JPH0772678B2 - Heat exchanger - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger made of metal such as aluminum used as a condenser for car coolers.

[0002]

2. Description of the Related Art Recently, as a condenser for a car cooler, for example, a so-called multi-flow type heat exchanger capable of realizing high heat exchange performance and low pressure loss tends to be favorably used.

In this multi-flow heat exchanger, a pair of hollow headers are generally connected to both ends of a plurality of tubes arranged in parallel at predetermined intervals. Then, in this heat exchanger, for the purpose of allowing the heat exchange medium to flow in a meandering manner in the flow passage formed by the tube, the inside of one or both headers is provided at a predetermined position in the longitudinal direction. It may be divided by a partition member.

As a header partition structure of this multi-flow heat exchanger, conventionally, as shown in FIG. 13, a disk-shaped partition portion (62a) conforming to the inner peripheral shape of the header (61) is provided. A single partition plate (62) provided with a projecting edge portion (62b) that integrally projects radially outward in a certain region of the peripheral end is used, and this partition plate (62) is the header (61). It is inserted into the header (61) through the slit-shaped opening (63) in the circumferential direction formed on the side surface of the partition (62a) in the header internal space and the protruding edge (62b) in the slit-shaped opening ( The headers (61) are integrally joined to the header (61) by collective brazing in an arrangement state in which the headers (63) are kept. In addition, (64) is a tube and (65) is a corrugated fin.

[0005]

However, the relationship between the thickness of the partition plate (62) and the opening height of the slit-shaped opening (63) depends on the size and shape errors of the manufacturing and processing of the opening (63). The thickness of the partition plate (62) is designed to be slightly smaller than the width of the slit-shaped opening (63) so that it is not difficult or impossible to insert the partition plate (62) into the). Therefore, in the partition structure as described above, the partition plate (62) may slip out of the header (61) or be misaligned before it is fitted into the header (61) and before brazing is completed. Sometimes, the brazing was not done properly.

In view of the above-mentioned conventional drawbacks, the present invention provides a heat exchanger having a structure in which a partition member can be always brazed and integrated with a header in a proper arrangement state, and the reliability of the partition structure as a product is improved. The purpose is to increase.

[0007]

To achieve the above object, the present invention has a hollow header in which a plurality of tubes are connected in a communicating state, and the inside of the header has a slit in the circumferential direction formed on its circumferential side surface. A heat exchanger partitioned by a plate-shaped partitioning member inserted and arranged through a circular opening, wherein the partitioning member is provided at one position on the distal end side through a connecting part.
A pair of symmetrical partition plates connected to each other, and
By being bent at the connecting part, both partition plates are elastic at the base end side.
Not overlapped in a form that is easy to open
In this state, the partition member opens the slit-shaped opening.
By inserting and placing it in the header,
Of the base end side peripheral edge of both partition plates that are placed in the opening
Each was elastically abutted on the periphery of the slit-shaped opening
In this state, the header is integrally brazed by batch brazing
The gist is a heat exchanger characterized by being formed .

[0008]

In the above structure, the partition member is in a state in which each of the peripheral end portions on the base end side of the pair of partition plates which are coupled to each other is elastically brought into contact with the peripheral edge of the slit-shaped opening. Since it is placed in the header, this abutting action prevents the partition member from falling out of the header and causing misalignment before brazing, so that the partition member should always be in the proper placement state. It is brazed to the header.

[0009]

EXAMPLES Examples in which the heat exchanger of the present invention is applied to a car cooler condenser will be described below. Needless to say, the heat exchanger of the present invention can be applied to various multiflow type heat exchangers such as a room air conditioner heat exchanger and an oil cooler.

In the heat exchangers of the embodiments shown in FIGS. 2 and 3, (1) is a flat tube and (2) is a corrugated fin, which are alternately arranged in parallel in the vertical direction. (3) and (4) are left and right headers, which are connected to both ends of the flat tube (1) in a communicating state.
(5) is an inlet pipe of the heat exchange medium connected to the left header (3) in a communication state, and (6) is an outlet pipe thereof connected to the right header (4). Further, (7) is a plate-shaped partition member for partitioning the inside of the headers (3) and (4) at a predetermined height position, and the partition member (7) forms a flow passage constituted by a plurality of tubes (1). The heat exchange medium is made to flow in a meandering shape. In addition, (8) is a side plate arranged to protect the upper and lower outermost corrugated fins (2) for protecting the fins.

The flat tube (1) is made of an extruded aluminum material, and as shown in FIG. 1, the interior is divided into a plurality of chambers by partition walls to improve heat transfer performance, so-called harmonica. Tubes are used.
An electric resistance welded pipe or the like may be used regardless of the extrusion mold material.

The corrugated fin (2) is formed by forming an aluminum sheet material having substantially the same width as that of the tube (1) into a corrugated shape and cutting and raising the louver. An aluminum brazing sheet in which a brazing material layer is clad is used as the sheet material.

The header (3) is an end opening of a cylindrical header pipe (3a) which is formed by forming an aluminum brazing sheet having a brazing material layer clad on one or both sides in a state where both side edges are butted against each other. Is covered with an aluminum header cap (3b). The same applies to the header (4). The headers (3) and (4) are not limited to those formed by the side edge butting pipes of the brazing sheet as described above, and extruded pipes,
It may be manufactured by ERW pipe. On the side surface of the header (3), circumferential slit-shaped tube insertion holes (9) are arranged in rows in the longitudinal direction at predetermined intervals.

On the side surface opposite to the tube insertion holes (9), there is a slit-shaped opening (10) in the circumferential direction extending over approximately half the circumference of the header (3) at a position between the tube insertion holes (9). Has been formed. The slit-shaped opening (10) is formed in such a manner that the tube insertion hole (9) does not straddle the side edge butting portion (3c) of the header pipe (3a). (3c)
It is formed in a state of straddling.

[0015] Then, the partition member (7) is made symmetrical partition plates of a pair of aluminum (12) (13), phase via a connecting portion (15) in one position of the tip end <br /> Are connected to each other , and the connecting part (15) is bent.
By bending, the space between both partition plates (12) (13)
A flexible opening style that becomes larger on the proximal side than on the distal side
Are formed in a superposed manner. Partition board (1
2) As shown in FIGS. 1 and 5, 2) and 13) are disk-shaped partition parts (12a) (13a) that match the inner peripheral shape of the header (3) and the partition parts (13a), respectively. 12a) (13a
), A protruding edge portion (12a) (13b) integrally and radially outwardly protruded from the base end side semi-circular portion, and the protruding edge portion (12a).
) (13b) and ribs (12c) and (13c) connected in a rising manner in opposite directions to the peripheral edge of (13b). Further, as shown in FIGS. 4 and 5, one partition plate (12) extends from a position within the partition part (12a) to a boundary position with the projecting edge part (12b). Raises in a taper shape toward the (12b) side 1
Paired retaining ridges (14) (14) are provided.

The partition member (7) is formed by pressing two aluminum sheet partition plates (12) and (13) at a predetermined angle, for example, 90 degrees, as shown in FIG. Butt the ends together by brazing, and then bend both partition plates (12) and (13) around the connecting part (15).
Songs and ribs (12c) (13c) rising free form superimposed faces thereof on the side of being made by You Rukoto.

As another manufacturing method, an aluminum sheet is pressed so that the partition plates (12) and (13) have extremely short connecting portions at their tips (see FIG. 7). It is also possible to manufacture the intermediate processed product (17) which is connected through 16) in a developed state , and then bends this in the connecting part (16) to form an overlapping shape. is there. In this case, it should be designed so that a slight protrusion due to the connecting portion (16) in the superposed state is as small as possible. However, if the protrusion cannot be ignored, it can be corrected by finishing after manufacturing.

An aluminum brazing sheet is used as a raw material sheet used for manufacturing the partition member (7), and a brazing material layer is provided on each opposing surface of the partition plates (12) (13). ing.

The above heat exchanger constituent members are provided at both ends of a plurality of tubes (1) arranged in parallel at predetermined intervals.
The headers (3) and (4) are assembled by inserting the ends of the tubes (1) into the tube insertion holes (9), and the corrugated fins (2) are inserted and arranged between the tubes (1). (8), the inlet pipe (5), the outlet pipe (6), etc. are assembled, and at the same time, the partition member (7) is inserted into the header (3) through the slit-shaped opening (10), and FIG. And as shown in FIG. 5, the partition parts (12a) (13a) are arranged in the internal space of the header (3) and the projecting edge parts (12b) (13b) are arranged in the slit-shaped opening part (10). And rib (12c)
The heat exchanger assembly is assembled by arranging (13c) in a state of abutting against the inlet peripheral portion of the opening (10).

At the time of inserting the partition member (7), as shown in FIG.
With the base end side open and held around 5), that is, the base end side is held in an elastic open-handed manner.
Inserted in the header (3) in the closed state . This allows
The protruding edge portions (12b) (13b) of both partition plates (12) (13) are elastically brought into contact with the peripheral edge of the slit-shaped opening portion (10), and the partition member (7) becomes the header ( In 3), the positioning is maintained in a proper arrangement.

Moreover, since the retaining projections (14) (14) engage with the inner edge of the slit-shaped opening (10), the displacement of the partition member (7) in the removal direction is further improved. Certainly blocked. Since the raised portions (14) and (14) are formed so as to be inclined toward the base end direction of the partition member (7), they can be smoothly inserted into the header (3).

Then, the heat exchanger assembly, including the side edge butting portion of the header pipe (3a), is jointed and integrated with each other by collective brazing in the brazing furnace to produce a heat exchanger. It Until this brazing is performed, the partition member (7) is maintained in the proper arrangement state with respect to the header (3), and as a result, the partition member (7) is brazed to the header (3) in the proper arrangement state. Then, the partition structure is manufactured into a highly reliable heat exchanger.

The partition member (7) is made of an aluminum brazing sheet, and both partition plates (12).
Since the brazing material layer exists on the opposing surface of (13), the brazing material closes the gap by the collective brazing, and the sealing property in the header (3) is kept good. Needless to say, as a method for closing this gap, various methods such as brazing can be used in addition to using the brazing sheet as described above.

Further, as the partition member (7), a pair of partition plates (12) and (13) formed in a superposed configuration is adopted, so that compared to the case where ribs are formed on one partition member. As a result, the ribs (12c) (13c) can be made thinner, and therefore the ribs (12c) on the outer peripheral surface of the header (3) can be reduced.
By reducing the protrusion due to (13c), it is possible to manufacture a heat exchanger with high commercial value.

FIG. 8 and FIG. 9 show a modification of the partition member, particularly the elastic clearance (18) between the projecting edges (12b) (13c) of the partition plates (12) (13). Figure 9 but so formed, the partition plate (12) (13) by curving
It is formed so as to draw a slight curve in which the opposite side is concave in the side view width direction shown in FIG. Since the other points are the same as those in the above-described embodiment, the description thereof will be omitted. According to the present embodiment, due to this elastic clearance (18), both projecting edges (12b) (13c) of the partition member (7) are strong against the peripheral edge of the slit-shaped opening (10) of the header (3). The partition members (7) are brought into contact with each other while exhibiting a sprigback property, and a more reliable positioning state of the partition member (7) is achieved.

The embodiment shown in FIGS. 10 to 11 uses a partition member (7) having a small projection (19) at the tip thereof, and this is provided with a header (3) through a slit-shaped opening (10). The protrusion (19) is inserted into a small opening (20) of a suitable size formed on the side surface of the header facing the slit-shaped opening (10) in a state of being inserted and arranged inside. . The small protrusions (19) are formed such that the partition plates (12) (13) have a connecting portion (2) having a length approximately twice the wall thickness of the header (3) at the tips thereof.
An intermediate processed product connected through 1) is manufactured by pressing an aluminum sheet, and then bent at the center position of the connection part (21) in the lengthwise direction in the same manner as above to form a superposed shape. It can be manufactured by With such a configuration, the frictional action between the projection (19) and the small opening (20) is also added, and a good positioning state of the partition member (7) can be obtained. Moreover, the strength at the bent portion is enhanced, and the risk of breakage between the partition plates (12) and (13) is small.

The embodiment shown in FIG. 12 employs a partition member (7) having a structure without ribs or small projections.

[0028]

According to the above, the heat exchanger of the present invention is
The partition members are connected to each other through a connecting portion at one position on the tip side.
Having a pair of symmetrical partition plates connected to
By being bent at the part, both partition plates are elastic at the base end side.
In the form that opens freely, it is made into a laminated shape,
In this state, the partition member passes through the slit-shaped opening.
By inserting and arranging in the header, slit-shaped opening
Each of the peripheral edges on the base end side of both partition plates that remain in the mouth
This is in a state of being elastically abutted to the peripheral edge of the slit-shaped opening
Then, it is joined and integrated by batch brazing to the header.
Since it is made Te, the partition member, a resilient abutment against the header before brazing of the insert arrangement coercive
Then, it is possible to prevent the header from falling off or from being displaced. Therefore, according to the configuration of the present invention, the partition member can always be brazed and joined to the header in a proper arrangement state, and a highly reliable heat exchanger can be provided.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing a partition member, a header, a tube, and a fin in a separated state.

FIG. 2 is an overall front view of a heat exchanger.

FIG. 3 is an overall plan view of a heat exchanger.

FIG. 4 is a vertical cross-sectional view of a header showing a state in which a partition member is inserted.

FIG. 5 is a cross-sectional view of the header showing a state in which a partition member is inserted.

FIG. 6 is a side view showing an example of a method of manufacturing a partition member.

FIG. 7 is a plan view showing another example of the method of manufacturing the partition member.

FIG. 8 is a perspective view showing a modified example of a partition member.

9 is a side view of the partition member shown in FIG. 8 as viewed from the rib side.

FIG. 10 is a partial cross-sectional perspective view showing a heat exchanger according to another embodiment with partition members, headers, tubes, and fins separated.

11 is a cross-sectional view of the header showing a state where the partition member shown in FIG. 10 is inserted and arranged in the header.

FIG. 12 is a partial cross-sectional perspective view showing a heat exchanger according to still another embodiment with a partition member, a header, tubes, and fins separated.

FIG. 13 shows a conventional heat exchanger including a partition member, a header,
It is a partial cross-sectional perspective view which shows a tube and a fin in a separated state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tube 3, 4 ... Header 7 ... Partition member 10 ... Slit-shaped opening 12, 13 ... Partition plate 12b, 13b ... Peripheral protrusion

Claims (1)

[Claims] 1. A plate-shaped partition having a hollow header to which a plurality of tubes are connected in a communicating state, and the inside of the header being inserted and arranged through a slit-shaped opening in the circumferential direction formed on the peripheral side surface thereof. A heat exchanger partitioned by a member, wherein the partition member is mutually connected via a connecting portion at one position on the tip side.
Having a pair of symmetrical partition plates connected to
By being bent at the part, both partition plates are elastic at the base end side.
In the open- handed mode, the partition members are stacked , and in this state, the partition member passes through the slit-shaped opening.
By inserting and arranging in the header in the header, each of the partition plates existing in the slit-shaped opening is elastically abutted on the peripheral edge of the slit-shaped opening, and the peripheral edge of the partition plate is elastically abutted on the periphery of the slit-shaped opening. On the other hand, a heat exchanger characterized by being integrally joined by collective brazing.