JPH0894281A - Manufacture of heat exchanger - Google Patents

Abstract

PURPOSE: To temporarily hold an assembly merely by temporarily attaching a tube element to a tank by connecting exit/entrance part formed at both longitudinal ends of the element to the connecting holes of tanks, and sandwiching a plurality of laminated elements between both side tanks. CONSTITUTION: Exit/entrance parts 21, 22 are engaged with connecting holes 38 while interposing corrugated fins to laminate a plurality of stages of tube elements 20, and exit/entrance pipes are connected to a tank 30. In this case, since the elements 20 are sandwiched between the tanks from both ends by engaging the parts 21, 22 with the holes 38 of the tank 30, the assembly is temporarily held. Thus, since the time required when the elements 20 are laminated can be deleted, the manufacturing steps of a heat exchanger can be enhanced in efficiency.

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 used as a heater core in a vehicle air conditioner, for example.

[0002]

2. Description of the Related Art A method for simultaneously producing two or more heat exchangers in one production process is disclosed in, for example, JP-A-62-2.
The specification of Japanese Patent No. 86632 and those shown in FIGS. 1 to 3 are already known.

An outline of the method for manufacturing such a heat exchanger is as follows.
First, the band-shaped plate 12 is formed, and then the band-shaped plate 12 is provided with passage-forming depressions 61, 62, and inflow ports 81, 82 and outflow ports 91, 82 communicating with the depressions 61, 62.
Entry / exit tank depressions 101, 102, 1 having 92
A plurality of members 11 and 112 are formed by pressing along the longitudinal direction of the strip plate 12.

Next, the pair of strip-shaped plates 12 are joined so as to face each other to form a passage unit 120 having therein a fluid passage through which a plurality of refrigerants flow and an inlet / outlet tank. And such passage unit 12
0 is laminated so that the inflow ports 81 and 82 and the outflow ports 91 and 92 communicate with each other, and at the same time, the corrugated fins 10 are interposed between the passage units 120 to temporarily assemble the heat exchanger. To do.

Finally, after the temporarily assembled heat exchanger is brazed in the furnace, the heat exchanger is taken out of the furnace and the fluid passages of the passage unit 120 in which a plurality of units are laminated are cut off. Separation produces two or more heat exchangers.

[0006]

However, in the above heat exchanger manufacturing method, since the passage units are laminated and not fixed, the passage unit and the corrugated fins are temporarily assembled. During brazing, each passage unit must be temporarily held by a jig so that adjacent passage units do not separate.

For this reason, the dimension in the longitudinal direction of each passage unit is more than double that in the case where individual heat exchangers are individually laminated, so that temporary holding by the jig is performed in the longitudinal direction of the heat exchanger. Since it has to be performed at two locations on both ends, preferably at three locations with the center further added, there is the inconvenience that the temporary holding work of the heat exchanger is troublesome.

When performing brazing in a furnace, each passage unit has a brazing material clad on both sides for brazing, and this brazing material is once melted in the furnace and then solidified by cooling. Joined by.

However, in the above-mentioned conventional example, there is a problem that the jig and the passage unit are also joined by the brazing material clad in the passage unit, so that it becomes difficult to separate the heat exchanger after brazing, There has been a problem that it is necessary to use extra parts such as side plates to prevent the jig and the passage unit from being joined.

In view of the above problems, the present invention has been made in view of the above problems.
When two or more heat exchangers are manufactured simultaneously in one manufacturing process, after temporarily assembling tube elements, etc.,
A jig for temporarily holding the assembly such as the tube element is not required until brazing, the assembly is easy to handle, and the assembly can be easily separated without increasing the number of parts. An object of the present invention is to provide a method for manufacturing a simple heat exchanger.

[0011]

SUMMARY OF THE INVENTION In the method of manufacturing a heat exchanger according to the present invention, however, a tank peripheral wall portion and an end plate are combined to form a closed chamber, and a partition plate divides the chamber into two chambers. The tank is divided into two parts, the end plate is formed with a plurality of connection holes communicating with the inside of the chamber, and the elongated plate is provided with a cutting margin at the center in the longitudinal direction, and the plate is symmetrical from this center. By forming a heat exchange medium passage forming bulge portion on the side, and forming an inlet / outlet portion forming bulge portion which is continuous with the heat exchange medium passage forming bulge portion at both ends and can be inserted into the tank. A tube element having two heat exchange medium passages, an inlet / outlet portion communicating with the heat exchange medium passages, and a cutting portion by forming a plate and then joining the pair of molding plates face to face By connecting the inlet / outlet portions formed at both ends of the tube element and the connection hole of the tank, the tube elements are laminated in a plurality of stages with the corrugated fins interposed therebetween, and the tubes are laminated in a plurality of stages. After brazing the element, it comprises a step of cutting and separating at the cutting portion.

[0012]

Therefore, according to the method of manufacturing the heat exchanger according to the present invention, in the manufacturing process of the heat exchanger, the inlet and outlet portions formed at both longitudinal ends of the tube element are connected to the connection holes of the tank, respectively. The tube elements stacked in a plurality of stages are sandwiched between the tanks on both sides. Therefore, even if the tube element is temporarily assembled to the tank, the assembled body is temporarily held, so that a jig is unnecessary,
Moreover, the handling of the assembled body becomes easy.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of a molding plate 2 used in the method for manufacturing a heat exchanger according to the present invention.

The molding plate 2 is, for example, an elongated rectangular shape made of an aluminum alloy or the like whose main material is aluminum in which a brazing material is clad on both sides, and as shown in FIG. The inlet / outlet portion forming bulges 6 and 7 serving as outlets and outlets of the exchange medium are bulged and formed by, for example, press working.

A ridge 8 extends from between the bulge portions 6 and 7 for forming the inlet / outlet toward the central portion 5 side, and the bulge portions 6 and 6 for forming the inlet / outlet are formed on the periphery of the ridge 8. U leading to 7
The letter-shaped heat exchange medium passage forming bulging portion 10 is also bulged and formed by pressing.

Further, the central portion 5 of the molding plate 2 has flanges 13 and 13 extending outward, and the flange 1.
A cutting allowance 14 is formed between 3 and 13.
The flange 13 is a tube element 20 described below.
When the tube element is formed, the space between the tube elements 20 and 20 is closed. Further, the cutting margin 14 may not be formed in the entire area of the molding plate 2 in the lateral direction, and for example, a rectangular window portion 15 may be formed in the center thereof to facilitate cutting.

As shown in FIG. 2, a tube element 20 is formed by joining the two molding plates 2 with their peripheral edges aligned in the middle, and at both ends thereof, the bulging portions for forming inlet / outlet portions facing each other. A pair of heat exchange medium inlet / outlet portions 21 and 22 are configured from 6, 7, and inside thereof, a substantially U-shaped heat exchange medium passage 24 extends from the heat exchange medium passage forming bulging portion 10 to the central portion 5. It is constructed symmetrically to the boundary.
The inlet / outlet portions 21 and 22 communicate with each other via the heat exchange medium passage 24.

The central portion 2 of the tube element 20
In FIG. 5, the flange 13 and the cutting allowance 14 form two cutting portions 26 having a rectangular frame shape.

As shown in FIGS. 3 and 4, the tank 30 is composed of a tank peripheral wall portion 31 having a substantially bow-shaped cross section and an end plate 32 having a flat surface shape, which is separate from the tube element 20. The tank peripheral wall portion 31 and the end plate 32 are made of an aluminum alloy whose main material is aluminum clad with a brazing material.

The partition plate 33 is provided in the center of the tank 30 in the extending direction by means of the partition plate 33 to distribute the heat exchange medium.
4 and the water collecting passage 35, and an inlet pipe 36 is connected to the distribution passage 34 and an outlet pipe 37 is connected to the water collecting passage 35. The openings at both ends of the tank 30 in the extending direction are closed by the closing portions 39.

The end plate 32 is provided with a plurality of pairs of connection holes 38 in which the inlet / outlet portions 21 and 22 of the tube element 20 are inserted and arranged in parallel. And
The heat exchange medium passage 24 of the tube element 20 and the distribution passage 34 and the water collection passage 35 of the tank 30 communicate with each other by inserting and fitting the inlet / outlet portions 21 and 22 into the respective connection holes 38.

Next, a method of manufacturing a heat exchanger using the tube element 20 and the tank 30 having the above construction will be described.

First, as shown in FIG. 3, the inlet / outlet portions 21 and 22 formed at both ends of the tube element 20 and the respective tanks 30 and 30 are connected to the connecting holes 38 with the corrugated fins 3 interposed therebetween. The tube element 20 is laminated in a plurality of stages by repeating the step of inserting and fitting the 21, 22 and the inlet and outlet pipes 36, 37 are connected to the tank 30.
Thereby, as shown in FIG. 4, the assembly 1 of the plurality of tube elements 20 and the two tanks 30 is completed.

In this case, each tube element 20
Since the inlet / outlet portions 21 and 22 are inserted into the connection hole 38 of the tank 30 and sandwiched by the tank from both ends, the assembled body 1 is already temporarily held in the state where the temporary assembly is performed. It will be in the state of being made. Therefore, when the assembly 1 is moved for brazing in the furnace described below, the end plate 32 of the tank 30 or the like can replace the jig.

Next, the assembly 1 is installed in a heating furnace (not shown) and the tube element 20 and the tank 3 are installed.
By melting the brazing material clad to 0, after brazing in the furnace, it is cooled to complete the joining and fixing of the assembly 1.

Finally, the cutting portion 26 is cut at the cutting margin 14 from the direction of the arrow A with saw teeth such as a band saw,
Two heat exchangers can be manufactured by cutting with a slide type breaker or water jet.

As a result, the time required for stacking the tube elements 20 can be greatly reduced as compared with the case where two heat exchangers are manufactured, so that the efficiency of the heat exchanger manufacturing process can be improved. it can.

FIG. 5 shows an embodiment of a molding plate 40 different from the above-mentioned molding plate 2 used in the method for manufacturing a heat exchanger of the present invention. The molding plate 40 will be described below.

However, the molding plate 40 has the same structure as that of the molding plate 2, that is, the bulging portion 6 for forming the entrance / exit.
7, the heat exchange medium passage forming bulging portion 10 and the ridge 8 are denoted by the same reference numerals, and the description thereof will be omitted. Only different portions will be described. Further, the steps of the manufacturing method of the heat exchanger are the same as the steps described above, and therefore the description thereof will be omitted.

In the center portion 5 of the molding plate 40, flanges 13 and 13 extending outward and a cutting margin 41 extending between the flanges 13 and 13 are formed.

The cutting margin 41 is, as shown in FIG.
It has substantially V-shaped notches 42, 42 at both ends,
The angle a of the notch 42 is preferably in the range of 10 degrees to 45 degrees. A substantially rhombic window portion 43 is formed at the center of the cutting margin 41 in the ventilation direction.

The dimension b between the window portion 43 and the cutout 42 is preferably 0.5 mm to 1 mm. The thickness of the cutting margin 41 is preferably about 1 mm so that it will be about 2 mm when the cutting portion 48 described below is configured.

However, by joining the two edges of the molding plate 40 so that their peripheral edges are aligned, the heat exchange medium passage 24, the inlet / outlet portions 21, 22 and the cutting portion 46 of the rectangular frame body in the central portion 25 are joined. A tube element 50 having the same is constructed and assembled into the tanks 30, 30 to be integrated as an assembly 1 shown in FIG. 7, and this tube element 50 is cut by a band saw or water jet or the like like the tube element 20. Besides having the cutout 42 and the window portion 43, it is possible to perform cutting by applying a bending force to the central portion 25 or pulling.

Further, in FIG. 8, the above-mentioned tube element 20 used in the method for manufacturing the heat exchanger of the present invention,
A third embodiment of a tube element 55 different from 50 and a fin 3'different from the previously described fin 3 is shown, which tube element 55 and fin 3'will be described below.

However, in the tube element 55, the same structure as that of the tube element, that is, the heat exchange medium passage 24 and the ridge 8 are denoted by the same reference numerals, and the description thereof will be omitted. Only different portions will be described.

No flange is formed between the heat exchange medium passages 24 of the tube element 55,
Only the plate-shaped cutting margin 56 having a smaller thickness than the heat exchange medium passage 24 is provided. Therefore, the side surface of the tube element 55 in the stacking direction is substantially flat. Although not shown in the drawing, the fin 3 ′ has substantially the same dimension as the longitudinal dimension of the tube element 55.

Therefore, in the previous two embodiments,
When the tube elements 20 and 20 or the tube elements 40 and 40 are laminated with the fin 2 interposed,
Since the surface on the stacking side is divided into two by the flange 13, it is necessary to interpose two fins 3 at a time, whereas one fin 3 ′ may be intervened.
Assembly work of the heat exchanger can be further simplified.

[0039]

As described above, according to the method of manufacturing a heat exchanger of the present invention, in the manufacturing process of the heat exchanger, the inlet and outlet portions formed at both longitudinal ends of the tube element are connected to the tank. The tube elements connected to the holes and stacked in multiple stages are sandwiched by the tanks on both sides. Therefore, even if the tube element is temporarily assembled to the tank, the assembly is temporarily held, so that no jig is required and the assembly can be handled easily.
The assembly can be easily separated without increasing the number of parts.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a molding plate of a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a tube element configured by aligning two molding plates in the middle.

FIG. 3 is an explanatory view showing a step of inserting and fitting the tube element into a joint portion of a tank.

FIG. 4 is an explanatory view showing an assembly formed by temporarily assembling the tube element and the tank.

FIG. 5 is an explanatory view showing a configuration of a forming plate of the heat exchanger according to the second embodiment of the present invention.

FIG. 6 is an enlarged view of an essential part showing a cutting margin of the molding plate.

FIG. 7 is an explanatory view showing an assembly body obtained by temporarily assembling a tube element and a tank, which are formed by aligning two molding plates in the middle.

FIG. 8 is an enlarged view of an essential part showing a cutting margin and a fin configuration of a heat exchanger according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Assembly body 2 Forming plate 3 Fin 3'Fin 5 Center part 6,7 Expansion part for forming inlet / outlet part 10 Expansion part for forming heat exchange medium passage 14 Cutting allowance 20 Tube element 21,22 Entrance / exit part 24 Heat exchange medium Passage 25 Central part 26 Cutting part 30 Tank 31 Tank peripheral wall part 32 End plate 33 Partition plate 38 Connection hole 39 Closing part 40 Forming plate 41 Cutting allowance 48 Cutting part 50 Tube element 55 Tube element 56 Cutting allowance

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 23, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

For this reason, the dimension in the longitudinal direction of each passage unit is more than double that in the case where individual heat exchangers are individually laminated, so that temporary holding by the jig is performed in the longitudinal direction of the heat exchanger. two places of both end portions, so preferably it is necessary to perform a further three positions plus a central, temporary holding work of the heat exchanger had a disadvantage that it is cumbersome.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

[0012]

Therefore, according to the method of manufacturing the heat exchanger of the present invention, in the manufacturing process of the heat exchanger, the inlet / outlet portions formed at both ends in the longitudinal direction of the tube element are connected to the connection holes of the tank, respectively. The stacked tube elements are sandwiched between the tanks on both sides. Therefore, only by temporarily assembling the tube element in the tank, the assembly is temporarily held, so that no jig is required and the assembly can be handled easily.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

Next, the assembly 1 is installed in a heating furnace (not shown) and the tube element 20 and the tank 3 are installed.
0 to be to be melted Taro material cladding, after brazing in a furnace to complete the bonding fixation of the assembled unit 1 is cooled.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction content]

[0039]

As described above, according to the method of manufacturing the heat exchanger of the present invention, in the manufacturing process of the heat exchanger, the inlet / outlet portions formed at both ends in the longitudinal direction of the tube element are the connection holes of the tank. The tube elements connected to each other and stacked in a plurality of stages are sandwiched between the tanks on both sides. For this reason,
Simply by temporarily assembling the tube element to the tank, the assembly is temporarily held, so no jig is required, the assembly is easy to handle, and the number of parts is not increased. The assembly can be easily separated.

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoji Kuwahara 39 No. 39 Toyohara, Chiyo-ji, Konan-cho, Oza-gun, Saitama Prefecture Zexel Konan Factory Co., Ltd.

Claims (1)

[Claims] 1. A tank peripheral wall portion and an end plate are combined to form a closed chamber, and the chamber is divided into two by a partition plate, and a plurality of connection holes communicating with the chamber are formed in the end plate. A tank is formed, and a long and thin plate is provided with a cutting margin at the central portion in the longitudinal direction, a bulging portion for forming a heat exchange medium passage is formed symmetrically from the central portion on the plate, and the heat exchange medium is provided at both end portions. After forming a molding plate by forming a bulging portion for forming an inlet / outlet portion that is continuous with the bulging portion for forming a passage and can be inserted into the tank, the pair of molding plates are joined face to face,
A tube element having two heat exchange medium passages, an inlet / outlet portion communicating with the heat exchange medium passage, and a cutting portion is formed, and an inlet / outlet portion formed at both ends of the tube element and a connection hole of the tank are formed. And a plurality of tube elements are laminated while interposing corrugated fins, and the tube elements that are laminated in a plurality of steps are brazed and then cut and separated at the cutting portion. Method of manufacturing exchanger.