET resin layer

25: EPDM rubber layer

26: outside irregularities

27: medial unevenness

30: compression sleeve

31: cylindrical part

32: bend

33: groove

a: width

b: depth

Hereinafter, the air conditioner refrigerant transfer pipe connecting device of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, the air coolant conveying pipe connecting device is largely composed of an air conditioner integrated copper tube 10, the conveying pipe 20 and the compression sleeve (30).

Air conditioner integrated copper tube 10 is a component of the present invention is made of a copper material made of an integral whole as a tube connected to the air conditioner.

The air conditioner integrated copper tube 10 comprises a first tube portion 11 having a constant diameter and a second tube portion 12 having an outer diameter and an outer diameter smaller than the first tube portion 11 as shown in the drawing. It is formed on the outer circumferential surface between the first tube portion 11 and the second tube portion 12, and further comprises an outer locking jaw (13) having an outer diameter larger than the first tube portion (11).

In addition, a sleeve fitting groove 14 having a recessed shape toward the center is formed on the outer peripheral surface of the distal end of the second pipe portion 12 in contact with the outer locking jaw 13.

In particular, the groove forming groove 15 and the outer protrusion 16 located between the groove forming groove 15 and the groove forming groove 15 of the shape which is recessed toward the center at a predetermined interval from the position spaced apart from the sleeve fitting groove 14 is Many are formed.

At this time, the width (a) of the groove forming groove 15 is made of 1.5 ~ 2.5mm, the depth (b) of the groove forming groove 15 is preferably made of 0.3 ~ 0.6mm, groove forming groove 15 The outer projections 16 in between preferably take the form of trapezoids such that the sides are inclined as shown.

The width and depth of the groove forming groove 15 is very important, and when the width is less than the dimension, the inner end of the conveying pipe 20 pressed by the pressing sleeve 30 is the bottom surface of the groove forming groove 15. It may not be in contact with the gap may occur, if the width exceeds the above dimensions, the transfer pipe 20 made of a rubber material as a whole may not be enough pressure by the compression sleeve 30 may not be a gap. There may be a problem that the transfer pipe 20 is missing.

In addition, when the depth of the groove also exceeds the above dimensions, the inner end of the transfer pipe 20 may not come into contact with the bottom surface of the groove forming groove 15, and if it does not meet the dimensions, the transfer pipe 20 is pulled out. Problems may arise.

In addition, the external protrusion 16 has a trapezoidal shape to further improve the sealing property between the transfer pipe 20 and the air conditioner integrated copper tube 10.

The conveying pipe 20, which is a component of the present invention, is fitted so that the inner circumferential surface is in close contact with the outer circumferential surface of the second pipe part 12, and the CR rubber layer 21, the CM resin layer 22, and the EPDM rubber layer are sequentially sequentially from the inner side to the outer side. (23), PET resin layer 24, EPDM rubber layer (25).

The transfer pipe 20 is formed in a cylindrical shape, and when the compression sleeve 30 is fitted into the compression sleeve, as shown in FIG. 1, the outer circumferential surface thereof has a plurality of outer unevennesses corresponding to the grooves 33 of the compression sleeve 30. 26 is formed, and the inner circumferential surface is formed with the inner concave-convex 27 corresponding to the groove-forming groove 15 and the outer protrusion 16 of the air conditioner integrated copper tube 10.

At this time, as shown in FIG. 1, the outer grooves 33 are located at three locations, while the groove forming grooves 15 are located at six locations, and the outer concave-convex 26 is formed by the transfer pipe 20 itself. Since the inner concave-convex 27 is alternately positioned, the conveying pipe 20 is not easily separated between the air conditioner integrated copper tube 10 and the crimping sleeve 30, but also difficult to be separated by force.

In addition, the cross-sectional structure of the transfer pipe 20 as described above has a large difference from the conventional transfer hose.

In the technique disclosed in Patent Literature 1, layers are formed in order from NBR rubber, EVOH resin, NBR rubber, PET resin, and EPDM rubber from inside to outside.

On the other hand, in the present invention is composed of the CR rubber layer 21, CM resin layer 22, EPDM rubber layer 23, PET resin layer 24, EPDM rubber layer 25 from the inside to the outside three places from the inside It is made of different materials.

NBR rubber, called nitrile rubber, is known to have high wear resistance and high tensile strength, and thus is commonly used as an oil-resistant packing type.

Such NBR rubber has a good sealing property, but there is a problem that the resistance to environmentally friendly refrigerants such as "N410A" is not good, the initial durability is excellent but long-term durability is poor.

On the other hand, the CR rubber layer 21 made of chloroprene rubber not only has good resistance to various kinds of refrigerants, but also has excellent mechanical strength and high acid resistance, and is commonly used as a rubber product for steelmaking.

Accordingly, the CR rubber layer 21 provides excellent refrigerant permeability and long-term durability compared to the prior art.

In addition, the CM resin layer 22 adjacent to the CR rubber layer 21 serves to increase the permeability compared to the conventional EVOH resin.

In addition, both the third layer and the outermost layer are formed of EPDM rubber to improve weather resistance and heat resistance.

The pressing sleeve 30, which is a component of the present invention, has a cylindrical portion 31 having a predetermined diameter as shown in FIG. 3, and a bent portion 32 that is bent toward the center at one end of the cylindrical portion 31. It is made of stainless steel.

At this time, as shown in Figure 1, the end portion of the bent part 32 is pressed into the center at three places in the state in which the transfer pipe 20 is inserted in the state fitted in the sleeve fitting groove (14). The three groove parts 33 which are fastened and dug toward the center are formed.

In particular, the compression sleeve 30 has two grooves 33 on both sides of the three grooves 33, the center of which corresponds to the position of the groove forming groove 15 of the air conditioner integrated copper tube 10, and the central one groove part. It is preferable that the center 33 corresponds to the outer protrusion 16 between the groove forming grooves 15.

This causes the crimping position of the crimping sleeve 30 to correspond in part to the groove forming groove 15 of the air conditioner integrated copper tube 10, and part of the crimping sleeve 30 to correspond to the external protrusion 16 between the groove forming grooves 15. The pressing sleeve 30 and the delivery pipe 20 are firmly pressed and fixed, and the refrigerant permeability can be improved.

The present invention can be applied to vehicles, homes and various industrial air conditioners or cooling devices.

Claims

In the air conditioner refrigerant conveying pipe connecting device,

Between the first pipe part 11 having a constant diameter, the second pipe part 12 having an outer diameter and an outer diameter smaller than the first pipe part 11, and between the first pipe part 11 and the second pipe part 12. It is formed on the outer circumferential surface, and consists of an outer locking jaw 13 having an outer diameter larger than that of the first pipe portion 11, and centers the outer circumferential surface of the tip of the second pipe portion 12 in contact with the outer locking jaw 13. A groove fitting groove 14 having a recessed shape is formed, and a groove forming groove 15 having a recessed shape toward the center at a predetermined interval toward the other direction from a position spaced apart from the sleeve fitting groove 14 and groove forming. A plurality of external protrusions 16 are formed between the grooves 15, and the air conditioner integrated copper tube 10 made of the same material;

The inner circumferential surface is fitted to be in close contact with the outer circumferential surface of the second pipe part 12, and the CR rubber layer 21, the CM resin layer 22, the EPDM rubber layer 23, the PET resin layer 24, and the EPDM sequentially from the inside to the outside. A transfer pipe 20 made of a rubber layer 25;

It consists of a cylindrical portion 31 having a predetermined diameter, and the bent portion 32 formed to be bent toward the center at one end of the cylindrical portion 31, made of a stainless material, the end of the bent portion 32 is In the state where the transfer pipe 20 is inserted in the state fitted in the sleeve fitting groove 14, the press fitting is fastened to the center at three places, and the three grooves 33 formed at the center are pressed. Configured to include a sleeve 30,

Air conditioning refrigerant delivery pipe connection.
The method of claim 1,

The air conditioner integrated copper tube 10 has a width of the groove forming groove 15 of 1.5 ~ 2.5mm, groove depth of the groove forming groove 15, characterized in that made of 0.3 ~ 0.6mm, air conditioning refrigerant transfer pipe connection Device.
The method of claim 2,

The pressing sleeve 30 has two grooves 33 on both sides of the three grooves 33, the center of which corresponds to the position of the groove forming groove 15 of the air conditioner integrated copper tube 10, and the central one groove 33. ) Is characterized in that the center corresponds to the outer projection 16 between the groove forming groove 15,

Air conditioning refrigerant delivery pipe connection.