KR100722696B1 - Heat exchanger - Google Patents

Abstract

 The present invention relates to a heat exchanger having a pair of header tanks facing each other and a core portion including a plurality of refrigerant tubes connected at one end to a header tank on one side and connected at the other end to a header tank on the other side. The flow path of the coolant is one-pass, and the coolant tubes are arranged in the lengthwise direction between the respective header tanks, and are characterized by consisting of two or more coolant tubes having hydraulic diameters of different sizes.

Description

Heat exchanger

1 is a schematic perspective view showing a refrigerant flow of a conventional heat exchanger.

Figure 2 is a schematic perspective view showing the refrigerant flow of the heat exchanger according to the present invention.

Figure 3 is a perspective view showing the structure of a heat exchanger according to a first embodiment of the present invention.

4 is an exploded perspective view of FIG. 3;

Figure 5 is a schematic view showing a cross-sectional structure of the refrigerant tube implemented in the heat exchanger according to the first embodiment of the present invention.

Figure 6 is a perspective view showing the structure of a heat exchanger according to a second embodiment of the present invention.

7 is an exploded perspective view of FIG. 6;

Explanation of symbols on the main parts of the drawings

100: core portion 110: upper header tank

120: refrigerant tube 130: lower header tank

200: plate, first plate 210: top plate

211: refrigerant inlet 213,313: refrigerant outlet

220,320: Lower plate 221,321: Communication part

230: Filler 240,340: Manifold

300: second plate

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for automobiles, and more particularly to a heat exchanger in which a refrigerant tube is arranged in the longitudinal direction of the header tank so that the refrigerant flow is made in one pass.

In general, a heat exchanger is a device that exchanges heat by indirectly contacting two fluids having different temperatures with a material having high conductivity.

The stack type heat exchanger, in which a plate and a center are alternately stacked among the heat exchangers, has been miniaturized due to an increase in heat transfer efficiency according to technology development.

The thermal core is used for heat exchange in such a manner that the heated fluid flows inside to warm the surrounding air, and the evaporator constituting the refrigerating cycle absorbs heat from outside to vaporize It is used for heat exchange in the same way as cooling air.

In addition, the transmission oil cooler is attached to a transmission that adjusts and transmits the power generated by burning fuel in an engine of an automobile at an appropriate gear ratio to a driving wheel, so that the oil filled in the transmission is heated at high temperature due to mechanical friction. As the viscosity decreases, the lubrication of mechanical elements, such as gears, becomes poor, causing abrasion, causing oil to flow inside the coolant along with the coolant to prevent the transmission from losing mechanical integrity and deteriorating transmission performance. It is used for heat exchange in the same way as cooling the oil by allowing the cooling water to absorb.

The radiator is also used for heat exchange in a manner of cooling the coolant by releasing heat to the air while the hot coolant flows inside the engine to prevent the engine from overheating and maintain the proper temperature at all times. .

A general heat exchanger used for the above purpose is a pair of horizontal header tanks facing each other up and down largely, and a plurality of refrigerant tubes connected at an upper end to the upper header tank and a lower end to the lower header tank. It is composed.

 FIG. 1 is a schematic perspective view showing a refrigerant flow of a general heat exchanger, and a conventional heat exchanger as shown in the drawing includes two or more refrigerant paths to increase heat efficiency.

However, in order to configure two or more refrigerant paths, a plurality of refrigerant tubes must be arranged in parallel in the left and right directions of the header tank, and a separate compartment must be provided in the header tank, which makes the structure of the heat exchanger complicated and a lot of time in the assembly process. Because of this, there is a problem that the production efficiency is lowered.

Therefore, there is a demand for development of a heat exchanger in which the production efficiency is improved by simply configuring the refrigerant path structure of the heat exchanger.

An object of the present invention for solving the above problems is to arrange the refrigerant tubes in a row in the longitudinal direction of the header tank and to configure the refrigerant flow in one pass, thereby simplifying the manufacturing process, and uniformity to each refrigerant tube It is an object of the present invention to provide a heat exchanger in which a refrigerant distribution is made so that the heat exchange efficiency is improved.

The present invention for achieving the above object has a pair of header tanks facing each other, and a core portion consisting of a plurality of refrigerant tubes connected to one end of the header tank and the other end in communication with the other header tank For heat exchanger,

The flow path of the coolant is one-pass, and the coolant tubes are arranged in the lengthwise direction between the respective header tanks, and the different sizes are used in order to increase the heat dissipation performance of the core composed of the tube and the heat exchange fins and to equalize the coolant temperature distribution. Two or more kinds of refrigerant tubes having a hydraulic diameter of are arranged in a line in the longitudinal direction between the upper and lower header tanks.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail. Here, the description of the upper and lower parts in the following description is due to the direction of the drawings, and does not limit the orientation when using the actual heat exchanger.

Figure 2 is a schematic perspective view showing the refrigerant flow of the heat exchanger according to the present invention, as shown in the figure the present invention rides through each refrigerant tube connected to the lower header tank the refrigerant introduced into the lower header tank of the heat exchanger The heat exchanger is configured to allow for a one-pass refrigerant flow that is moved to and discharged from the upper header tank at one time.

3 is a perspective view showing the structure of a heat exchanger according to a first embodiment of the present invention, Figure 4 is an exploded perspective view of FIG.

The heat exchanger according to the first embodiment of the present invention as shown in the figure, a pair of upper and lower header tanks 110 and 130 facing each other up and down, and the upper header tank 110 A core part 100 including a plurality of refrigerant tubes 120 connected to an upper end of the lower header tank 130 in communication with a lower end thereof is coupled to one side of the core part 100 to inject a refrigerant. Or a plate 200 forming a refrigerant inlet / outlet 211 and 213 to be discharged or discharged.

The upper and lower header tanks 110 and 130 are manufactured in a rectangular hollow tube shape, one end of which is blocked, and the other end of the plate forming a refrigerant inlet / outlet 211 and 213 for introducing or discharging the refrigerant. Coupled by the (200), as the plurality of refrigerant tubes 120 are vertically coupled through the hollow tube, the refrigerant between the upper / lower header tank 110, 130 is moved.

5 is a schematic view showing a cross-sectional structure of a refrigerant tube implemented in the heat exchanger according to the first embodiment of the present invention.

The refrigerant tube 120 as shown in the figure is arranged in a line in the longitudinal direction between the upper and lower header tanks (110, 130), and serves to pass the refrigerant flow one-way, heat exchange with the tube In order to increase the heat dissipation performance of the core consisting of fins and to evenly distribute the refrigerant temperature, two or more kinds of refrigerant tubes 120 having different diameters of hydraulic diameters are provided between the upper and lower header tanks 110 and 130. It has a configuration arranged in a line in the direction.

At this time, the tube cross-section is produced in a long hole shape, the length of the long hole is preferably formed to a degree similar to the width of the short side portion of the upper / lower header tank 130.

At this time, between the coolant tube 120 is repeatedly coupled to the cooling fins 140 of the iron piece shape bent to improve the heat exchange efficiency.

Such, the refrigerant tube 120 is preferably extrusion molded or folded (folded) molded.

The plate 200 is coupled to the core portion 100 side to form a lower end portion 220 and the communication end 221 and the communication end 221 of the upper and lower header tanks 110 and 130, and the lower plate 220 By being coupled to the upper side, to form a separately divided filling portion 230, and to form the refrigerant inlet / outlet 211, 213 for injecting and discharging the refrigerant near the partitioned boundary of the filling portion 230, respectively The upper plate 210 is configured.

At this time, the refrigerant inlet / outlet 211, 213 is preferably formed on the opposite side of the communication portion 221 position, which is the injected refrigerant is not immediately passed through the communication portion 221 filling portion 230 ) To go through a certain amount of filling process.

The heat exchange action of the heat exchanger according to the first embodiment of the present invention having the above configuration will be described.

First, refrigerant is injected through the refrigerant inlet 211 formed in the plate 200, and the injected refrigerant is filled in the filling part 230 to the lower header tank 130 through the lower communication part 221. Is injected.

Thereafter, the refrigerant injected into the lower header tank 130 is moved upward by riding the plurality of refrigerant tubes 120 at a time due to the pressure of the refrigerant being continuously injected.

At this time, while passing through the refrigerant tube 120, the refrigerant is in heat exchange with the atmosphere through the refrigerant tube 120 or the cooling fins 140 coupled between the refrigerant tubes 120.

Thereafter, the heat exchanged refrigerant is filled with the upper header tank 110, and then filled with the filling part 230 of the plate through the communicating part 221 formed at one side thereof, and the heat circulation discharged through the refrigerant outlet 213. The path will be repeated.

The present invention as described above has the advantage that the structure of the heat exchanger is made simple by arranging the coolant tubes 120 in a line in the longitudinal direction of the header tanks 110 and 130 and the coolant flow in one pass. do.

6 is a perspective view showing the structure of a heat exchanger according to a second embodiment of the present invention, Figure 7 is an exploded perspective view of FIG.

The heat exchanger according to the second embodiment of the present invention as shown in the figure, a pair of upper and lower header tanks 110 and 130 facing each other up and down, and the upper header tank 110 An upper end is connected to the lower header tank 130, the lower end is in communication with the core part 100 consisting of a plurality of refrigerant tubes 120 connected in communication with each other, both sides of the core part 100, one side is A refrigerant inlet 211 for injecting the refrigerant is formed, and the other side is composed of first and second plates 200 and 300 configured to form a refrigerant outlet 213 for discharging the refrigerant.

The upper / lower header tanks 110 and 130 are manufactured in a rectangular hollow tube shape. As the plurality of refrigerant tubes 120 are vertically coupled through the hollow tube, the upper and lower header tanks 110 are formed. The refrigerant between the 130 is moved.

The refrigerant tube 120 is arranged in the longitudinal direction between the upper and lower header tanks 110 and 130, as shown in Figure 5, and serves to pass the refrigerant flow one-pass, the tube and heat exchange In order to increase the heat dissipation performance of the core consisting of fins and to evenly distribute the refrigerant temperature, two or more kinds of refrigerant tubes 120 having different diameters of hydraulic diameters are provided between the upper and lower header tanks 110 and 130. It has a configuration arranged in a line in the direction.

At this time, the tube cross-section is produced in a long hole shape, the length of the long hole is preferably formed to a degree similar to the width of the short side portion of the upper / lower header tank (130).

At this time, between the coolant tube 120 is repeatedly coupled to the cooling fins 140 of the bent iron piece shape to improve the heat exchange efficiency.

Such, the refrigerant tube 120 is preferably extrusion molded or folded (folded) molded.

The first plate 200 is coupled to one side of the core part 100 to form a communication end 221 and the passage end of the lower header tank 130, and is coupled to the upper side of the lower plate 220 In the upper plate 210 and the refrigerant inlet of the upper plate 210 to form a filling unit 230 therein, and to form a refrigerant inlet 211 for injecting the refrigerant into the upper surface of the filling unit 230; It consists of a manifold 240 that is coupled.

At this time, the refrigerant inlet 211 is preferably formed on the opposite side of the communication portion 221 position, which is injected into the filling portion 230 is filled with a certain amount of the refrigerant is not immediately passed through the communication portion 221 This is to go through the process.

The second plate 300 is coupled to the other side of the core part 100 to form a lower end 320 and a communication end 321 and the passage end of the upper header tank 110, and the communication portion of the lower plate 320 ( In combination with 321, the manifold 340 is configured to form a refrigerant outlet 313 to discharge the refrigerant.

In this case, unlike the first plate 200, the second plate 300 has a configuration in which the upper plate 210 having the filling part 230 is not coupled.

The heat exchange action of the heat exchanger according to the second embodiment of the present invention having the above configuration will be described.

First, refrigerant is injected through the manifold 240 coupled to the upper refrigerant inlet 211 of the first plate 200, and the injected refrigerant is filled in the filling unit 230 to communicate with the lower communication unit 221. It is injected into the lower header tank 130 through).

Thereafter, the refrigerant injected into the lower header tank 130 is moved upward by riding the plurality of refrigerant tubes 120 at a time due to the pressure of the refrigerant being continuously injected.

At this time, while passing through the refrigerant tube 120, the refrigerant is in heat exchange with the atmosphere through the refrigerant tube 120 or the cooling fins 140 coupled between the refrigerant tubes 120.

Thereafter, the heat exchanged refrigerant is filled with the upper header tank 110, and then passes through the communication portion 321 of the second plate 300 coupled to one side thereof, and is directly connected to the communication portion 321 to coolant outlet. The heat circulation path discharged through the manifold 340 forming the 313 is repeated.

The present invention as described above has the advantage that the structure of the heat exchanger is made simple by arranging the coolant tubes 120 in a line in the longitudinal direction of the header tanks 110 and 130 and the coolant flow in one pass. do.

Through the technical contents of the present invention having the above configuration, those skilled in the art can recognize that various changes and modifications can be made without departing from the technical spirit of the present invention.

Therefore, the true technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

In the present invention, by arranging the refrigerant tubes in a line in the length direction of the header tank and configuring the refrigerant flow in one pass, the manufacturing process can be simplified, thereby reducing manufacturing costs and improving work efficiency. There is.

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Claims (6)

 In a heat exchanger having a pair of header tanks facing each other and a core portion consisting of a plurality of refrigerant tubes, one end of which is connected to one of the header tanks and the other end of which is in communication with the other of the header tanks, The refrigerant flowing into the one header tank is moved to and discharged from the other header tank at one time through each refrigerant tube connected to the other header tank, so that the flow path of the refrigerant is one-pass, and the refrigerant tube is between each header tank. Heat exchanger, characterized in that consisting of two or more kinds of refrigerant tubes arranged in a line in the longitudinal direction, each having a hydraulic diameter of different sizes. The method of claim 1, Each header tank is manufactured in a hollow tube shape, one end of which is blocked, and the other end is coupled by a plate forming a refrigerant inlet / outlet for introducing or discharging the refrigerant, and a plurality of refrigerant tubes penetrate vertically inside the hollow tube. Heat exchanger, characterized in that coupled. The method according to claim 1 or 2, The refrigerant tubes are arranged in a line in the longitudinal direction between the respective header tanks, the tube cross-section is made of a long hole shape having a length equal to the width of the inner hollow portion of the cross section of the header tank, or relatively small by about 1 to 3mm Heat exchanger made. The method according to claim 1 or 2, And the refrigerant tube is extrusion molded or folded molded. The method of claim 2, The plate is coupled to the core side to form a lower plate for communicating with the end of each passage of each header tank, and coupled to the upper plate, to form a separate compartment filled portion, the refrigerant is injected near the partitioned boundary of the filled portion And a top plate configured to respectively form a refrigerant inlet / outlet for discharging. The method of claim 1, A heat exchanger configured to be coupled to both sides of the core part, one side of which forms a refrigerant inlet for injecting the refrigerant, and the other side of which forms a refrigerant outlet for discharging the refrigerant; .

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