JPH0663713B2 - Heat exchanger - Google Patents

Description

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

Conventional technology A perforated flat extruded tube called a harmonica tube is bent in a meandering shape, and a fin is arranged between the parallel parts to form a core, instead of a so-called serpentine type heat exchanger, As shown in FIG. 8, a plurality of flat tubes (1) and corrugated fins (2) are laminated alternately, and both ends of each tube (1) are connected to a tubular hollow header (3) (4). The so-called header type heat exchanger has been provided and is in the limelight. Such a header type heat exchanger has an advantage that it can be made more compact and lighter than a serpentine type heat exchanger.

By the way, in order to attach the header type heat exchanger to a vehicle body of an automobile or the like, attachment brackets (18) are provided on both upper and lower edges of a core portion composed of a tube (1) and fins (2). ) (19) is fixed with screws,
The brackets (18) and (19) are attached to the vehicle body or the like.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the case where the brackets (18) and (19) are mounted, the total weight increases correspondingly, and a lightweight header type heat exchanger is replaced with a serpentine type heat exchanger. Not only is it heavy, but the number of parts is large and the productivity is poor and the manufacturing cost is high.

The present invention has been made in view of the above-mentioned problems, and is a header type that can be easily attached to a vehicle body or the like while maintaining a reduction in total weight and without increasing manufacturing costs. The purpose of the present invention is to provide a heat exchanger.

MEANS FOR SOLVING THE PROBLEMS Then, the heat exchanger according to the present invention adopts a lid body having a locking structure for a vehicle body or the like as a lid body attached to the lower end portion of the header, and uses this lid body. It is designed to be attached directly to the vehicle body.

That is, the present invention is a heat exchanger in which flat tubes of a predetermined length and fins are laminated in an alternating arrangement, and a pair of hollow headers are communicatively connected to both ends of the tubes, wherein the header is one side or A hollow molded pipe is used in which a double-sided brazing sheet is formed into a tubular shape such that both side edges are in abutting shape, and a cap shape having a downwardly projecting locking projection at the lower end of the header is used. The heat exchanger is characterized in that the lid body is attached to the outside and the projection is locked in the corresponding locking hole on the mounting side so that it can be mounted on the vehicle body or the like. To do.

Since the working lid body has the downwardly projecting locking projection, the heat exchanger can be directly attached to the vehicle body or the like without using a bracket by using this projection.

As the header, a hollow molded pipe is used, which is formed by forming a single-sided or double-sided brazing sheet into a cylindrical shape so that both edges of the brazing sheet are in abutting shape, and a cap-shaped lid is externally fitted to the lower end of the pipe. Since it is attached in a state, when joining the abutting parts of the header, in order to prevent the abutting parts from opening, the above-mentioned joining can be performed easily and surely without using special opening preventing means. Is possible.

EXAMPLES Hereinafter, the present invention will be described based on examples applied to an aluminum heat exchanger for a condenser.

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

In FIGS. 1 to 7, (1) is a plurality of tubes arranged vertically in a horizontal state, and (2) is a corrugated fin interposed between the adjacent tubes (1) and (1). The tube (1) may be of a porous type such as a so-called harmonica tube. Further, an electric resistance welded tube may be used instead of the extruded mold material. The corrugated fin (2) has substantially the same width as the tube (1) and is joined to the tube (1) by brazing. The corrugated fins (2) are preferably cut and raised louvers.

(3) and (4) are left and right hollow headers with a circular cross section,
The tube (1) is connected to both ends of the tube, and a single-sided or double-sided brazing sheet is formed into a tubular shape such that both side edge portions (3c) (3c) of the brazing sheet are in an abutting shape. Further, a hollow molded pipe brazed to the side edge portions (3c) (3c) is used. The upper and lower ends of the headers (3) and (4) are closed by upper lids (5) and (5) and lower lids (6) and (6), respectively. The upper lids (5), (5) are formed in a cap shape having a peripheral wall (5a) projecting downward at the peripheral edge, and brazed in a state where they are fitted onto the headers (3), (4) properly. Are joined and integrated by. On the other hand, the lower lid (6) is
As shown in FIG. 3 and FIG. 4, it is formed into a cap shape having an upwardly projecting peripheral wall (6a) at the peripheral edge and a downwardly projecting locking projection (6b) at the center. The headers (3) and (4) are joined and integrated by brazing in a state where they are fitted onto the lower ends of the headers (3) and (4). The lower lid body (6) can be easily manufactured by pressing a single-sided or double-sided brazing sheet. Manufacturing by press working in this manner is advantageous because productivity can be improved. In addition,
Instead of the lid (6), as shown in FIG. 6, it has a peripheral wall portion (60a) projecting upward at the periphery and a solid locking projection (60b) projecting downward at the center. A cap body (60) formed in a cap shape may be used. The protrusion (6b) is for mounting the heat exchanger on the vehicle body or the like. In this embodiment, the locking hole (7) of the mounting plate (7) fixed to the vehicle body is used.
Locking hole (8a) of rubber material (8) for vibration absorption fitted in a)
It is supposed to be fitted to.

Further, as shown in FIG. 1, the refrigerant inlet pipe (9) is connected to the outer upper part of the left header (3), while the outlet pipe (10) is connected to the lower outer part of the right header (4). Has been done. The inlet / outlet pipes (9) and (10) are formed in a corresponding shape in which the header contact surface on the insertion end side is in contact with the headers (3) and (4), and can be easily positioned in the temporary assembled state, and By increasing the contact area with the headers (3) and (4), the connection can be made more firmly. Further, a partition plate (11) that divides the header (3) into two upper and lower chambers is provided at a substantially middle portion in the vertical direction of the left header (3), while it is below the middle portion in the vertical direction of the right header (4). A partition plate (11) is also provided at the position,
The refrigerant thus flowing into the left header (3) from the refrigerant inlet pipe (9) circulates in a meandering manner over all the refrigerant flow passages constituted by the tube group and flows out from the refrigerant outlet pipe (10). As shown in FIG. 5, heat is exchanged with the air flowing through the air flow gap including the corrugated fins (2) formed between the tubes (1), and the heat is condensed. It should be noted that (12) and (13) shown in FIG. 1 are upper and lower side piles arranged outside the outermost corrugated fin (2).

The heat exchanger of the illustrated embodiment is manufactured as follows. That is, as the header constituent member, a pipe material in which the inner surface of the aluminum pipe (3a) is coated with the brazing material layer (3b) is prepared. This tubing is a brazing sheet in which both sides or one side of an aluminum plate (3a) is coated with a brazing material layer (3b), so that the side edges (3c) (3c) of the brazing sheet are in abutting shape. A hollow molded pipe molded into a shape is preferably used. As the brazing material layer (3b), an Al-Si alloy having a Si content of about 6 to 13 wt% is generally used. Next, tube insertion holes (14) are provided in a row along the length of the pipe at predetermined intervals. The insertion hole (14) is preferably formed by forming it beforehand at a predetermined position of the brazing jig before the above-mentioned molding process.

Then, the upper lid (5) and the lower lid (6) are set to the headers (3) and (4) in an externally fitted state, and the end of the tube (1) is inserted into the insertion hole (14). Set. On the other hand, as the corrugated fins (2), those also made of a brazing sheet are prepared, and the fins (2), the side plates (12) and (13) and other parts are set in a predetermined arrangement state and temporarily assembled. The heat exchanger assembly thus manufactured is collectively brazed by vacuum brazing or the like.
After such brazing, the upper and lower lids (5) (6)
Is firmly joined and integrated with the headers (3) and (4), and other components are also firmly joined.

The condenser (A) manufactured as described above is arranged in parallel with the radiator (B), as shown in FIG. 7, for example, and is associated with the lower lid (6) of the condenser (A). The stopper projection (6b) is fitted into the locking hole (8a) of the vibration isolating rubber material (8) mounted on the mounting plate (7) of the vehicle body, and the lower tank portion (15) of the radiator (B) is also fitted. The locking projection (15a) formed on the lower end of the vehicle to project downward is fitted into the locking hole (8a) of the vibration isolating rubber material (8) also mounted on the mounting plate (7) of the vehicle body. . The upper side plate (12) of the condenser (A) and the central portion of the upper tank (16) of the radiator (B) are separated by a predetermined distance via a connecting bracket (17). It is fixed to an appropriate place on the vehicle body through the bracket (17). In the illustrated embodiment, the lids (6) and (6) having the same structure are fixed to the lower ends of the left and right headers (3) and (4), but two such lids are always required. However, the heat exchanger may be a single heat exchanger depending on the mounting manner of the heat exchanger on the vehicle body or the like.

As described above, in the heat exchanger according to the present invention, the cap-shaped lid body having the downwardly projecting locking projection is attached to the lower end of the header, and the projection is fitted to the corresponding locking side of the mounting side. Since it can be attached to the vehicle body or the like by being locked in the hole, a separate component such as a bracket becomes unnecessary, and it becomes unnecessary to separately attach the bracket or the like to the header. Therefore, it is possible to reduce the number of parts of the heat exchanger as a whole, simplify the parts management, assembling work, manufacturing process, etc., and reduce the parts cost, which leads to efficient production of a cheap and lightweight heat exchanger. Can be provided.

Moreover, as the header, a hollow molded pipe is used which is formed into a tubular shape so that one side or both sides of the brazing sheet are in a shape of abutting against each other on both side edges thereof.
Since the lid is attached to the external fitting state, it is not necessary to use a special opening preventing means for preventing the opening when the abutting portion of the header is joined. Therefore, the assembling and manufacturing process can be further simplified.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is a front view of a heat exchanger in a mounted state, showing a main part in section, and FIG. 2 is a plan view of the heat exchanger. Fig. 3 is a cross-sectional view showing the lower lid and its surroundings before attachment of the heat exchanger, Fig. 4 is an exploded perspective view of essential parts, Fig. 5 is a cross-sectional view taken along line V-V in Fig. 1, and Fig. 6 FIG. 7 is a sectional view showing a modified example of the lid, FIG. 7 is a partially cutaway sectional view showing a mounting state, and FIG. 8 is a front view of a conventional product. (1) …… Tube, (2) …… Fin, (3) (4)
...... Header, (3c) …… Side edge, (5) (6) …… Lid body, (6b) …… Locking protrusion, (7) …… Vehicle body (mounting plate), (7a) …… Corresponding locking hole.

Claims (1)

[Claims] 1. Flat tubes (1) and fins (2) having a predetermined length are alternately stacked, and a pair of hollow headers (3) and (4) are connected to both ends of the tubes (1) for communication. In the heat exchanger, as the headers (3) and (4), a single-sided or double-sided brazing sheet is formed into a tubular shape so that the side edges (3c) (3c) of the brazing sheet are in abutting shape. A hollow molded pipe is used, and a cap-shaped lid (6) having a downwardly projecting locking protrusion (6b) is attached to the lower end of the header (3) (4) in an externally fitted state. A heat exchanger characterized in that it can be attached to a vehicle body (7) or the like by locking the projections (6b) in the corresponding locking holes (7a) on the mounting side.