KR20020036462A - Structure of pipe connector - Google Patents

Abstract

PURPOSE: A pipe connector structure is provided to improve heat radiating performance by allowing the core to have a uniform temperature distribution through the back pressure formed within a chamber of tank prior to the passage of cooling water. CONSTITUTION: A heat exchanger comprises a pair of upper and lower headers(30); a pair of upper and lower tanks(31) installed outside the upper and lower headers; a plurality of tubes(13) interposed between the upper and lower headers; fins(14) disposed between tubes; pipe connectors(40) installed to the upper tank and a pipe connector installed to the lower tank, respectively. The pipe connectors installed to the upper tank have back pressure units(42) arranged at the inlet sides of pipe connectors. The back pressure unit is formed by closing an outlet side end of the pipe connector, and forming a plurality of through holes at the outer periphery of the outlet side.

Description

Pipe connector structure {STRUCTURE OF PIPE CONNECTOR}

The present invention relates to a pipe connector structure, and more particularly, to form a back pressure means in a pipe connector connected to the cooling water discharge pipe side, so that the back pressure is formed in the chamber in the tank before passing to this portion, so that the cooling water is uniform throughout the core. The present invention relates to a pipe connector structure which improves heat dissipation performance due to a uniform temperature distribution throughout the core.

As is well known, a heat exchanger is a small radiator mounted under a dash of a vehicle, and is used to heat a room by circulating air with a blower as a heat source with hot coolant via a heat source such as an engine.

Recently, in response to the trend of thinner and lighter heat exchangers, efforts have been made to manufacture thin heat exchangers that can reduce pressure loss while maintaining a constant amount of cooling water.

The structure of the heat exchanger manufactured as a result of this effort is shown in FIG.

As shown, a pair of headers (1) (2) having a chamber formed in a predetermined space therebetween are arranged to be spaced apart from each other by a predetermined distance, and the headers (1) (2) can communicate with the chamber at both ends. In order to be connected to the inside of the structure, a plurality of tubes 3 are arranged between the pair of headers 1 and 2 so as to have a predetermined interval.

A pair of corrugated fins 4 are disposed between the tubes 3 to form a core 5 for exchanging cooling water, and a pair having a predetermined chamber inside each of the headers 1 and 2. Tanks 6 and 7 are provided, and the chambers of the tanks 6 and 7 are provided so as to be able to communicate with the headers 1 and 2, respectively.

In any of the tanks 6 and 7, the tank 6 located on the left side of the drawing has a coolant discharge pipe 8 and a coolant inlet pipe 9 at the upper and lower proper positions with respect to the center. It is installed in communication with the chamber.

In the chamber corresponding to the center of the tank 6 in which the cooling water discharge / inflow pipes 8 and 9 are installed, a baffle for increasing the flow path length by increasing the flow path length by making the flow of the cooling water “⊃” ( 10) is installed.

However, the heat exchanger having the above-described configuration has been developed to be thin and lightweight, so that the pressure loss value on the coolant side is increased due to the narrow flow path area, and thus the flow rate of the coolant decreases when the vehicle is idling or at low speed, thereby reducing the performance of the heat exchanger. there was.

2 to 4 show a conventional heat exchanger developed to solve the above problems.

A pair of headers 11 and 12 having a chamber having a predetermined space therein are disposed to be spaced apart from each other by a predetermined distance, and connected to an inner portion of the headers 11 and 12 so that both upper and lower ends can communicate with the chamber. In the structure provided, a plurality of tubes 13 are arranged at regular intervals from side to side between the pair of headers 11 and 12.

A pair of corgate pins 14 are disposed between the tubes 13 to form a core 15 for heat-exchanging the cooling water, and a pair having a predetermined chamber inside the headers 11 and 12. The tanks 16 and 17 are provided, and the chambers of the tanks 16 and 17 are provided so as to communicate with the headers 11 and 12.

As shown in the drawings of the tanks 16 and 17, coolant discharge pipes 18 and coolant inlet pipes 19 are provided in communication with the chambers of the tanks 16 and 17, respectively.

More specifically, the coolant discharge pipe 18 and the coolant inlet pipe 19 are connected to the tanks 16 and 17 via a pipe connector 20.

According to the conventional heat exchanger configured as described above, it is possible to solve the problem that the pressure drop in the coolant side occurs less, but compared to the heat exchanger shown in FIG. 1 described above, since the distribution of the coolant flow rate of the entire heat exchanger core is not uniform. The heat dissipation performance of the heat exchanger was degraded.

The present invention has been made to solve the above problems, by forming a cooling water back pressure means in the pipe connector connected to the cooling water discharge pipe side so that the back pressure is formed in the chamber in the tank before passing to this portion, the cooling water throughout the core The purpose of the present invention is to provide a pipe connector structure in which the temperature distribution is uniformly distributed, thereby improving heat dissipation performance.

1 is a front view showing a heat exchanger according to one example of the prior art.

2 is a front view showing a heat exchanger according to another example of the prior art.

3 is a detailed inner cross-sectional view of the leader line "A" shown in FIG.

4 is a detailed inner cross-sectional view of the leader line "B" shown in FIG.

5 is a cross-sectional view another installation according to one embodiment of the pipe connector constituting the heat exchanger of the present invention.

FIG. 6 is a perspective view showing the appearance of the pipe connector shown in FIG. 5; FIG.

7 is a perspective view showing an appearance according to another embodiment of the pipe connector shown in FIG.

Figure 8 is a perspective view showing the appearance according to another embodiment of a pipe connector according to the present invention.

Figure 9 is a perspective view showing the appearance according to another embodiment of a pipe connector according to the present invention.

10 is a graph showing after the experiment on the heat dissipation amount and the pressure drop in the case with and without the back pressure means in the pipe connector according to the present invention under the air flow rate 200 ㎥ / h.

FIG. 11 is a graph of the heat dissipation amount and the pressure drop in the case where the pipe connector according to the present invention has a back pressure means under a condition of 400 m 3 / h of air flow rate and the pressure drop.

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

31: upper tank

33: cooling water discharge pipe

40, 50: pipe connector

41: connection

42, 51, 61, 71: back pressure means

42a: bending piece

51b: closed wall

42b, 51a: through hole

The present invention for achieving the above object, a pair of upper and lower headers, a pair of upper and lower tanks provided on the outside of each of the upper and lower headers, a plurality of tubes provided between the upper and lower headers, and between the tubes In the heat exchanger consisting of a fin disposed, and a pipe connector respectively installed in the upper and lower tanks, characterized in that the back pressure means is provided on the inlet side of the pipe connector provided on one side of the upper tank.

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

Figure 5 is a perspective view illustrating the appearance of the pipe connector shown in a follow different installed sectional view in one embodiment of the pipe connector constituting the heat exchanger of the present invention, Figure 6 is a 5, 7 is shown in Figure 5 the pipe 8 is a perspective view showing an appearance according to another embodiment of the connector, Figure 8 is a perspective view showing an appearance according to another embodiment of a pipe connector according to the present invention, Figure 9 is another embodiment of a pipe connector according to the present invention Figure 10 is a perspective view showing the appearance, Figure 10 is a graph shown after the experiment on the heat dissipation amount and pressure drop with and without the back pressure means in the pipe connector according to the present invention under the air flow rate 200㎥ / h, 11 is an experiment on the heat dissipation amount and the pressure drop in the case with and without the back pressure means in the pipe connector according to the present invention under the air flow rate 400㎥ / h It is a graph showing.

As shown, the heat exchanger according to the present invention, as shown in Figs. 4 and 5, the core consisting of the upper and lower headers 30, 12, the tube 13 and the corgate pin 14 ( 15), upper and lower tanks 31 and 17, cooling water inflow pipe 19, pipe connectors 20 and 40, and cooling water discharge pipe 33.

The upper and lower headers 30 and 12 are arranged to be spaced apart at appropriate intervals up and down, and a chamber is formed therein.

Both ends of the tube 13 are connected to the inside of the upper and lower headers 30 and 12 so as to communicate with the upper and lower headers 30 and 12, and the upper and lower headers 30 ( 12) The plurality is arranged to be a constant interval between.

The corgate pin 14 is disposed between the tubes 13.

The upper and lower tanks 31 and 17 are provided outside the upper and lower headers 30 and 12 and a chamber is formed therein so as to communicate with the upper and lower headers 30 and 12.

The cooling water inflow pipe 19 is installed to be coupled to the lower tank 17 via a pipe connector 20 to serve to introduce the cooling water into the chamber of the lower tank 17.

Here, the pipe connector 20 has a predetermined diameter.

The cooling water discharge pipe 33 is coupled to the upper tank 17 via a pipe connector 40 to discharge the cooling water from the upper tank 31 to the outside.

As shown in FIGS. 5 and 7, the pipe connector 40 has a stepped portion 41 in which the cooling water discharge pipe 33 is connected via an O-ring 34 to one end thereof. 31) is formed to protrude to the outside.

That is, since the connecting portion 41 is formed to have a step, even when the pipe connector 40 is inserted through the installation hole 31a formed in the upper tank 31, the connecting portion 41 is formed inside the upper tank 31. Only the remaining part is imported into the system.

At the end of the connecting portion 41, the convex portion 41a and the recessed portion 41b are alternately formed.

An end portion of the cooling water discharge pipe 33 is formed to a size such that an annular flange portion 33a bent outwardly can be slidably inserted into the connection portion 41.

Since the connection part 41 and the uneven part 41a and 41b are formed in the pipe connector 40 as mentioned above, the connection order of the pipe connector 40 and the cooling water discharge pipe 33 is first connected to the connection part 41. After inserting the O-ring 34, the coolant pipe 33 is inserted into the connection portion 41.

Subsequently, by pressing and bending the convex portion 41a formed in the connecting portion 41 by using a separate mechanism, the convex portion 41a pressurizes the flange portion 33a and the cooling water discharge pipe 33 is connected to the connecting portion 41. To be fixed.

On the other hand, the structure for installing the cooling water inlet pipe 19 is shown in Figure 4, the connection method is the same as the cooling water discharge pipe 19 does not describe a separate member number on the drawing.

The back pressure means 42 is formed in the pipe connector 40 drawn into the upper tank 31 except the connection part 41.

This back pressure means 42 is composed of a plurality of bending pieces 42a which are detachably bent in the direction of the inner center of the pipe connector 40, as shown in Figs.

Preferably, only part of the outlet end is opened.

Here, preferably, a plurality of through holes 42b may be further formed on the outer circumference of the pipe connector 40.

Referring to the operation of the present invention configured as described above are as follows.

First, the high temperature and high pressure cooling water flows into the lower tank 17 through the cooling water inflow pipe 19 and the pipe connector 20 shown in FIG. 4, and the cooling water thus introduced is transferred through the plurality of tubes 13. Direction is moved to the chamber in the upper tank 31, and then discharged to the cooling water discharge pipe 33 via the back pressure means (42).

Here, since the cooling water passes through the back pressure means 42 while the pressure drops, the space in the upper tank 31 at the rear end of the back pressure means 42 forms the back pressure.

The formation of this back pressure distributes the coolant evenly in the core 15, thereby increasing the amount of heat radiation generated in the corgate 14 between the tubes 13.

10 and 11 show the results of experimenting by applying the heat exchanger of the present invention undergoing the flow of the cooling water to the vehicle.

According to the graph shown in Fig. 10, when the pipe connector according to the present invention has a back pressure means under the condition that the air flow rate of the blower is 200 m 3 / h ( Without Ret (Y)) It can be seen that the heat dissipation amount is improved by 3% compared to Ret (N)), and there is a back pressure means ( Without Ret (Y)) More pressure drop occurs than Ret (N)).

And, according to the graph shown in Fig. 11, when there is a back pressure means in the pipe connector according to the present invention under the condition of the blower air volume 400 m 3 / h ( Without Ret (Y)) It can be seen that the heat dissipation amount is improved by 2% compared to Ret (N)), and there is a back pressure means ( Without Ret (Y)) More pressure drop occurs than Ret (N)).

Therefore, it can be seen that the amount of heat dissipation is different depending on the presence of the back pressure means when the flow rate of the cooling water is about 3 L / min to 10 L / min during idling of the vehicle or at low speed.

Fig. 7 shows another embodiment of the back pressure means 51 formed in the pipe connector 50 according to the present invention. The construction includes a closing wall 51b for closing the entire end of the pipe connector 50, and the pipe connector. It can also be comprised with the several through-hole 51a formed in the outer periphery of 50.

Preferably, the outlet end of the pipe connector 50 is closed, and a plurality of through holes 51a are formed on the outer periphery of the outlet side.

8 shows another embodiment of the back pressure means 61 formed in the pipe connector according to the present invention, the configuration of which is formed on the outer circumference of the pipe connector and a reduction tube 61b extending at the end of the pipe connector. It can also be comprised with two through-holes 61a.

9 shows another embodiment of the back pressure means 71 formed in the pipe connector 70 according to the present invention. The construction thereof includes a reduction tube 71b extending at the end of the pipe connector 70 and this reduction. An enlarged tube 71c extending at the end of the tube 71b and a plurality of through holes 71a formed on the outer circumference of the pipe connector 70 may be formed.

More specifically, the shaft tube portion is formed at a portion adjacent to the outlet end of the pipe connector 70, and a plurality of through holes are formed on the outer circumference between the shaft tube portion and the inlet side.

As described above, according to the present invention, by forming a back pressure means in the pipe connector connected to the cooling water discharge pipe side so that the back pressure is formed in the chamber in the tank before passing to this portion so that the cooling water is uniformly distributed throughout the core. As a result, the temperature distribution is uniform throughout the core, thereby improving heat dissipation performance.

Claims (4)

Between a pair of upper and lower headers 30 and 12, a pair of upper and lower tanks 31 and 17 provided outside the upper and lower headers 30 and 12, and the upper and lower headers 30 and 12, respectively. It consists of a plurality of tubes (13) to be installed, pins (14) disposed between the tubes (13), and pipe connectors (40, 50, 70, 20) respectively installed in the upper and lower tanks (31) In the heat exchanger, Pipe connector structure characterized in that the back pressure means (42, 51, 71) is provided on the inlet side of the pipe connector (40, 50, 70) installed on one side of the upper tank (31). The method of claim 1, The back pressure means 51, The outlet connector 51b of the pipe connector 50 is closed, and a pipe connector structure is formed by forming a plurality of through holes 51a on the outlet side outer periphery. The method of claim 1, The back pressure means 42, The pipe connector structure, characterized in that configured to open only a part of the outlet end (42a) of the pipe connector 40, a plurality of through holes (42b) on the outlet side outer periphery. The method of claim 1, The back pressure means 71, A shaft tube portion 71b is formed at a portion adjacent to the outlet side end of the pipe connector 70, and a plurality of through holes 71a are formed on the outer circumference between the shaft tube portion 71b and the inlet side. Pipe connector structure.