KR101323254B1 - L type turn-fin tube having radial protrusions - Google Patents

Abstract

PURPOSE: An L-shaped turn fin tube with a radially protruding structure is provided to increase a contact area between an L-shaped turn fin and outside air and improve heat exchanging efficiency by forming radial protrusions on the surface of the L-shaped turn fin. CONSTITUTION: An L-shaped turn fin tube with a radially protruding structure comprises a tube (100) to allow refrigerant to flow through and an L-shaped turn fin to be radially wound on the outer surface of the tube. The L-shaped turn fin includes a fin part (210) and a base part. The base part is wound on the outer circumference of the tube in the longitudinal direction of the tube. The surface of the fin part is radially formed with protrusions (230). The outer circumference of the tube is formed with a spiral groove which is settled with the base part. The protrusions are formed on the fin part about the entire height of the L-shaped turn fin. The width of protrusions increases or is uniform towards the radial outer side of the L-shaped turn fin. The protrusion is formed with a groove part which is perpendicular to the length of the protrusion in the longitudinal direction of the protrusion. A concave part and a convex part are alternately formed on the circumference of the L-shaped turn fin. The surface roughness of the concave and convex parts is selectively adjusted.

Description

L-TYPE TURN-FIN TUBE HAVING RADIAL PROTRUSIONS}

The present invention relates to an el-shaped turnpin tube, and more particularly, to an el-type turnpin tube having a radial protrusion structure in which a radial protrusion is formed on a surface of the el-turn turnpin tube.

Generally, a refrigeration system is a system in which refrigerant is circulated to a compressor, a condenser, an expansion valve, and an evaporator, and absorbs heat from the room and releases it to the outside. The condenser and the evaporator applied to such a refrigeration system are called heat exchangers.

The heat exchanger is a heat exchange between the refrigerant flowing inside the tube and the air present in the outside of the tube.

On the other hand, in the case of the condenser, by dissipating the heat of the high-temperature, high-pressure gaseous refrigerant discharged from the compressor to a fluid such as air, the state of the condenser is changed into a liquid refrigerant of normal temperature and high pressure, which is easy to evaporate.

Such a condenser may be divided into a wire type condenser and a turn-fin type condenser according to its shape.

Here, the turn-pin condenser has a turn-pin tube, the turn-pin tube is composed of a refrigerant pipe in which the refrigerant flows to the inside, and a turn-pin (turn-fin) coupled to the outside of the refrigerant tube to increase the heat exchange area with the outside air and the like.

Such a turn pin also has an L-type turn pin having a cross-sectional shape in the longitudinal direction of "L", and a turn pin tube having an el-shaped turn pin is manufactured by various methods.

On the other hand, the condenser affects the performance of the refrigerating device, noise reduction, and the like. In particular, the condenser prevents excessive rise of the discharge gas temperature of the compressor, thereby preventing the performance of the freezing device from being lowered, and the heat exchange efficiency is increased. compact configuration is required.

Therefore, in order to reduce the volume of the condenser, the refrigerant pipe may be manufactured to a small diameter, but when the small diameter refrigerant tube is used, it is difficult for the el-type turn pin to be wound around the refrigerant tube, and the shape of the el-type turn pin wound around the refrigerant tube may be satisfactory. Difficult to manage

Therefore, the contact state between the refrigerant tube and the el-turned turn pin is poor and the heat transfer rate is reduced, thereby degrading heat exchange performance.

In order to solve the above problems, the technical problem to be achieved by the present invention is to provide an el-type turnpin tube having a radial protrusion structure that can provide excellent adhesion to small diameter tube, and also improve heat exchange.

In order to achieve the above object, an embodiment of the present invention is a tube in which the refrigerant moves to the inside; And an el (L) type turn pin wound spirally on an outer surface of the tube, wherein the el type turn pin comprises a pin portion and a base portion, and the base portion of the el type turn pin is formed along the length direction of the tube. The spirally wound around the outer circumferential surface of the tube, to provide an el-shaped turn pin tube characterized in that a radial projection formed on the surface of the fin portion of the el-shaped turn pin.

Here, in one embodiment of the present invention, the protrusion and the recess may be alternately formed along the circumferential direction of the el-type turn pin.

In addition, in one embodiment of the present invention, the protrusion may be formed on one surface or both surfaces of the el-shaped turn pin.

In addition, in one embodiment of the present invention, the outer shape of the el-type turn pin may be made in a square or circular shape.

On the other hand, in one embodiment of the present invention, the outer peripheral surface of the tube is formed with a spiral groove (groove), the groove may be made so that the el-shaped turn pin is seated and supported.

Here, in one embodiment of the present invention, the cut portion may be formed in the inward direction from the outer end of the el-shaped turn pin.

And, in one embodiment of the present invention, the protrusion may be formed with respect to the entire height (h) of the el-shaped turn pin.

In addition, in one embodiment of the present invention, the protrusion may be formed with a groove.

On the other hand, in one embodiment of the present invention, surface roughness adjustment may be made to the recess.

In addition, in one embodiment of the present invention, the tube and the el-type turn pin may be made of steel.

Referring to the effect of the el-type turnpin tube having a radial protrusion structure according to the present invention described above are as follows.

First, according to the present invention, as the projection is formed radially on the surface of the el-type turn pin, the contact area of the el-type turn pin is widened to increase the heat exchange efficiency.

At this time, a plurality of protrusions are formed on one surface or both surfaces of the el-type turn pin to widen the contact area between the el-type turn pin and the outside air.

Second, according to the present invention, as the protrusion is formed on the surface of the el-type turn pin during the manufacture of the turn-pin tube, the el-type turn pin coupled to the tube is prevented from slipping. Thus, the tube and the el-shaped turn pin can be made a stable coupling.

Third, according to the present invention, the radially protruding portion is formed on the surface of the el-type turn pin, when the production or transport of the el-type turn pin tube, the user's hand is not beige on the el-type turn pin tube can be improved in the safety of the work.

And, the radially outer end of the el-shaped turn pin is a square (角形) or a circular shape, when the angle is made of a user's hand is not beige, it is possible to increase the safety.

Fourth, according to the present invention, an incision is formed on the surface of the el-type turn pin to generate vortex in the air passing through the el-type turn pin to promote heat exchange between the air and the el-type turn pin.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is a perspective view of an el-shaped turnpin tube according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of the el-shaped turnpin tube according to an embodiment of the present invention.
Figure 3 is a cross-sectional view of the el-shaped turnpin tube according to another embodiment of the present invention.
Figure 4 is a schematic front view of an el-shaped turn pin according to an embodiment of the present invention.
5 is a cross-sectional view taken along line II of FIG. 4.
Figure 6 is a cross-sectional view of the el-shaped turn pin according to another embodiment of the present invention.
Figure 7 is a cross-sectional view of the el-shaped turn pin according to another embodiment of the present invention.
FIG. 8 is a cross-sectional view illustrating a groove formed in a protrusion part along line II of FIG. 4.
9 is an exemplary view showing various types of protrusions according to another embodiment of the present invention.
10 is a partially enlarged view illustrating an el type turn pin having an incision formed according to another exemplary embodiment of the present invention.
11 is a cross-sectional photograph of an el-shaped turnpin tube according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

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

1 is a perspective view of an el-type turnpin tube according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the el-type turnpin tube according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the el-turned turn pin tube 1000 may include an inner tube 100 and an el-turned turn pin 200 outside the tube 100.

Here, the refrigerant may move inside the tube 100, and the tube 100 may be made of a metal material such as steel having excellent heat exchange efficiency.

El-type turn pin 200 is composed of a pin portion 210 and the base portion 220, the cross-section of the el-type turn pin 200 is to form a substantially "L" shape. The base portion 220 of the el-type turn pin 200 is spirally wound around the outer circumferential surface of the tube 100 along the length direction of the tube 100, and the el-type turn pin 200 is made of metal such as steel having excellent heat exchange efficiency. It may be made of a material.

As such, the el-turned turn pin tube 1000 is heat-exchanged with the refrigerant flowing inside the tube 100 and air existing outside the tube 100, and the el-turned turn pin 200 spirals on the outer circumferential surface of the tube 100. It is made to be wound to increase the heat exchange efficiency of the refrigerant flowing through the inside of the tube 100 and the outside air.

Figure 3 is a cross-sectional view of the el-shaped turnpin tube according to another embodiment of the present invention.

As shown in FIG. 3, a groove 110 may be formed in the tube 100. In the groove 110, the el type turn pin 200 is seated on the tube 100, so that the tube 100 and the el type turn pin 200 are stablely coupled.

For example, the groove 110 formed in the tube 100 is spirally formed in the tube 100 before coupling the tube 100 and the el type turn pin 200, and the el type turn pin is formed in the groove 110 formed in the tube 100. The base portion 220 of the 200 is seated and inserted so that the tube 100 and the el-turned turn pin 200 may be coupled.

Alternatively, in the manufacture of the el-shaped turn pin tube 1000, while rotating the base portion 220 of the el-shaped turn pin 200 on the surface of the tube 100, at the same time the el-shaped turn pin 200 of the tube 100 By pressing inwardly to form the groove 110 in the tube 100, the tube 100 and the el-turned pin 200 may be combined.

As such, in the coupling between the tube 100 and the el-turned pin 200, as the groove 110 is formed in the tube 100, the tube 100 and the el-turned pin 200 have increased adhesion and tight coupling. Can be done.

4 is a schematic front view of an el-type turn pin according to an exemplary embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line II of FIG. 4.

As shown in FIGS. 4 and 5, the protrusions 230 are radially formed on the surface of the el-type turn pin 200.

As shown in FIG. 5, the protrusion 230 may be formed only on one surface of the el-turned pin 200. Alternatively, the protrusion 230 may be formed on both surfaces of the el-turned pin 200 as illustrated in FIG. 6. It is possible.

As another embodiment, as shown in FIG. 7, protrusions 230 are formed on both surfaces of the el-type turn pin 200, and the protrusions 230 may be disposed to alternate with each other in the circumferential direction.

The protrusion 230 may be formed with respect to the entire height h of the el-turned pin 200 (see FIG. 2). Here, the height of the el-shaped turn pin 200 may be from the point where the el-shaped turn pin 200 and the tube 100 abuts from the end point of the radially opposite of the el-shaped turn pin 200.

As such, since the protrusion 230 may be formed to have the same height (h, see FIG. 2) of the el-type turn pin 200, the heat exchange efficiency of the el-type turn pin tube 1000 may be increased by increasing the contact area of the el-type turn pin 200. Can be.

In this way, by forming the protrusion 230 on the surface of the el-shaped turn pin 200, the radiation area is widened to increase the heat exchange efficiency. In addition, the protrusion 230 does not cause a slip phenomenon along the circumferential direction during manufacture of the L-shaped turnpin tube 1000, thereby increasing process efficiency and reducing cost. In addition, the user's hand is no longer cut when using the EL type turnpin tube 1000, such as during manufacture or transportation, thereby increasing safety.

As shown in FIG. 4, the surface of the el-turned pin 200 may be provided with a plurality of radially formed protrusions 230 along the circumferential direction. That is, the ellipsoidal turn pin 200 may be viewed as a shape in which the protrusion 230 and the concave portion (that is, the pin portion of the el-type turn pin in which the protrusion is not formed) are alternately formed. The height, thickness, spacing (pitch), and shape of the protrusion 230 may be appropriately selected in consideration of the use place, cooling efficiency, etc. of the L-shaped turnpin tube 1000.

The thickness of the protrusion 230 may be 0.3 mm, for example, and the thickness of the recess may be 0.2 mm, for example.

In FIG. 4, the protrusion 230 formed on the surface of the el-type turn pin 200 has a shape in which the width thereof becomes wider toward the outer side in the radial direction, that is, a fan or triangle shape, but has a constant width in the radial direction outward. It is also possible to be provided in a shape.

As shown in FIG. 4, the radially outer end of the el-turned turn pin 200 may be formed to have a square shape, or alternatively, may be formed to have a circular shape.

In FIG. 4, the protrusion 230 is formed over the entire radial direction of the el-type turn pin 200, but alternatively, the protrusion 230 may be formed only in a radial portion of the el-type turn pin 200.

8 is a cross-sectional view illustrating a groove formed in the protrusion along the line II of FIG. 4, and the groove 231 may be formed along the longitudinal direction of the protrusion 230, and is perpendicular to the longitudinal direction of the protrusion 230. In some embodiments, the protrusion 230 may have a groove 231 formed in various shapes.

In FIG. 8, the groove 231 is formed along the longitudinal direction of the protrusion 230, and the groove 231 may increase the heat exchange efficiency of the el-turned fin tube 1000 by increasing the contact area of the protrusion 230.

Here, the cross-sectional shape of the groove 231 formed in the protrusion 230 may form a variety of shapes, such as semicircles, ellipses, triangles, squares.

The protrusion 230 having the groove 231 formed therein prevents the user's hand from being cut onto the L-turn pin tube 1000 by preventing the user's hand from slipping when using the EL type turn pin 200 or the like. Can increase.

Here, the grooves 231 may be formed in all the protrusions 230, the protrusions 230 in which the grooves 231 are formed and the protrusions 230 in which the grooves 231 are not formed may be alternately repeated. The protrusion 230 in which the groove 231 is formed may be formed in various forms, such as being selectively formed on only one side of the one surface or the other surface of the L-turn pin 200.

In addition, the surface roughness may be adjusted to the recess, and the surface roughness may be processed by sand blasting, and in addition, the surface roughness may be concave through various methods such as grid blasting or shot peening. The negative surface roughness can be adjusted.

By adjusting the surface roughness of the recess, the surface of the recess is roughened, thereby increasing contact with air, thereby increasing heat exchange efficiency. Such surface roughness adjustment may also be applied to the protrusion 230.

That is, the surface roughness adjustment may be selectively performed on the protrusions 230 in which the recesses and the grooves 231 are not formed, and the protrusions 230 in which the grooves 231 are formed. It prevents slipping and increases safety of work.

9 is an exemplary view showing various types of protrusions according to another embodiment of the present invention, the protrusions 230 may be formed radially in various forms on the el-shaped turn pin 200.

For example, the protrusion 230 may be formed only from a radially inner end of the el-turned pin 200 to a predetermined length, i.e., up to one region inside the surface of the el-turned pin 200 (FIG. 9A).

Alternatively, it is also possible to form the protrusion 230 from one region inside the surface of the el-shaped turn pin 200 to the radially outer end portion (FIG. 9B).

As another example, the protrusion 230 may have a shape having a constant width up to a predetermined length in the radial direction, and have a shape in which the width thereof becomes wider from the radial direction to the radial end. (FIG. 9C)

Alternatively, the protrusion 230 may be formed only up to one region within the surface of the el-turned pin 200, and may be spaced apart from one region within the surface of the el-turned pin 200 to the radially outer end thereof. It is also possible to form (Fig. 9D).

In addition, the protrusion 230 may be formed radially by a predetermined distance from one region inside the surface of the el-type turn pin 200. (FIG. 9E) In addition, the protrusion 230 may be formed in the radial direction of the el-type turn pin 200. It may be formed in a zigzag pattern (Fig. 9F).

The protrusion 230 may have a constant width from the inside of the el-turned pin 200 toward the outside in the radial direction (FIG. 9G), and the protrusion 230 may have various shapes and increase the contact area with air. . The protrusion 230 is not limited to the form illustrated in FIG. 9 and may be formed in various forms.

As such, the protrusion 230 is formed to protrude from the fin part 210 in various positions and shapes, thereby increasing the heat exchange area of the el-shaped turn pin 200 to increase the heat exchange efficiency between the refrigerant flowing inside the tube 100 and the outside air. Let's go.

On the other hand, the height, thickness, spacing and shape of the protrusions 230 formed on both surfaces of the el-shaped turn pin 200 may be different from each other.

10 is a partially enlarged view showing an el-shaped turn pin having an incision formed according to another embodiment of the present invention. It is also possible to form the incision 211 inward from the radial end of the el-shaped turn pin 200.

The cutout 211 may be formed in parallel with the protruding portion 230 formed on the surface of the el-type turn pin 200, or may be formed to be in contact with the protruding portion 230 on the surface of the el-type turn pin 200. It is possible.

As the cut-out portion 211 is formed in the el-type turn pin 200 as described above, the cut-out portion 211 generates a vortex in the air passing through the el-shaped turn pin 200. That is, the cutout 211 is to change the air flow passing through a constant to promote the heat exchange between the air and the el-shaped turn pin 200.

11 is a cross-sectional photograph of an el-shaped turnpin tube according to an embodiment of the present invention.

Conventionally, when using steel, it was possible to wind and form steel turn pins only in large diameter tubes, for example, tubes having a large diameter of 20 mm or more.

However, by adopting the same configuration as the embodiment of the present invention, for example, a steel turn pin can be wound around a tube of less than 20 mm, and can be used for a small diameter tube. For example, it is possible to wind and form a steel turn pin even in a tube 100 having a small diameter of 4.76 mm. That is, it can provide the outstanding adhesiveness also to the small diameter tube 100, and can also improve heat exchange property.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: tube 110: groove
200: L type turn pin 210: pin part
211: incision 220: base
230: protrusion 1000: el-shaped turnpin tube

Claims (5)

A tube through which the refrigerant moves; And
An el-shaped turnpin tube comprising an el (L) type turnpin wound spirally on the outer surface of the tube,
The el-type turn pin is composed of a pin portion and a base portion,
The base portion of the el-shaped turn pin is spirally wound on the outer peripheral surface of the tube along the longitudinal direction of the tube,
Radial protrusions are formed on the surface of the fin portion of the el-shaped turn pin,
A spiral groove (groove) is formed on the outer circumferential surface of the tube, and the base portion of the el-type turn pin is seated and inserted into the groove.
Protrusions formed on the pin portion of the el-shaped turn pin is formed with respect to the entire height (h) of the el-shaped turn pin, the protrusion has a constant width in the shape or the radially outer side that the width becomes wider toward the radially outer side of the el-shaped turn pin It is provided in a shape,
The protrusion is formed with a groove along the longitudinal direction of the protrusion or in a direction perpendicular to the longitudinal direction of the protrusion,
The protrusion and the concave portion are alternately formed along the circumferential direction of the el-type turn pin, and the elliptic turn pin tube, characterized in that the surface roughness is selectively adjusted to the concave portion and the protrusion of the el-type turn pin. The method of claim 1,
The protrusion is an el-shaped turnpin tube, characterized in that formed on one surface or both surfaces of the el-shaped turn pin. The method of claim 1,
The shape of the el-shaped turn pin is an el-shaped turn pin tube made of a square (角形) or circular. The method of claim 1,
El-shaped turn pin tube formed with an incision in the inward direction from the outer end of the el-shaped turn pin. The method of claim 1,
The tube and the el-shaped turn pin is an el-shaped turn pin tube made of steel (steel).

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