JPH08625Y2 - Heat exchanger - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat exchanger used in, for example, a condenser for a car cooler, an evaporator, a radiator, or the like.

2. Description of the Related Art As a heat exchanger used in, for example, a condenser for a car cooler, a plurality of flat tubes are arranged in parallel and corrugated fins are arranged between adjacent tubes, and both ends of each tube are cylindrical hollow. Connected to the header,
A so-called multi-flow type heat exchanger and a so-called serpentine type heat exchanger in which a flat tube is bent in a meandering shape and corrugated fins are interposed between parallel portions of the tube are known.

In order to attach the heat exchanger of this kind to a vehicle body or the like, stays for attaching the heat exchanger main body are attached along both upper and lower ends of the main body of the heat exchanger, and a bracket integrally provided on the stay. The heat exchanger body is attached to the vehicle body or the like via the.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in a heat exchanger including this type of stay, rainwater or the like penetrates particularly between the heat exchanger body and the stay attached to the lower end of the heat exchanger, and Due to the retention, the heat exchanger itself has a difficulty of being corroded at an early stage.

This invention has been made to solve the above problems, and prevents rainwater from accumulating between the heat exchanger main body and the stay attached to the lower end of the heat exchanger main body, thereby prematurely corroding the heat exchanger main body. It is an object of the present invention to provide a heat exchanger designed to prevent the above.

Means for Solving the Problems In order to achieve the above-mentioned object, a heat exchanger according to the present invention has at least a lower end portion of a heat exchanger body in which tubes for heat exchange medium and corrugated fins are alternately arranged. Along with this, in the heat exchanger to which the stay for mounting the main body is attached, a drainage hole is formed in a portion of the stay facing the lower end surface of the heat exchanger main body.

According to another aspect of the present invention, in order to achieve the same purpose, the stay is mounted on the heat exchanger main body such that a portion of the stay facing the lower end surface of the heat exchanger main body is located below the lower end surface of the main body. It is arranged so as to be separated from each other.

Water such as rainwater easily penetrates and stays between the heat exchanger body and the stays installed along the lower end of the heat exchanger. Since the holes are provided, the rainwater and the like can be reliably drained.

Further, in the case where the stay is attached to the heat exchanger main body in a state where the portion of the stay facing the heat exchanger main body is separated from the lower end surface of the main body below, the heat exchanger main body and the stay are attached. There will be no accumulation of rainwater, etc.

Therefore, in any case, premature corrosion of the heat exchanger body due to accumulation of rainwater or the like is prevented.

Example Hereinafter, an example in which the present invention is applied to an aluminum multi-flow heat exchanger for a condenser will be described.

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

1 to 4, (A) is a heat exchanger main body, and the main body (A) is a plurality of aluminum tubes (1) vertically arranged in a horizontal state and adjacent tubes. (1) An aluminum corrugated fin (2) interposed between (1) and (1).

The tube (1) is made of a flat extruded material made of an aluminum material. The tube (1) may be of a so-called harmonica tube of a porous type. In addition, an electric resistance welded tube may be used without depending on the extruded 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 (2a).

(3) and (4) are left and right aluminum hollow headers having a circular cross section, which are communicatively connected to both ends of each tube (1). The upper ends of the left and right headers (3) and (4) are closed by the upper lids (5) and (5), and the lower ends are closed by the lower lids (6) and (6).

Further, a heat exchange medium inlet pipe (7) is connected to an outer upper portion of the left header (3), while an outlet pipe (8) is connected to an outer lower portion of the right header (3). The inlet / outlet pipes (7) and (8) 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. In addition, as shown in FIG. 1, the header (3) is placed above and below the left header (3) at a position approximately one-third of the top of the left header (3).
A partition plate (9) that divides the chamber is provided, while the partition plate (1) is also provided at a position about one third from the lower end of the right header (4).
0) is provided, and the total heat exchange medium passage constituted by the tubes is divided into upper and lower three-stage passage groups, and the heat exchange medium flows in a meandering manner in each passage group, and the heat exchange medium outlet pipe (8) It is said that heat is exchanged with the air flowing through the air circulation gap including the corrugated fins (2) formed between the tubes (1) during this time to condense.

Note that (11) and (12) shown in FIG. 1 are upper and lower side plates arranged outside the outermost corrugated fins (2).

A lower stay (13) for attaching the main body to a vehicle body or the like is attached to a lower portion of the heat exchanger main body (A). The lower stay (13) has three pairs of holding pieces (U-shaped in cross section) having a common base portion (a portion facing the lower end surface of the heat exchanger body) (13a) at respective positions on the left side, the central portion, and the right side. 13b) (1
3c) (13d). Each holding piece is placed so as to face the heat exchanger main body (A) from below in a state of straddling the tube (1). In addition, from the bolt hole (14) of the one holding piece (13b) (13c) (13d) sandwiching the tube to the other holding piece (13b) (13c) (13d) of the other holding piece (13b) (13c) (13d).
The stay (13) is fastened and fixed to the heat exchanger body (A) by screwing a bolt (15) as a fastening member into the screw hole (14). A bolt insertion sleeve (16) is fitted around the outer periphery of the bolt (15), and the bolt (15) contacts the tube (1), fins (2) or the like to damage the tube or the like, or the bolt (15). ) Is taken into consideration to prevent the inconvenience that rust adheres to the tube. As the sleeve (16), one made of plastic, stainless steel or the like is preferably used. The sleeve (16) is simply formed in a cylindrical shape, but instead of this, a sleeve (17) having a protrusion (17a) on the inner peripheral surface as shown in FIG. 5,
Alternatively, as shown in FIG. 6, by using a sleeve (18) having a notch (18a) protruding to the inner peripheral surface by cutting a part of the peripheral surface inward,
The bolt (15) may be prevented from rattling with respect to the sleeves (17) and (18), and as shown in FIG. 7, a tapered sleeve (19) may be used. ) May be easily inserted.

A seal plate (20) having a U-shaped cross section is attached to the lower surface of the stay (13), and the plate (20) is attached.
Brackets (21) (21) are attached to the left and right sides of the bracket so as to project downward, and the brackets (21) (2)
Weld pins (22) and (22) are attached to the lower ends of 1).

By the way, a portion (13a) of the stay (13) facing the lower end surface of the heat exchanger body and the lower side plate (12) of the heat exchanger.
As shown in FIG. 1 and FIG. 2, is in a juxtaposed or substantially juxtaposed state, and water droplets, rainwater, etc. adhering to the surface of the heat exchanger body (A) permeate between them. And, it is easy to stay. Therefore, the heat exchanger body (A) may be corroded early by the rainwater. Therefore, in the heat exchanger according to this embodiment,
For the purpose of promptly draining the rainwater or the like, drainage holes (13e) (13e) are formed at appropriate portions of the side plate (12) facing the lower end surface of the heat exchanger body, that is, the base portion (13a). There is. In this embodiment, since the seal plate (20) is arranged adjacent to the lower surface of the stay (13), the plate (20) also has a drainage hole at a position corresponding to the drainage hole (13e). (20e) is drilled.

On the other hand, the upper part of the heat exchanger body (A) has the same base (23
A stay (23) having three pairs of holding pieces (23b) (23c) (23d) that share a) is attached via a bolt (15). A seal plate (25) having mounting pieces (24) (24) on both sides is attached to the upper surface of the base (23a) of the stay (23). Other points are substantially the same as those of the lower stay (13), and thus the description thereof is omitted.

FIG. 8 shows another embodiment, which is substantially the same as the above embodiment, but the holding pieces (13b) (13c) of the lower stay (13).
(13d) and upper stay (23) holding pieces (23b) (23
c) (23d) is formed to be slightly longer, and the bases (13a) (23a) of the stays (13) (23) are separated from the lower end surface and the upper end surface of the heat exchanger body (A) in the mounted state. It is in a state where it has been released. By separating them in this manner, rainwater or the like can be easily drained to the outside without accumulating. Since the other structure is the same as that of the above-described embodiment, the corresponding portions are designated by the same reference numerals and the description thereof will be omitted.

In the illustrated embodiment, a so-called multi-flow type heat exchanger has been described as an example, but a so-called serpentine type heat exchanger in which a tube is bent in a meandering shape and corrugated fins are interposed between parallel portions thereof is used. The present invention can also be applied to exchangers.

Further, in the above embodiment, the stay (13) has a drainage hole (13e) formed in the heat exchanger lower end surface facing portion (13a), and the stay (13) is separated from the lower end surface of the heat exchanger body. However, the stays having the drainage holes may be attached separately as described above.

Effect of the Invention As described above, the heat exchanger according to the present invention is provided at a portion of the stay facing the lower end surface of the heat exchanger body so that rainwater or the like does not stay between the heat exchanger body and the stay for mounting the body. Since the drainage hole is bored or the stay is attached to the heat exchanger body so that the portion of the stay facing the lower end surface of the heat exchanger body is spaced downward from the lower end surface of the main body. Therefore, it is possible to extremely easily and surely prevent early corrosion of the heat exchanger body due to the accumulation of the rainwater or the like without any special design change. Therefore, a heat exchanger having excellent durability can be provided at low cost.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an overall front view of a heat exchanger, FIG. 2 is a left side view of the same, FIG. 3 is a plan view of a lower stay, and FIG. Fig. IV-IV is an enlarged cross-sectional view, Figs. 5 to 7 are overall perspective views of the bolt insertion sleeve, and Fig. 8 is an overall front view corresponding to Fig. 1 showing another embodiment. . (1) …… tube, (2) …… corrugated fin,
(3) (4) …… Header, (13) …… Stay, (13
a) ... Heat exchanger main body lower end surface facing part (base), (13e)
…… Drainage hole, (A) …… Heat exchanger body.

Claims (2)

[Scope of utility model registration request] 1. A heat exchanger in which a stay for mounting the main body is attached along at least the lower end portion of the main body of the heat exchanger in which flat tubes and corrugated fins are alternately arranged. A heat exchanger, characterized in that a drainage hole is formed in a portion facing the lower end surface of the main body. 2. A heat exchanger in which a stay for mounting the main body is attached along at least a lower end portion of the main body of the heat exchanger in which flat tubes and corrugated fins are alternately arranged. A heat exchanger, characterized in that the stay is attached to a main body of the stay in a state where a portion of the stay facing the lower end surface of the main body of the stay is spaced downward from the lower end surface of the main body.