JP2003322493A - Method for manufacturing heat exchanger, tool used for the method and heat exchanger manufactured by the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a heat exchanger capable of largely reducing the number of assembling steps, connecting a flow pipe precisely and securely and improving the quality, to provide a tool used for the method, and to provide a high-quality inexpensive heat exchanger. <P>SOLUTION: This heat exchanger 1 is manufactured by a method comprising a closing tube planting step of planting a closing tube 15 in a recess 31 by using a positioning/guiding tool 40 for positioning and guiding the closing tube 15 to the recess 31 of a base plate 35, a connecting step of connecting the closing tube 15 to the base plate 35 by melting a brazing-filler 34 filled in the recess 31 with the recessed face of the recess 31 at the bottom after the closing tube planting step, a closing part removing step of removing at least a closing part 15b and making the closing tube 15 a flow pipe 4 after the connecting step, and a step of connecting the main body parts 7, 8 of tanks 2, 3 to the base plate 35 so as to communicate the tanks 2, 3 with the flow pipe 4 after the closing part removing step. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat exchanger suitable mainly for cooling electronic equipment, a jig used for the manufacturing method, and a heat manufactured by the manufacturing method. It is about the exchanger.

[0002]

2. Description of the Related Art In recent years, the processing capacity and speed of electronic equipment have been rapidly increasing, and the heat density tends to increase. It is necessary to use electronic components within a certain temperature range, and if cooling is not sufficient, malfunctions such as malfunctions will occur, so heat countermeasures are important. Generally, in a device (for example, a control panel) configured by collecting various electronic devices, the electronic devices are compactly housed in a housing,
It is often difficult to ensure sufficient heat dissipation. Therefore, a method of using a compact and high-efficiency heat exchanger is used for cooling electronic devices and the like in the apparatus.

As a heat exchanger used in the above cooling method,
There is a partition plate type in which a high-temperature fluid and a low-temperature fluid flow through a pipe or a plate, and the flow direction of the fluid is classified into a cross flow type. This heat exchanger mainly includes an upper tank, a lower tank, and a core portion including a large number of thin tubes that guide the cooling fluid in the upper tank to the lower tank. In this heat exchanger, the cooling fluid that has absorbed heat from the electronic device is guided to the upper tank, and the cooling fluid sent into the upper tank passes through the narrow tube and is absorbed by the electronic device while being guided to the lower tank. Is dispersed in the atmosphere and cooled, and the cooling fluid thus cooled is once stored in the lower tank and then circulated to cool the electronic device and the like again. As described above, by configuring the core portion used for heat dissipation with a large number of thin tubes, a compact and highly efficient heat exchanger can be obtained.

Heretofore, in manufacturing the heat exchanger, an operator manually brazes the thin tubes connecting the upper tank and the lower tank one by one.

[0005]

However, in the above-mentioned conventional manufacturing method, since the worker performs the work of connecting the thin tubes one by one, it requires a great number of man-hours and a lot of labor for the worker. There is a problem that the work efficiency is not good as well as it is forced. Also, from the viewpoint of compactness, the thin tubes are densely arranged in a limited space, so it is difficult to join the thin tubes accurately, and the operator must use excessive nerves to ensure quality. There are also problems. Further, since the number of work steps is large and the degree of difficulty is high, there is a problem that the cost of the obtained heat exchanger is high.

The present invention has been made in order to solve such problems, and it is possible to significantly reduce the number of assembling steps and to improve the quality by accurately and surely connecting the distribution pipes. It is an object of the present invention to provide a heat exchanger manufacturing method that can be performed and a jig used in the manufacturing method, and to provide a high quality and low cost heat exchanger.

[0007]

In order to achieve the above object, a method of manufacturing a heat exchanger according to a first aspect of the present invention is a method of manufacturing a heat exchanger including a tank for storing a heat transport fluid. A step of closing a required end of the tubular member to form a closed portion to obtain a closed tube, and forming a recess for receiving an end portion including the closed portion of the closed tube in the plate member to form a base plate. And (a) implanting the closed pipe in the recess using a positioning / guide jig that positions and guides the closed pipe in the recess. (B) After the step of implanting the closed pipe, the wax filled in the recess is melted with the recessed surface of the recess being the bottom to join the closed pipe and the base plate. Joining step, (c) after this joining step,
A step of removing at least the closed portion and using the closed pipe as a flow pipe, (d) after the step of removing the closed portion,
The method is characterized by including a step of connecting a main body portion of the tank and the base plate so that the tank and the flow pipe are communicated with each other.

According to the present invention, since the wax is filled in the concave portion of the base plate and the closing pipe is planted in the concave portion through the positioning / guide jig, the closing pipe is fixed at a predetermined position of the base plate. It can be easily and quickly tacked. Since the closing tube and the base plate are joined after being temporarily attached in this way, there is an effect that the closing tube can be joined to the base plate accurately. Further, since the required end portion of the closed pipe is the closed portion, the wax melted in the joining process does not enter the inside of the closed pipe. Therefore, it is possible to reliably join the closed tube and the base plate with an appropriate amount of wax filled in the recess. In the present invention, in such a structure in which the closed tube and the base plate are joined together, the step of removing at least the closed portion of the closed tube is performed so that the closed tube can pass a heat transfer fluid. That is, it is a distribution pipe. After that, the main body portion of the tank and the base plate are coupled so that the flow pipe and the tank for storing the heat transport fluid communicate with each other.
Therefore, according to the present invention, the number of assembling steps can be significantly reduced, and the distribution pipes can be accurately and surely connected to improve the quality.

Next, a method for manufacturing a heat exchanger according to a second aspect of the present invention is a method for manufacturing a heat exchanger having a tank for storing a heat transport fluid, in which a straight tubular member is bent,
A step of obtaining a bent pipe in which straight pipe portions and bent pipe portions are alternately arranged and the bent pipe portions are continuous while changing the bending direction; and a base formed by forming a recess for receiving the bent pipe portion in the plate member. In addition to the step of obtaining a plate and the step of filling the concave portion with wax, (a) using the positioning / guide jig for positioning and guiding the bending tube with respect to the concave portion, Bending pipe planting step of implanting, (b) After this folding pipe implanting step, the wax filled in the recess is melted in a state where the recessed surface of the recess is at the bottom to separate the bending pipe and the base plate. Joining step of joining, (c) after this joining step, at least the bent tube section is removed, and the bent tube section removal step in which the straight tube section serves as a flow tube, (d) after this bent tube section removal step, Connect the tank and the distribution pipe As to, it is characterized in that it comprises the step of coupling the base plate and the body portion of the tank.

The present invention relates to another aspect of the first aspect of the present invention, but the gist thereof is one. Therefore, the same effect as the first aspect of the invention is obtained.

Next, a jig used in the method for manufacturing a heat exchanger according to the third invention is the positioning / guide jig according to the first invention or the second invention, and comprises a plurality of reciprocating rod-shaped members. When these rod-shaped members are extruded, the rod-shaped members are assembled in a lattice shape, and the space surrounded by the adjacent rod-shaped members is formed so as to correspond to the concave portion of the base plate. It is a feature.

According to the present invention, when a plurality of reciprocating rod-shaped members are extruded, the rod-shaped members are assembled in a lattice shape, and the space surrounded by the adjacent rod-shaped members corresponds to the recess of the base plate. Since the closed pipe (or bent pipe) is inserted into the space, the rod-shaped member forming the space continuously positions the closed pipe (or bent pipe) into the recess. You can be surely guided.

Next, the heat exchanger according to the fourth invention is characterized by being manufactured by the method for manufacturing a heat exchanger according to the first invention or the second invention.

According to the present invention, as compared with the conventional manufacturing method, the number of assembling steps is small and the manufacturing method is capable of surely connecting the closed pipe (or the bent pipe). An exchange can be provided.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a method for manufacturing a heat exchanger according to the present invention, a jig used in the manufacturing method, and a heat exchanger manufactured by the manufacturing method will be described with reference to the drawings. The description will be made with reference.

FIG. 1 is a view showing a heat exchanger according to an embodiment of the present invention, which is an external view (a), a partially cutaway view (b) of (a), and a functional explanatory view (c). Are shown respectively. Further, FIG. 2 shows a state diagram in which the heat exchanger is disassembled into coupling units at the manufacturing stage.

The heat exchanger 1 according to this embodiment is shown in FIG.
As shown in (a) and (b), a high temperature fluid and a low temperature fluid flow through a pipe or a plate, and the flow direction of the fluid is classified into a cross flow type. It is used for cooling equipment and the like. This heat exchanger 1
Is an upper tank 2 having an inlet 5 for a cooling fluid (heat-transporting fluid) and a lower tank 3 having an outlet 6 for a cooling fluid.
And a large number of flow pipes 4 that connect both tanks 2 and 3. In the heat exchanger 1, the circulation pipes 4 are provided with their longitudinal direction aligned with the vertical direction, and are arranged vertically and horizontally at a predetermined pitch. In general, the amount of heat transfer in a heat exchanger is represented by the product of the heat transfer rate, the average temperature difference between a high temperature fluid and a low temperature fluid, and the heat transfer area.
In this heat exchanger 1, a pipe having an outer diameter and an inner diameter which are significantly smaller than the length dimension of the flow pipe 4 (length: (100 m
m-several mm), outer diameter: 1.6 mm, inner diameter: 1.2 mm)
Is used, and a large number of such distribution pipes 4 are provided. In this way, by increasing the heat transfer area and increasing the amount of heat transfer, the size is made compact and the heat exchange rate is improved. The number of the distribution pipes 4 installed is determined in consideration of the heat transmission rate.

In the heat exchanger 1 thus constructed, as shown in FIG. 1 (c), the cooling fluid that has absorbed heat from the electronic equipment is introduced into the upper tank 2 through the intake port 5. While the cooling fluid sent into the upper tank 2 is guided to the lower tank 3 through the flow pipe 4, it dissipates the heat absorbed from the electronic device into the atmosphere and is cooled, and the cooling fluid thus cooled is once cooled. After being stored in the lower tank 3, it is sent and circulated through the outlet 6 to cool the electronic device and the like again.

As shown in FIG. 2, the heat exchanger 1 according to this embodiment is mainly manufactured by combining the core portion 10, the upper tank body 7 and the lower tank body 8.
That is, the core portion 10 is formed by connecting a rectangular plate-shaped upper plate 11 and a lower plate 12 which are vertically opposed to each other through the flow pipe 4, and the upper tank main body 7 is a box having a bottom central portion opened. The lower tank main body 8 has a shape and is provided with a rim that is continuous to the lower side and is formed inwardly as the joint margin 7a.
Is a mirror image of the upper tank body 7, and is provided with a joining margin 8a similarly to the upper tank body 7, and the peripheral edge of the upper plate 11 and the joining margin 7a of the upper tank body 7 are joined by brazing. , A margin 8a for joining the peripheral edge of the lower plate 12 and the lower tank body 8
Are joined in the same manner to manufacture the heat exchanger 1 as shown in FIGS. 1 (a) to 1 (c). The upper tank body 7
The lower tank body 8 is manufactured by a well-known sheet metal working means.

The core portion 10 is manufactured by a pre-assembly process, a brazing filling process, a tacking process, a joining process, a closed part removing process and a finishing process. Hereinafter, each step will be described in order.

[Pre-assembly step (1)] (FIG. 3A)
(A '), see FIG. 4) A straight tube 14 as shown in FIG. 3 (a) (length:
The required number of 100 mm, outer diameter: 1.6 mm, inner diameter: 1.2 mm) is prepared. The base pipe 14 is manufactured by subjecting a metal material such as aluminum or copper (including each alloy) having a good thermal conductivity and easily processed to a drawing process. Then, as shown in FIG. 3 (a '), the required length portion from the tip of each end portion of the raw pipe 14 is crushed and closed by, for example, a pressing machine or the like, and closed portions 15b are formed at both end portions. . In this way, the raw pipe 14 is made into a closed pipe 15 composed of a pipe portion 15a and a closed portion 15b continuous with each end of the pipe portion 15a. Then, as shown in FIG. 4, the closed pipes 15 are put into a hopper 21 of a required number of parts feeders 20, and the parts feeders 20 move the closed pipes 15 one by one to an alignment stage (not shown). Send it. At this alignment stage, the closed tube inserter 25 is adapted to slide laterally with respect to the feeding direction of the closed tube 15 by the parts feeder 20. Here, the closed tube inserter 25
Is a pallet 26 in which the required guide / alignment grooves 27 are formed.
And a fixture 28 for pressing down the closed tube 15 placed in the guide / alignment groove 27, and configured to hold the closed tube 15 in an aligned state. The pitch of the guide / alignment grooves 27 provided in the closed tube inserter 25 corresponds to the lateral pitch of the recesses 31 provided in the base plate 35 described later. further,
This alignment stage is equipped with a robot (not shown), and this robot takes out the closed pipes 15 fed by the parts feeder 20 one by one and guides and aligns grooves 27 of the closed pipe inserter 25. It is configured to leave. In this way, the closed pipe 1 put into the hopper 21
5 is sequentially filled in the closed tube inserter 25. Then, the closed pipe inserter 25 filled with the closed pipe 15 is transported to a stage where a temporary attaching process is performed later.

[Pre-assembly step (2)] (FIG. 3B)
(B ′) (c)) Furthermore, a required number of rectangular plate members 30 (material: aluminum or copper (including each alloy) etc.) having a predetermined size as shown in FIG. 3B are prepared. And FIG. 3 (b ')
As shown in FIG. 3, the recesses 31 are formed in the vertical and horizontal directions (defined below) at a predetermined pitch over the entire surface of the plate member 30. The recess 31 is a recess for receiving the closing portion 15b of the closing tube 15, and is formed by, for example, a molding process (or embossing process) by pressing. Hereinafter, the plate member 30 in which the recess 31 is formed is referred to as a "base plate 35". Although the base plate 35 is manufactured by plastic working in the present embodiment, it is of course possible to manufacture it by casting. Here, for convenience of the following description, the following definitions are made. In this base plate 35,
The surface on which the recess 31 is formed is the front surface, and the surface on the opposite side is the back surface. In addition, a portion formed by the formation of the concave portion 31, that is, the protruding portion 32 that is integrally formed with the concave portion 31 on the front and back sides is referred to as a “convex portion 32” (see FIG. 3C). When the direction is determined with reference to the base plate 35, the direction along the short side of the base plate 35 is the vertical direction, and the direction along the long side of the base plate 35 is the horizontal direction.

Here, in the closing pipe 15 obtained in the pre-assembly step (1) and the base plate 35 obtained in the pre-assembly step (2), when the closing pipe 15 is inserted into the recess 31, Cross-section 3 at 32 base position
The dimensions and the like of both are set so that the pipe portion 15a of the closed pipe 15 is present on 6 (see FIG. 9 (a)). In other words, even if the convex portion 32 including the closing portion 15b is removed after joining the closing pipe 15 and the base plate 35 in the joining process described below, at least the strength between the pipe portion 15a and the base plate 35 is high. It is designed to secure a joining margin that does not cause the above problem.

[Brazil Filling Step] (Refer to FIG. 5) As shown in FIG. 5, each recess 3 in the base plate 35.
1. Fill an appropriate amount with the wax 34. Examples of the brazing 33 used include solder and silver brazing. In this embodiment, paste-like solder is used because it is easy to handle. Recently, lead-free solder is commercially available, and the lead-less solder may be used in consideration of the environment.

Next, the tacking process will be described. In the present embodiment, this temporary attaching step mainly includes a receiving side base plate placing operation, a positioning / guide jig installing operation, a closed pipe planting operation, and a covering side base plate attaching operation. 6 (a) and 6 (b) show the work of placing the receiving side base plate and the work of installing the positioning / guide jig, and the state diagram (b) in which the grid set is assembled, respectively. , (A) showing the operation of implanting the closed pipe and (b) a state diagram in which the operation of implanting the closed pipe is completed. Further, FIG. 8 shows an explanatory view (a) of the work of attaching the cover-side base plate in the temporary attaching process and a state diagram (b) in which the lattice set is disassembled after the joining process, and FIG. 9 shows Figure 8 (b)
A cross-sectional view (a) of a main part taken along the line BB in FIG. 2 and a state diagram (b) after the closing part removing step are shown.

[Temporary Attaching Step (Receiving Side Base Plate Mounting Work and Positioning / Guide Jig Installation Work)] (FIG. 6A)
(Refer to (b)) The base plate 35 with which the recesses 31 are filled with the brazing 33 in the brazing process is placed on a dedicated processing table (not shown) (placement work of the receiving side base plate). At this time, the surface of the base plate 35 faces upward, and the recessed surface of each recess 31 becomes the bottom. Next, a positioning / guide jig 40 for positioning / guiding the closed pipe 15 is installed on the processing table (positioning / guide jig installation work).

Here, the positioning / guide jig 40 will be described. This positioning / guide jig 40 is shown in FIG.
As shown in (a), it has a plurality of rod-shaped members (whose cross-sectional shape is square, pipe-shaped, angle-shaped, etc.) 41 and 42 that are reciprocally moved in the horizontal direction. These rod-shaped members 4
1, 42 are divided into two groups. That is, a group 43 arranged on one long side of the base plate 35 placed on the processing table and a group 44 arranged on one short side of the base plate 35. The rod-shaped members 41 of the group 43 (hereinafter referred to as “vertical rod group 43”) arranged on one long side of the base plate 35 are
It is provided so as to move in the longitudinal direction of the base plate 35 along the longitudinal direction thereof, and is capable of retracting into and out of the space above the base plate 35. On the other hand, the bar-shaped members 42 of the group 44 (hereinafter, referred to as “horizontal bar group 44”) arranged on one short side of the base plate 35 are moved along the longitudinal direction thereof in the lateral direction of the base plate 35. Is provided in the vertical bar group 43, and can be retracted in the space above the base plate 35 similarly to the bar-shaped members 41 of the vertical bar group 43. In the positioning / guide jig 40, the rod-shaped members 41 and 42 of the vertical bar group 43 and the horizontal bar group 44 are set at the initial position (the bar-shaped member 4).
When the members 1 and 42 are pushed out from the position (the position shown in FIG. 6A) located outside the space above the base plate 35 into the space above the base plate 35, the rod-shaped members 41, 42 are vertically and horizontally assembled in the space, and a space 45 surrounded by the adjacent rod-shaped members 41 and 42 (hereinafter, simply referred to as “cell 45”) corresponds to each recess 31 of the base plate 35, in other words, in other words. Each recess 3 of the base plate 35
1 are assembled in a grid pattern so that a plurality of cells 45 are formed in the same phase above 1 (FIG. 6).
(See (b)). When the rod-shaped members 41 and 42 in this assembled state are returned to their initial positions, the assembled state is released and disassembled.

[Temporary attaching process (planting work of closed pipe)] (Fig. 7)
(See (a) and (b)) Vertical bar group 43 in the positioning / guide jig 40
And the rod-shaped members 41, 42 of the horizontal rod group 44 are pushed out to form a lattice in the space above the receiving side base plate 35.
Next, the closed tube inserter 25 conveyed from the pre-assembly step (1) is erected, and the erected closed tube inserter 25 is positioned above the lattice set.
At the time of this positioning, the plurality of rows of the closing tubes 15 filled in the closing tube inserter 25 are made to correspond to the cells 45 in the lateral direction formed by the lattice set. Then, the fasteners 28 of the closed tube inserter 25 are released and the closed tubes 15 are collectively pushed out to insert the closed tubes 15 into the cells 45 arranged side by side. At this time, the rod-shaped members 41 and 42 forming the cell 45
The closed pipe 15 is guided to the recess 31 while being continuously positioned. In this way, the closing pipe 15 is planted in each of the concave portions 31 of the receiving side base plate 35 arranged in the lateral direction. By repeating this operation, as shown in FIG. 7B, the closing pipe 15 is planted in all the recesses 31 of the receiving side base plate 35.
In the present embodiment, by using the positioning / guide jig 40 and the closed tube inserter 25 in this way, the closed tube 15 can be quickly and surely planted in the receiving side base plate 35.

[Temporary Attaching Step (Mounting Operation of Covering Side Base Plate)] (See FIG. 8A) The surface of the base plate 35 in which the solder 33 is filled in the recess 31 in the wax filling step is directed downward. Later, this base plate 3
5 is attached so as to cover all the closed pipes 15 planted in the planting work of the closed pipes, and the cover side base plate 3
Set to 5. At this time, positioning is performed so as to correspond to each of the closed pipes 15 that are planted, and each recess 31 of the cover-side base plate 35
Each closed tube 15 is inserted in the. Thus, the receiving side base plate 35, the closing tube 15, and the covering side base plate 3
Three of 5 are temporarily attached.

[Joining Step] The receiving side base plate 3 in a state in which the receiving side base plate 35, the closing tube 15 and the covering side base plate 35 are temporarily attached in the temporary attaching step.
The wax 33 filled in 5 is melted by applying heat, and the receiving side base plate 35 and the closing pipe 15 are joined. After that, the one in which the receiving side base plate 35 and the closing pipe 15 are joined is inverted, and the covering side base plate 35 and the closing pipe 15 are joined in the same manner as the receiving side base plate 35.
In this way, the receiving side base plate 35, the closing tube 15, and the covering side base plate 35 are joined together by brazing. In this embodiment, since both ends of the closed pipe 15 are the closed portions 15b, the wax 33 melted in this joining step does not enter the inside of the closed pipe 15. Therefore, the closed tube 15 and the receiving-side and covering-side base plates 35, 35 can be reliably joined with the appropriate amount of the brazing material 33 filled in the recess 31.

After the joining step, as shown in FIG. 8B, the rod-shaped members 41 and 42 of the vertical bar group 43 and the horizontal bar group 44 of the positioning / guide jig 40 are pulled back to disassemble the lattice set. . Then, the receiving side base plate 3
5, the closed pipe 15, and the cover-side base plate 35 are removed from the working table in a state in which they are joined by brazing. Then, the brazed three members are conveyed to the next closed portion removing step. In this embodiment, by pulling back the rod-shaped members 41 and 42 of the vertical bar group 43 and the horizontal bar group 44 even after the completion of the joining process, the lattice set can be easily disassembled without interfering with the closed pipe 15. Therefore, it is possible to easily remove what is brazed by the three members.

[Closing Part Removal Step] (See FIGS. 9A and 9B) In the joining step, the receiving side base plate 35, the closing tube 15 and the covering side base plate 35 are joined by brazing. In the state, as shown in FIG. 9A, the pipe portion 15a of the closed pipe 15 is present on the transverse section 36 of the base position of the convex portion 32 on the receiving side and covering side base plates 35, 35. The closed pipe 15 and the base plates 35, 3 in the
And 5 are joined. In this step, the convex portion 32 including the closing portion 15b is removed to the position of the cross section 36. Examples of means for removing the convex portion 32 include a method of cutting using an electric discharge machine or a wire cut electric discharge machine. In this way, the receiving side base plate 35, the closing tube 15, and the covering side base plate 35 are respectively arranged as shown in FIG.
As shown in (b), the lower plate 12, the flow pipe 4 and the upper plate 11 are used to obtain the core portion 10 as shown in FIG.

[Finishing Step] This step is an optional step. In the core portion 10 obtained in the closing portion removing step, buffing is performed on the portion where the convex portion 32 is removed (the portion indicated by the symbol E in FIG. 9B) to remove burrs and burrs. Completely remove and finish flat. As a result, defects such as passage closure can be reliably prevented, and the cooling fluid can flow more smoothly, so that the quality and performance of the product can be further improved.

Then, as described above, the upper tank body 7 and the lower tank body 8 are joined to the core portion 10 obtained through the finishing process, and the upper tank body 7 and the lower tank body 8 are connected to each other as shown in FIGS.
The heat exchanger as shown in (c) is completed.

According to this embodiment, the operator installs the distribution pipe 1
Compared with the conventional method of manufacturing a heat exchanger in which the upper tank and the lower tank are joined by hand one by one, the number of assembling steps can be significantly reduced, and the tank and the distribution pipe can be accurately and reliably connected. Therefore, a high quality and low cost heat exchanger can be provided.

Next, FIG. 10 shows a modified example of this embodiment.
Will be described with reference to. FIG. 10A is a diagram showing the operation of implanting the closed pipe, FIG. 10B is a state diagram showing that the operation of implanting the closed pipe is completed, and FIG. , And the state diagram (d) in which the lattice set is disassembled after the joining process, respectively. The same components as those in the previous embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In this modification, when the core portion 10 is manufactured, the receiving side base plate 35 is processed by a processing table (not shown).
Standing up to and corresponding to this, positioning / guide jig 4
0 is installed, the closing pipe 15 is inserted into the positioning / guide jig 40 so as to move from the closing pipe inserter 25 in the water direction, and the closing pipe 1 is inserted into the receiving side base plate 35.
5 is planted, but the gist thereof is the same as that of the previous embodiment. Therefore, according to this modification, it is possible to obtain the same effects as those of the previous embodiment.

Further, another embodiment of the present invention will be described. FIG. 11 is a view for explaining another embodiment of the present invention, which is a cross-sectional view (a) of a main part immediately after the joining step,
An enlarged view (partial cross-sectional view) of the R portion in (a) and a view (c) showing a state in which the bent portion is removed are shown. The same or similar parts as those in the previous embodiment are designated by the same reference numerals.

In the present embodiment, instead of the closed pipe 15 in the previous embodiment, as shown in FIG. 11A, straight pipe portions 55a and bent pipe portions 55b are alternately and bent pipes. A bent tube 55 is used in which the portion 55b is formed to be continuous while changing the bending direction, and the bent tube portion 55b of the bent tube 55 is inserted into the recess 31 'of the base plate 35' on the receiving side and the covering side. In the state
The three are joined by brazing. Also in this embodiment, the positioning / guide jig 40 'is used when the bent tube 55 is planted in the receiving side base plate 35'. At the time of this implantation operation, the cell 45 'in the positioning / guide jig 40' is inserted from the bent tube portion 55b of the bent tube 55. Further, in the present embodiment, after the joining step, the convex portion 32 ′ is removed to the position of the cross section 56 at the base position thereof (the removing means is the same as in the previous embodiment), so that the bent pipe portion of the bent pipe 55 is formed. 55b is removed, and the straight pipe portion 55a is used as the flow pipe 4 '(see FIGS. 11B and 11C). Even in such an embodiment, the same operational effects as those of the previous embodiment can be obtained.

Incidentally, instead of the positioning / guide jigs 40 and 40 'in each of the above-mentioned embodiments and modifications, FIG.
A positioning / guide jig 50 as shown in (a) may be used. Positioning / guide jig 50 according to another aspect
Corresponds to the vertical bar group 43 in the positioning / guide jig 40, and is a vertical comb group 53 in which comb-shaped members 51 having required comb teeth 51a are provided in multiple stages, and corresponds to the horizontal bar group 44. What you need is comb teeth 5
A comb-shaped member 52 having 2a is formed into a multi-stage lateral comb group 54, and a reciprocating operation of the comb-shaped members 51 and 52 assembles a grid set having the same function as the grid set in the positioning / guide jig 40. It is configured to be disassembled or disassembled. Here, in the comb-shaped member 52, as shown in FIG. 12B, each edge 52b of the adjacent comb teeth 52a is closed by the closed tube 1.
It is preferable to slightly bend it in the insertion direction side of 5 or to bend it in an R shape (the same applies to the comb-shaped member 51). By doing so, the closed tube 15 can be inserted more smoothly without being caught.

[Brief description of drawings]

FIG. 1 is a diagram showing a heat exchanger according to an embodiment of the present invention, which is an external view (a), a partially cutaway view (b) of (a), and a functional explanatory view (c). .

FIG. 2 is a state diagram in which a heat exchanger is disassembled into coupling units in a manufacturing stage.

FIG. 3 is an explanatory view of a pre-assembly process, showing an external view of a raw tube (a), an external view of a closed tube (a ′), a perspective view of a plate material (b), a perspective view of a base plate (b ′), and b ') AA sectional drawing (c)
Is.

FIG. 4 is an explanatory view of a filling operation of the closed tube into the closed tube inserter.

FIG. 5 is an explanatory diagram of a wax filling step.

6A and 6B are explanatory views of a temporary attaching process, showing a placing work of a receiving side base plate and an installing work of a positioning / guide jig, and a state diagram in which a lattice set is assembled (b). ).

FIG. 7 is an explanatory diagram of a temporary attaching step, and is a diagram (a) showing a planting operation of a closed pipe and a state diagram (b) in which the planting operation of the closed pipe is completed.

FIG. 8 is an explanatory view (a) of the work of attaching the cover-side base plate in the temporary attaching step, and a state diagram (b) in which the lattice set is disassembled after the joining step.

9 is a sectional view (a) of a main part taken along line BB in FIG. 8 (b) and a state diagram (b) after a closing part removing step.

FIG. 10 is an explanatory view of a modified example, a diagram (a) showing a planting operation of a closed pipe, a state diagram (b) in which a planting operation of a closed pipe is completed, and a cover-side base in a temporary attaching process. It is explanatory drawing (c) of the mounting work of a board, and the state figure (d) which the lattice group was decomposed | disassembled after a joining process.

FIG. 11 is a view for explaining another embodiment of the present invention, which is a cross-sectional view (a) of the main part immediately after the joining step.
It is an enlarged view (partial sectional view) of the R part in (a), and a view (c) showing a state in which the bent portion is removed.

FIG. 12 is an enlarged perspective view (B) of the P portion in FIG. 12A and FIG. 12A showing another aspect of the positioning / guide jig.

[Explanation of symbols]

1 heat exchanger 2 upper tank 3 lower tank 4 distribution pipes 7 Upper tank body 8 Lower tank body 10 core part 11 Upper plate 12 Lower plate 15 Closed tube 15a pipe section 15b Closure 31 recess (base plate) 32 Convex part (base plate) 34 Deaf 35 base plate 36 Cross section (convex part) 40 Positioning / guide jig 41 Bar-shaped member (vertical bar) 42 Bar-shaped member (horizontal bar) 43 Vertical Bar Group 44 Horizontal bar group 45 cells

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Claims (4)

[Claims] 1. A method for manufacturing a heat exchanger comprising a tank for storing a heat-transporting fluid, the method comprising: closing a required end of a tubular member to form a closed portion to obtain a closed pipe; A step of forming a concave portion for receiving an end portion including a closed portion of the closed pipe in the member to obtain a base plate; and a step of filling the concave portion with a wax, and A closed pipe implanting step of implanting the closed pipe in the recess using a positioning / guide jig for positioning / guided; (b)
After the step of implanting the closed pipe, a joining step of joining the closed tube and the base plate by melting the wax filled in the recess with the recessed surface of the recess at the bottom, (c) of the joining step After that, at least the closed portion is removed, and a closed portion removing step in which the closed pipe is used as a flow pipe, (d) after the closed portion removal step, the tank and the flow pipe are connected so as to communicate with each other. A method of manufacturing a heat exchanger, comprising a step of connecting a main body portion and the base plate. 2. A method of manufacturing a heat exchanger comprising a tank for storing a heat-transporting fluid, wherein a straight tubular member is bent, and straight pipe portions and bent pipe portions are alternately arranged, and the bent pipes are formed. The step of obtaining a bent tube in which the parts are continuous while changing the bending direction; the step of forming a recess for receiving the bent tube part in the plate member to obtain the base plate; and the step of filling the recess with wax. At the same time, (a) a bent pipe planting step of implanting the bent pipe in the recess by using a positioning / guide jig for positioning and guiding the bent pipe in the recess, (b) this bent pipe planting After the installation step, a joining step of melting the wax filled in the depression with the recessed surface of the depression at the bottom to join the bent tube and the base plate, (c) at least after the joining step Remove bent tube And (d) after the bent pipe part removing step, in which the straight pipe part is used as a flow pipe, (d)
A method of manufacturing a heat exchanger, comprising a step of connecting a main body portion of the tank and the base plate so that the tank and the flow pipe are communicated with each other. 3. The positioning / guide jig according to claim 1, comprising a plurality of reciprocating rod-shaped members,
When these rod-shaped members are extruded, the rod-shaped members are assembled in a lattice shape, and a space surrounded by the adjacent rod-shaped members is formed so as to correspond to the concave portion of the base plate. A jig used in the manufacturing method of a heat exchanger. 4. A heat exchanger manufactured by the method for manufacturing a heat exchanger according to claim 1.