KR101643842B1 - Vending device for refrigerant pipe with capkllary tube - Google Patents

Abstract

The present invention relates to a bending device. The bending device includes a base and a bending mold fixated to the base. The bending mold comprises: a bed fixated to the base where the coolant pipe around which the capillary tube is wound is seated; a protrusion-type bending die protruding from one side of the bed, having an outer circumference where the coolant pipe around which the capillary tube adheres, supporting the adhering part of the coolant pipe when bending the coolant pipe; and a groove sheet composed of escape grooves capable of receiving the capillary tube protruding outward from the coolant pipe. In the present invention, the capillary tube is inserted into the escape groove when bending the coolant pipe. The purpose of the present invention is to provide the bending device for the coolant pipe around which a capillary tube is wound, capable of preventing imbalances in stress when bending the coolant pipe.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bending device for a capillary tube type refrigerant tube,

The present invention relates to a bending machine, and more particularly to a bending machine for bending a capillary tube-wound refrigerant tube.

Generally, a cooling device such as a refrigerator or an air conditioner or a water purifier is provided with a refrigeration cycle for cooling. In a typical refrigeration cycle, the compressor and the condenser are connected by a pipe, the condenser and the evaporator are connected to the capillary through the refrigerant supply pipe, and the evaporator and the compressor are connected to the suction pipe.

In this refrigeration cycle, the high-temperature and high-pressure refrigerant compressed and discharged from the compressor is introduced into the condenser in the form of gas, cooled by the heat radiation of the condenser, discharged again to the capillary for lowering the high pressure of the condenser to low pressure, As shown in FIG.

Here, since the refrigerant passing through the capillary is relatively high, it is preferable to lower the temperature of the refrigerant flowing into the evaporator from the capillary tube so as to improve the cooling performance. To this end, a method is known in which a refrigerant pipe (suction pipe) through which a coolant at a relatively low temperature flows is brought into contact with a capillary. In this method, a capillary tube P2 is attached to the refrigerant tube P1 so that the refrigerant of the refrigerant tube made of copper or aluminum material and the refrigerant of the capillary tube made of the same material are exchanged with each other, The temperature of the refrigerant flowing through the refrigerant pipe P2 is reduced. That is, a heat exchange pipe P having a capillary tube P2 attached to the refrigerant tube P1 is manufactured, and the refrigerant temperature is reduced through heat exchange between the refrigerant tube P1 and the capillary tube P2.

1, the capillary P2 is attached in the shape of a coil as shown in FIG. 1, and then the refrigerant tube P1 is bent at an angle of a desired curvature through the mold 1 as shown in FIG. 2 And is manufactured in a bent state. 2, after the refrigerant tube P1 is seated on the bed 1a of the mold 1, a part of the refrigerant tube P1 is caught in the bending die 1b of the mold 1 as one side is pulled in the direction of the arrow Lt; / RTI >

However, since the coolant pipe P1 is made of a hollow pipe and the capillary tube P2 having a substantially equal thickness is wound around the outer circumferential surface, the capillary tube P2 supported on the bending die 1b The part is pressurized locally by extreme pressure. Particularly, as shown in FIG. 2, the refrigerant pipe P1 is vertically pressed by the capillary P2 because the outer circumferential surface of the cylindrical banding die 1b is vertical. As a result, stress unbalance occurs in the refrigerant pipe P1 due to local pressurization, so that the bending portion P3 where the capillary P2 is located is plastically deformed inward as shown in Fig. Therefore, not only the refrigerant can smoothly flow through the refrigerant pipe P1 due to plastic deformation but also rattle noise is generated due to pulsation noise or pulsation during refrigerant perfusion, and further, The fatigue strength of the portion is lowered, and there is a possibility of rupture at the time of assembling work or operation (refrigerant perfusion), so that a very large quantity is judged to be defective and discarded.

Recently, the capillary tube P2 is wound around the remaining portion without winding the capillary tube P2 around the bending portion P3 of the refrigerant tube P1 to reduce the defective rate. However, in this case, the contact area of the capillary P2 is substantially reduced, which causes a problem that the cooling efficiency is lowered.

KR 20-0386639 (Suction heat exchanger for Kimchi refrigerator)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems, and it is an object of the present invention to provide a capillary tube winding type which can easily bend and accommodate a part of a refrigerant tube or capillary tube corresponding to a bending portion, The object of the present invention is to provide a bending machine for a refrigerant pipe.

In particular, it is possible to accommodate the outer circumferential surface of the refrigerant tube corresponding to the third quadrant or the fourth quadrant formed virtually in the cross section of the refrigerant tube, and furthermore, And it is an object of the present invention to provide a bending machine for a capillary tube type refrigerant tube capable of accommodating the outer circumferential surface of the refrigerant tube to about half.

The mold for supporting the bending portion of the refrigerant tube is divided so that the bending can be performed. If necessary, the capillary tube can be selectively separated from the bending portion, and the divided molds can be easily and integrally combined. Another purpose is to provide a banding machine.

In addition, the mold can be detachably fixed to the fixing member to which the mold is fixed, the mold can be easily moved by the fixing member, and the mold can be fixed rotatably. Is another purpose.

Another object of the present invention is to provide a bending machine for a capillary tube type refrigerant tube capable of bending a plurality of portions of a refrigerant tube by disposing a plurality of dies in a spaced relationship with the above-mentioned fixing member.

According to an aspect of the present invention, And at least one banding mold fixed to the base and bending a refrigerant tube spirally wound around the capillary on the outer surface, wherein the banding mold is fixed to the base, and the refrigerant tube is seated on one side Bed; And an outer peripheral surface of the refrigerant tube, which is in close contact with the outer surface of the refrigerant tube, which is in close contact with the outer surface of the refrigerant tube, And a fitting groove in which a part of the refrigerant tube is fitted so that the refrigerant tube is confined to the outer circumferential surface while the refrigerant tube is in close contact with and bent while the capillary tube protruding outwardly of the refrigerant tube is provided, And a bending die of a protruding shape formed in the same body.
The bending die, but wherein the insertion groove is formed on an outer peripheral surface in the form of parallel to the longitudinal direction of the refrigerant tube, in which the escaping groove is formed on the outer peripheral surface in the fitting groove with a different direction, the escape groove is the And is formed on the outer circumferential surface so as to be inclined with respect to the fitting groove .

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The fitting groove may be formed on an outer circumferential surface of the bending die at an arcuate curvature corresponding to one of quadrants or quadrants in a quadrangle formed virtually in the cross section of the refrigerant pipe.

Alternatively, the fitting groove may be formed on the outer circumferential surface of the bending die at a curvature of a semicircular shape corresponding to the outer diameter of the refrigerant tube, and intersect with the escaping groove.

The banding die needs to be constituted of a plurality of horizontally divided portions along the imaginary center line formed in the fitting groove together with the fitting groove and the escape groove.

The bending die may include, for example, a fixed body integrally formed with the bed, the fixed body having the split fitting groove and a part of the escape groove; And a plurality of recessed grooves which are separated from the fixed body by the horizontal division and have a remaining part of the divided fitting grooves and the escape grooves, body; And a fastener detachably fixing the detachable body to the fixed body.

Preferably, the fastener is composed of, for example, a fastening member which is detachably fastened to the fixed body through the detachable body.

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The base may include a plurality of the banding molds and may be spaced apart from each other.
The bending mold is detachably fixed to the base with a bolt, and the bolt is detachably fixed to the base with one side fixed to the bending mold and the other side fixed to the base .
Wherein the bending mold is mounted on the base rotatably by a bearing, the bearing being mounted on the outside of the bolt such that the bending mold rotates about the bolt, And the mold is rotatably supported.
The base may further include a guide rail formed as a slot so that the other side of the bolt fixed on one side of the banding mold is movable so as to guide movement of the bolt.
The guide rail may further include a step in which an opposite portion of the bearing coupled to the bending mold is inserted and supported.

As described above, since the capillary tube wound around the refrigerant tube is accommodated in the escape groove formed in the bending die, it is possible to prevent the refrigerant tube from being pressurized by the capillary tube during bending, It is possible to prevent local plastic deformation from occurring in the refrigerant pipe. In addition, since a part of the refrigerant pipe is accommodated in the fitting groove, the refrigerant pipe can be stably bent.

Particularly, since the fitting groove is parallel to the refrigerant pipe, the refrigerant pipe can be easily inserted into the fitting groove, and the fitting groove and the escape groove in which the refrigerant pipe and the capillary tube are accommodated can be formed into a straight refrigerant pipe and a shape So that it is possible to easily accommodate the refrigerant tube and the capillary tube during the bending operation and also to accommodate the outer circumferential surface of the refrigerant tube corresponding to the third quadrant or quadrant of the refrigerant tube, The height of the bending die can be reduced. Further, when the fitting groove is formed so as to accommodate the outer circumferential surface of the refrigerant tube to about half, the supporting area of the refrigerant tube supported on the bending die It is possible to easily bend the refrigerant tube.

When the bending die of the bending mold is divided, if necessary, the bending die can be separated from the bending die to completely open one side of the fitting groove. Therefore, the refrigerant tube can be easily removed from the fitting groove, The fixing body can be formed integrally with the bed, so that it is not necessary to manufacture the fixing body separately from the bed, and since the fixing body is coupled to the fixing body through the fastener made of the fastening member, have.

In addition, since the banding mold can be detachably fixed to the base, the banding mold can be easily installed, and furthermore, the bolt for fixing the banding mold can be moved through the slot formed in the base, Further, since the banding mold is rotatably fixed to the base, the refrigerant tube and the capillary tube can be easily inserted into the fitting groove and the escape groove while rotating the banding mold.

In addition, since a plurality of banding molds are installed on the base so as to be spaced apart from each other, the refrigerant pipe can be bent at several points, so that it is possible to bend the refrigerant tube very easily and to shorten the banding time.

1 is a perspective view of a refrigerant tube in which a general capillary tube is wound;
FIG. 2 is a perspective view of a banding mold for bending the refrigerant tube shown in FIG. 1; FIG.
Fig. 3 is a plan view of a refrigerant tube bent by the banding mold shown in Fig. 2; Fig.
4 is a perspective view of a banding mold according to the first embodiment applied to the banding machine of the present invention;
Fig. 5 is a side view of the banding machine shown in Fig. 4; Fig.
FIG. 6 is a plan view of the banding machine shown in FIG. 4;
FIG. 7 is a perspective view of a banding mold according to a second embodiment applied to the banding machine of the present invention; FIG.
FIG. 8 is a plan view of the banding mold shown in FIG. 7; FIG.
FIG. 9 is a side view of a banding machine according to an embodiment of the present invention in which the banding mold shown in FIG. 7 is mounted; FIG.
FIG. 10 is a perspective view showing a part of the base shown in FIG. 9; FIG.
Fig. 11 is a schematic plan view of the banding machine shown in Fig. 9; Fig.
12 is a side view of a banding mold according to a third embodiment applied to the banding machine of the present invention; And
13 is a plan view of the banding mold shown in Fig.

Hereinafter, a bending machine for a capillary tube type refrigerant tube according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The banding machine according to the embodiment of the present invention includes a base T, a banding mold 50, and a groove sheet described later, as shown in Fig. The base T is a structure in which a bending mold 50 is installed as shown in FIG. The base T is made of, for example, a metal or a plastic material, and can be constituted by a plate or block as shown in the figure. The base T is not limited to the above-described table or block, and may be any member provided that the banding mold 50 can be installed.

The banding mold 50 is fixed to the base T as shown and a heat exchange pipe P having a refrigerant pipe P1 spirally wound with a capillary tube P2 on the outer circumferential surface is seated and bent . The banding mold 50 may be provided in the base T as shown in FIG. 1, but may be provided in the base T as shown in FIG. The bending mold 50 may be composed of, for example, a bed 51 and a bending die 53 as shown in Fig.

The bed 51 is seated on one side of the refrigerant tube P1 as shown in Figs. 5 and 6). That is, the bed 51 provides a seating surface 51a on one side of which the refrigerant tube P1 is seated. The bed 51 provides a seating surface having a generally planar surface as shown. The bed 51 is fixed to the base T as shown in Fig. 4, the bed 51 may be formed of a disk-shaped plate material, but may alternatively be formed of a circular or arcuate circular or polygonal (e.g., triangular, rectangular, octagonal, etc.) have.

The banding die 53 is provided on one side of the bed 51 having a seating surface, as shown in Figs. 4 and 5, in a projecting state. The bending die 53 is formed to have a smaller size (diameter or area) than one side of the bed 51 having the seating surface 51a as shown in the figure. The bending die 53 may be formed of a circular protrusion having a concentric circle with the bed 51 as shown in the figure. Alternatively, the banding die 53 may be formed of an arc-shaped protrusion having a semicircular shape or a fan shape. However, the bending die 53 suffices if curvature is formed on the outer circumferential surface of the refrigerant pipe P1, which will be described later, so that the refrigerant pipe P1 can be bent. The bending die 53 may be curved only in a portion where the refrigerant pipe P1 is in contact.

The bending die 53 is preferably protruded from the center of the bed 51 as shown in FIGS. 4 and 5, but it may be eccentrically protruded to one side of the bed 51. The banding die 53 may be manufactured separately from the bed 51 and may be mounted on the bed 51 but is preferably made of the same material as the bed 51 and molded together when the bed 51 is molded .

The bending die 53 may be formed to have a height equal to or slightly lower than a horizontal center line CT formed virtually on the cross section of the refrigerant pipe P1 as shown in FIG. 7, the bending die 53 may be formed to have a height higher than the horizontal center line CT described above, and may have a height corresponding to the diameter of the refrigerant pipe P1 or higher than the diameter . This height is selectively determined according to the material characteristics and the bending characteristics of the refrigerant pipe P1. For example, the banding die 53 can have a relatively low height as shown in FIG. 5 when the material of the refrigerant pipe P1 is soft like copper or has a small bending angle, and the material is stiffer than copper When the bending angle is large, a larger contact area is required, so that the height can be made relatively high as shown in FIG.

As shown in FIGS. 5 and 6, and 7 and 8, the bending die 53 is in close contact with the outer circumferential surface having the curvature of the refrigerant tube P1 wound with the capillary tube P2. The bending die 53 supports the refrigerant pipe P1 on the outer circumferential surface when one side of the refrigerant pipe P1 is pulled and bent as shown in the figure. At this time, the bending die 53 supports the contact area of the refrigerant pipe P1 which is in close contact with the outer peripheral surface, that is, the contact area contacting the outer peripheral surface. Therefore, the bending die 53 smoothly bends the refrigerant pipe P1. Consequently, the bending die 53 is a component that curves the refrigerant tube P1 into a curved line.

5 and 7, the bending die 53 may have a fitting groove G1 of a refrigerant tube holder, which will be described later, formed on the outer circumferential surface. Alternatively, the bending die 53 may have a curved surface As shown in Fig. 5, a protrusion such as a cylindrical shape may be formed. However, the banding die 53 may have the above-described curvature formed on the outer circumferential surface so that the refrigerant pipe P1 can be bent more than the fitting groove G1 is formed.

On the other hand, the groove sheet can be configured as an escape groove G2 as shown in Figs. 4 and 5. 6 and 8, the escape groove G2 is formed on the outer peripheral surface of the bending die 53 so that the capillary P2 wound on the refrigerant tube P1 while the refrigerant tube P1 is bent Accept. 6, the refrigerant pipe P1 is wound around the refrigerant pipe P1 when it is in close contact with the outer circumferential surface of the banding die 53, and the refrigerant pipe P1 protrudes to the outside of the refrigerant pipe P1 And accommodates a part of the capillary P2. The escape groove G2 is formed to have a size corresponding to the outer diameter of the capillary P2 so as to be accommodated therein. The escape groove G2 may be formed in the bed 51 of the above-described banding mold 50 as shown in Figs. 5 and 7. Particularly, the escape groove G2 may be partially formed on the seating surface 51a of the bed 51.

The groove sheet may be formed on the outer peripheral surface of the bending die 53 together with the refrigerant tube holder as shown in Figs. 5 and 7, the refrigerant pipe holder may include a fitting groove G1 formed on the outer peripheral surface of the bending die 53 to receive the refrigerant pipe P1. The fitting groove G1 is formed in the shape of a groove on the outer circumferential surface of the banding die 53 in a form parallel to the longitudinal direction of the refrigerant pipe P1 seated on the bed 51 as shown in Figs. The fitting groove G1 may be formed in the shape of a groove on the outer circumferential surface of the bending die 53 along the circumferential direction of the bending die 53 as shown in the drawing to be substantially parallel to the longitudinal direction of the refrigerant tube P1 . The fitting groove G1 is formed corresponding to the outer diameter of the refrigerant pipe P1 as shown in the figure. 5 and 6, when the refrigerant tube P1 is in close contact with the outer peripheral surface of the banding die 53, the fitting groove G1 can receive a part of the refrigerant tube P1, that is, have.

The fitting groove G1 may be formed in a part of the bed 51 of the banding mold 50 described above. Particularly, the fitting groove G1 may be partially formed on the seating surface 51a of the bed 51. [

The fitting groove G1 is formed at a height approximately equal to half of the diameter of the refrigerant tube P1 as shown in Fig. 5 (equal to or lower than the above-described horizontal center line) as described above Is formed on the outer circumferential surface of the bending die 53 at a curvature corresponding to any one of quadrants or quadrants in a quadrangle formed virtually on the cross section of the refrigerant pipe P1 as shown in the figure. That is, the fitting groove G1 is formed on the outer peripheral surface of the bending die 53 with an arc-shaped curvature R1 corresponding to the lower outer diameter of the refrigerant tube P1 on the side surface. Therefore, the fitting groove G1 can accommodate a part of the lower side of the refrigerant tube P1 that is in close contact with the outer peripheral surface of the bending die 53. [ Therefore, since the fitting groove G1 accommodates about half of the lower side diameter of the refrigerant pipe P1, the refrigerant pipe P1 is restrained at the time of bending to enable stable bending of the refrigerant pipe P1, Thereby preventing escape.

7, when the height of the bending die 53 is formed to be higher than a half of the diameter of the refrigerant pipe P1 (higher than the above-described horizontal center line), the fitting groove G1 is formed, Is formed on the outer circumferential surface of the banding die 53 with semicircular curvatures R1 and R2 corresponding to the outer diameter of the refrigerant tube P1. Therefore, the fitting groove G1 can accommodate about half of the refrigerant tube P1 (about 50% of the outer diameter of the refrigerant tube) closely attached to the outer peripheral surface of the banding die 53. [ As shown in the figure, the fitting groove G1 can be formed with a substantially semi-circular curvature on the side surface so that the outer diameter of the refrigerant tube P1 is limited to about half, but the refrigerant tube P1 is restricted It may be formed into a semi-circular curvature which is not perfect.

The escape groove G2 described above is formed in the refrigerant pipe P1 so that the capillary P2 wound in the refrigerant pipe P1 is accommodated in the escape groove G2 in a direction different from the fitting groove G1 as shown in Fig. And is formed on the outer peripheral surface. The escape groove G2 may be formed on the outer circumferential surface of the banding die 53 so as to be orthogonal to the fitting groove G1 but it is preferable that the escape groove G1 The bending die 53 may be formed on the outer circumferential surface of the bending die 53 in an inclined manner. The escape groove G2 may be formed to have a size slightly larger than or equal to the outer diameter of the capillary P2 so as to smoothly accommodate the capillary P2 as shown in FIG.

The escape grooves G2 are formed in plural as shown in Figs. 4 and 6 and are formed along the circumferential direction of the banding die 53. Fig. At this time, the escape grooves G2 are formed in the bending die 53 at equal distances (for example, 20 mm to 50 mm intervals) at distances corresponding to the pitches of the capillaries P2. However, the escape groove G2 may be formed in the banding die 53 in singular form depending on the bending angle of the refrigerant pipe P1.

6, the escape groove G2 and the above-mentioned fitting groove G1 may be formed only in the banding section A when the banding angle is approximately 90 degrees, as shown in FIG. The escape groove G2 and the fitting groove G1 may be formed only in a half of the outer diameter of the banding die 53 when the banding angle is about 180 degrees. The position of the escape groove G2 and the fitting groove G1 formed on the bending die 53 is determined by the bending section A according to the bending angle. The banding die 53 is formed in an arc shape or a semicircular shape according to the position of the escape groove G2 and the fitting groove G1.

5, when the fitting groove G1 is formed in an arc shape as shown in FIG. 5, only a part of the lower side in the plane is accommodated in the fitting groove, as shown in FIG. 6, As shown in FIG. 8, when the fitting groove G1 is formed in a semicircular shape, almost half of the fitting groove G1 is inserted in the fitting groove G1. At this time, as shown in FIG. 6 and FIG. 8, a part of the capillary P 2 located outside the refrigerant pipe P 1 is inserted into the escape groove G 2.

On the other hand, the banding mold 50 can be detachably fixed to the base T as shown in Fig. The banding mold 50 may be detachably fixed to the base T via a bolt 55 as shown. One side of the bolt 55 is inserted into the banding mold 50 and the other side of the bolt 55 is detachably fixed to the base T as the nut N passes through the base T. 9, one end of the bolt 55 passes through the banding mold 50 and is fixed to the nut N. The other end of the bolt 55 passes through the base T and the nut N is fastened And may be detachably fixed to the base T. In this case, the bolt 55 can be inserted into the hole formed in the banding mold 50 without being inserted into the banding mold 50, so that the insert process can be omitted at the time of molding the banding mold 50. However, the banding mold 50 is not limited to being fixed by the bolts 55, and any member that can be permanently or removably fixed to the base T (for example, a jig or a bracket) can be used Do.

The banding mold 50 is preferably rotatably fixed to the base T. The banding mold 50 may be mounted on the lower surface facing the base T as shown in Fig. 9 and may be rotatably fixed by a bearing BR which is partly supported or fixed to the base T . The bearings BR may be partly attached to the banding mold 50 and part of the opposite side may be installed on the base T so as to be rotatably supported. At this time, a part of the bearing BR may be inserted into the base T and supported or fixed to the base T as shown in the figure. However, the banding mold 50 may be configured to be rotated around the bolt 55 by the bolts 55 described above. That is, the bending mold 50 may be rotated about the bolt 55 as the bearing BR is fixed to the outside of the bolt 55 as shown in FIG. 9, And may be rotated about the bolt 55 in the case of a strut bearing.

The base T may be formed with a guide rail Ta having a long hole shape for moving the bolt 55 as shown in FIG. It is preferable that the guide rail Ta is formed with the step ST as illustrated so that at least a part of the bearing BR described above , that is , a part opposite to the bearing BR described above is inserted and supported. The guide rail Ta can guide the movement of the bolt 55 as the other side of the bolt 55 having one side fixed to the banding mold 50 penetrates as shown in FIG.

The plurality of banding molds 50, 50a, 50b and 50c may be spaced apart from each other, as shown in FIG. 11, so that the base T can be bent at several points of the refrigerant pipe P1. At this time, the base (T) can be provided with the banding molds (50) in which the banding dies (53) are formed at various diameters according to the bending angle of the refrigerant pipe (P1). Accordingly, the refrigerant pipe P1 can be bent at various angles, such as approximately 90 degrees or 180 degrees (see enlargement), as shown through the plurality of banding molds 50. [

In this case, the refrigerant pipe P1 is easily detached from the fitting groove G1 when the banding mold 50 is lower in height than the horizontal center line CT as shown in Fig. However, the refrigerant pipe P1 can not be separated from the fitting groove G1 when the banding mold 50 is higher than the horizontal center line CT as shown in Fig. 11, the refrigerant pipe P1 can not be removed from any one of the bending molds 50 because the bending angles of the bending molds 50 are different from each other, (50), the bending is completed. However, when the fitting groove G1 is formed in a semicircular shape as shown in FIG. 7, the upper portion of the fitting groove G1 is caught in the refrigerant pipe P1, so that it is virtually impossible to remove the refrigerant pipe P1.

Therefore, the bending die 53 may be divided into a plurality of bending dies as shown in Fig. This banding die 53 is arranged at the center of the imaginary center line CT formed in the fitting groove G1 as shown in Fig. 12 (a) It is preferably horizontally divided along the fitting groove (G1) and the escape groove (G2) around the center (CT).

When the banding die 53 is divided as described above, it is preferable that the banding die 53 is manufactured as shown in FIG. 7 for the sake of convenience in manufacturing, and is horizontally divided about the center line CT described above. That is, the bending die 53 is formed by cutting the bending mold 50 around the above-mentioned center line CT after completion of manufacturing the bending mold 50 having the semicircular fitting groove G1 and the escape groove G2. As shown in FIG. However, when the banding die 53 is formed separately from the bed 51, the fitting groove G1 and the escape groove G2 are formed in a perfect shape on the outer circumferential surface, and after the center line CT is cut off It may be divided horizontally.

The bending die 53 is divided into a fixed body 53b and a detachable body 53a as shown in Fig. The fixed body 53b is integrally formed with the bed 51 as shown in the figure and has a split fitting groove G1 and an escape groove G2. That is, the bending die 53 has a part of the fitting groove G1 and the escaping groove G2. Then, the attaching / detaching body 53a has the remaining fitting groove G1 and the escaping groove G2, which are divided as shown by the dividing. The detachable body 53a is coupled to the fixed body 53b through the fastener as shown in Fig. At this time, the attaching / detaching body 53a integrally connects a part of the fitting groove G1 and the part of the escaping groove G2, which have been divided at the time of fitting, and the remaining part.

Meanwhile, the above-mentioned fastener detachably fixes the detachable body 53a to the fixed body 53b, and separates the detachable body 53a from the fixed body 53b, if necessary. 11, the refrigerant pipe P1 is easily detached from the banding mold 50 as the detachable body 53a is separated from the fixed body 53b.

The fastener may be a fastening member K that is detachably fastened to the fixed body 53b through a detachable body 53a through a key groove Kh formed in the banding mold 50 as shown in FIG. Can be configured. It is preferable that the fastening member K is constituted by a conventional key which is fastened to the attaching / detaching body 53a or the fixed body 53b and is key-engaged or splined. These fastening members K are composed of a plurality of fastening members K as shown in FIG. 12 and are fastened to the attaching / detaching body 53a and the fastening body 53b while facing each other as shown in FIG. Therefore, even when the attaching / detaching body 53a is coupled to the fixed body 53b, rotation of the attaching / detaching body 53a is prevented by the plurality of fastening members K.

Hereinafter, the operation of the banding machine according to the embodiment of the present invention will be described with reference to the accompanying drawings.

5, the refrigerant tube P1 in which the capillary tube P2 is wound is seated on the bed 51 and is brought into close contact with the outer peripheral surface of the bending die 53. As shown in Fig. At this time, the banding mold 50 accommodates a part of the refrigerant tube P1 and the capillary tube P2 through the fitting groove G1 and the escape groove G2 formed on the outer peripheral surface of the banding die 53. 6, the bending die 53 is connected to the refrigerant pipe (not shown) through an outer circumferential surface having no escape groove G2 while the refrigerant pipe P1 is being bent, that is, when one side of the refrigerant pipe P1, P1). Accordingly, the refrigerant pipe P1 is bent as shown in Fig. 6, and then the upper side or the side of the bending die 53 is removed. The refrigerant tube P1 is prevented from being pressurized by the capillary tube P2 as the capillary tube P2 is inserted into the escape groove G2 and stress unbalance as in the prior art is not generated during bending, It does not collapse.

The banding mold 50 can bend the refrigerant pipe P1 only at an approximately acute angle when the fitting groove G1 of the banding die 53 is formed in a semicircular shape as shown in FIG. If the refrigerant tube P1 is bent at an oblique angle as shown in the enlarged view in FIG. 11, the refrigerant tube P1 may not be separated from the upper portion of the fitting groove G1. In particular, as shown in FIG. 11, the banding mold 50 is composed of a plurality of bending molds 50, so that when the refrigerant pipe P1 is bent at several points together, the refrigerant tube P1 can not be further released from the fitting groove G1. However, when the bending mold 50 is bent at an obtuse angle to any one of the refrigerant pipes P1, the refrigerant pipe P1 can be released to the side of the bending die 53 as shown by arrows in Fig.

On the other hand, as shown in FIG. 11, when several points of the refrigerant pipe P1 are bended together, the base T is mounted with a plurality of the banding molds 50 being spaced apart from each other. At this time, the base T is mounted with the divided banding mold 50 as shown in FIG. 12 (b), after the respective portions of the refrigerant tube P1 are bent, the attaching / detaching body 53a is fastened to the fastening body K through the fastening member K of the fastener, (53b). Therefore, the refrigerant tube P1 is easily detached from the banding mold 50 as the upper side of the fitting groove G1 is removed by removing the attaching / detaching body 53a.

The banding mold 50 is coupled to the fixed body 53b by the fastening member K again after the refrigerant tube P1 is removed. Therefore, the banding mold 50 can bend another refrigerant pipe P1. When the attaching / detaching body 53a is coupled to the fixed body 53b by a plurality of fastening members K, the banding mold 50 is easily rotated by the fastening member K during bending because the attaching / detaching body 53a is not rotated The refrigerant pipe P1 is bent.

The plurality of banding molds 50 described above can easily be changed to a desired position when the guide rail Ta having the elongated shape is provided on the base T as shown in FIG. . At this time, since the bolt 55 passing through the base T moves along the guide rail Ta as shown in FIG. 9, the position of the banding mold 50 can be changed. Therefore, the banding mold 50 can bend the set portion of the refrigerant tube P1 at the variable position.

The banding mold 50 can be separated from the base T or mounted on another base T since the banding mold 50 can be detached from the base T when the bolts 55 are loosened. Accordingly, the base T can be selectively mounted on the banding mold 50 having various sizes and shapes as needed.

On the other hand, when the banding mold 50 is configured to be rotatable as shown in FIG. 11, the banding mold 50 rotates when the refrigerant pipe P1 is closely attached or when the banding is performed. Thus, the banding mold 50 is easily inserted into the escape groove G2 of the banding die 53 by the capillary tube P2 wound around the refrigerant tube P1. If the banding mold 50 is not rotated, the capillary P2 must be inserted into the escaping groove G2 by the operator. However, the capillary P2 is inserted into the escape groove G2 by itself only by pushing the refrigerant tube P1 into the fitting groove G1 of the banding die 53 when the banding mold 50 is rotated. At this time, the banding mold 50 slightly rotates to correspond the escape groove G2 to the position of the capillary P2, thereby inserting the capillary P2 into the escape groove G2.

On the other hand, depending on the material of the refrigerant pipe P1, the bending angle, or the contact area required for bending, the banding die 50 may be used as shown in Fig. 5, As shown in the drawing, the banding die 53 having a high height is used.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the present invention and are not intended to limit the scope of the present invention. Change, partial omission, or supplement). In addition, the above-described embodiments may combine some or many of the features with each other. Therefore, the structure and configuration of each component shown in the embodiments of the present invention can be implemented by modifications or combinations, and it goes without saying that modifications and combinations of these structures and configurations fall within the scope of the appended claims of the present invention.

50, 50a, 50b, 50c: a banding mold 51:
51a: seat surface 53: banding die
53a: detachable body 53b: fixed body
55: Bolt CT: Center line
G1: Fitting groove G2: Escape groove
K: fastening member N: nut
P: Heat exchange tube P1: Refrigerant tube
P2: capillary ST: step
T: Base Ta: Guide rail

Claims (7)

A base for making donations; And
And at least one banding mold fixed to the base and bending a coolant tube spirally wound on the outer circumferential surface of the capillary,
The banding mold comprises:
A bed fixed to the base, the refrigerant tube being seated on one side; And
A capillary tube having a capillary tube wound around the outer circumferential surface of the capillary tube, the capillary tube being in close contact with the outer circumferential surface of the capillary tube, An escape groove for accommodating the capillary protruded outward of the refrigerant pipe so that the refrigerant pipe can be closely contacted and a fitting groove in which a part of the refrigerant pipe is fitted so that the refrigerant pipe is constrained to the outer circumferential surface while the refrigerant pipe is closely contacted and bent, And a bending die of a protruding type formed individually of the same body,
Wherein the escape groove of the banding die comprises:
The capillary tube being configured to receive the capillary while the refrigerant tube is being bent while being supported by the bending die to prevent a portion of the refrigerant tube from being pressed by the capillary tube,
Wherein the banding die comprises:
The fitting groove is formed on the outer circumferential surface in a shape parallel to the longitudinal direction of the refrigerant pipe,
And the escape groove is formed on the outer circumferential surface in a direction different from the fitting groove ,
Wherein the escape groove is formed on the outer circumferential surface in such a manner that the escape groove intersects the inclined groove with respect to the fitting groove ,
The banding mold comprises:
Wherein the base is detachably fixed to the base by bolts,
The bolt
Wherein the banding mold is detachably fixed to the base as one side is fixed to the banding mold and the other side is fixed to the base,
The banding mold comprises:
A base rotatably mounted on the base,
The bearing
Wherein the banding mold is installed outside the bolt so as to rotate about the bolt and the banding mold is rotatably supported as a part of the banding mold is coupled to the banding mold,
The base includes:
And a guide rail formed as a slot so that the other side of the bolt fixed on one side of the banding mold is movable so as to guide the movement of the bolt . delete delete The apparatus of claim 1 ,
Wherein the fitting groove is formed on an outer circumferential surface at a curvature of a semicircular shape corresponding to an outer diameter of the refrigerant tube so as to intersect the escaping groove . A base for making donations; And
And at least one banding mold fixed to the base and bending a coolant tube spirally wound on the outer circumferential surface of the capillary,
The banding mold comprises:
A bed fixed to the base, the refrigerant tube being seated on one side; And
A capillary tube having a capillary tube wound around the outer circumferential surface of the capillary tube, the capillary tube being in close contact with the outer circumferential surface of the capillary tube, An escape groove for accommodating the capillary protruded outward of the refrigerant pipe so that the refrigerant pipe can be closely contacted and a fitting groove in which a part of the refrigerant pipe is fitted so that the refrigerant pipe is constrained to the outer circumferential surface while the refrigerant pipe is closely contacted and bent, And a bending die of a protruding type formed individually of the same body,
Wherein the escape groove of the banding die comprises:
The capillary tube being configured to receive the capillary while the refrigerant tube is being bent while being supported by the bending die to prevent a portion of the refrigerant tube from being pressed by the capillary tube,
Wherein the banding die comprises:
The fitting groove is formed on the outer circumferential surface in a shape parallel to the longitudinal direction of the refrigerant pipe,
And the escape groove is formed on the outer circumferential surface in a direction different from the fitting groove ,
Wherein the escape groove is formed on the outer circumferential surface in such a manner that the escape groove intersects the inclined groove with respect to the fitting groove ,
Wherein the banding die comprises:
And a plurality of horizontally-divided portions are formed along the imaginary center line formed in the fitting groove with the fitting groove and the escape groove.
Wherein the banding die comprises:
A fixed body integrally formed with the bed, the fixed body having the split fitting groove and a part of the escape groove;
And a plurality of recessed grooves which are separated from the fixed body by the horizontal division and have a remaining part of the divided fitting grooves and the escape grooves, body; And
And a fastener detachably fixing the detachable body to the fixed body,
The banding mold comprises:
Wherein the base is detachably fixed to the base by bolts,
The bolt
Wherein the banding mold is detachably fixed to the base as one side is fixed to the banding mold and the other side is fixed to the base,
The banding mold comprises:
A base rotatably mounted on the base,
The bearing
Wherein the banding mold is installed outside the bolt so as to rotate about the bolt and the banding mold is rotatably supported as a part of the banding mold is coupled to the banding mold,
The base includes:
And a guide rail formed as a slot so that the other side of the bolt fixed on one side of the banding mold is movable so as to guide the movement of the bolt . delete 6. The fastener according to claim 5 ,
And a fastening member which is detachably fastened to the fixed body through the detachable body.

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