KR19990075364A - Reinforcement table of heat exchanger and its manufacturing method - Google Patents

Abstract

The present invention relates to a heat exchanger reinforcing rod and a manufacturing method for preventing assembly failures that may occur when the header and the tank of the condenser are temporarily coupled, and to improve the internal pressure of the header pipe. A second header pipe, a plurality of tubes connected at both ends of the first and second header pipes, a plurality of cooling fins interposed between the plurality of tubes, and connecting means for connecting the heat exchanger with external components of the refrigerant circuit. A heat exchanger comprising: a main body in close contact with an outer circumferential surface of a tank of the first and second header pipes and a constriction portion extending from an end portion of the main body and narrowing an outer peripheral surface edge portion of each header of the first and second header pipes. The reinforcing bar is fastened, but the brazing in the state in which the reinforcing bar is fastened to the header pipe, the end of the reinforcing bar It can be fastened in the transverse direction of the header pipe without bending it. Also, by bending the end of the reinforcing rod and inserting it from the top or the bottom of the header pipe in the plastic processing shape in the same shape as the shape of the header pipe, Brazing can be performed in a state where the joint surface of the tank is in close contact.

Description

Reinforcement table of heat exchanger and its manufacturing method

The present invention relates to a heat exchanger constituting an air conditioner for a vehicle, and in particular, in a refrigerant condenser for cooling a gas refrigerant to liquefy condensation, reinforcing a joint surface between a header constituting the header pipe and a tank and constructing a refrigerant circuit in the header pipe. It relates to a heat exchanger reinforcement for preventing the coupling portion of the header and the tank by the weight of the inlet and outlet pipe and the bracket for coupling the condenser to the vehicle body, and a manufacturing method thereof.

In general, a condenser includes a plurality of header pipes which face each other and are opposed to each other, a plurality of tubes arranged vertically between the header pipes and connected at both ends thereof, and cooling fins alternately thermally coupled between the tubes. The header pipe is formed of a header having a semi-elliptic shape in which a tube is inserted into and coupled to the header, and a tank which is divided into the header to form a flow path of a refrigerant, and they are brazed in a high temperature atmosphere in a state where they are mutually coupled. This completes the heat exchanger.

In the header pipe of the condenser configured as described above, in the related art, the end of the tank 33 is brought into close contact with the inner circumferential surface of the semi-elliptical header 32 into which the tube 31 is inserted as shown in FIG. have.

However, according to the header pipe coupling method, the end of the tank 33 is not in close contact with the plate 32a of the header 32, that is, it can be brazed in a coupling state in which a constant gap G is maintained as shown in the drawing. In this case, even though the joints of the header 32 and the tank 33 are melted with each other, the brazing joint is not made even though the clads are melted, and the bonding strength between the two is weakened. Can be.

In addition, in the condenser composed of a combination of several units as described above, even if the junction between the header and the tank is in close contact and brazing, the external connection such as the inlet and outlet pipe for configuring the refrigerant circuit in the tank of the header pipe and the bracket for coupling the condenser to the vehicle body. Due to the weight by the connecting means such as the means, a gap may occur in the coupling portion, and furthermore, there is a problem in that an accurate test result due to pressure leakage may not be obtained during the P cycle test.

The present invention has been made in view of this point, and an object of the present invention is to provide a heat exchanger reinforcement table that prevents assembly failure of joints that may occur when the header and tank of the condenser are temporarily coupled and improves the internal pressure of the header pipe. have.

It is another object of the present invention to provide a heat exchanger reinforcement to prevent a gap that may occur in the brazing surface of the header and the tank by the weight of the connecting means fastened to the header pipe of the condenser.

Still another object of the present invention is to provide a heat exchanger manufacturing method capable of facilitating coupling of the reinforcement in fastening the reinforcement to the header pipe.

The present invention for achieving the above object is a first and second header pipe having a header and a tank, a plurality of tubes connected at both ends of the first, second header pipe, a plurality of cooling fins interposed between the plurality of tubes And a connecting means for connecting the heat exchanger to an external component of the refrigerant circuit, wherein the first and second header pipes surround the outer circumferential surface of the tank in close contact with each other and extend from an end of the main body. , 2 header pipes characterized in that fastening the reinforcing rod having a constriction portion for narrowing the outer peripheral surface edge portion of each header.

In the manufacturing method, the reinforcing rod is brazed in a state of being fastened to the header pipe. At this time, the reinforcing rod may be fastened in the transverse direction of the header pipe without bending the end of the reinforcing rod. It may be fastened by inserting it from above or below in the state of plastic working in the same shape as that of the pipe.

According to this structure, it is possible to braze in a state in which the joint surface of the header and the tank is in close contact by fastening the reinforcing rod after the header pipe and the tank of the header pipe are temporarily joined.

1 is a front view of a condenser showing an embodiment according to the present invention,

2 is a cross-sectional view taken along line A-A of FIG. 1 showing a main part according to a first embodiment of the present invention;

3 is a perspective view of the clip according to the present invention,

4 is a cross-sectional view showing a fastening method of a second embodiment according to the present invention;

5 is a cross-sectional view showing a coupling relationship of a conventional header pipe.

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

1; condenser 2; tube

3; corrugated pin 4; first header pipe

5; second header pipe 4a, 5a; header

4b, 5b; tank 12; reinforcing rod

12a; body 12b; stenosis

1 is a cross-sectional view of the condenser showing an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line A-A of Figure 1, Figure 3 is a perspective view showing a reinforcing table of the present invention.

The condenser, denoted by 1, forms a heat exchanger by a plurality of tubes 2 arranged in a horizontal direction and corrugated fins 3 thermally coupled therebetween, and opposite sides of the tubes 2 face each other. A pair of upright first header pipes 4 and second header pipes 5 are coupled.

The tube 2 is a flat tube having a plurality of refrigerant passages formed therein, and is manufactured by extrusion molding or press molding, and the first and second header pipes 4 and 5 are semi-elliptical in shape. An elliptical header 4a, 5a and a divided portion of the tanks 4b, 5b are combined to form a refrigerant passage having a constant diameter.

Each of the headers 4a and 5a is inserted into and coupled to both ends of the plurality of tubes 2, and tanks 4b and 5b are coupled to the outside thereof. The first and second header pipes 4 and 5 are partitioned by a plurality of baffles 6-8 to form a fluid passage in a multi-room. According to an embodiment, the first header pipe 4 has a gas state. The inlet pipe (9) into which the refrigerant flows in and the outlet pipe (10) through which the liquid refrigerant converted by phase heat exchange with the outside air in the heat exchange part are respectively coupled. In the first and second header pipes 4 and 5, the outlet pipe may be coupled to the second header pipe depending on the arrangement position or installation location of the baffles 6-8. Reference numeral 11 in the figure shows a cap for sealing the upper and lower openings of the header pipe.

In addition, the present invention provides a uniform assembly interval between the header (4a) (5a) and the tank (4b) (5b) by fastening a plurality of reinforcing rods 12 on the outer peripheral surface of the first and second header pipe (4) (5). To keep things going. The plurality of reinforcing rods 12 fastened to the first and second header pipes 4 and 5 have the same shape, and the following description will be given of the reinforcing rods fastened to the first header pipe 4.

The reinforcing rod 12 has a cross section having the same curvature of the inner circumferential surface as the outer circumferential surface of the tank 4b to increase the coupling force to closely surround the header 4a and the tank 4b of the first header pipe 4. It has a main body 12a made of an elliptical shape, and both ends of the main body 12a include a constriction portion 12b for constricting them in a state where the header 4a and the tank 4b are coupled, and the overall shape is symmetrical. .

The constriction portion 12b has the same shape as the plate 4c which is bent outward so that both ends of the header 4a, that is, the end of the tank 4b can be inserted into and contact with each other, and the end portion thereof has the tube 2. It is bent toward and has a shape surrounding a portion of the rear edge of the header 4a. The reinforcing rod 12 may be coated with a clad material on the inner surface after processing, or may be pressed into a predetermined shape after forming the clad on one side of the plate before processing.

The reinforcing rod 12 configured as described above is fastened upward or downward in a state in which the header 4a and the tank 4b are coupled to each other. In this case, when the header 4a and the tank 4b are not completely in contact with each other, Since a tolerance occurs, the reinforcement 12 cannot be inserted.

Therefore, the reinforcing rod 12 may be coupled only when the header 4a and the tank 4b are completely in close contact, and thus, may occur between the plate 4c of the header 4a and the end of the tank 4b during the conventional temporary coupling. It is possible to prevent the gap, which is then brazed integrally in a state in which the cap 11 which seals the opening of both ends of the header pipe 4 is fastened.

Since the first and second header pipes 4 and 5 brazed by this method can also serve to correspond to the high pressure refrigerant pressure by the reinforcing rod 12, this causes the header 4a and the tank 4b. It can also reduce the thickness of the raw material to save the advantage.

In addition, even when the joint between the header and the tank is in close contact with each other, the gap is generated due to the weight of external connection means such as an inlet and outlet pipe for forming a refrigerant circuit in the tank of the header pipe and a bracket for coupling the condenser to the vehicle body. Can be prevented.

Meanwhile, in the present invention, after fastening the reinforcing rod 12 to the header 4a and the tank 4b, pressing the end portion of the constriction portion 12b with a press against the coupling direction of the header 4a and the tank 4b. It may further include, in this case it is possible to strengthen the contact state of the contact surface of the header (4a) and the tank (4b).

Figure 4 shows a second embodiment showing a fastening method of the reinforcing bar according to the present invention, unlike the first embodiment to enable to fasten the reinforcing bar 20 in the side of the header pipe, such a method as shown As described above, the body 21 is formed with the same curvature as the outer circumferential surface of the tank 4b as in the reinforcing bar of the first embodiment, and both ends of the body 21 are bent in two stages to form the constriction part 22.

In the method of fastening the reinforcing bar 20 configured as described above to the header pipe, after the header 4a and the tank 4b are temporarily coupled in the same manner as in the embodiment, the main body 21 of the reinforcing bar 20 is connected to the header pipe. It closely contacts with the outer peripheral surface of the tank 4b. Thereafter, the ends of the constriction parts 22 are pressed and bent in the cross direction, and then pressed again in the coupling direction of the header 4a and the tank 4b to be brazed and coupled to keep the coupling state of the header pipes closely.

As described above, the present invention is to enable the brazing of the same type to be integrally brazed on the outer circumferential surface of the header pipe so as to uniformly maintain the coupling interval of the header pipe consisting of the header and the partition of the tank and increase the internal pressure. As in the first embodiment, the reinforcing rod may be processed in the same manner as the shape of the header pipe, and then temporarily coupled to the upper side or the lower side of the header pipe, or may be pressed against the side of the header pipe, and then the end portion may be compressed by a press.

When the reinforcing rod is fastened to the header pipe, the header and the tank may be in close contact to prevent the occurrence of gaps in the contact portion, thereby increasing the bonding force when brazing and at the same time countering the high pressure refrigerant pressure.

And even when the joint between the header and the tank is in close contact, the gap is generated by the weight of external connection means such as the inlet and outlet pipe for forming the refrigerant circuit in the tank of the header pipe and the bracket for coupling the condenser to the vehicle body. Can be prevented.

Claims (6)

First and second header pipes having a header and a tank, a plurality of tubes connected at both ends of the first and second header pipes, a plurality of cooling fins and heat exchangers interposed between the plurality of tubes, and external components of the refrigerant circuit. In the heat exchanger comprising a connecting means for connecting with, A main body which surrounds the tank outer circumferential surfaces of the first and second header pipes in close contact; And Reinforcing plate for heat exchangers for maintaining the close connection state of the header pipes including a narrowing portion for narrowing the outer peripheral surface edge portions of the header of each of the first and second header pipes in a direction facing the main body. The reinforcing rod for heat exchangers according to claim 1, wherein a clad is applied to an inner surface of the reinforcing rod. First and second header pipes having a header and a tank, a plurality of tubes connected at both ends of the first and second header pipes, a plurality of cooling fins and heat exchangers interposed between the plurality of tubes, and external components of the refrigerant circuit. In the heat exchanger comprising a connecting means for connecting with, A reinforcement having a main body that closely surrounds the outer circumferential surface of the tanks of the first and second header pipes to the header pipe, and a constriction portion extending from an end of the main body to narrow the edge of the outer circumferential surface of each header of the first and second header pipes. Combining; And And brazing the header pipe in a state in which the reinforcing rod is coupled. The heat exchanger manufacturing method according to claim 3, wherein the reinforcing rod is formed in the same shape as that of the header pipe and inserted from the top, and the end portion of the constriction portion is compressed in a direction facing the main body. 4. The method of claim 3, wherein after the reinforcing bar is coupled to the side of the header pipe, the end portion of the constriction part is compressed in a direction facing the main body. The method of claim 4 or 5, wherein a cladding layer is applied to an inner surface of the reinforcing rod.