JPH0545087A - Aluminum-made heat exchanger - Google Patents

Abstract

PURPOSE:To obtain an aluminum-made heat exchanger capable of protecting its tubes from damage and, what is more, mounting brackets having excellent strength without reducing corrosion effect. CONSTITUTION:Headers 3 and 4 are laid out on an aluminum-made header main body 5 having a notched portion 5a partially cut off in its radial direction longitudinally in such a fashion that they may clog a bracket-mounting pedestal 6 made of an aluminum extrusion material. Both are welded in one piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used for a car cooler condenser, an evaporator, a radiator, or the like.

[0002]

2. Description of the Related Art As a heat exchanger used in, for example, a condenser for a car cooler car, a plurality of flat tubes and corrugated fins are alternately stacked, and a pair of tubes is provided at both ends of each tube. The so-called header type, in which the hollow headers are connected in communication, is widely used.

In order to mount this type of heat exchanger on the mounting side of a vehicle body or the like, a bracket mounting member must be mounted on the heat exchanger. In such a case, conventionally, a bracket mounting member having a sandwiching portion having a U-shaped cross section is fitted into a core portion including a tube and fins so that the sandwiching portion is located on both front and rear surfaces of the core portion. In general, a method has been adopted in which a fastening member such as a bolt is inserted and tightened from the holding portion toward the other holding portion.

However, in the method of mounting the bracket mounting member by the method of inserting the fastening member such as the bolt into the core portion as described above, the tube is damaged when the fastening member is inserted and fastened, and the refrigerant leaks. There was a risk of causing it. In particular, as in recent years, the tube pitch is set small, and the plate thickness of the tube is set thin.

In addition, aluminum heat exchangers provided in recent years have been subjected to anticorrosion treatment with zinc or the like. If such dissimilar metals are directly contacted with each other, the anticorrosion effect is reduced. Therefore, there is a problem that the iron bracket having excellent strength cannot be attached to the heat exchanger, and the thick aluminum bracket must be attached.

The present invention has been made to solve the above-mentioned problems, and is made of aluminum so that a bracket of iron or the like having excellent strength can be attached without damaging the tube and reducing the anticorrosion effect. It is intended to provide a heat exchanger.

[0007]

SUMMARY OF THE INVENTION In the present invention, however, a bracket mounting pedestal is attached to a header main body having a notch along the longitudinal direction as a header,
The bracket is attached using the pedestal.

That is, the present invention is an aluminum heat exchanger in which a plurality of flat tubes and fins are alternately laminated and a pair of hollow headers are connected to both ends of the tubes so that the headers are circular. An aluminum header main body having a cutout part that is cut out along the longitudinal direction in a part of the circumferential direction is arranged so that a bracket mounting pedestal made of an aluminum extruded material closes the cutout part and is integrally joined. The gist of the present invention is an aluminum heat exchanger, which is characterized in that

As the main body of the header, a brazing material layer is provided on at least one surface of the aluminum core material for the purpose of enabling brazing and bonding to the bracket mounting member and the tube at once in the furnace. It is desirable to use a brazing sheet having a coating formed thereon.

The header main body is notched along the longitudinal direction so that it can be easily manufactured without requiring high precision as in the conventional one in which corresponding edges are butted and joined and integrated. Part is formed. The formation position of the notch is not particularly limited, and may be formed with a phase difference of 180 degrees with the tube insertion hole,
Alternatively, they may be formed with a phase difference of 90 degrees.

The pedestal for mounting the bracket is made of an extruded aluminum material which is the same metal as the main body of the header. It is desirable to form a mounting portion such as a bracket mounting hole on the mounting pedestal for the purpose of easily mounting the bracket thereto.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description based on an embodiment in which the present invention is applied to a multi-flow type aluminum heat exchanger as a condenser used in a car air conditioner.

In this specification, the term aluminum is used to include its alloy.

In FIG. 1, (A) is a heat exchanger main body, and the main body (A) is composed of a plurality of flat aluminum tubes (1) vertically arranged in a horizontal state and adjacent tubes ( 1) Aluminum corrugated fins (2) arranged between (1) and outside the outermost tube (1), and a pair of left and right headers arranged on both sides of the tube (1) and connected in communication with the tube (3)
It is composed of (4) and. The tube (1) is composed of a flat hollow extruded material made of an aluminum material. As the tube (1), it is possible to use a porous type which is called a so-called harmonica tube which is excellent in pressure resistance and heat conductivity, and an electric resistance welded tube or the like is used regardless of the extruded mold material. Is also good. In this case, for the same reason, it is preferable to provide a partition wall along the longitudinal direction by inserting, for example, a corrugated inner fin.

The corrugated fin (2) is a strip-shaped brazing sheet in which a brazing material layer is formed on both surfaces of an aluminum core material having a width substantially the same as that of the tube (1) and bent in a meandering shape. It is joined to the tube (1) by attachment. Corrugated fin (2)
In order to further improve the heat exchange efficiency, it is desirable to use a cut and raised louver (2a).

As shown in FIG. 2, the headers (3) and (4) include a header main body (5) having a notch portion (5a) which is partially cut out in the circumferential direction along the longitudinal direction, A bracket mounting base (6) for closing the notch (3a) of the header main body (5) and mounting the bracket (B).

The header main body (5) is formed by forming a brazing sheet in which a brazing material layer is coated on both front and back surfaces of an aluminum core material into a tubular shape such that its corresponding edges are spaced apart from each other, and at a predetermined interval. For each tube insertion hole (5
b) is a press-formed product in which holes are formed, and a notch portion (5a) along the longitudinal direction is formed at a part in the circumferential direction.

On the other hand, the bracket mounting base (6)
Is an extruded aluminum material having a concave portion (6a) which fits the outer peripheral surface of the header main body (5) on the side of the cutout portion (5a). Then, as shown in FIG. 2, a screw hole (6b) is formed on the outer side surface of the bracket (B).
Can be attached.

Then, the pedestal for mounting the bracket (6)
However, the recess (6a) is fitted and arranged in such a manner as to cover the cutout portion (5a) of the header main body (5), and is integrally brazed and joined by the brazing material of the header main body (5). It should be noted that, in such a fitting arrangement, the header main body (5) easily and surely maintains a predetermined radius of curvature, and the inside of the header (5) becomes a circular shape without unevenness in the joined state. For the purpose of doing so, as shown in FIG. 2, a stepped portion (6c) (6) corresponding to the wall thickness of the header main body (5) is formed in the concave portion (6a) of the bracket mounting base (6).
It is preferable to form c).

Both ends of the headers (3) and (4) are closed by lids (7) and (7).

As shown in FIG. 1, a heat exchange medium inlet pipe (8) is connected to the outer upper part of the left header (3) in a laterally protruding manner, while the same is connected to the lower outer part of the right header (4). The outlet pipe (9) is connected. Also, place the header (3) vertically at a position about one third from the upper end of the left header (3).
A partition plate (10) that divides the chamber is provided, while a partition plate (10) is also provided at a position approximately one-third from the lower end of the right header (4), and the total heat exchange constituted by the tube group is provided. The medium passage is divided into three upper and lower passage groups, and the heat exchange medium flows in a meandering manner in each passage group and flows out from the heat exchange medium outlet pipe (9), and is formed between the tubes (1) in the meantime. The heat is exchanged with the air flowing through the air flow gap including the corrugated fins (2) and condensed.

On the outer side of the outermost fin (2), as shown in FIG. 1, a side plate (11) made of an aluminum strip plate material having substantially the same width as the corrugated fin (2) is arranged.

In the above heat exchanger, the tube (1) is inserted into the tube insertion hole (5b) of the header main body (5).
One end of the tube is inserted and arranged, and the tube (1) is inserted into the tube insertion hole (5b) of the other header main body (5).
Insert the other end of. Then, the bracket mounting pedestals (6) and (6) are fitted in such a manner as to cover the cutout portions (5a) and (5a) of the two header bodies (5) and (5), and temporarily fixed using a jig (not shown). On the other hand, the corrugated fins (2) are arranged between the adjacent tubes (1), the corrugated fins (2) are also arranged outside the outermost tube (1), and the side plates (1) are arranged outside the corrugated fins (2).
1) is arranged and these are temporarily fixed.

Further, the lids (7), (7), (7) and (7) are respectively arranged on the upper and lower ends of the headers (3) and (4) and are formed on the bracket mounting pedestals (6) and (6). The inlet / outlet pipes (8) and (9) are inserted and arranged in the inlet / outlet pipe insertion holes (not shown).

After the temporary assembly is fixed as described above, the assembly is carried into a furnace or the like and the constituent members are collectively brazed and joined together, thereby completing the manufacturing of the heat exchanger.

When this heat exchanger is mounted on the mounting side of a vehicle body or the like, the base end portion (b) of the bracket (B) is attached to the bracket mounting base (6) as shown in FIGS. 1 and 2. Fasten and fix with screws (C) and attach via the brackets (B).

The bracket (B) may be made of iron having excellent strength. The present invention is not limited to the above-described embodiment, but also includes modifications such as those shown in FIGS. 3 to 6, for example.

As in the first modification shown in FIG. 3, the facing edge portion (1) on the side of the notch portion (15a) of the header main body (15).
5c) may be extended in parallel and the tip may be bent in the opposite direction while the bracket mounting pedestal (16) may be formed in a corresponding shape. Since other configurations are similar to those of the above-described embodiment, corresponding parts are designated by the same reference numerals and the description thereof will be omitted.

Further, as in the second modified example shown in FIG. 4, the notch portion (25a) of the header main body (25) is formed on the front and rear surfaces of the heat exchanger body (A), and the notch portion (25a) is formed. The bracket mounting base (26) may be joined and integrated so as to close 25a). Since other configurations are similar to those of the embodiment shown in FIG. 2, corresponding portions are designated by the same reference numerals and the description thereof will be omitted.

Alternatively, as in the third modification shown in FIG. 5, the opposing edge portion (35c) of the header main body (35) on the side of the cutout portion (35a) is extended in parallel, while the bracket mounting pedestal is mounted. (36) may be formed in a corresponding shape, and the bracket (B) may be attached to the front and rear surfaces of the heat exchanger body (A). Since other configurations are similar to those of the embodiment shown in FIG. 2, corresponding parts are designated by corresponding reference numerals and description thereof is omitted.

Further, as in the fourth modification shown in FIG. 6, the same header main body (45) as in the embodiment shown in FIG. 2 is used, while the bracket mounting base (46) is used.
As the facing edge portion (45c) of the header main body (45)
A groove (46c) that can be fitted into the groove (46c) and an inwardly projecting bulge (46d) at a portion corresponding to the screw hole (46b).
You may use what has (46d). By using the bracket mounting pedestal (46) having such a shape, it is possible to reduce the wall thickness and make the headers (3) and (4) compact, and yet to make the bracket mounting strength excellent. There is an effect that you can. Also,
As the groove portion (46c), a header body (4
If the opposing edge portion (45c) of 5) is fitted and a brazing reservoir groove portion (46e) is formed around the opposing edge portion (45c), more firm brazing and fixing can be performed.

[0032]

As described above, in the aluminum heat exchanger according to the present invention, the header has an aluminum header having a cutout portion that is partially cut out in the circumferential direction along the longitudinal direction. Since a bracket mounting pedestal made of an aluminum extruded material is mainly arranged and joined and integrated in such a manner as to close the cutout portion, when mounting the bracket, the bolt is attached to the core portion as in the conventional case. Therefore, it is not necessary to insert such a fastening member, and therefore it is possible to avoid the inconvenience that the tube is damaged at the time of inserting and fastening the fastening member and the refrigerant leaks. In particular, the effect is remarkable when the tube pitch is set small and the plate thickness of the tube is set thin as in recent years.

Further, since the bracket is mounted on the bracket mounting pedestal that is integrally joined to the header, the bracket is also subjected to anticorrosion treatment even if it is made of iron or the like having excellent strength. There is no fear of significantly reducing the anticorrosion effect of the aluminum heat exchanger,
It can be highly durable.

Further, since the bracket mounting pedestal is made of an extruded aluminum material, it can be mass-produced and the product cost can be reduced.

Furthermore, since the header main body has a notch along the longitudinal direction in a part of the circumferential direction, the brazing sheet is formed into a tubular shape as in the conventional case, and the corresponding edge is formed. Since it is not required to have strict dimensional accuracy as in the case where parts are brazed in a butt state, it is possible to manufacture relatively roughly. Moreover, since the notched part mainly of the header is joined and integrated in a state of being covered with the bracket mounting pedestal, it is rich in pressure resistance and
It is possible to provide a highly durable heat exchanger in which the risk of leakage of the heat exchange medium due to poor bonding is reduced.

[Brief description of drawings]

FIG. 1 (a) is a plan view of a heat exchanger according to the present invention, and FIG. 1 (b) is a right side view of the heat exchanger.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view corresponding to FIG. 2 showing a first modified example.

FIG. 4 is a sectional view corresponding to FIG. 2 showing a second modification.

FIG. 5 is a sectional view corresponding to FIG. 2 showing a third modification.

FIG. 6 is a sectional view corresponding to FIG. 2 showing a fourth modified example.

[Explanation of symbols]

 1 ... Flat tube 2 ... Fins 3, 4 ... Header 5, 15, 25, 35, 45 ... Header main body 5a, 15a, 25a, 35a, 45a ... Notch part 6, 16, 26, 36, 46 ... For bracket mounting pedestal

Claims (1)

[Claims] 1. An aluminum body in which a plurality of flat tubes (1) and fins (2) are laminated in an alternating arrangement, and a pair of hollow headers (3) (4) are connected to both ends of the tubes (2) for communication. In the heat exchanger made of aluminum, the headers (3) and (4) are formed by extruding aluminum into a main body (5) made of aluminum having a notch (5a) in which a part of the circumferential direction is cut out along the longitudinal direction. An aluminum heat exchanger, characterized in that a bracket mounting base (6) made of a mold material is arranged in such a manner as to close the cutout portion (5a) and is joined and integrated.