JPH11148793A - Method and device for forming fin used in integral heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and rapidly form cut-out parts, prevent the forming speed of fins from being low and maintain a good production efficiency when corru gated fins having the cut-out parts formed for reducing heat transfer are formed. SOLUTION: A method for forming fins comprises a corrugation working step for bending a fin material 25 in a corrugated form, a pitch adjusting step for adjusting the pitch of the corrugated fin material 25 and a cutting step for cutting the fin material 25 whose pitch is adjusted to a prescribed length. Before the corrugation working step, a cut-out part working step is provided for boring cut-out parts 24 in the fin material 25 by rotating rotors 33 ad 35 with boring mechanisms formed on their peripheries. Since the cut-out parts 24 are formed by rotating the rotors 33 and 35, the cut-out parts 24 can be bored successively at prescribed intervals without preventing the movement of the fin material 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fin for an integrated heat exchanger, in which a plurality of heat exchangers are integrally connected one after the other in the ventilation direction, and fins are integrally formed by adjacent heat exchangers. The present invention relates to a method and a molding apparatus.

[0002]

2. Description of the Related Art A heat exchanger disclosed in Japanese Utility Model Publication No. 6-45155 has a structure in which first and second heat exchangers disposed in parallel with common corrugated fins are integrated. Have been. In this publication, a notch (slit) is formed in a flat portion of a fin located between the first heat exchanger and the second heat exchanger in this heat exchanger. A configuration is shown in which heat is prevented from conducting from the vessel side to the other heat exchanger via the fins.

The integrated heat exchanger disclosed in Japanese Patent Application Laid-Open No. 3-177953 combines a first heat exchanger and a second heat exchanger having different working temperatures by integrally connecting corrugated fins. A notch is formed at an intermediate portion in the width direction of the fin to cut off heat conduction between the two heat exchangers.

[0004]

By the way, a corrugated fin is formed by forming a fin material having a predetermined width conventionally formed continuously into a corrugated shape with roll gears meshing with each other, and then adjusting the fin pitch. It is formed by cutting to a predetermined length.

However, in a fin mounted over a plurality of heat exchangers, a notch for reducing heat transmission is formed. Therefore, in addition to the conventional molding method, a step of forming a notch hole is required. I need.

Since it is difficult to form the notch after the fin material is processed into a corrugated shape (hereinafter referred to as corrugating), it is desirable to form the notched hole before the corrugating process. When the notch formed in the material is formed by press working in which the upper mold and the lower mold are overlapped and pressed, the speed of the press working is considerably lower than the speed of the corrugating. For this reason, when the press working and the corrugating are provided on the same forming line, the fins can be formed only at the speed of the press working, and the production efficiency is disadvantageously deteriorated.

However, if the pressing step and the corrugating step are formed as separate lines, the number of man-hours required to complete the fins increases, and the reduction in production efficiency can be prevented when the lines are separated. It is not possible.

Therefore, according to the present invention, the notch can be easily and quickly formed in the fin material. Even if this notch forming step is incorporated into a corrugating line, the fin forming speed is reduced. Can be prevented,
A main object of the present invention is to provide a method and an apparatus for forming fins used in an integrated heat exchanger that can maintain good production efficiency.

Further, the forming position, shape, number and the like of the cutouts provided in the fins can be freely changed as designed, and even if the cutout forming step is provided before the corrugating step, It is an object of the present invention to prevent corrugating from affecting the formation of the notch.

[0010]

In order to achieve the above object, a method of forming a fin used in an integrated heat exchanger according to the present invention is provided over a plurality of heat exchangers which are integrally connected. According to a method of forming a fin in which a notch for reducing heat transfer between adjacent heat exchangers is formed, a continuous fin material formed in a width that can be laid over the plurality of heat exchangers is continuously formed. Corrugating step sequentially bent in a corrugated shape with the movement of the direction, and a cutting step of cutting the fin material formed in the corrugated shape to a predetermined length, at a stage prior to the corrugating process, A notch processing step of forming the notch in the fin material by rotation of a rotating body having a perforating mechanism formed around the notch is provided (claim 1).

Therefore, a notch is formed in the fin material by the notch processing step, and the fin material having the notch formed by the subsequent corrugation processing step is sequentially bent to form a corrugated shape. Since the notch formed in the fin material is formed by rotation of a rotating body having a perforation mechanism formed around the notch portion, the notch portion can be sequentially drilled at predetermined intervals without obstructing the movement of the fin material. The notch can be easily and quickly formed, and the processing speed in the notch processing step can be adjusted to the processing speed in the corrugating processing step.

The corrugated fin material thus formed is then cut to a predetermined length in a cutting step.
Here, as the cutting step, a method of counting the number of peaks of the fin material and cutting the fin material at a predetermined number of peaks can be considered.

A pitch adjusting step may be provided between the corrugating step and the cutting step to adjust the pitch of the fin material formed in a corrugated shape to a predetermined pitch. As the pitch adjusting step, a step of temporarily reducing the pitch of the fin material formed in a corrugated shape and then expanding the pitch to a predetermined pitch can be considered.

The notch is formed by a rotating body having a perforating mechanism formed around the first rotating body having a male mold formed around the female body and the first rotating body having the male mold formed around the cutout. The notch may be perforated by passing a fin material between the second rotator and the fin material (claim 3). In (4), the fin material may be perforated at intervals to bend.

When the notch is formed in accordance with the interval at which the fin material is bent, the notch may be located at the bent portion of the fin material, or the bent portion may be shifted from the notch and the flat portion of the fin material may be formed. It is also possible to position the notch at the position.

Here, a plurality of notches for reducing heat transfer between adjacent heat exchangers are formed even if at least one notch is formed between adjacent heat exchangers. The plurality of heat exchangers to be integrated may be heat exchangers having different applications or may be the same heat exchangers, or may be two heat exchangers. The heat exchanger may be integrally provided or three or more heat exchangers may be integrally provided.

In the notch processing step, holes are formed at predetermined intervals due to the rotation of the rotating body, so the fin material continues to move without stopping or bending. However, in the corrugating processing step, the fin material is bent. Since the fin material is formed into a corrugated shape, the movement amount of the fin material slightly changes at a transition portion to the corrugating process. For this reason, it is preferable to absorb such a variation by slackening the fin material between the notch processing step and the corrugation processing step (claim 5).

As an apparatus used in the above-mentioned fin forming method, a continuous fin material having a width that can be laid over a plurality of heat exchangers integrally connected is supplied, and a piercing mechanism is formed around the fin material. A notch processing machine that forms a notch in the fin material by the rotation of the rotating body, a corrugating machine that forms the fin material that has passed through the notch processing machine in a corrugated shape, and a corrugated processing machine that is formed in the corrugated shape. And a cutting machine for cutting a corrugated fin material formed at the predetermined pitch into a predetermined length. 6) It is desirable that the fin material be slackened between the notch processing machine and the corrugating processing machine.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the integrated heat exchanger 1 is obtained by integrating a condenser 5 and a radiator 9 and is entirely made of an aluminum alloy.

The condenser 5 includes a pair of tanks 2a and 2b.
And a plurality of flat tubes 3 communicating with the pair of tanks 2a and 2b. The radiator 9 includes a pair of tanks 6a and 6a formed separately from the tanks 2a and 2b of the condenser 5. 6b and a plurality of flat tubes 7 formed separately from the tubes 3 of the condenser 5 and communicating with the pair of tanks 6a and 6b, between the condenser 5 and the radiator 9 tubes. An integrated fin 4 laid from one tube to the other tube is joined.

That is, the condenser 5 and the radiator 9
Each tube 3, 7 and one common fin 4
Constitute a heat exchanging unit for exchanging heat between the fluid flowing through the tube and the air passing between the fins, and the respective heat exchanging units are coupled in a state of facing each other.

As the tube 3 of the condenser 5, a tube 3 having a known shape in which the inside is partitioned by a large number of ribs to increase the strength is used. Also, the tank 2 of the condenser 5
a and 2b are configured by closing both ends of a cylindrical tubular member 10 with lids 11, and a plurality of tube insertion holes 12 for inserting the tubes 3 are formed in a peripheral wall of the cylindrical member 10; The inside is partitioned by partition walls 15a, 15b, and 15c to define a plurality of flow chambers. An inlet 13 through which the refrigerant flows is provided at a portion of the tank constituting the most upstream flow path chamber, and an outlet 14 at which the refrigerant flows out is provided at a portion of the tank constituting the most downstream flow chamber. Is provided.

In the configuration example shown in FIG. 1, one tank 2a is defined by three partition walls 15a and 15b in three flow path chambers, and the other tank 2b is defined by one partition wall 15c. One of the tanks 2a is provided with an inlet portion 13 and an outlet portion 14, and the refrigerant entering from the inlet portion 13 is reciprocated twice between the tanks and flows out from the outlet portion 14. It has become.

On the other hand, the tube 7 of the radiator 9
A known shape whose inside is not partitioned by a rib is used. The tank 6a of the radiator 9
6b is provided between a first tank member 16 having a U-shaped cross section in which a tube insertion hole for inserting the tube 7 is formed, and a side wall portion of the first tank member 16, and together with the first tank member 16 A cylindrical body having a rectangular cross section is constituted by the second tank member 17 constituting the peripheral wall of the tank 6, and both ends of the cylindrical body are closed by closing plates 18.

One of the tanks 6b of the radiator 9 is provided with an inlet 19 through which a fluid flows in, and the other tank 6a is provided with an outlet 20 through which a fluid flows out. The interior of the two tanks 6a and 6b is not partitioned, and the fluid that has entered through the inlet 19 is supplied to one of the tanks 6b and 6b.
Is moved to the other tank 6a through the entire tube 7, and then flows out from the outlet 20.

The condenser 5 and the radiator 9 are
A common side plate 21 is attached to the outer side of the laminated tubes 3 and 7 (upper and lower ends of the heat exchanging portion in FIG. 1A) via fins 4 and is integrally connected with the side plates 21. .

The tubes 3 and 7 of the condenser 5 and the radiator 9 are stacked at the same interval in accordance with the height of the fin 4, as shown in FIG.
The tubes 3 and 7 of both heat exchangers are arranged so as to face each other at a predetermined distance in the ventilation direction (horizontal direction in the drawing).

The fin 4 has a bent portion 4a bent so as to be folded and a flat portion 4b formed between the bent portions, and a louver 23 is formed in the flat portion 4b. Also,
Each bent portion 4a of the fin 4 has a cutout portion 24 for reducing heat transfer from the radiator side to the condenser side. The notch 24 is provided at each bent portion 4a of the fin 4.
And a portion deviating from a portion of the condenser 5 where the tube 3 abuts and a portion of the radiator 9 where the tube 7 abuts, that is, a substantially central portion located between the capacitor 5 and the radiator 9. Have been.

The fin 4 having the above structure is formed by a forming apparatus shown in FIG. 3. A method of forming the fin 4 using the apparatus will be described below.

The fin 4 forming apparatus includes an oil applicator 26 for applying oil to a fin material 25 for forming the fin 4, a notch processing machine 27 for forming a notch 24 in the fin material 25, and a fin material 25. Is formed into a corrugated shape while forming a louver 23, a pitch adjuster 29 for adjusting the fin pitch, and a cutting machine 30 for cutting the fin material 25 to a predetermined length. The wound fin material 25 is pulled out at a predetermined speed and guided to an oil applicator 26.

In the oil applicator 26, an oil applying step of applying lubricating oil to the entire surface by passing the fin material 25 through the oil is performed.

Next, the fin material 25 to which oil is applied
Is guided to the notch processing machine 27, and the notch processing machine 27
Then, a notch processing step of forming the notches 24 at predetermined intervals in the moving direction of the fin material 25 is performed.

As shown in FIG. 4, the notch processing machine 27 includes a first rotating body 33 in which a plurality of male dies 32 each having a cutting edge are formed at equal intervals around the periphery thereof. Rotating body 3
And a plurality of female dies 34 for receiving the three male dies 32 at the same interval.
3 and 35 are arranged vertically so as to rotate in synchronization with the respective rotating shafts 33a and 35a, and the fin material 25 is passed between the first and second rotating bodies 33 and 35, The fin material 2 is formed by engagement of the male mold 32 and the female mold 34.
The center of 5 is cut out to form a notch 24 continuously.

The second rotating body 35 has a space 36 formed therein following the female mold 34, and an opening 37 that opens the space 36 to the outside on the side wall. Chips 38 generated from 25 are discharged outside through the space 36 and the opening 37.

The male mold 32 and the female mold 34 are rotated so that the notches 24 are formed at intervals equal to the intervals at which the fin material 25 is bent in the corrugating step described later.
5 and, in this example, are formed so as to be aligned in a circumferential direction of the corresponding rotating bodies 33 and 35.

The fin material 25 in which the notch 24 is formed by the notch machine 27 is guided to a corrugating machine 28. As shown in FIG. 4, the corrugating machine 28 includes a pair of roll gears 40, 40, and forms a plurality of fin forming teeth 41 around the roll gears 40, 40, and each fin forming tooth 41. A plurality of fine teeth (not shown) that cut the louver 23 on the side of 41
Are formed, and the respective roll gears 40 are connected to the fin forming teeth 41.
Are rotated while being meshed with each other, and the fin material 25 is passed therebetween to form a corrugated shape having the bent portion 4a and the flat portion 4b, and at the same time, the louver 23 is formed in the flat portion 4b.

In the stage up to the corrugating process for forming the fin material 25 in a corrugated shape, the fin material 2
5 is provided with a louver 23, and the notch 24 is formed at an interval equal to the interval at which the fin material 25 is bent, so that the notch 2 having a predetermined phase with the bent 4a.
4 are formed (in this example, the position of the notch 24 and the position of the bent portion 4a are matched).

Further, the fin material 25 has a slack between the notch processing machine 27 and the corrugating processing machine 28. This is because, in the corrugating machine 28, the fin material 2
When the fin material 2 is taken into the fin forming teeth 41,
This is because a slight change occurs in the movement amount of the fin 5, and this change is absorbed by the slack of the fin material 25, and the notch 24 is formed stably in the notch processing step 27.

After the corrugating process, the process proceeds to a pitch adjusting process by the pitch adjusting device 29, where the fin pitch of the fin material 25 formed in a corrugated shape is adjusted. That is, the pitch adjuster 29 includes a pitch filling machine 42,
Equipped with an intermediate filling machine 43 and a pitching machine 44,
By the pitch filling machine 42, the corrugating machine 28
And a pitch filling step of temporarily filling the fin pitch. After that, the fin pitch is adjusted by the intermediate filling machine 43 and the pitching machine 44 so as to have the set pitch.

The number of fins 25 formed at a predetermined fin pitch in this manner is counted by a set hill number feeder 45 (for example, a feed worm gear), and the fin material 25 continuous for each predetermined hill number is cut by a cutting machine. Then, the fins 4 are cut with a predetermined length.

In a subsequent assembling step (not shown), the tubes 3 and 7 are inserted into the pair of tanks 2a, 2b, 6a and 6b, and assembling is performed so that the integrated fin 4 extends between the tubes. A side plate 21 is attached to the outside of the stacked tubes 3 and 7 via fins 4 and fixed with a jig so as to maintain this state.

Thus, the two heat exchangers are arranged such that the heat exchange portions formed by laminating the fins 4 and the tubes 3 and 7 are opposed to each other and are not shifted, and the tanks 2a and 2b of the condenser 5 and the radiator The 9 tanks 6a and 6b are arranged adjacent to each other in a non-contact state such that the joint portions with the tubes 3 and 7 are arranged side by side. Then, if the whole is brazed in a furnace after applying the flux to the joint portion, the condenser 5 and the radiator 9 are integrally connected via the fins 4 and the side plates 21.

As described above, the notch 24 is formed in the fin material 25 sequentially when it passes between the pair of rotating rotators 33 and 35, so that the notch 24 can be formed easily and quickly. The notch 24 can be formed in accordance with the processing speed in corrugating, and the fins 4 having the notch 24 can be formed in a large amount in a short time with one forming line. .

Since the cutouts 24 are formed at intervals equal to the intervals at which the fins 25 are bent, the cutouts 24 are formed at each bent portion 4a in this example. By shifting the bending position, the formation position of the notch 24 can be formed in the flat portion 4b of the fin 4 as shown in FIG. 5, and the notch 24 can be formed at a designed position. It becomes possible.

In the above configuration, the case where one notch 24 is sequentially formed in the center of the fin material 25 has been described. For example, as shown in FIG. , 35, and three notches 24 are continuously formed in the center of the fin material 25, as shown in FIG.
May be formed as shown in FIG. In forming such a fin 4, the notch forming machine 27 of the fin forming apparatus shown in FIG. 3 may be replaced with the one shown in FIG.

As described above, in the present invention, the step of perforating the notch 24 in the fin material 25 by the rotating body having the perforating mechanism formed around the corrugating step is provided before the corrugating step. , The shape of the notch 24, the number of formations,
The main purpose is to easily and quickly form the notch 24 in the fin material 25 regardless of the formation position. Therefore, the shape, the number of formation, and the formation position of the notch 24 may be any. The invention is not limited to those shown in the examples.

In the above-described example, the cutout portion 24 is formed in the fin 4 laid over the two heat exchangers (the condenser 5 and the radiator 9). When a notch for preventing heat transfer is formed in a fin laid over the fin, the fin may be formed in the same manner.

[0048]

As described above, according to the present invention,
A step of forming a notch for preventing heat transfer at a stage prior to the corrugating process in a fin forming line having a corrugating process, and a rotating body having a perforation mechanism formed around the notch The notch can be formed easily and quickly, and the processing speed for forming the notch can be matched with the processing speed for forming the fin material in a corrugated shape. Therefore, even when these processes are provided on one molding line, the fins can be molded based on the processing speed of the corrugating process, and the same production efficiency as the conventional molding line without the notch machining process can be obtained. Can be maintained.

If the notch is formed in accordance with the interval at which the fin material is bent in the corrugating process, the notch is formed at the bent portion of the fin by adjusting the timing of bending the fin material. Can be formed in the flat part between the bent parts, and the number and shape of the notch part can be changed by changing the drilling mechanism formed in the rotating body. Can be formed.

Furthermore, if the fin material is slackened between the notch processing step and the corrugating processing step subsequent thereto, the fluctuation of the movement amount of the fin material at the time of shifting to the corrugating processing step is caused by the slack. Absorption can be ensured, and stable processing of the notch in the notch processing step is guaranteed.

[Brief description of the drawings]

FIG. 1 shows the overall configuration of an integrated heat exchanger according to the present invention. FIG. 1 (a) is a front view in which a middle part is omitted, and FIG. 1 (b) is FIG. It is a top view of (a).

2 shows a tube and a fin of the integrated heat exchanger according to FIG. 1, FIG. 2 (a) shows a perspective view thereof, and FIG. 2 (b) shows a side sectional view thereof. Show.

FIG. 3 is an explanatory view showing a fin forming apparatus and a fin forming process formed by the fin forming apparatus.

FIG. 4 is a view showing the notch processing machine and the corrugating processing machine of FIG. 3;

FIG. 5 is a diagram showing a case where the positions of the notches of the fin shown in FIG. 2 are changed.

FIG. 6 shows a case where three notches are continuously formed in a fin. FIG. 6 (a) shows a notch processing machine used at that time, and FIG. It is a perspective view which shows the completion state of the fin using a notch processing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2a, 2b, 6a, 6b Tank 3, 7 Tube 4 Fin 5 Condenser 9 Radiator 24 Notch 25 Fin material 27 Notch processing machine 28 Corrugating machine 29 Pitch adjusting machine 30 Cutting machine 32 Male mold 33, 35 Rotating body 34 female type

Claims (7)

[Claims] 1. A method of forming a fin, which is provided over a plurality of heat exchangers integrally connected and has a cutout for reducing heat transfer between adjacent heat exchangers. A corrugating process in which a continuous fin material formed at least in a width that can be laid across the exchanger is sequentially bent into a corrugated shape with movement in a continuous direction, and the fin material formed in the corrugated shape is formed into a predetermined length. A cutting step of cutting the notch in the fin material by rotation of a rotating body having a perforating mechanism formed therearound at a stage prior to the corrugating step. A method for forming a fin used in an integrated heat exchanger, the method comprising: 2. The method according to claim 1, further comprising a pitch adjusting step of adjusting a pitch of the fin material formed in a corrugated shape by the corrugating step to a predetermined pitch before the cutting step. For forming a fin used in an integrated heat exchanger of the present invention. 3. The notch processing step is characterized in that the fin is formed between a first rotating body having a male mold formed around the periphery and a second rotating body having a female mold receiving the male mold formed around the first rotating body. The method for forming a fin used in an integrated heat exchanger according to claim 1, wherein the notch is formed by passing a material through. 4. The integrated heat exchange according to claim 1, wherein the notch formed in the notch processing step is formed in accordance with an interval at which the fin material is bent in the corrugation processing step. A method for forming fins used in vessels. 5. The method according to claim 1, wherein a fin material is slackened between the notch processing step and the corrugating processing step. 6. A continuous fin material having a width that can be laid is supplied over a plurality of heat exchangers that are integrally connected, and the fin is rotated by rotation of a rotating body having a perforation mechanism formed therearound. A notch processing machine for forming a notch in the material, a corrugating machine for forming the fin material having passed through the notch processing machine into a corrugated shape, and a pitch of the fin material formed in the corrugated shape being a predetermined pitch And a cutting machine for cutting the corrugated fin material formed at the predetermined pitch into a predetermined length. The fin forming apparatus used in the integrated heat exchanger, . 7. The fin forming apparatus used in the integrated heat exchanger according to claim 6, wherein a fin material is slackened between the notch processing machine and the corrugating processing machine.