JP2013000776A - Method and apparatus for manufacturing heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing a heat exchanger by which insertion resistance is reduced and manufacture is performed easily when a heat transfer pipe is inserted into the communicative hole of the heat exchanger.SOLUTION: In the method for manufacturing the heat exchanger provided with integrated fins 1 which are constituted by laminating fins 4 on which a hole is formed, the communicative hole 1a is formed with the holes which are formed on the respective fins 4 on the integrated fin 1, the heat transfer pipe 2 which is inserted into the communicative hole 1a is connected to a nozzle 20, the nozzle 20 is connected with a passage pipe 30 and a discharging hole 20b for discharging compressed fluid 40 which flows from the passage pipe 30 to the communicative hole 1a is formed. With the movement of passage pipe 30 in a state where a compressed fluid 40 is discharged from a discharge hole 20b, a heat transfer pipe 2 is inserted in a desired position in the communicative hole 1a without the nozzle 20 and the heat transfer pipe 2 being in contact with the communicative hole 1a.

Description

  The present invention relates to a heat exchanger manufacturing method and a manufacturing apparatus.

  Conventionally, the heat exchanger is temporarily assembled by inserting a heat transfer pipe into a communication hole formed as an integrated fin formed by stacking a plurality of fins formed by arranging a plurality of holes.

  Since the communication holes formed in the integrated fins are aggregates of single fins formed by arranging a plurality of holes, it is difficult to align the holes formed in the single fins on the same core in the stacking direction, If a heat transfer pipe is inserted into the communication hole here, the insertion tip of the heat transfer pipe comes into contact with each other due to the step difference of the individual holes that are displaced due to the accumulation of the fins, and the insertion resistance is reduced. In addition to the increase, it becomes impossible to insert in the long run, and it becomes a problem that the heat transfer pipe insertion work is hindered.

  In order to ensure a high insertion rate of the heat transfer pipe for the communication holes that have been displaced due to the accumulation of fins in this way, the pipe tip avoids contact with individual plate fin steps. For example, a method of guiding and inserting the heat transfer pipe can be used.

  For example, Patent Document 1 discloses a technique for preventing a fin step from being caught as much as possible by bringing a heat transfer pipe tip into contact with a streamline head joined to a guide rod tip and guiding it into the communication hole. Has been.

JP-A-9-108760

  However, if the heat transfer pipe is guided and inserted into the communication hole by the method described in Patent Document 1, the fin portion in which the position of each hole is displaced by accumulating the fins, and the heat transfer pipe provided in the streamline head Sliding contact is inevitable due to the maximum diameter portion having an intermediate value between the inner diameter of the insertion hole and the outer diameter of the heat transfer pipe. Further, since the guide rod obtains a gap in the direction opposite to the gravity direction by its own weight, it has a structure that is easily slidable in the gravity direction.

  That is, the streamline head for guiding and inserting the heat transfer pipe has a structure in which the influence of gravity cannot be avoided and is easily subjected to the resistance due to the above-mentioned sliding. For this reason, there is a risk of damaging the inner surface of the collar hole of the fin due to the above-mentioned sliding. For example, if multiple heat transfer pipes are inserted at the same time, the sliding resistance increases, so that the insertion is difficult or impossible. There is a problem that disturbs.

  It is an object of the present invention to provide a heat exchanger manufacturing method or a manufacturing apparatus that can reduce the insertion resistance and can be easily manufactured when a heat transfer pipe is inserted into a communication hole of a heat exchanger. .

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-described problems. To give an example, a method for manufacturing a heat exchanger having integrated fins configured by stacking fins having holes formed therein is described. In the integrated fin, a communication hole is formed by the hole formed in each fin, the heat transfer pipe inserted into the communication hole is connected to the nozzle, the nozzle is connected to the flow path pipe, A discharge hole for discharging the compressed fluid flowing from the flow path tube to the communication hole is formed, and the nozzle and the heat transfer pipe are connected to the communication hole by moving the flow path pipe in a state where the compressed fluid is discharged from the discharge hole. The heat transfer pipe is inserted into a desired position in the communication hole without contact.

ADVANTAGE OF THE INVENTION According to this invention, when inserting a heat-transfer pipe into the communicating hole of a heat exchanger, the manufacturing method or manufacturing apparatus of a heat exchanger which can reduce insertion resistance and can manufacture easily can be provided. .
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is sectional drawing which shows the state which the guide nozzle and the heat-transfer pipe contact | abutted in the integration | stacking fin. It is a perspective view which shows the single fin shape which comprises an integrated fin. It is an external view of the pipe insertion method in Example 1. The perspective view which shows the latching position state by operation | movement of the principal part in Example 1. FIG. It is an external view of the heat exchanger which comprises the integrated fin to which Example 1 is applied, and a heat-transfer pipe. It is a schematic diagram which shows the discharge direction of a pressure fluid. It is sectional drawing which shows the state which cut | disconnected the guide nozzle in the direction orthogonal to a pipe insertion direction. It is sectional drawing which shows the state which cut | disconnected the guide nozzle in the pipe insertion direction. It is a guide nozzle channel sectional view.

  Hereinafter, examples will be described with reference to the drawings.

  FIG. 5 is an external view of a heat exchanger 3 comprising an integrated fin 1 and a heat transfer pipe 2 to which the present embodiment is applied. The heat transfer pipe 2 is inserted into a communication hole 1 a formed in the integrated fin 1. To do. In addition, the heat-transfer pipe 2 in embodiment is illustrated by the U-shaped pipe shape.

  FIG. 2 shows the shape of a single fin 4 constituting an integrated fin, and the fin 4 has a plurality of flange holes 4a arranged in a collar hole 4a. Accordingly, the collar holes 4a are configured as the communication holes 1a by accumulating the fins 4 alone.

  FIG. 3 shows the appearance of the pipe insertion method in this embodiment. The integrated fins 1 are set on the table 10 and the movable plate front 11a and the movable plate rear 11b are arranged on both sides as the stacking direction of the integrated fins. The movable plate right 11c and the movable plate left 11d are provided on both surfaces orthogonal to the direction, and the movable plate 11e is provided on the upper surface facing the table, respectively, so that the integrated fin 1 is slightly movable. And fix. At this time, the range in which the fin can be finely moved is preferably about 80 to 150% of the material thickness of the fin 4 alone. Here, the heat transfer pipe 2 is disposed from the guide nozzle 20 joined to one end of the flow path pipe 30 on the same axis as the communication hole 1a and the facing direction thereof. Since the integrated fins 1 are fixed in this way, it is possible to easily insert the heat transfer pipe 2 described later.

  FIG. 4 is a perspective view showing the locking position state by the operation of the main part in this embodiment, and the guide nozzle 20 joined to one end of the flow channel tube 30 is inserted into the communication hole 1 a constituting the integrated fin 1. The state where the head is located from the heat transfer pipe insertion side in the opposite direction is the locking position. Here, the heat transfer pipe 2 is fed together with the guide nozzle 20 to the insertion side of the guide nozzle 20 while bringing the heat transfer pipe tip 2a having a U-shaped shape into contact with the guide nozzle tip 20a. Are sequentially repeated in the communication hole 1a.

  FIG. 1 is a cross-sectional view showing a state in which the guide nozzle 20 and the heat transfer pipe 2 are in contact with each other in the communication hole 1 a constituting the integrated fin 1, and is made smaller than the inner diameter of the communication hole 1 a through the flow passage tube 30. The pressure fluid 40 discharged from the injection port 20b provided around the outer periphery of the guide nozzle 20 covers the inner peripheral surface of the communication hole 1a and the gap in the vicinity of the guide nozzle 20 and the heat transfer pipe tip 2a. . This action floats the communication hole 1a and presses and fixes the integrated fin 1 to the heat transfer pipe insertion side. Here, the pressure fluid 40 is preferably a gas such as compressed air.

  As described above, the manufacturing method of the heat exchanger according to the present embodiment is a manufacturing method of the heat exchanger including the integrated fins 1 configured by stacking the fins 4 in which the holes 4a are formed. In the fin 1, a communication hole 1 a is formed by a hole 4 a formed in each fin 4, and the heat transfer pipe 2 inserted into the communication hole 1 a is connected to the nozzle 20. Further, the nozzle 20 is connected to the flow channel tube 30, and a discharge hole 20 b for discharging the compressed fluid 40 flowing from the flow channel tube 30 to the communication hole 1 a is formed, and the compressed fluid 40 is discharged from the discharge hole 20 b. By moving the flow path pipe 30 in the state, the heat transfer pipe 2 is inserted into a desired position in the communication hole 1a without the nozzle 20 and the heat transfer pipe 2 being in contact with the communication hole 1a.

  As a result, when the heat transfer pipe 2 is inserted into the communication hole 1a in the manufacturing process of the heat exchanger, the possibility that the heat transfer pipe contacts the communication hole can be reduced. It becomes possible to facilitate insertion. Since the integrated fins 1 are formed in a state in which the position of each collar hole is shifted by stacking the fins 4, particularly when the heat transfer pipe 2 is inserted into the communication hole 1 a, the position where the position shift is generated. In many cases, contact with the heat transfer pipe 2 occurred. Therefore, according to the above-described embodiment, since the possibility of contact as described above can be reduced, the heat transfer pipe 2 can be easily inserted, and the heat exchanger can be manufactured more easily. .

Next, details of the action of the pressure fluid 40 will be described.
FIG. 6 is a schematic view showing the discharge direction of the pressure fluid 40. The pressure fluid 40 discharged from the injection port 20b provided on the outer periphery of the guide nozzle 20 through the flow path tube 30 is expressed as the pressure fluid Fx40a and the pressure fluid. Vector decomposition into Fy40b. The vector-decomposed pressure fluid Fy40b vertically presses the inner peripheral surface of the communication hole 1a, so that the guide nozzle 20 and the vicinity of the heat transfer pipe tip 2a float on the inner peripheral surface of the communication hole 1a. That is, the discharge hole 20b is preferably formed such that the compressed fluid 40 from the discharge hole 20b is discharged in the direction of 0 ° <θ2 <90 ° with respect to the insertion direction of the nozzle 20.

  In this case, as shown in a cross-sectional view of the guide nozzle 20 shown in FIG. 7 cut in a direction perpendicular to the pipe insertion direction, there are at least three or more injection ports 20b provided on the outer peripheral surface of the guide nozzle 20. Desirably, the holes are arranged in a radially uniform angle θ1 toward the inner periphery of the communication hole 1a. That is, when the communication hole 1a is viewed from the front, the compressed fluid 40 can be discharged to the circumferential surface of the communication hole 1a by being formed at an equal angle θ1 with respect to the circumferential direction. The heat transfer pipe 2 can be inserted into a desired position in the communication hole 1a without contacting the communication hole 1a.

  Furthermore, the fin 4 is pressed to the heat transfer pipe insertion port side by the pressure fluid Fx40a which is vector-decomposed in FIG. 6, and the pressing and fixing of the integrated fin 1 can be realized. In this case, as described above, the flow path angle θ2 of the injection port 20b is formed in the range of 0 ° <θ2 <90 ° toward the heat transfer pipe insertion port side.

  In other words, at least three or more injection ports 20b provided on the guide nozzle 20 are formed, arranged radially at an equal angle θ1 toward the inner periphery of the communication hole 1a, and connected to the injection port 20b. The flow path angle θ2 to be provided is formed in the range of 0 ° <θ2 <90 ° toward the heat transfer pipe insertion port side. If the direction of the pressure fluid 40 to be discharged is vector-decomposed, the communication hole 1a is formed. The pressure fluid Fy40b that presses the inner periphery and the pressure fluid Fx40a that presses toward the heat transfer pipe insertion port side are generated.

  Therefore, in the heat transfer pipe insertion process, the fins 1 stacked up to the portion where the insertion of the heat transfer pipe 2 is completed are pressed and fixed by the pressure fluid 40, and at the heat transfer pipe tip 2 a, the fluid wall Since it becomes hollow floating, it is possible to reduce the pipe insertion resistance. Therefore, the heat transfer pipe insertion rate is increased, and eventually the heat exchanger can be easily manufactured.

  Since the fin 4 formed with the collar hole 4a is different in material thickness, shape, material, and the like, when it is desirable only to float the inner peripheral surface of the communication hole 1a, the discharged pressure fluid 40 is only the pressure fluid Fy40b. Necessary. In this case, if the flow path angle θ2 for engaging the injection port 20b is 90 ° with respect to the insertion direction of the heat transfer pipe 2, the vector decomposition of the pressure fluid does not occur and the discharge is performed in a certain direction. Can do. When only the pressure fluid Fx40a is required, it is sufficient to discharge (θ1 = 0 °) toward the heat transfer pipe insertion port side.

  That is, the discharge hole 20b may be formed such that the compressed fluid 40 from the discharge hole 20b is discharged from a substantially vertical direction with respect to the circumferential surface of the communication hole 1a. Alternatively, the discharge hole 20b may be formed such that the compressed fluid 40 from the discharge hole 20b is discharged in a substantially vertical direction with respect to the insertion direction of the heat transfer pipe 2. As a result, the heat transfer pipe 2 can be inserted without contacting the inner peripheral surface of the communication hole 1a configured in a state in which the position of the individual collar holes 4a is shifted, so that the insertion resistance can be reduced. Become.

  In the present embodiment, the discharge holes 20b provided on the outer periphery of the guide nozzle 20 have been described with respect to the angles θ1 and θ2 formed in the heat transfer pipe insertion port side direction. Since the shape, material, and the like are different, the same effect may be obtained as angles θ1 and θ2 (not shown) formed in the direction toward the guide nozzle insertion port, which is the direction opposite to this.

  As described above, in the manufacturing method of the heat exchanger of the present embodiment, the guide nozzle is joined to one end of the flow path tube, the tip end of the guide nozzle and the insertion tip of the heat transfer pipe are brought into contact with each other, and the integrated fin is attached. When the guide hole is inserted into the communication hole, the heat transfer pipe is formed by a pressure fluid discharged from an injection port that is connected to the outer diameter of the guide nozzle in a gap in which the outer diameter of the guide nozzle is smaller than the inner diameter of the communication hole. By reducing sliding resistance and pressing and fixing fins, a high insertion rate of the heat transfer pipe can be secured.

  According to this, the pressure fluid that has passed through the inside of the flow pipe is discharged from the outer peripheral surface of the guide nozzle joined to one end thereof, and the gap between the inner peripheral surface of the fin communication hole and the guide nozzle and the heat transfer pipe insertion tip is included. It will be. Accordingly, the guide nozzle and the heat transfer pipe float on the inner peripheral surface of the communication hole by the discharged pressure fluid, and the fin is fixed by the action of pressing the fin. By this means, the heat transfer pipe can pass through the inner peripheral surface of the communication hole without making contact, and therefore the insertion resistance can be reduced.

  Further, a heat exchanger manufacturing method employing the above heat exchanger manufacturing method will be described. A heat exchanger manufacturing apparatus including integrated fins 1 formed by laminating fins 4 having holes 4a formed therein. In the integrated fin 1, a communication hole 1 a is formed by a hole 4 a formed in each fin 4, and the nozzle 20 connected to the heat transfer pipe 2 inserted into the communication hole 1 a, A flow path pipe 30 that is connected and sends compressed fluid to the nozzle 20, and the compressed air 40 from the flow path pipe 30 is discharged from the discharge hole 20 b formed in the nozzle 20 to the communication hole 1 a. The Further, in a state where the compressed fluid is discharged from the discharge hole 20b, the heat transfer pipe 2 is inserted into a desired position in the communication hole 1a without the nozzle 20 and the heat transfer pipe 2 being in contact with the communication hole 1a. It becomes a heat exchanger manufacturing apparatus provided with the control means to control.

  Although the present embodiment has been described above, the specific structure for inserting the heat transfer pipe is not necessarily limited to the embodiment, and any structure that can exhibit a predetermined function may be used. For example, as shown in the cross-sectional view of the guide nozzle shown in FIG. Further, the heat transfer pipe outer peripheral tip may be constrained, or the flow path 20c for engaging the injection port 20b as shown in the cross-sectional view of the guide nozzle flow path shown in FIG. 9 may be inserted in a spiral shape.

  Further, in this embodiment, the inside of the communication hole 1a is floated by the pressure fluid, but the guide nozzle 20 may be a magnet, and the integrated fin 1 constituting the communication hole 1a may be a conductive body. That is, the heat transfer pipe 2 is connected to a moving means (not necessarily a flow path pipe), and the moving means includes a magnet that repels the communication hole 1a, and the heat transfer pipe 2 is moved by moving the moving means. The heat transfer pipe 2 is inserted into a desired position in the communication hole 1a without coming into contact with the communication hole 1a. Therefore, the heat transfer pipe 2 may float due to the electromagnetic transfer induction action of the guide nozzle 20 that moves through the communication hole 1a. Therefore, the same effect as that of the pressure fluid can be obtained.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

DESCRIPTION OF SYMBOLS 1 Integrated fin 1a Communication hole 2 Heat transfer pipe 2a Heat transfer pipe tip 3 Heat exchanger 4 Fin 4a Collar hole 10 Table 11a Movable plate front 11b Movable plate rear 11c Movable plate left 11d Movable plate right 11e Movable plate upper 20 Guide nozzle 20a Guide nozzle tip 20b Injection port 20 Channel 30 Channel tube 40 Pressure fluid 40a Pressure fluid Fx
40b Pressure fluid Fy

Claims (9)

A method of manufacturing a heat exchanger having integrated fins configured by laminating fins in which holes are formed,
In the integrated fin, a communication hole is formed by the hole formed in each fin,
The heat transfer pipe inserted into the communication hole is connected to the nozzle,
The nozzle is connected to a flow path pipe, and a discharge hole for discharging the compressed fluid flowing from the flow path pipe to the communication hole is formed.
By moving the flow path tube in a state where the compressed fluid is discharged from the discharge hole, the heat transfer pipe is moved to a desired position in the communication hole without the nozzle and the heat transfer pipe being in contact with the communication hole. A method of manufacturing a heat exchanger, wherein the heat exchanger is inserted into a position. In the manufacturing method of the heat exchanger of Claim 1,
The fin is formed with a plurality of the holes side by side,
A method of manufacturing a heat exchanger, wherein a plurality of communication holes are formed in each of the plurality of holes by laminating the fins on the integrated fins. In the manufacturing method of the heat exchanger of Claim 1,
The method of manufacturing a heat exchanger, wherein the discharge hole is formed such that the compressed fluid from the discharge hole is discharged from a direction substantially perpendicular to the circumferential surface of the communication hole. In the manufacturing method of the heat exchanger of Claim 1,
The discharge hole is formed so that the compressed fluid from the discharge hole is discharged in a substantially vertical direction with respect to the insertion direction of the heat transfer pipe. In the manufacturing method of the heat exchanger of Claim 1,
The method for manufacturing a heat exchanger, wherein the discharge hole is formed such that the compressed fluid from the discharge hole is discharged in a substantially vertical direction with respect to an insertion direction of the nozzle. In the manufacturing method of the heat exchanger of Claim 1,
The method of manufacturing a heat exchanger, wherein the discharge hole is formed such that the compressed fluid from the discharge hole is discharged at an angle of 0 ° <θ2 <90 ° with respect to the nozzle insertion direction. In the manufacturing method of the heat exchanger in any one of Claims 1-6,
The method for manufacturing a heat exchanger, wherein the nozzle has three or more discharge holes formed at an equal angle θ1 with respect to a circumferential direction of the communication hole. A heat exchanger manufacturing apparatus including integrated fins configured by laminating fins in which holes are formed,
In the integrated fin, a communication hole is formed by the hole formed in each fin,
A nozzle connected to a heat transfer pipe inserted into the communication hole;
A flow path pipe connected to the nozzle and sending a compressed fluid to the nozzle,
The compressed air from the channel pipe is discharged from the discharge hole formed in the nozzle to the communication hole,
Further, in a state where the compressed fluid is discharged from the discharge hole, the heat transfer pipe is inserted into a desired position in the communication hole without the nozzle and the heat transfer pipe being in contact with the communication hole. A heat exchanger manufacturing apparatus comprising control means for controlling. A method of manufacturing a heat exchanger having integrated fins configured by laminating fins in which holes are formed,
In the integrated fin, a communication hole is formed by the hole formed in each fin,
The heat transfer pipe inserted into the communication hole is connected to the moving means,
The moving means includes a magnet that repels the communication hole,
By moving the moving means, the heat transfer pipe is inserted into a desired position in the communication hole without contacting the heat transfer pipe with the communication hole.