JPH0631336Y2 - Heat exchanger - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat exchanger used for a car cooler condenser, an oil cooler, and the like.

2. Description of the Related Art As a heat exchanger for a condenser used in the above-mentioned applications, for example, a conventional porous extruded flat tube called a harmonica tube is bent in a meandering shape, and fins are arranged between parallel portions thereof. A so-called serpentine type heat exchanger having a core was used. However, in such a serpentine heat exchanger, since the refrigerant passage is formed by one flat extruded tube, a large passage cross-sectional area cannot be ensured, and the extruded tube is bent in a meandering shape. Since the radius of curvature of the burr cannot be reduced by more than a certain value, the tube pitch cannot be reduced, which reduces the number of fins interposed between the parallel parts of the tube, resulting in poor fin efficiency. There was a limit to the improvement.

Therefore, as a heat exchanger to replace the serpentine type, flat tubes and corrugated fins are stacked in an alternating arrangement,
A so-called multi-flow type heat exchanger in which both ends of a tube are connected to a pair of hollow headers arranged in parallel has been proposed. According to this heat exchanger, since the tube pitch can be freely selected, a large refrigerant passage cross-sectional area can be secured, and the number of fins interposed between the tubes can be increased, which is small and has excellent heat exchange efficiency. You can do things.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the multi-flow type heat exchanger as described above, the refrigerant inlet pipe and the outlet pipe are connected to the header, but the mounting position of the heat exchanger on the vehicle body or the vehicle body In some cases, the inlet / outlet pipe must be formed in a long shape and routed in a predetermined arrangement due to the positional relationship with the side pipe or the like. In this case, it is necessary to fix the inlet / outlet pipe in order to prevent it from swaying, but in the past, the clamp base etc. was fixed to the heat exchanger mounting bracket on the vehicle body by spot welding, etc. , This clamp base was supposed to support the inlet and outlet pipes. For this reason, when the support position of the inlet / outlet pipe is away from the mounting bracket to which the clamp base is fixed, the length of the clamp base must be increased, leading to a decrease in strength. There was a drawback that it caused an increase.

The present invention has been made in order to solve the above drawbacks, and when fixing a fixed member such as a long inlet / outlet pipe, the strength can be easily reduced without increasing the strength regardless of the supporting position. The purpose of the present invention is to provide a multi-flow type heat exchanger that can support the above.

Means for Solving the Problems In order to achieve the above object, the present invention focuses on a side plate which is usually arranged outside the outermost fin in the above-mentioned Macchiflow type heat exchanger. The refrigerant inlet and outlet pipes are supported by Pupert.

That is, according to the present invention, referring to the reference numerals of the drawings, a pair of headers (5) and (6) arranged in parallel with each other are arranged in parallel between both headers, and both ends are connected to the header for communication. A plurality of tubes (1) and fins (2) arranged between adjacent tubes and outside the outermost tube,
In a heat exchanger including side plates (3) and (4) arranged outside the outermost fin, a refrigerant inlet / outlet pipe (8) (9) connected to the header is provided at a side edge of the side plate. ) And the like through a clamp piece (12), and a supporting projection piece (4a) is fixed to the clamp piece (12), and the clamp piece (12) surrounds the peripheral surface of the fixed member with a plate-shaped member. By forming a folded shape in the plate thickness direction, the peripheral surface of the fixed member is supported in a sandwiched state, and the clamp piece (1
2) is fixed to the supporting projection (4a) with a screw.

Action Supporting projection piece (4a) extended to the side edge of the side plate (4)
Is generally provided in a bent state on the fin side.
On the other hand, the clamp pieces (12) are attached to the fixed members such as the inlet and outlet pipes (9) and (8) that need to be fixedly supported. Then, the clamp piece (12) is fixed to the support projection piece (4a) by screwing or the like. The extension position of the support protrusion (4a) may be determined in advance corresponding to the intended support position.

In addition, the clamp piece (12) surrounds the peripheral surface of the fixed member such as the refrigerant inlet / outlet pipe and folds the plate member in the plate thickness direction so that the peripheral surface of the fixed member is sandwiched. Since it is supported, only the thick part of the clamp piece exists outside the peripheral surface of the fixed member supported by the clamp piece (12) except the portion toward the protruding piece. It is possible to minimize the protrusion of the clamp piece (12) around the fixing member. Moreover, since the peripheral surface of the clamp piece is sandwiched by the widthwise portion of the plate-shaped member forming the clamp piece (12), a large contact area between the clamp piece (12) and the fixed member can be secured.

Embodiment Next, the constitution of the present invention will be explained based on an embodiment applied to a condenser for a car cooler made of aluminum or an alloy thereof. In the following description, the term aluminum is used to include its alloy.

In FIGS. 1 to 4, (1) is a plurality of aluminum tubes vertically arranged in a horizontal state, and (2) is an aluminum tube interposed between adjacent tubes (1) and (1). It is a corrugated fin. Tube (1)
Is composed of a flat extruded die made of aluminum. The tube (1) may be of a so-called harmonica tube that is porous. Further, an electric resistance welded tube may be used instead of the extruded shape member. The corrugated fin (2) has almost the same width as the tube (1), and is joined to the tube by grate. As the corrugated fin (2), it is preferable to use a louver cut and raised. (3) and (4) are aluminum side plates, which are arranged outside the upper and lower outermost corrugated fins (2) and fixed by brazing. (5) and (6) are left and right paired hollow headers, each of which is formed of one aluminum pipe member having a circular cross section. Each hollow header (5) (6)
As shown in FIG. 4, tube insertion holes (7) are formed at intervals along the length direction, and both ends of each tube (1) are inserted into the holes and are brazed. It is firmly joined and connected. Such brazing is a header (5)
(6) is formed by an electric resistance welded pipe of a brazing sheet in which a brazing material layer is formed on either the outer surface or the inner surface, and the corrugated fin (2) is formed by a brazing sheet. (2), the site plates (3) and (4) and the headers (5) and (6) are brazed together in a vacuum heating furnace or the like.

Further, a short refrigerant inlet pipe (8) is connected to the outer surface of the upper end portion of the left header (5), and a long refrigerant outlet pipe (9) is connected to the lower end portion thereof by brazing. The outlet pipe (9) is bent so as to extend below the side plate (4) so that it does not project outward and get in the way. The upper end of the left header (5) and the upper and lower ends of the right header (6) are closed, and the left header (5) is provided with three partition plates (10) that divide the inside into four chambers in the vertical direction. Meanwhile, the right header (6) also
A partition plate (11) is provided at a position corresponding to an intermediate portion in the height direction between each partition plate (10) and the partition plate (10). By installing the partition plates (10) and (11), the refrigerant flowing from the refrigerant inlet pipe (8) into the left header (5) flows in a meandering manner over all the refrigerant passages constituted by the tube (1) group, and the refrigerant flows. The air flowing out from the outlet pipe (9) and including the corrugated fins (2) formed between the tubes (1) and (1) is formed between them by an arrow (W) in FIG.
The heat is exchanged with the air flowing in the direction indicated by, and the air is condensed.

In Fig. 1, (14) is the left and right headers (5).
It is a bracket for mounting a heat exchanger provided in (6).

The side plates (3) and (4) are formed to have substantially the same width as the corrugated fins (2), and both ends in the length direction are bent at right angles to the fin side, and the outermost corrugated fins are formed. (2) It is arranged so as to enclose (2). By the way, at the middle portion in the length direction of the lower side plate (4), vertical upright supporting protrusions (4a) (4a) are extended to face each other at both side edges thereof, and one side supporting plate is supported. The projecting piece (4a) has a bolt insertion hole (4b), and the other supporting projecting piece has a screw hole (4a (c)). On the other hand, the refrigerant outlet pipe (9) has a clamp piece below the support protrusion.
(12) is installed. The clamp piece (12) supports the peripheral surface of the outlet pipe in a sandwiched state by forming a plate-shaped member around the peripheral surface of the outlet pipe (9) and folding it in the plate thickness direction. The clamp piece (12) has a through hole for the one support projection piece (4a) through the upper protruding portion (12a).
(4b) is inserted and the other supporting projection (4a) is integrally fixed to the supporting projection (3a) by a bolt (13) screwed into the screw hole (4b (c)). As a result, the refrigerant outlet pipe (9) has its peripheral surface widely supported by the cramp piece (12) and is prevented from swinging. The supporting projection (4a) has its formation position determined in advance corresponding to the clamp position of the refrigerant outlet pipe (9), but it is not necessarily provided at one central portion of the side plate (4). However, the fixing position of the clamp piece (12) can be selected by providing a plurality of pieces in an appropriate arrangement.
Further, it is not always necessary to provide both side edges of the side plate, and the clamp piece may be provided only on one side to screw the clamp piece. Furthermore, if necessary, a long supporting protrusion may be provided over the entire length of one or both side edges of the side plate (4). Also, the support protrusion (4a)
Does not necessarily have to be bent to the fin side, but may be bent to the outside, or may be used in the state of being horizontally projected.

The refrigerant inlet pipe (8) is attached as follows. That is, as shown in FIG. 5 (a), the insertion end of the refrigerant inlet pipe (8) is formed in the large-diameter portion (8a), while the peripheral wall of the header (5) is pierced by burring and the large-diameter portion is formed. A flange (5a) having an inner diameter slightly smaller than the outer diameter of (8a) is formed. Then, as shown in FIG. 5 (b), the large diameter portion (8a) of the inlet pipe (8) is inserted into the corresponding fitting hole (5b) of the header (5).
It is forcibly fitted to and fixed by brazing. With this structure, the inlet pipe (8) can be brazed simultaneously with the brazing of the header and the tube,
The production efficiency can be improved. Further, the temporary removal of the inlet pipe (8) is prevented and the workability is improved. In order to carry out batch brazing, the refrigerant inlet pipe (8) is preferably made of an alloy excellent in age hardening as its material.

In the above embodiment, the heat exchanger having a structure in which the refrigerant outlet pipe (9) is formed long and clamped by the supporting projections (4a) provided on the lower side plate (4) is shown. The plate (3) may also be provided with a supporting projection to clamp the refrigerant inlet pipe (8) and other pipes.

Effect of the Invention According to the invention, as described above, since the supporting projections for supporting the fixed member such as the refrigerant inlet / outlet pipe by the clamp are provided at the side edges of the side plate, the short clamp piece is screwed. Only the fixed member such as the refrigerant inlet / outlet pipe can be easily supported. Therefore, while avoiding the decrease in strength when using a long clamp base, etc. and the increase in weight resulting from preventing this, it is a heat exchanger with a simple structure that is excellent in strength and has a lightweight pipe bearing structure. obtain.

Moreover, since the fixed member is supported by the support projection via the clamp piece, even if the outer diameter of the fixed member differs depending on the model, it can be dealt with by simply changing the clamp piece, and the common side plate is used. It is usable and efficient.

Further, the clamp piece supports the peripheral surface of the fixed member in a sandwiched state by surrounding the peripheral surface of the fixed member such as the refrigerant inlet / outlet pipe and folding and folding the plate member in the plate thickness direction. Therefore, only the thick part of the clamp piece exists outside the peripheral surface of the fixed member supported by the clamp piece, except for the portion toward the supporting projection piece. It can suppress the protrusion of the clamp piece to the minimum,
Inconvenience that the clamp piece becomes an obstacle to the installation of other equipment,
It is possible to prevent the disadvantage that the overall size of the heat exchanger is enlarged.

Furthermore, since the peripheral surface of the clamp piece is sandwiched by the widthwise portions of the plate-shaped member forming the clamp piece, a large contact area between the clamp piece and the fixed member can be secured, and the clamped member of the clamp piece can be secured. It is possible to secure a large supporting strength with respect to the support member, and by extension, a mounting strength of the fixed member with respect to the supporting protrusion.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view of the entire heat exchanger, FIG. 2 is a side view thereof, and FIG.
III-III line sectional drawing, FIG. 4 is a perspective view showing the left header, tube, corrugated fin and lower side plate separately, and FIG. 5 shows the mounting structure of the refrigerant inlet pipe. FIG. 3A is a sectional view showing a state before attachment of the refrigerant inlet pipe, and FIG. 3B is a sectional view showing a state after attachment. (1) ... tube, (2) ... corrugated fin, (3)
(4) ... side plate, (4a) ... supporting projection, (5)
(6) ... Header, (8) ... Refrigerant inlet pipe, (9) ... Same outlet pipe, (12) ... Clamp piece.

Claims (1)

[Scope of utility model registration request] 1. A pair of headers (5) arranged in parallel.
(6), a plurality of tubes (1) arranged in parallel between both headers and having both ends communicating with the header (1), and fins (2) arranged between adjacent tubes and outside the outermost tube And a side plate (3) (4) arranged outside the outermost fin, in a side wall of the side plate, a refrigerant inlet / outlet pipe (9) connected to the header. A supporting projection piece (4a) for fixing a member to be fixed such as (8) with a clamp piece (12) by screwing is extended, and the clamp piece (12) is a plate-shaped member to be fixed member. By surrounding the peripheral surface of the to form a folded shape in the plate thickness direction, the peripheral surface of the fixed member is supported in a sandwiched state, and the clamp piece (12) to the support projection (4a). A heat exchanger characterized by being fixed by screws.