JP2000039284A - Laminated heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the mold cost, the cost of plate parts, and reduce the assembling cost of a heat exchanger cost, and simplify assembling of the core, promote automation, and prevent the plates from being erroneously assembled, and check the position of a partition portion of a header section with a naked eye in a laminate heat exchanger for a car cooler evaporator and the like by constructing the laminate heat exchanger only with use of one kind of plates. SOLUTION: A laminate heat exchanger includes many plates 2 of one kind, and at least one thin plate shaped partition member 9. The adjacent plates 2 are overlapped into layers in the state where recessed portions 3, 4 are opposed, whereby a parallel flattened pipe section 5 and upper and lower headers 6, 6 are formed. The thin relate shaped partition member 9 is interposed between bottom walls 7, 7 with holes of the upper and lower both headers formation recessed portions 4, 4 of the adjacent plates 2, 2 at a predetermined position to close a fluid passage hole 8 in the header formation recessed portion 4 and hence form a U shaped or meandering fluid passage as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, for example, in a laminated evaporator for a car cooler, it has been usual practice to form a refrigerant circuit using two or more types of plates.

That is, conventionally, a first plate having a recess for forming a fluid flow path and recesses for forming upper and lower headers deeper than the recess and having fluid passage holes formed in the bottom walls of the recess for forming both headers, respectively. A fluid passage hole is formed in one of the bottom walls of the upper and lower header forming recesses, and a fluid passage hole is formed in the other of the bottom wall of the upper and lower header forming recesses. A second plate having an unopened partition wall portion, and these two types of plates are superposed in layers in a state in which the adjacent ones face the concave portions,
A parallel flat tube portion and upper and lower header portions connected to each flat tube portion are formed, and one or more turns of the refrigerant flow through the parallel flat tube portion and the upper and lower header portions as a whole in a U shape or meandering shape. Refrigerant circuit was formed.

[0004]

However, if the evaporator is composed of two or more types of plates as in the conventional laminated type evaporator, two or more types of dies are required, and the cost of the dies is high. The number of parts increases,
There has been a problem that the assembly of the core is complicated, which makes automation difficult. In addition, plate assembly errors (such as misalignment) are likely to occur, making it difficult to check the position of the partition wall of the header after manufacture, and confirming whether the intended refrigerant circuit is formed in the evaporator. Cannot be confirmed, and there is a problem that a defective product may be generated.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to constitute a laminated heat exchanger such as a laminated evaporator by using only one kind of plate. Therefore, the mold cost is low, the number of parts is small, the core is easy to assemble, automation is easy, and there is no difference in plate assembling. The position of the partition can be easily checked, and it can be surely confirmed whether the intended fluid circuit such as refrigerant is formed in the heat exchanger. Another object of the present invention is to provide a laminated heat exchanger which has excellent workability, can reduce the time required for production, and can improve production efficiency.

[0006]

In order to achieve the above object, a laminated heat exchanger according to the present invention has a concave portion for forming a fluid flow path and a concave portion for forming both upper and lower headers, and has a concave portion for forming both upper and lower headers. A plurality of plates of one kind, each having a fluid passage hole formed in a bottom wall of the header forming recess;
At least one thin plate-like partition member for closing the fluid passage hole of the header forming recess of the plate, and the plates are stacked in a layered manner with adjacent ones facing the recesses, and And the upper and lower header portions connected to each flat tube portion are formed, and the perforated bottom walls of one of the header forming recesses of the upper and lower header forming recesses of the adjacent plate at a predetermined location. A thin plate-like partition member is interposed therebetween, and the fluid passage hole of the header forming recess is closed, so that the fluid as a whole flows in the U-shaped or meandering shape in all the flat tube portions and the upper and lower header portions. It is characterized in that a flow path is formed.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings.

In this specification, left and right, front and rear, and up and down are based on FIG. 2, left is the left side of FIG. 2, right is the right side, and front is the front side of the drawing sheet in FIG. The back means the back side, the upper side means the upper side in the figure, and the lower side means the lower side.

Referring to FIGS. 1 to 3, a laminated evaporator (1) for a car cooler is made of aluminum (including an aluminum alloy), and has a recess (3) for forming a coolant flow path.
And deeper upper and lower header forming recesses (4) and (4) and a bottom wall (7) (7) of the upper and lower header forming recesses (4) and (4)
And a plurality of plates (2) each of which is provided with a coolant passage hole (8) and a coolant passage hole (8) in a header forming recess (4) of the plate (2). Thin plate-shaped partition member
(9).

In this embodiment, the bottom walls (7) (7) of the upper and lower header forming recesses (4) (4) of each plate (2) have three substantially oblong refrigerant passage holes long in the front-rear direction. (8) Each of the holes (8) is opened, and an annular wall (14) protruding toward the inside of the header forming recess (4) is provided at the periphery of each of the refrigerant passage holes (8).

The above-mentioned plates (2) are layered on top of each other with the recesses (3) and (4) facing each other, and the parallel flat tube portions (5) and each flat tube portion ( 5) and both upper and lower header portions (6) and (6) are formed, and one of the upper and lower header forming recesses (4) and (4) of the plates (2) and (2) adjacent to each other at a predetermined position. A thin plate-like partition member (9) is interposed between the perforated bottom walls (7) (7) of the header forming recesses (4) (4).

As shown in detail in FIGS. 2 and 3, each of the thin plate-like partition members (9) has substantially the same shape and shape as the bottom wall (7) of the header forming recess (4) of the plate (2). Bottom wall of recesses (4) (4) for header formation of adjacent plates (2) (2) having a large oval shape
(7) By being interposed between (7), both bottom walls (7) (7)
These three refrigerant passage holes (8) are closed at once.

A bent edge for stopper (10) is provided on the outer edge of each thin plate-like partition member (9), and a header forming recess (4) of the adjacent plate (2) (2) is provided. When interposed between the bottom walls (7) and (7) of (4), the bent edge (10) is used for forming the header of the right plate (2) of the adjacent plates (2) and (2). It is in contact with the outer surface of the recess (4).

In this embodiment, the evaporator
Two thin plate-like partition members (9) are arranged in the front half and the rear half of the upper header (6) side of (1), and one thin plate is located in the center of the evaporator (1) on the side of the lower header (6). The shape partition member (9) is arranged, and the bottom wall (7) (7) of the recess (4) (4) for forming the upper header of the adjacent plate (2) (2) at each location
Each other, or the bottom walls (7) (7) of the lower header forming recesses (4) (4)
As shown in FIG. 4, the coolant passage holes (8) and (8) of the header forming recesses (4) and (4) are closed by the thin plate-like partition members (9) interposed between each other. A refrigerant flow path is formed in which the refrigerant flows in a meandering shape as a whole in all the flat tube portions (5) and the upper and lower header portions (6) and (6).

A rectifying projection (16), which is long in the vertical direction, is formed in the recess (3) for forming the refrigerant channel of each plate (2).
(3) is provided from the lower end to the upper end portion.

A pair of end plates (11) and (11) are disposed on both left and right outer sides of the evaporator (1).
Side plates (12) and (12) are superposed on both outer sides of (11) and (11), respectively. Corrugated fins (13) are interposed between the refrigerant flow passage forming recesses (3) and (3) of the plates (2) and (2) of the adjacent flat tube portions (5) and (5). Refrigerant channel forming recesses of the outer end plates (11) (11) and the plates (2) (2) of the flat tube portions (5) (5) on the same side as these
(3) Corrugated fins (13) are interposed between (3),
Corrugated fins (13) are interposed between the left and right end plates (11) and (11) and the side plates (12) and (12) on the same side.

[0017] Of the upper ends of the left and right end plates (11) and (11), a rectangular cylinder for refrigerant introduction (20) is provided at the upper end of the right end plate (11) with an upper header (6). And a refrigerant introduction pipe (22) is connected to a front end of the rectangular cylinder (20). At the upper end of the left end plate (11), a rectangular cylinder (21) for discharging refrigerant is provided with an upper header (6).
Is attached so as to communicate with the terminal end of the rectangular cylindrical body (21).
Is connected to a refrigerant discharge pipe (23) at the front end of the pipe.

Among the constituent members of the laminated evaporator (1), a number of intermediate plates (2), left and right end plates (1)
1) (11) and both left and right side plates (12) and (12) are made of aluminum brazing sheet, respectively, and have a thin plate-like partition member (9), corrugated fins (13), and a rectangular cylinder for introducing refrigerant. (20), and the rectangular cylinder for refrigerant discharge (21),
Each is made of bare wood. Note that the thin plate-like partition member (9) may be made of an aluminum brazing sheet.

The laminated evaporator (1) is manufactured by combining all the components described above and brazing them together by a vacuum brazing method.

In the above-mentioned laminated evaporator (1),
Evaporator (1) The refrigerant introduced from the refrigerant introduction pipe (22) on the right side to the start end of the upper header section (6) through the refrigerant introduction rectangular cylinder (20) on the same side is supplied to the upper header section (6). The flow is changed by two thin plate-like partition members (9) arranged in the first half and the second half, and one thin plate-like partition member (9) arranged in the center of the lower header (6). Eventually, the gas flows in a meandering shape as a whole inside the evaporator (1), and is discharged from the end of the upper header (6) to the outside via the refrigerant discharge rectangular cylinder (21) and the refrigerant discharge pipe (23). Things.

Here, each thin plate-like partition member (9) for closing the refrigerant passage hole (8) of the header forming recess (4) of the plate (2).
Pressure is only the flow path resistance of the refrigerant,
Since the pressure difference on both sides of (9) is about 0.2 kgf / cm ² , the thickness of the thin plate-like partition member (9) is 0.15
mm or less, usually about 0.1 mm is sufficient. Usually, the thickness of the plate (2) is about 0.3 to 0.5 mm.

On the other hand, the wind flows in the gap between the flat tube portions (5) of the evaporator (1) where the corrugated fins (12) exist in the front-rear direction.

According to the above-mentioned laminated evaporator (1),
Evaporator (1) using only one kind of plate (2)
Therefore, the mold cost is low, the number of parts is small, the core is easy to assemble, the automation is easy, and there is no difference in the assembly of the plate (2). No defective products.

After manufacture, the positions of the partition portions of the upper and lower header portions (6) (6) are adjusted by the presence of a thin plate-like partition member (9) interposed between predetermined adjacent plates (2) and (2). By evaporator
(1) can be visually confirmed from the outside, and whether a predetermined refrigerant flow path is set in the evaporator (1),
Can be easily checked, and occurrence of defective products can be prevented.

Also, in manufacturing the laminated evaporator (1), it is easy to assemble the components, the workability is good, the time required for the production of the evaporator (1) can be shortened, and the production efficiency is improved. I do.

Further, in the above embodiment, each plate
An annular wall (14) protruding toward the inside of the header forming recess (4) is provided at the periphery of the refrigerant passage hole (8) of the header forming recess (4) of (2). Fitting plate (2)
The periphery of the refrigerant passage holes (8) (8) in the bottom wall (7) (7) of the header forming recesses (4) (4) of (2) is Wall (14) (1
Since the cross section is substantially T-shaped according to 4), the strength of the peripheral portion can be greatly increased, and the occurrence of cracks can be prevented.

In the embodiment, each of the thin plate-like partition members (9)
A bent edge for stopper (10) is provided on the outer edge of the evaporator (1).
When the thin plate-shaped partition member (9) is inserted between the bottom walls (7) and (7) of the header forming recesses (4) and (4) of (2), the bent edge ( 10) serves as a stopper. However, the present invention is not limited to this point, and the insertion of the thin plate-like partition member (9) may be stopped by other appropriate means.

In the above embodiment, the plate
(2) Header forming recess (4) Header forming recess (4) (4)
Thin partition member that closes the refrigerant passage hole (8) in the bottom wall (7) (7)
(9), the refrigerant flow path in which the refrigerant flows in a meandering shape as a whole in all the flat tubes (5) and the upper and lower headers (6) and (6) of the evaporator (1). Although it is formed, it is sufficient that at least one thin plate-like partition member (9) is provided, and when only one thin plate-like partition member (9) is provided, the refrigerant flow path has a U-shape as a whole. Become.

FIG. 5 shows a modification of the present invention.

Here, the difference from the above embodiment is that in order to reduce the pressure applied to the thin plate-like partition member (9), the upper and lower header forming recesses of each plate (2) are used.
(4) The point is that six substantially circular refrigerant passage holes (8) having a small diameter are formed in the bottom wall (7) (7) of (4).

Since the other points of this modification are the same as those of the above embodiment, the same reference numerals are given to the same components in the drawings.

In the above embodiment and the modified example,
Bottom wall of the upper and lower header forming recesses (4) and (4) of the plate (2)
(7) Three substantially oblong refrigerant passage holes (8) which are long in the front and rear in (7),
Alternatively, six substantially circular coolant passage holes (8) are provided, but this is not a limitation, and at least one coolant passage hole (8) may be provided.

In the above embodiment, the present invention is applied to the so-called vertical laminated evaporator (1) in which the flat tube portions (5) are arranged vertically and in parallel. The present invention relates to a so-called horizontal laminated evaporator (1) in which flat tube portions (5) are arranged in a horizontal direction and in parallel.
The same applies to.

The present invention is used not only in a laminated evaporator for a car cooler but also in a laminated heat exchanger such as an oil cooler, an aftercooler, and a radiator.

[0035]

As described above, the laminated heat exchanger according to the present invention has the concave portion for forming the fluid flow path and the concave portions for forming the upper and lower headers which are deeper than the concave portion, and the bottom wall of the concave portion for forming the upper and lower headers. A plurality of plates each of which is provided with a fluid passage hole, and at least one thin plate-like partition member for closing the fluid passage hole of the recess for forming a header of the plate; Are stacked in layers with the recesses facing each other to form parallel flat tube portions and upper and lower header portions connected to each flat tube portion, and to form upper and lower header portions of adjacent plates at predetermined locations. A thin plate-like partition member is interposed between the perforated bottom walls of one of the header forming recesses among the recesses for use,
By closing the fluid passage hole of the header forming concave portion, a fluid flow path is formed in which the fluid flows in a U-shape or meandering as a whole in all the flat tube portions and the upper and lower header portions. Stacked heat exchangers can be constructed simply by using different types of plates. Therefore, only one type of die is required, which reduces the cost of the die, reduces the number of parts, and makes assembly of the core simple and automated. In addition, there is no difference in the assembly of the plates, and after the production, the laminar partition members appear in a predetermined arrangement on both the upper and lower surfaces of the heat exchanger. It can be visually confirmed, and it can be easily checked whether a fluid circuit such as a predetermined refrigerant is set in the heat exchanger, and therefore, no defective product is generated.
In addition, the workability is excellent, and the time required for the production of the stacked heat exchanger can be reduced, and the production efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a product of the present invention.

FIG. 2 is an enlarged sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged perspective view showing two plates and a thin plate-like partition member of the stacked heat exchanger of FIG. 1;

FIG. 4 is a perspective view schematically showing a fluid flow path of the laminated heat exchanger of the present invention.

FIG. 5 is an enlarged perspective view showing a modified example of the plate of the laminated heat exchanger of the present invention, which corresponds to FIG. 3,
A laminar partition member is shown with two plates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stacked evaporator (stacked heat exchanger) 2 Plate 3 Fluid flow path formation recessed part (refrigerant flow path formation recessed part) 4 Header formation recessed part 5 Flat tube part 6 Header part 7 Bottom wall 8 Fluid passage hole (refrigerant passage) Hole) 9 Thin partition member

Claims (1)

[Claims] An upper and lower header forming recess (4) having a fluid flow channel forming recess (3) and upper and lower header forming recesses (4) (4) which are deeper than the fluid flow channel forming recess (3). 7) (7) One type of multiple plates with fluid passage holes (8) and (8) respectively
(2) and at least one thin plate-like partition member (9) for closing the fluid passage hole (8) of the header forming recess (4) of the plate (2), and the plates (2) are adjacent to each other. The flat tubes (5) and the upper and lower headers (6) connected to the flat tubes (5) and the flat tubes (5) are stacked in layers with the recesses (3) and (4) facing each other. (6) is formed, and one of the upper and lower header forming recesses (4) (4) of the adjacent plates (2) and (2) at a predetermined location is formed of one of the header forming recesses (4) and (4). A thin plate-like partition member (9) is interposed between the perforated bottom walls (7) and (7), and the fluid passage holes (8) and (8) of the header forming recesses (4) and (4) are closed. In this way, a fluid flow path in which the fluid flows as a whole in a U-shape or meandering shape in all the flat tube portions (5) and the upper and lower header portions (6) (6) is formed. .