KR20020069728A - Tube of Condensor for Automobile - Google Patents

Abstract

PURPOSE: A condenser tube for a vehicle is provided to enhance heat transfer efficiency by increasing the contact area of a refrigerant path and to reduce the production cost by reducing the size of a condenser and a tube. CONSTITUTION: A condenser tube(100) forces a heat exchange fluid to introduce in a flow path(111). The heat exchange fluid exchanges heat with the external air. Plural inward protrusions(112,113) are protruded onto the wall surface of the flow path. The sectional shape of the flow path of the tube is rectangular. The inward protrusions are upright vertical to the inner face of the flow path. The height of the tube is lower than 2.0mm. The thickness of the protrusions is less than 0.2mm.

Description

Automotive Condenser Tubes {Tube of Condensor for Automobile}

The present invention relates to an automobile condenser tube used as a heat exchange means in an air conditioner or a cooling device, and in particular, an inward protrusion is formed to increase the contact area of the heat exchange fluid (refrigerant) flowing into the condenser to improve heat transfer efficiency. An extruded tube of a high efficiency condenser.

1 is a schematic diagram of a general automotive capacitor.

As shown, a plurality of tubes (2) are assembled in the header tank (1) located at both ends of the tube (2), and between each tube (2) a heat exchanger (4) having a center assembled It is shown.

Figure 2 shows a cross section of a conventional tube and its tube in longitudinal A-A.

The tube 2 is extruded and is a tube in which a plurality of partitions 6 are formed. The heat exchange fluid flows between the partitions 6 and the heat exchange is performed between the tube 2 and the outside air. A plurality of rectangular flow paths are formed in the tube 2.

However, in recent years, the condenser used in an air conditioner or a cooling device has been miniaturized as much as possible in consideration of the design freedom of other components installed together.

The miniaturization of the condenser is a basic precondition for improving the heat transfer efficiency between the heat exchange fluid flowing inside the tube and the air outside the tube. However, in order to improve the heat transfer efficiency between the heat exchange fluid and the air, the contact surface area of the tube and the fluid and the air, which are the heat conductors, should be formed as large as possible. There is an inverse correlation between the miniaturizations.

For this reason, the conventional condenser forms a plurality of flow paths in the tube in order to realize the miniaturization possible and to increase the contact area of the heat exchange fluid to the tube.

For example, Japanese Patent Laid-Open No. 58-221390 discloses a heat exchanger (or condenser) in which a plurality of flow paths are formed by inserting a corrugated inner pin into a flat tube. Here, the heat exchanger is characterized in that the technical difficulty of integrally extruding the flat tube is formed by inserting the inner pin and compressing the tube. This trend is further accelerated by the development of extrusion technology.

In addition, Japanese Patent Application Laid-Open No. 59-13,877 discloses a heat exchanger in which a plurality of flow paths are formed inside a flat tube, and in particular, a serration is formed on the inner circumferential surface of the flow path to increase the surface area per unit volume, and as a result, heat exchange efficiency It is disclosed that can be improved.

Accordingly, the present invention is to solve the conventional problems as described above, the technical problem is to provide a condenser tube for an automobile including one or a plurality of protrusions of a predetermined shape for increasing the contact area with the heat exchange fluid inside the tube. It is characterized by.

1 is a schematic diagram of a typical automotive capacitor.

2 is a cross-sectional view of a conventional condenser tube,

Figure 3 is a partially broken perspective view of the tube of the automotive condenser in the present invention.

4 is a cross-sectional view of the tube of FIG. 3.

5 is an embodiment of the inward projection according to the present invention.

Figure 6 is an embodiment of the outward projection according to the present invention

* Description of the symbols for the main parts of the drawings *

1: header tank 2100: tube

3: fluid inlet, outlet 4: condenser

111: Euro 112,113: inward protrusion

161: groove t1, t2: thickness of the dive, projection thickness

The constitution of the present invention for realizing this comprises a condenser tube having a plurality of flow paths formed by partition walls and allowing heat exchange fluid to flow through the inside of the flow path so as to exchange heat with the outside air. It is characterized in that a condenser tube for an automobile is provided, wherein a protrusion having a predetermined shape for increasing the contact area with the heat exchange fluid is protruded from the flow path wall surface.

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

FIG. 3 is a partially broken perspective view of a tube of a condenser for an automobile including a microfin (protrusion) according to the present invention, and FIG. 4 is a cross-sectional view of the partially broken tube of FIG. 3. The condenser tube 100 includes a plurality of inward protrusions 112 and 113 protruding from a wall surface of the flow path 111 so as to exchange heat with the external air by flowing a heat exchange fluid inside the flow path 111. The cross-sectional shape of the flow path 111 of the tube 100 has a rectangular shape, and the shapes of the plurality of inward protrusions protruding from the flow path cross section are upright in a state perpendicular to the flow path inner circumferential surface.

However, the protrusions form 1 to 6, and the length of the protrusions and the hydraulic diameter of the flow path is preferably formed in a ratio of 0.1 to 0.8: 1, and the hydraulic diameter is preferably 0.05 to 0.37 mm. In addition, it is preferable to form the cross-sectional area of the inward protrusion and the cross-sectional area of the inner passage in a ratio of 0.01 to 0.5: 1.

The height of the tube is 2.0 mm or less, and the thickness of the protrusion formed inside the tube is preferably 0.2 mm or less.

Therefore, the protrusion inside the tube includes the above conditions, and has an effect of increasing the thermal efficiency by widening the surface area with respect to the refrigerant.

The protrusion of the tube can be modified and applied in various shapes. Next, the deformation and application of these various shapes will be described.

Figure 5 is an embodiment of the tube according to the present invention, Figure 6 is an outwardly projecting embodiment of the tube according to the present invention and will be described.

The various protrusion shapes of FIG. 5 will be described in detail as shapes for widening the surface area of the part contacting the refrigerant. The shapes are protrusions formed in one flow path, and the protrusions are all formed inside the plurality of flow paths.

In FIG. 5, reference numerals 120 to 140 denote one rectangular protrusion shape in one rectangular flow path, while the protrusion shapes include one (1) ruler (120), a Y (Y) ruler, and a tee (T). A variety of shapes, such as ruler 122, keyhole 123, tree branches (124, 125) are possible.

The reference numerals 130 to 134 of FIG. 5 indicate two to three rectangular protrusions in the rectangular flow path, and are disposed on the upper and lower ends of the flow path of the tube and disposed parallel to the upper and lower ends (130), Various arrangements such as staggered arrangement (131, 132, 133, 134) are possible. It is also possible to deform in the way of the projections (132,133)

In FIG. 5, reference numerals 140 and 141 show a shape having bends in one portion of the protrusions while two protrusions are formed inside the rectangular passage.

The reference numerals 150 to 152 of FIG. 5 indicate four rectangular protrusions formed inside the rectangular flow path, while the length of the upper and lower protrusions is greater than or equal to or less than half the thickness of the flow path, or diagonally to the corners of the rectangle. It is also possible for the protrusion 152 to be located.

The reference numeral 160 of FIG. 6 is a protrusion shape further including an outward groove 161 in the flow path.

Although illustrated and described with reference to specific embodiments as described above, the present invention is not limited to the illustrated structure, it is possible to change and change in the claims of the present application.

The inner protrusions and the inner fins of the present invention configured as described above have a structure capable of increasing heat transfer efficiency to the outside by increasing the contact area of the refrigerant passage. Therefore, while the tube can manufacture a highly efficient tube of 1.0 mm to 2.0 mm, while promoting the miniaturization of the condenser, it is possible to reduce costs and improve performance.

Claims (11)

A condenser tube having a plurality of flow paths formed by barrier ribs and allowing heat exchange fluid to flow through the inside of the flow path so as to exchange heat with external air, wherein the contact area with the heat exchange fluid is increased on the inner tube flow path. A condenser tube for automobiles, characterized in that the projections of the predetermined shape are projected from the flow path wall surface. The condenser tube of claim 1, wherein the inner protrusions form 1 to 6, and the length of the protrusions and the hydraulic diameter of the flow path are formed at a ratio of 0.1 to 0.8: 1. The condenser tube of claim 1, wherein the hydraulic diameter of the flow path is in the range of 0.05 to 0.37 mm. The condenser tube for automobile according to claim 1, wherein the cross-sectional area of the projection is formed at a ratio of 0.01 to 0.5: 1 with respect to the total cross-sectional area connecting the outer portion of the cross-sectional shape. The condenser tube for automobile according to claim 1, wherein the inward protrusion is formed upright in a state perpendicular to the inner circumferential surface of the flow path. The condenser tube for automobile according to claim 1, wherein an outward groove is further formed in the flow path. The condenser tube for automobile according to claim 1, wherein the height of the tube is 2.0 mm or less, and the thickness of the protrusion formed inside the tube is 0.2 mm or less. The condenser tube of claim 1, wherein the cross-sectional shape of the flow path is formed in one of rectangular, circular or non-circular shapes. The condenser tube for automobiles according to claim 1, wherein the protrusions formed in the passage have a straight (1) shape, a Y (Y) shape, a tee (T) shape, a keyhole shape, and a tree branch shape. The condenser tube for automobiles according to claim 1, wherein the arrangement of the plurality of protrusions formed in the one flow passage is disposed at the top and the bottom of the flow passage, while the top and bottom protrusion arrangements are arranged in parallel or staggered. The condenser tube for automobile according to claim 1, wherein the shape of the plurality of protrusions formed in the one flow path includes a shape bent at any one portion.