KR100812500B1 - one united fin of compound heat exchanger - Google Patents

Abstract

The present invention relates to an integrated fin of a composite heat exchanger, comprising: a condenser fin portion in which a condenser tube is in close contact with the outside of the peaks and valleys, and a radiator fin in which the radiator tube is in close contact with the outer edge of the peaks and valleys and brazed; In the integrated fin of the composite heat exchanger in which the connecting fin portion connecting the radiator fin portion and the radiator fin portion are integrated, the air flows through the air between the acid and the valley of the condenser fin portion 22 so that the flow is dispersed and the temperature boundary layer is not grown. A plurality of first louvers 22a formed by cutting a portion thereof are continuously formed along the width direction of the integrated fin 20, and the condenser fin 22 is formed in the plane between the peaks and valleys of the radiator fin 24. A plurality of second bases cut off and partially raised so that the air passing through the) is not dispersed and the temperature boundary layer is not grown. The burr 24a is continuously formed along the width direction of the integrated pin 20, and the louver pitch P1 and the louver angle θ1 of the first louver 22a are the louver pitch of the second louver 24a. Since P2 and the louver angle θ2 are different from each other, the performance of the radiator can be improved, and a plurality of third planes are formed in the plane between the peaks and valleys of the connection portion connecting the radiator fin portion and the condenser pin portion. The louvers 26a are continuously molded in the width direction, thereby improving the formability and assembly work of the fins while preventing heat conduction from the radiator to the condenser, and the air inflow direction of the condenser fin portion and the air inflow direction of the radiator fin portion are the same. It flows in one direction without changing the flow of air to the fin, reducing the pressure drop on the air side and improving the performance of the condenser and the radiator.

Description

One united fin of compound heat exchanger

1 is a perspective view of a conventional composite heat exchanger viewed from an upstream side of an air flow;

Figure 2 is a perspective view of a conventional composite heat exchanger as seen from the downstream side of the air flow,

3 is a perspective view showing the integrated pin of FIGS. 1 and 2;

4 is a cross-sectional view of the core portion of FIGS. 1 and 2;

5 is a cross-sectional view taken along the line A-A in FIG. 4;

6 is a perspective view showing a part of a core part of a composite heat exchanger to which the present invention is applied;

FIG. 7 is a cross-sectional view taken along the arrow line B-B in FIG. 6;

8 is a graph showing the heat dissipation according to the temperature change of the inlet air of the radiator in the composite heat exchanger to which the present invention is applied;

9 (a) and 9 (b) show the arrangement and air flow of the fins and the integrated fins of the conventional composite heat exchanger, and FIG. 9 (c) shows the arrangement air of the integrated fins of the composite heat exchanger according to the present invention. Explanatory drawing showing flow,

FIG. 10 is a graph showing the air pressure drop in FIG. 9 (a) to (c).

<Description of the symbols for the main parts of the drawings>

10: composite heat exchanger 12: condenser tube

14 radiator tube 16 condenser

18: radiator portion 20: integral pin

22: condenser pin portion 22a: first louver

24: radiator pin portion 24a: second louver

26: connecting pin portion 26a: heat conduction prevention louver

The present invention relates to a composite heat exchanger in which a radiator for a vehicle and a condenser are integrated, and more particularly, to an integrated fin of a composite heat exchanger.

As shown in FIG. 1 (see Korean Patent Laid-Open No. 2001-0105346), a condenser 110 of a complex heat exchanger 100 having a radiator and a condenser integrated therein is provided with a plurality of refrigerants (first fluid). Condenser fins (first fins) 112 disposed on the outer surface between the condenser tubes 111 to promote heat exchange between the refrigerant and air, and condenser tubes 111 disposed on both longitudinal ends of the condenser tubes 111. And the header tanks 113 and 114 in communication with each other. As shown in FIG. 4, the condenser tube 111 has a multi-blood structure having a plurality of refrigerant passages 111a formed therein.

As shown in FIG. 2, the radiator 120 of the complex heat exchanger 100 in which a radiator and a condenser are integrated is provided with a plurality of radiator tubes 121 and respective radiator tubes 121 through which coolant (second fluid) flows. Exposed between the radiator fins (second fins) 122 and the radiator tubes 121 which extends between the radiator fins 121 and the radiator tubes 121 to promote heat exchange between the coolant (the second fluid) and the air, thereby communicating with each radiator tube 121. Header tanks 123, 124 and the like.

Side plates 130 made of reinforcing members are disposed at the ends of the condenser 110 and the radiator 120. The two tubes 111 and 121, the two fins 112 and 122, and the two header tanks 113, 114, 123, 124 and the side plate 130 are integrally joined by brazing.

3 to 5, the condenser fin 112 and the radiator fin 122 are integrated, alternately formed integrally by a roller forming method, and at the same time, a plurality of peaks 112a and 122a and valleys ( And corrugated pins in the shape of waves formed of flat portions 112c and 122c connecting 112b and 122b with adjacent peaks 112a and 122a and valleys 112b and 122b.

In the planar portions 112c and 122c, not only the flow of air passing through the fins 112 and 122 is disturbed, but also the growth of the temperature boundary layer is prevented from growing, and a portion of the louver formed by opening and cutting is opened. The joint part f which partially connects the both pins 112 and 122 in the state which 112d and 122d was formed and isolate | condensed the capacitor | condenser pin 112 and the radiator fin 122 more than predetermined dimension (W). It is formed across the plurality of peaks 112a and 122a and the valleys 112b and 122b.

On the radiator tube 121 side of the condenser pin 112, it projects toward the radiator tube 121 from the width direction end part of the condenser tube 111 in the direction orthogonal to (intersected) the longitudinal direction of the condenser tube 111. As shown in FIG. Protruding portion 112e is formed. In addition, the condenser tube 111 side of the radiator fin 122 has a direction orthogonal to the longitudinal direction of the radiator tube 121 toward the condenser tube 111 at the widthwise end of the radiator tube 121. The protrusion part 122e which protrudes is provided.

Both protrusions 112e and 122e are provided with uneven portions 112f and 122f which increase the surface area of both pins 112 and 122 by plastically deforming into a wave shape without cutting a part of them in a roller molding machine. The ridge direction of these uneven parts 112f and 122f is set so that it may become substantially parallel to the direction which the louvers 112d and 122d raise | strengthened.

In the conventional composite heat exchanger in which the radiator and the condenser are integrated, the fins 112 and 122, which the condenser tube 111 and the radiator tube 121 contact, are integrally formed by the joint part f, and the condenser tube 111 And the wave-shaped uneven portions 112f and 122f are formed in the protrusions 112e and 122e of the clearance S between the radiator tube 121 and the radiator tube 121 to secure a heat transfer area of the condenser 110 and the radiator 120. Increase performance.

In addition, the second fluid having a high temperature is formed by forming a joint f which partially connects both the fins 112 and 122 in a state in which the condenser fin 112 and the radiator fin 122 are separated by a predetermined dimension (W) or more. In the radiator 120 in which the cooling water flows, thermal conductivity is prevented from flowing to the condenser 110 through which the low temperature first fluid (refrigerant) flows, thereby preventing the performance of the condenser 110 from decreasing.

In addition, as indicated by arrows in FIG. 5, the air flowing from the condenser side is zigzag along the louvers 112d and 112d raised at a constant louver angle φ, and heat transfer is improved by frictional resistance with the louvers. At this time, the bent direction changing part C is formed between the louvers 112d and 112d whose direction is changed. In addition, when the louver pitch Pt is dense, heat transfer with air is improved, and when the louver angle φ is large, heat transfer with air is improved. The louver pitch Pt and louver angle in the integrated fin of a conventional composite heat exchanger are improved. (phi) has the same value on the capacitor | condenser side and the radiator side.

However, when the performance of the condenser 110 is increased in the conventional composite heat exchanger having an integrated fin in which the louver pitch Pt and the louver angle φ of the condenser side and the radiator side are the same, the discharge air temperature of the condenser increases. There is a problem in that the performance of the radiator 120 which makes the discharge air of this condenser the inlet air becomes low. This is because the complex heat exchanger is installed in the engine room of the actual vehicle, and the external air passes through the condenser side of the integrated fins and then passes through the radiator side of the integrated fins. This is because the performance of the radiator decreases, and the relatively low temperature of the air passing through the condenser increases the radiator heat, thereby increasing the performance of the radiator.

In addition, when the high temperature heat of the radiator is conducted to a relatively low temperature condenser, the supercooling degree of the refrigerant of the condenser decreases and thus the cooling capacity thereof decreases, so that the condenser fin 112 and the radiator fin 122 can increase the performance of the condenser. ) Is a structure which forms the joint part f which partially connects both pins 112 and 122 in the state isolate | separated more than predetermined dimension (W). This structure makes the formation of the integral fins very difficult, and additional processes are included before and after louver molding in the fin forming, and the joints (f) are partially formed so that warpage occurs in the integral fin during assembly of the composite heat exchanger. There was a problem that the castle is falling.

In addition, the turning part C bent between the louvers 112d and 112d of the integrated pin has a problem in that the resistance of the air is increased to reduce the blowing amount due to an increase in the pressure drop of the air. In the air pressure drop experiment of the general heat exchanger, it was confirmed that the pressure drop of the air side was increased by about 15% or more in the case of three direction change parts.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to improve the formability and assembly workability of the fin while reducing the pressure drop on the air side while increasing the performance of the radiator while preventing heat conduction from the radiator to the condenser. An integrated fin of a composite heat exchanger is provided.

The integrated fin of the composite heat exchanger according to the present invention for achieving the above object is a condenser fin portion in which the condenser tube is in close contact with the outside of the hill and the valley, and the radiator fin portion in close contact with the radiator tube in the outer side of the peak and valley. And an integrated fin of a composite heat exchanger in which a connecting fin portion connecting the condenser fin portion and the radiator fin portion is integrated, the flow between the acid and the valley of the condenser fin portion is scattered while outside air flows, and the temperature boundary layer grows. A plurality of first louvers, which are formed by cutting a portion thereof, are formed continuously along the width direction of the integrated fin, and the air passing through the condenser fin is scattered on the plane between the peak and the valley of the radiator fin. A number of agents cut off and partially raised so that the temperature boundary layer does not grow The two louvers are continuously formed along the width direction of the integrated pin, and the louver pitch and the louver angle of the first louver are different from the louver pitch and the louver angle of the second louver.

The louver pitch of the first louver has a larger value than that of the second louver, and the louver angle of the first louver has a smaller value than the louver angle of the second louver.

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

The overall structure of the composite heat exchanger to which the present invention is applied is similar to that of FIGS. 1 and 2, and thus detailed description thereof will be omitted.

Figure 6 is a perspective view showing a part of the core of the composite heat exchanger to which the present invention is applied. As shown, in the composite heat exchanger 10 to which the present invention is applied, the condenser tube 12 and the radiator tube 14 are brazed on both sides of the integrated fin 20, thereby condensing the condenser portion 16 and the radiator portion 18. Forming. The condenser tube 12 is in the form of a flat tube having a multi-blood structure having a plurality of passages 12a formed therein, and the plurality of passages 12a have a refrigerant flowing therein. In addition, the writer tube 14 is in the form of a flat tube having one passage 14a, and cooling water flows through the one passage 14a.

The integrated fin 20 has a condenser fin portion 22 in which the condenser tube 12 adheres to the outside of the peaks and valleys and is brazed, and a radiator in which the radiator tube 14 adheres closely to the outside of the peaks and valleys and is brazed. It is a corrugated pin of wave shape in which the pin part 24 and the connection pin part 26 which connect the said condenser pin part 22 and the radiator pin part 24 are integrated.

A plurality of first louvers 22a formed by cutting a part of the condenser pin portion 22 so as not to grow as the outside air passes through the plane between the peaks and valleys of the condenser fin part 22 are not formed so that the integrated pin 20 is integrated. It is formed continuously along the width direction of the. In addition, a plurality of second louvers formed by cutting a part of the air passing through the condenser fin part 22 in a plane between the peaks and valleys of the radiator fin part 24 so as to disperse the flow thereof so that the temperature boundary layer is not grown. 24a) is formed continuously along the width direction of the integrated pin 20. As shown in FIG. In addition, a heat conduction prevention louver 26a, which is formed by cutting a part thereof to reduce heat conduction from the radiator portion 18 to the condenser portion 16, is integrated in the plane between the peak and the valley of the connecting pin portion 26. It is formed continuously along the width direction of).

As shown in FIG. 7, the first louver 22a and the second louver 24a are inclined in the same direction, and the heat conduction prevention louver 26 is the first louver 22a and the second louver ( It is inclined in the opposite direction to 24a).

The first louver 22a is inclined only in one direction over the entire width direction of the condenser fin portion 22, and the second louver 24a is inclined in only one direction over the entire width direction of the radiator fin portion 24. have.

The louver pitch P1 and the louver angle θ1 of the first louver 22a have different values from the louver pitch P2 and the louver angle θ2 of the second louver 24a. The louver pitch P1 of the first louver 22a has a larger value than the louver pitch P2 of the second louver 24a, and the louver angle θ1 of the first louver 22a is the second louver ( It is smaller than the louver angle of 24a).

In the integrated fin of the composite heat exchanger according to the present invention configured as described above, the louver pitch of the condenser fin part 22 is larger than the louver pitch of the radiator fin part 24, and the louver angle of the condenser fin part 22 is larger than that of the radiator fin part 24. When the louver angle is smaller than the louver angle, the heat exchange amount between the condenser fin part 22 and the air becomes smaller, so that the discharge temperature of the condenser fin part 22 is lowered. Thus, the air inlet temperature of the radiator fin part 24 is lowered, thereby improving the performance of the radiator. .

8 is a graph showing the heat dissipation according to the change in inlet air temperature of the radiator unit according to the wind speed in the composite heat exchanger to which the present invention is applied, and the curve OP shows that the air temperature passing through the condenser unit is 48 ° C when the inlet air temperature of the condenser unit is 35 ° C. It is a curve showing the amount of heat dissipation in the radiator unit according to the wind speed that rises and the air is the inlet air.

In this state, if the air temperature passing through the condenser is lower than 48 ° C., the performance of the condenser is deteriorated, and the heat dissipation of the radiator increases as indicated by the curve OC (difference between the curve OP and the curve OC). Then, as in the present invention, if the louver pitch of the radiator portion is densified and the louver angle of the radiator portion is increased, the heat dissipation amount of the radiator portion is increased as shown by the curve OS (difference between the curve OP and the curve OC).

In addition, the amount of air blown into the integrated fin according to the direction change number of the air flow in the integrated fin shows a lot of difference, in the embodiment of the present invention, the first louver 22a is the condenser fin 22 ), And the second louver 24a is inclined only in one direction over the entire width direction of the radiator fin portion 24. Accordingly, in the present invention, since there is no turning unit as indicated by C in FIG. 5, the air volume may be increased due to the decrease in air pressure drop, thereby increasing the performance of the composite heat exchanger.

Figure 9 (a) shows the arrangement of the general fins of the conventional composite heat exchanger (one of the number of turns) and the air flow, Figure 9 (b) shows the arrangement of the integrated fins of the conventional composite heat exchanger (direction switching The number represents three) and the air flow, and FIG. 9 (c) shows the arrangement state of the integrated fins (two change directions) and the air flow of the integrated heat exchanger of the present invention. The air side pressure drop according to the arrangement of the fins is shown by curves S1, S2 and S3 in the graph of FIG. In Fig. 10, curve S1 shows the air pressure drop in the case where the number of turns is one as shown in Fig. 9A, and curve S2 shows the conventional integral pin having three turns in the number of turns as shown in Fig. 9B. This shows the air pressure drop in the case where it is applied, and the curve S3 shows the air pressure drop in the case where the integrated fin of the present invention having the number of two turns is applied as shown in Fig. 9C. As shown, it can be seen that the air pressure drop S3 when the integrated pin of the present invention is applied is reduced compared to the air pressure drop S2 when the conventional integrated pin is applied.

In addition, the integrated fin of the composite heat exchanger of the present invention is a heat conduction prevention louver without forming a separate heat conduction prevention groove in the connection pin part 26 corresponding to the middle part of the condenser fin part 22 and the radiator fin part 24. By forming (26a) so that heat is not conducted from the radiator portion to the condenser portion, the manufacturing process is simplified as compared with the conventional integrated fins, and there is no warpage during assembly of the composite heat exchanger, thereby improving workability.

According to the integrated fin of the composite heat exchanger according to the present invention, it is possible to improve the performance of the radiator, to improve the formability and assembly work of the fin while preventing heat conduction from the radiator to the condenser, the air inflow direction of the condenser fin portion and the radiator fin portion The air inflow direction is the same and flows in one direction without changing the flow of air to the respective fin parts, thereby reducing the pressure drop on the air side and improving the performance of the condenser and the radiator.

Claims (6)

delete A condenser pin portion in which a condenser tube adheres to the outside of the corrugated pin's peaks and valleys, and a radiator fin part in close contact with the radiator tube in contact with the outer sides of the corrugated pin's peaks and valleys; In the one-piece fin of the composite heat exchanger in which the connecting fin portion connecting the radiator fin portion is integrated, A plurality of first louvers 22a formed by cutting a part of the condenser pin portion 22 so as not to grow as the outside air passes through the plane between the peak and the valley of the condenser fin part 22 are not integrated, and the fin 20 is integrated. It is formed continuously along the width direction of the, the air passing through the condenser pin portion 22 in the plane between the peak and the valley of the radiator fin portion 24 is cut so that the flow is scattered so that the temperature boundary layer does not grow A plurality of second louvers (24a) standing up is formed continuously along the width direction of the integrated pin 20, The louver pitch P1 and the louver angle θ1 of the first louver 22a have different values from the louver pitch P2 and the louver angle θ2 of the second louver 24a. The louver pitch P1 of the first louver 22a has a larger value than the louver pitch P2 of the second louver 24a, The louver angle θ1 of the first louver 22a has a smaller value than the louver angle of the second louver 24a. The method according to claim 2, And the first louver (22a) and the second louver (24a) are inclined in the same direction. The method according to claim 3, The first louver 22a is inclined only in one direction over the entire width direction of the condenser pin portion 22, Said second louver (24a) is inclined in one direction only across the width direction of said radiator fin part (24). The method according to claim 2, In the plane between the peaks and valleys of the connecting pin portion 26, the heat conduction prevention louver 26a, which is cut off and raised by a part thereof, is formed to reduce the heat conduction generated from the radiator portion 18 to the condenser portion 16. Integral fins of a composite heat exchanger, characterized in that formed continuously along the width direction of the. The method according to claim 5, The heat conduction prevention louver (26) is an integral fin of the composite heat exchanger, characterized in that inclined in the opposite direction to the first louver (22a) and the second louver (24a).

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