KR101892180B1 - Apparatus for connecting pipes of air conditioner and method for connecting pipes of air conditioner using it - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping connection device for an air conditioner for connecting a piping used in an air conditioner to a connected object, and a piping connection method using the same. According to the present invention, an insertion member is inserted into an end portion to support an inner circumferential surface of a pipe; A connecting member having a fitting portion to be fitted to the outside of the end portion of the pipe at one side and a fastening portion to fasten the fastened member at the other side; A tightening member constrained on the outer side of the fitting portion so as to fasten the connecting member with the pipe into which the insertion member is inserted and having at least a part of the inner diameter smaller than the outer diameter of the fitting portion; . Thus, by tightly inserting the tightening member into the connecting member, it is possible to prevent the leakage of the refrigerant gas in the piping by improving the bonding force and sealing force between the piping and the connecting member, minimizing the deformation of the piping, , The construction method is convenient and the construction time can be shortened.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a piping connection apparatus for an air conditioner, and a piping connection method using the piping connection apparatus. 2. Description of the Related Art [0002]

The present invention relates to a piping connection apparatus for an air conditioner and a piping connection method using the piping connection apparatus. More particularly, the present invention relates to a piping connection apparatus for an air conditioner for connecting a piping used in an air conditioner to a connected object, and a piping connection method using the same.

Generally, the air conditioner includes a compressor, a condenser, and an evaporator, and is cooled and circulated to discharge the heat of the room to the outside to cool the room. At this time, the compressor, the condenser, and the evaporator are connected to a pipe through which the refrigerant can be transferred. After the refrigerant absorbs the heat of the room, it is discharged to the outside.

In the case of a separate type air conditioner, an indoor unit including an evaporator and a blower fan, an outdoor unit installed outside the room including a compressor and a condenser, and the refrigerant circulates through the indoor unit and the outdoor unit along the pipe, Carry.

In the piping connection work for connecting the indoor unit and the outdoor unit of the air conditioner, the ends of the two pipes to be connected are welded while being in surface contact. However, since the welding is not uniform, the refrigerant gas leaks due to the damage of the welding portion, There is a problem that the surrounding heat insulating material and the electric wire are damaged due to welding heat and the risk of fire is high. In addition, there is a problem that the copper pipe is damaged as the air conditioner is repeatedly removed and reinstalled.

In the conventional Korean Utility Model Patent Publication No. 20-0448487, a pipe coupled to a socket is moved by a fastening force of a fastening member so as to be caught by a step of a socket, and at the same time, a sealing member is compressed and expanded by the urging of a fastening member, And a piping connection device for an air conditioner which can seal the outer peripheral surface and the inner peripheral surface of the socket to prevent leakage of the refrigerant gas and use it safely.

In Korean Registered Utility Model No. 20-046768, a cover connecting portion for guiding a position to be fixed to a connecting body can be easily and quickly carried out with the piping connecting operation being fixed by being fitted to the end portion of the connecting body, The sealing member for a piping connection device of an air conditioner and the piping connection device for an air conditioner having the same, which can precisely intervene between the inner circumferential surface of the additional bellows portion and the inclined surface of the connecting body to seal the refrigerant passage, .

Korean Utility Model Laid-Open No. 20-2016-0003855 discloses a structure in which a pipe and a connection tube are coupled to a nut member and then an end portion of the pipe is opened to the outside by the enlarged diameter portion and tightly fixed between the connection tube and the nut member, A piping connector can be easily and hermetically connected without using a separate tool such as a scraper.

The conventional pipe connecting apparatus includes a connecting member formed on both sides of a bolt between two pipes, and two nut members enclosing a pipe and a connecting member, respectively. When the nut is tightened from both sides, the inner pipe, the connecting member, So that the sealing force is improved. However, this has a problem that the sealing member is likely to be in contact with the refrigerant gas and corroded, and the deformation of the sealing member due to pressurization is uneven.

On the other hand, when the end portion of the pipe is deformed and airtightly deformed so as to spread outwardly, cracks are likely to occur at the end portion of the pipe, which may cause breakage at the pipe connecting portion, There was a problem that the gas could leak.

In order to solve the problems of the background art described above, it is an object of the present invention to provide a piping connection device for an air conditioner having an improved sealing ability to prevent leakage of a refrigerant gas flowing in a piping while minimizing deformation of the piping to prevent breakage, The present invention has been made in view of the above problems.

According to another aspect of the present invention, there is provided a piping connection apparatus for connecting a piping used in an air conditioner to a connected body, the piping connection apparatus comprising: an insertion member inserted inside the end to support an inner circumferential surface of the piping; ; A connecting member having a fitting portion to be fitted to the outside of the end portion of the pipe at one side and a coupling portion to be coupled to the other side at the other side; And a tightening member which is pressed against the outer side of the fitting portion so as to fasten the connecting member with the pipe inserted with the insertion member and at least a part of the inner diameter is smaller than the outer diameter of the fitting portion.

Preferably, the inserting member is formed with a projection protruding outward at one side thereof, so that insertion into the pipe is restricted.

Preferably, the insertion member is formed with a groove or a protrusion along the circumferential direction on an outer circumferential surface in contact with the pipe.

Preferably, the connecting member is formed with a groove or a protrusion along the circumferential direction on the inner circumferential surface of the fitting portion in contact with the pipe.

Preferably, the connecting member is provided with an inner engaging jaw that restricts the engaging position of the pipe inserted with the insertion member into the inner peripheral surface of the fitting portion.

Preferably, the connecting member is formed with an outer engaging jaw that restricts the engaging position of the tightening member on the outer peripheral surface of the fitting portion.

Preferably, the tightening member is formed such that the inner diameter of the intermediate portion is smaller than the inner diameter of the both side chambers.

Preferably, the tightening member has a smaller inner diameter toward a rear end in a direction of insertion into the fitting portion.

According to another aspect of the present invention, there is provided a piping connection method using an air conditioner piping connection apparatus, the piping connection method using the piping connection apparatus described above, wherein the insertion member is inserted into an end of the piping, A piping preparing step of providing a tightening member on the outside of the piping; Fitting a fitting portion of the connecting member to the outside of the end portion of the pipe; Fitting the tightening member to the outer side of the fitting portion to tighten the pipe and the connecting member; .

Preferably, the method further comprises: a hermetic liquid application step of applying a hermetic liquid to the outside of the end portion of the pipe so as to close the space between the pipe and the fitting portion before the force fitting step; .

Preferably, the piping is inserted into the inner engaging step formed on the inner side of the fitting part before the force fitting step, and the end position of the fitting part is marked on the outer circumferential face of the pipe so that the pipe is inserted into the fitting part An insertion depth display step of displaying an insertion depth to be inserted; And an insertion position confirming step of confirming the insertion position of the pipe from the indicated end position when the pipe is inserted into the fitting part after the forced fitting step.

INDUSTRIAL APPLICABILITY The piping connection device for an air conditioner and the piping connection method using the same according to the present invention can prevent leakage of a refrigerant gas in a piping by enhancing a coupling force and a sealing force between a piping and a connection member.

In addition, the present invention minimizes the deformation of the pipe by inserting the inserting member into the inside of the pipe during the piping connection process, thereby preventing breakage of the pipe.

Further, according to the present invention, after the insertion member and the connection member are coupled to the end portion of the pipe, the fastening member is forcedly fitted from the outside of the connection member, so that the construction method is convenient and the construction time can be shortened.

Further, according to the present invention, the fastening part is formed on the other side of the connecting member to which the piping is connected at one side, thereby facilitating the detachment from the object to be connected.

Further, according to the present invention, a groove or protrusion may be formed in an insertion member or a connecting member that contacts the pipe, thereby improving the tightening and sealing force with the pipe.

In addition, the present invention can be easily repaired after the pipe connection is completed because the defective portion is exposed when a defect occurs.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembled perspective view of a piping connection device of the present invention. FIG.
2 is an assembled cross-sectional view illustrating a piping connection apparatus of the present invention.
3 (a) is a sectional view showing a first embodiment of a fastening member constituting the present invention.
Fig. 3 (b) is a sectional view showing a second form of the tightening member constituting the present invention. Fig.
Fig. 3 (c) is a sectional view showing a third form of the fastening member constituting the present invention. Fig.
4 is a cross-sectional view showing a state before the tightening member is forcedly fitted by the piping connection method of the present invention.
5 is a cross-sectional view showing a state in which a fastening member is forcedly fitted by a piping connection method of the present invention.
6 is a cross-sectional view showing a state in which the piping connection device of the present invention is fastened by a piping connection method;
7 is a view showing a piping box equipped with a piping connection device for an air conditioner of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A piping connection device for connecting an air conditioner pipe and an object to be connected is a piping connection device for connecting an indoor unit of an air conditioner and an outdoor unit to form a flow path for circulating a refrigerant gas, And the object to be connected is a component connected to the end of the pipe such as a connecting portion of an indoor unit or an outdoor unit connected to the pipe, a pressure gauge for measuring the pressure in the pipe, a connecting pipe connecting the ends of the two pipes, and other pipes.

As shown in FIGS. 1 and 2, the pipe connection apparatus for an air conditioner according to the embodiment of the present invention is largely composed of an insertion member 20, a connecting member 30, and a tightening member 40.

The insertion member 20 is inserted inside the end portion of the pipe 10 to support the inner circumferential surface of the pipe 10. The insertion member 20 is composed of an insertion portion 21, a projection 22, and a projection 23.

The insertion portion 21 is inserted into the pipe 10 and the insertion portion 21 is formed so that the outer diameter of the insertion portion 21 is equal to or smaller than the inner diameter of the pipe 10, can do. At this time, the engaging force between the pipe 10 and the insertion member 20 can be improved by the groove portion 21a formed along the circumferential direction on the outer peripheral surface of the insertion portion 21 which is in contact with the inner circumferential surface of the pipe 10. Although not shown in the drawing, protrusions may be formed on the outer circumferential surface of the insertion portion 21. [

The protruding portion 22 is a portion protruding outward at one side of the insertion member 20 and restricts the insertion of the insertion member 20 inserted into the pipe 10. It is preferable that the inner diameter of the projecting portion 22 is formed to be equal to the inner diameter of the insertion portion 21 so that the cross section of the flow path of the refrigerant flowing in the insertion member 20 is not deformed, 10 so that the pipe 10 in which the insertion member 20 is inserted does not have a step on the outer surface when the insertion member 20 and the pipe 10 are coupled to each other so as to be easily fitted to the connection member 30 .

The protruding jaw 23 is a step portion due to the difference in outer diameter between the insertion portion 21 and the protruding portion 22 and the end surface of the pipe 10 is brought into close contact with the protruding protrusion 23 to limit the insertion of the insertion member 20. [ do.

The connecting member 30 has a fitting portion 31 to be fastened to the pipe 10 at one side and a fastening portion 32 to be fastened to the connected member at the other side.

The fitting portion 31 is fitted to the outside of the end portion of the pipe 10 and the inner diameter of the fitting portion 31 is formed to be equal to or larger than the outer diameter of the pipe 10 so that the pipe 10 is fitted to the fitting portion 31 Can be inserted. The engaging force between the pipe 10 and the fitting portion 31 can be improved by the groove portion 31a formed along the circumferential direction on the inner circumferential surface of the fitting portion 31 contacting the pipe 10 at this time. Although not shown in the drawings, protrusions may be formed on the inner circumferential surface of the fitting portion 31.

An inner engagement protrusion 33 protruding inward is formed on the inner circumferential surface of the fitting portion 31 to limit the engagement position of the pipe 10 into which the insertion member 20 is inserted. It is therefore preferable that the inner diameter of the inner stopping jaw 33 is formed to be smaller than the outer diameter of the pipe 10 so as to limit the engagement position of the pipe 10 into which the insertion member 20 is inserted, So as not to deform the flow path cross-section of the refrigerant gas flowing in the connecting member 30 and the insertion member 20.

An outer locking protrusion 34 protruding outward is formed on the outer circumferential surface of the fitting portion 31 to limit the fitting position of the tightening member 40 fitted to the outside of the fitting portion 31.

The fastening part 32 is a part fastened to the object to be connected to the pipe 10, and a screw thread is formed on the outer circumferential surface to easily attach / detach the object to / from the object to be connected.

When the air conditioner is installed in the air conditioner, it may be an indoor unit or an outdoor unit. In the case where the air conditioner is not yet installed, it may be a cover for sealing the unused pipe 10 or a connecting pipe for connecting a plurality of pipe ends. On the other hand, gas may be supplied to one end of the pipe 10 to check the leakage of the pipe 10, and pressure of the other end may be measured to confirm gas outflow in the pipe 10. Therefore, the object to be connected may be a gas supply pipe and a pressure gauge.

The tightening member 40 is detachably fitted on the outer side of the fitting portion 31 so as to fasten the pipe 10 into which the insertion member 20 is inserted and the connecting member 30, Is formed to be smaller than the outer diameter of the fitting portion (31). At this time, the front end in the direction of insertion into the fitting portion 31 may be chamfered inside and outside. The outer chamfer can indicate the joining direction when the user uses the tightening member 40 and the inner chamfer can fit the outer periphery of the fitting portion 31 and the center of the tightening member 40 And is referred to as an inlet portion 41 hereinafter.

As shown in Fig. 3, the tightening member 40 is shown in three forms, but any shape can be used as long as the tightening member 40 is held in the fitting portion 31. [

3 (a), the inner diameter d2 of the intermediate portion is formed to be smaller than the inner diameters d1 and d3 of the both side walls. Thereby, the fitting portion 31 and the pipe 10 are constrained and fastened by the intermediate portion of the tightening member 40.

Second, the tightening member 40a shown in FIG. 3 (b) is formed to have a smaller inner diameter toward the rear end in the direction of insertion into the fitting portion 31, and the inner diameter d4 of the front end is smaller than the inner diameter 40b Is small. This is inclined so as to narrow inward toward the rear end of the tightening member 40a and is constrained by the rear end portion of the tightening member 40 upon insertion into the fitting portion 31. [

Thirdly, the tightening member 40b shown in Fig. 3 (c) is formed so that the inner diameter becomes smaller toward the rear end in the direction of insertion into the fitting portion 31, and the inner diameter d6 of the front end Is small. The third tightening member 40b can be divided into a front portion and a rear portion in which the inclination angle of the inner peripheral surface with respect to the central axis of the tightening member 40b is different. The inclination angle [theta] 1 of the front portion of the tightening member 40b may be formed larger than the inclination angle [theta] 2 of the rear portion.

As described above, by tightening the fastening member 40 after the insertion member 20 and the connecting member 30 are fastened to the pipe 10, the coupling force and the sealing force between the pipe 10 and the connecting member 30 It is possible to prevent the refrigerant gas from leaking out of the piping 10.

In addition, it is possible to minimize the deformation of the pipe 10 during the pipe connection process, thereby preventing the pipe 10 from being damaged.

Further, since the piping can be connected irrespective of the skill of the operator, the construction method is convenient, the construction time can be shortened, and the fastening part (32) . ≪ / RTI >

Hereinafter, a piping connection method using the piping connection device for an air conditioner, which is another aspect of the present invention, will be described in detail with reference to FIG. 4 to FIG.

The piping connection method of the present invention can be divided into a piping preparing step, a connecting member fitting step, and a force fitting step.

The piping preparation step is a step of inserting the insertion member 20 into the end portion of the pipe 10 and providing the fastening member 40 on the outside of the pipe 10 so that the insertion of the insertion member 20 and the fastening member 40 may be arranged in any order. The reason for providing the fastening member 40 is that the pipe 10 is generally embedded in the wall surface or the other end of the end portion to be connected to the object to be connected is fixed to the pipe connection box or the like, The fastening member 40 can not be inserted.

It is possible to remove the chips and burr of the piping 10 and contaminants in the piping 10 after cutting the end of the piping 10 to be connected before the piping preparing step. This allows the insertion member 20 to be smoothly inserted into the pipe 10 in the pipe preparation step.

The connecting member fitting step is a step of fitting the fitting portion 31 of the connecting member 30 to the outside of the end portion of the pipe 10 into which the insertion member 20 is inserted as shown in Fig.

As shown in Fig. 5, the forced fitting step is a step of forcing the fastening member 40 provided outside the pipe 10 in advance outside the fitting portion 31 fitted in the pipe 10, 10) and the connecting member (30). At this time, a separate tool may be required to securely fasten the fastening member 40.

Meanwhile, the piping connection method of the present invention may further include an airtight liquid application step, an insertion depth display step, and an insertion position confirmation step.

The airtight liquid application step is performed before the interference fit step and is performed by applying the airtight fluid to the outside of the end portion of the pipe 10 to insert the pipe 10 and the fitting portion 31 when the fitting portion 31 is inserted into the pipe 10, Respectively. The hermetic liquid used here not only hermetically closes the piping 10 and the fitting portion 31 but also can perform a bonding function. At this time, it is preferable that the pipe 10 coated with the airtight fluid is inserted into the fitting portion 31 so that the airtight fluid is evenly applied, and then the pipe 10 and the fitting portion 31 are rotated with respect to each other.

The insertion depth display step is performed before the interference fit step and the pipe 10 is inserted so as to be in close contact with the inner engagement step 33 formed on the inner side of the fitting part 31 and then inserted into the outer peripheral face of the pipe 10 31 to indicate the insertion depth at which the pipe 10 is inserted into the fitting portion 31.

The insertion position confirmation step is performed after the interference fit step and is performed after the tightening member 40 is forcedly inserted into the fitting portion 31 indicated on the outer circumferential surface of the pipe 10 in a state where the pipe 10 and the connecting member 30 are fastened. It is possible to confirm the insertion position of the pipe 10 from the end position of the pipe 10. For example, if the end position indicated on the pipe 10 is the same as the end position of the fitting part 31, it can be confirmed that the pipe 10 has been properly inserted into the fitting part 31 and the end position indicated on the pipe 10 is tightened If it is the same as the position of the rear end of the member 40, it can be confirmed that the tight fitting of the tightening member 40 is completely completed.

FIG. 6 is a cross-sectional view showing a state in which the piping connection device for an air conditioner according to the present invention is fastened by a piping connection method, wherein a part of the inner diameter of the tightening member 40 is smaller than the outer diameter of the fitting portion 31, It is possible to strengthen the fastening force by the minute deformation generated in the fitting portion 31, the pipe 10 and the insertion member 20 in the fitting process.

The pipe 10 is closely attached to the groove portion 31a formed on the inner circumferential surface of the fitting portion 31 and the groove portion 21a formed on the outer circumferential surface of the insertion member 20 so that the coupling force can be further improved.

FIG. 7 shows a piping box equipped with an air conditioner piping connection apparatus according to the present invention, in which a connecting member and a fastening member are fastened to the piping end, and a pressure gauge and a connection pipe are connected to the fastening portion of the connecting member.

While the invention has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Piping
20: insertion member
21:
22:
23: protruding chin
30:
31:
32:
33: inner jaw
34: outer jaw chin
40: fastening member
41:

Claims (11)

1. A pipe connecting apparatus for connecting a pipe (10) used in an air conditioner to a connected body,
An insertion member 20 inserted inside the end portion to support the inner circumferential surface of the pipe 10;
(30) having a fitting part (31) fitted to the outside of the end of the pipe (10) at one side and a coupling part (32) for coupling the connected part at the other side;
Is inserted in the outer side of the fitting part (31) so as to fasten the connecting member (30) with the pipe (10) inserted with the insertion member (20), and at least a part of the inner diameter of the fitting part A tightening member 40 formed to be smaller than the outer diameter; And
And a sealing liquid applied to the outside of the end portion of the pipe (10) so as to seal between the pipe (10) and the fitting portion (31)
The tightening member 40 is formed such that the inner diameter of the front end in the direction of insertion into the fitting portion 31 is larger than the outer diameter of the fitting portion 31 and at least the front portion is formed so that the inner diameter becomes smaller toward the rear end, (31) The pipe (10) and the insertion member (20) are deformed and are pressed into the fitting part (31)
The insertion member 20 has a groove formed along the circumferential direction behind the outer circumferential surface contacting the pipe 10,
The connecting member 30 is formed with a groove portion along the circumferential direction in front of the inner circumferential surface of the fitting portion 31 which is in contact with the pipe 10,
When the tightening member 40 and the fitting portion 31 are coupled to each other, the tilted inner diameter of the tightening member 40 presses the fitting portion 31, and the fitting portion 31, the pipe 10, The insertion member 20 is deformed and fixed, the front outer circumferential surface and the rear inner circumferential surface of the pipe 10 are in close contact with the respective groove portions,
The fitting portion 31 is exposed to the inside of the rear end of the tightening member 40 to confirm the insertion depth of the tightening member 40 in a state where the tightening member 40 and the fitting portion 31 are engaged , And the fitting portion (31) and the tightening member (40) have the same length. The method according to claim 1,
Wherein the inserting member (20) is formed with a protrusion (22) protruding outward at one side thereof so that insertion of the inserting member (20) into the pipe (10) is restricted. delete delete The method according to claim 1,
Characterized in that the connecting member (30) is provided with an inner engaging step (33) for restricting the engaging position of the pipe (10) into which the insertion member (20) is inserted in the inner peripheral surface of the fitting part (31) Pipe connection device. The method according to claim 1,
Wherein the connecting member is formed with an outer hooking protrusion for restricting a coupling position of the fastening member on the outer circumferential surface of the fitting portion. The method according to claim 1,
Wherein the tightening member (40) is formed such that the inner diameter of the middle portion is smaller than the inner diameter of the both side rooms. The method according to claim 1,
Wherein the tightening member (40) is formed to have a smaller inner diameter toward a rear end in a direction of insertion into the fitting portion (31). In the piping connection method using the piping connection apparatus of claim 1,
A piping preparing step of inserting the insertion member 20 into an end of the pipe 10 and providing the tightening member 40 to the outside of the pipe 10;
Fitting a fitting portion (31) of the connecting member (30) to the outside of the end of the pipe (10);
Fitting the tightening member (40) to the outer side of the fitting portion (31) and tightening the pipe (10) and the connecting member (30); And the pipe connection method. 10. The method of claim 9,
Prior to the force fitting step,
Applying a gas-tight liquid to the outside of the end of the pipe (10) so as to close the space between the pipe (10) and the fitting portion (31); Further comprising the steps of: 10. The method of claim 9,
Prior to the force fitting step,
The piping 10 is inserted into the inner engaging step 33 formed on the inner side of the fitting part 31 and the end position of the fitting part 31 is displayed on the outer peripheral surface of the pipe 10, Displaying an insertion depth at which the pipe 10 is inserted into the fitting portion 31; And
After said force fitting step,
An insertion position confirming step of confirming an insertion position of the tubing 10 from an indicated end position when the tubing 10 is inserted into the fitting part 31; Further comprising the steps of:

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