JP3332428B2 - Stacked condenser and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer condenser used for a car cooler, a room air conditioner and the like.

[0002]

2. Description of the Related Art A stack type heat exchanger, that is, a plurality of plate-like tube elements integrally having a swelling tank portion at both ends of a flat tube portion are stacked so that the tank portions abut each other and communicate with each other. A heat exchanger joined and integrated by brazing has been conventionally favorably used as an evaporator.

On the other hand, as for the condenser, a serpentine type in which a single tube material is bent in a meandering shape to form a core has been the mainstream for a long time. There is a limit in reducing the radius of curvature of the heat exchanger, and there is a drawback that the degree of freedom in designing the space between the heat exchange tubes is narrow. There is a tendency that a multi-flow or parallel-flow type heat exchanger in which a hollow header is connected to both ends of the tube in a communicating state is preferably used.

[0004] However, in the multi-flow type condenser, in addition to the tube material, a hollow header having a proprietary configuration and relatively difficult to manufacture is separately designed and manufactured in addition to the tube material. In some cases, resulting in manufacturing disadvantages.

[0005] Therefore, application of the above-mentioned stacked heat exchanger to this condenser has been studied. Since this laminated heat exchanger has a basic structure of laminating tube elements integrally having a tank portion at both ends, a hollow header as in the multi-flow type is unnecessary, and the design and production are not required. It can be advantageous.

[0006] However, in this laminated type heat exchanger, there has been almost no practical use of a condenser as a condenser. This is due to the following circumstances. That is, in the case of the condenser, unlike the case of the evaporator, since the refrigerant flowing inside has a very high pressure, it is required to make the heat exchanger structure excellent in pressure resistance.
However, in the stacked type, there has been a large problem in strength, such as each tank section being expanded by the action of the high-pressure refrigerant and the heat exchanger being significantly deformed during heat exchange. Therefore, it is conceivable to increase the thickness by increasing the thickness of the tank portion, but since the tank portion is integrated with the flat tube portion,
When the thickness of the tank portion is increased, the thickness of the tube wall of the flat tube portion is also increased, so that the heat exchange performance is rather deteriorated. It has been considered difficult or impossible to put a stacked-type condenser into practical use due to such difficulties in moving forward and backward.

An object of the present invention is to provide a stacked condenser which can be put to practical use under the above-mentioned conventional technical background.

[0008]

According to the above object,
The invention isA pair of forming plates (11) and (11) are overlapped
Swells at both ends of flat tube (8)
Plate-shaped Tubes Having Tank Shapes (9) (9)
Elements (1) and (1a) are tank parts (9) and (9)
In a state where they abut each other, and between the flat tube portions (8) and (8).
Laminated with corrugated fins (3) interposed
And each tank part (9) (9) group on both sides laminated
Pipes (17) and (17) as reinforcing rods (2)
Skewered so that both ends protrude through all tanks
And the pipes (17) and (17) are expanded, and
Each tank section (9) is closely attached to each tank section (9).
(9) and integrated into each pipe (17)
On the peripheral side wall of (17), the tank portions (9) and (9)
And a refrigerant circulation hole (20) that is open
Stacked condenser characterized by the followingIs the gist.

Further , the present invention provides a laminated type
A method of manufacturing a contractor, which swells at both ends of a flat tube portion (8).
Plate-shaped Tubes Having Tank Shapes (9) (9)
Each pair of forming preforms forming the element (1) (1a)
(11) (11) (11a) (11a)
Tube element (1) (1) (1a) (1a)
Corrugated tube interposed between flat tube portions (8)
And (3) are sequentially arranged in a superposed state to form a laminate.
Then, in each of the two tank parts (9) and (9) group,
Reinforcing rod (2) through pipe through holes (15) (15)
Pipes (17) and (17) as tanks
Insert it in a skewered state so that it penetrates and protrudes both ends
After that, in a state where the laminate is compressed in the overlapping direction,
The pipes (17) and (17) are expanded and the whole is temporarily assembled.
After brazing, the whole is brazed and integrated.
And a method for manufacturing a stacked condenser characterized by the above.

[0010]

In the above construction, during the heat exchange in which the high-pressure refrigerant is circulated, the expansion of each tank portion is suppressed by the action of the reinforcing rod integrally joined therewith. Little or no deformation occurs.

[0011]

Next, an embodiment of the present invention will be described.

It is needless to say that the condenser of the present invention can be used as a condenser for various uses such as a car cooler, a room air conditioner, and a refrigeration system.

In the stacked condenser shown in FIGS. 1 to 3, (1) is a plate-shaped tube element,
(2) (2) is a reinforcing rod, (3) is a fin, (4)
(4) is a side plate, (5) is a refrigerant inlet joint,
(6) is the outlet joint.

[0014] tube element (1) ... is one having Rise out like tank part (9) (9) integrally on both ends of the flat tube portion (8).

The tube element (1) is formed by laminating a pair of forming plates (11) and (11). Each of the forming plates (11) and (11) has a brazing material layer on both surfaces. It is composed of a clad aluminum brazing sheet.

As shown in FIG. 3, the two forming plates (11) and (11) are spaced apart from each other at the widthwise intermediate portion on the inner surface side of the intermediate portion constituting the flat tube portion (8). Folded bent ridge extending in the length direction (12)
... is molded. This rising ridge (12) ...
In a state where both the forming plates (11) and (11) are overlapped, the ridges (12) of one forming plate (11) and the ridges (12) of the other forming plate (11) have a width. The arrangement is such that the phases are different from each other in the directions. The height of each ridge (12) ...
1) (11) is set to be close to or in contact with the inner surface of the opposing forming plate in a state where (11) is superimposed on each other. In addition, it is advantageous in terms of design and manufacture that the pair of forming plates (11) and (11) are formed of the same standard molded product.

Further, the two forming plates (11) and (11) include:
Recesses (13) (13) for forming the tank portion are formed at both ends constituting the tank portions (9), and a reinforcing rod is provided at the center of the bottom wall of each of the recesses (13) (13). The through holes (15) and (15) through which (2) pass are formed.

As for the outermost end tube elements (1a) (1a), the end forming plates (11a) (11a) positioned on the outside are different from the other forming plates (11). It is formed of an aluminum phrasing sheet thicker than the wall thickness. At both ends, through holes (15) (15) through which the reinforcing rod (2) passes are formed in such a manner that the concave portion for forming the tank portion is omitted.

The fins (3) are corrugated fins formed by bending a strip-shaped aluminum sheet in a meandering manner.

The side plate (4) is formed by pressing an aluminum sheet into a channel material having a U-shaped cross section as shown in FIG. 3, and has through holes through which reinforcing rods (2) pass at both ends. (15) An opening is formed in (15).

Each of the reinforcing rods (2) and (2) is constituted by an aluminum pipe (17) and an aluminum lid member (18) for closing one end of the pipe (17). Refrigerant joints (5) and (6) are connected to the ends. The outer diameter of the pipe (17) is set so that it can be inserted into the through hole (15). Then, as shown in FIG.
In the peripheral side wall of 7), on one side different in phase from the direction of the flat tube portion (8) by 90 °, an opening is provided in the tank portion (9) of each tube element (1). Each tube element (1) on the other side
Are formed at intervals so as to straddle adjacent tank portions (9) (9).

The above components are combined in a temporary assembly state, and are brazed all together to produce a stacked condenser.

That is, from the end, the side plate (4), the end forming plate (11a) of the end tube element (1a).
), The forming plate (11), and the corrugated fin (3) are sequentially arranged in an overlapping manner. Further, as the continuation of the above, both the forming plates (11) (11) of the tube elements (1) and the corrugated fins (3) are alternately arranged so that the tank portions (9) abut each other.
It is repeatedly arranged in a superposed manner. Then, the forming plate (11) of the end tube element (1a), the end forming plate (11a), and the side plate (4) are sequentially superimposed to form a whole laminated state.

Next, the tank groups on both sides (9) ..., (9)
The pipes (17) and (17) are inserted in a skewered state through pipe through holes (15) and (15) in each of the..., And the pipes ( 17) Expand (17) and integrate the whole into a temporary assembly.

With the joints (5) and (6) and the lids (18) and (18) attached to the ends of the pipes (17) and (17),
Perform batch brazing. By this brazing, the entire brazing material of the both-side brazing material layers of each forming plate (11) is integrated by brazing. At the same time, the pair of forming plates (11) are joined to each other by brazing through the ridges (12). Thus, a stacked condenser is manufactured.

In the stacked condenser configured as described above, the tank groups (9)..., (9). Since the groups (9) ..., (9) ... are joined and integrated with the pipes (17) and (17) by brazing, their expansion and deformation are regulated, and the occurrence of expansion and deformation which is a problem as a condenser is prevented. Thus, its practical use can be realized.

In addition to the fact that the flat tube portions (8) of the tube elements (1) are joined together by the corrugated fins (3), the end forming plate (11a)
) (11a) is formed to be thick, channel materials are used as side plates (4) and (4), and the pair of forming plates (11) and (11) are flat tube portions. In (8), the bulge of the core portion composed of the flat tube portions (8) and the corrugated fins (3) is also suppressed during heat exchange by being joined to each other by the ridges (12). And finally exhibit excellent suitability as a condenser.

Further, since the forming plates (11) are made of a brazing sheet, an aluminum material which is not clad with brazing material can be used as the corrugated fins (3). The problem of shortening the life of the corrugating machine, which had been a problem when corrugating
The life of the molding machine can be extended, and the corrugated fins (3) can be molded in a cost-effective manner.

In addition, since it is generally required to reduce the thickness in the front-back direction of the condenser, it is necessary to braze the formed plates (11) having a short width in the front-back direction in a stacked state. There is a drawback that it is difficult to braze while maintaining a proper shape, such as the lamination state becomes unstable and the whole bends simply by laminating. Group (9)…,
(9) By making the pipes (17) and (17) pass through each of them, a stable laminated state without bending etc. can be easily obtained, and a laminated condenser with excellent shape accuracy can be manufactured stably. can do.

Of course, a pipe (17) provided with a refrigerant flow hole (20) which opens in each tank (9).
Are passed through the tank group (9), so that the distribution of the refrigerant to the flat tubes (8) is equalized, and efficient heat exchange is performed.

In the above embodiment, the pair of forming plates (11) and (11) are connected to each other by the raised ridges (12). A corrugated inner fin (21) is arranged between the forming plates (11) and (11) to form as shown in FIG. 4, or an inner plate (11) is formed as shown in FIG. By arranging 22), the forming plates (11) and (11) may be connected and joined together.

[0032]

As described above, according to the laminated condenser of the present invention, the reinforcing rods are passed through the tank groups on both sides in a skewered state, and the reinforcing rods are joined and integrated with each tank part. Therefore, the expansion of the tank during heat exchange is suppressed by the action of the reinforcing rod, and there is little or no deformation due to the expansion, so that practical use as a condenser can be realized.

[Brief description of the drawings]

FIG. 1 shows the overall configuration of a stacked condenser, wherein FIG. 1A is a front view and FIG. 1B is a side view.

FIG. 2 is an enlarged sectional view showing a joint between a pipe and a tank.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a sectional view showing a modified example of the flat tube portion.

FIG. 5 is a sectional view showing another modification of the flat tube portion.

[Description of Signs] 1 ... tube element 2 ... reinforcing rod 3 ... corrugated fin 8 ... flat tube section 9 ... tank section 17 ... pipe 20 ... refrigerant flow hole

Claims (10)

(57) [Claims] 1. A pair of forming plates (11) (11)
A plurality of plate-like tube elements (1) (1a) having swelling tank portions (9) (9) at both ends of a flat tube portion (8) formed in an assembled shape are formed into a tank portion ( 9). (9)
The flat tube portions (8) (8) with the butted ends facing each other
While being stacked with interposed arranged corrugated fins (3) between each tank portion of the stacked both sides (9)
(9) A group of pipes (17) (1) as reinforcing rods (2)
7) penetrates all tank parts so that both ends protrude
And the pipes (17) and (17) are expanded
Has been in close contact with each tank unit (9) (9), and integrally joined to each tank unit (9) (9) Rutotomoni, each pipe
(17) On the peripheral side wall of (17), the tank portion (9)
(9) A coolant circulation hole (20) opening inside is provided.
Laminated condenser characterized by comprising been. 2. The outermost end tube element.
Side plate (4) outside the center (1a) (1a)
(4) are arranged in an overlapping manner, and pipes (17) and (17) as the reinforcing rods (2) are
Pass through the side plates (4) and (4) and braze them
2. The multi-layer condenser according to claim 1, wherein the multi-layer condenser is integrated.
vessel. 3. An outermost end tube element.
(1a) An end forming press located outside of (1a)
Plate (11a) is the thickness of the other forming plate (11).
The lamination according to claim 1 or 2, wherein the lamination is formed to be thick.
Type condenser. 4. A pipe (17) as a reinforcing rod (2).
On the peripheral side wall of (17), the direction of the flat tube portion (8) is 90 °.
Each tube element on one side with different phase
(1) Opening in the tank (9),
Next to each tube element (1) on the other side
Each oval in a manner of straddling the matching tank parts (9) and (9)
Refrigerant flow holes (20) are opened at intervals.
Item 4. The multilayer condenser according to any one of Items 1 to 3. 5. Forming each tube element (1)
Each pair of forming plates ( 11) (11) has a flat tube section
In the widthwise middle part on the inner surface side of the middle part constituting (8)
Folded bent extension that extends in the length direction at intervals
The ridges (12) are formed on both forming plates (11) and (11).
In a state of being superimposed on one of the molding plates (11).
A ridge (12) and a ridge of the other forming plate (11)
(12) are arranged such that the phases are different from each other in the width direction.
And the ridges (12) are
(11) and (11) are opposed to each other with the
1 to 3 joined to the inner surface of the forming plate
5. The stacked condenser according to any one of 4. 6. A pair of each tube element (1).
Between the forming plates (11) and (11), a corrugated
An inner fin (21) is arranged to connect the forming plates.
The contact according to any one of claims 1 to 4, wherein the contact is joined.
Stacked condenser. 7. A pair of each tube element (1).
Formed between the forming plates (11) and (11)
The inner plate (22) is placed and the molding plates
The method according to any one of claims 1 to 4, wherein the joint is connected.
Stacked condenser. 8. A swelling tank at both ends of a flat tube portion (8).
Plural plate-shaped tube elements having portions (9) and (9)
(1) Each pair of forming plates (1) forming (1a)
1) (11) (11a) (11a) and adjacent tubes
Flat tube part of Bu element (1) (1) (1a) (1a)
(8) Corrugated fin interposed between (8)
(3) and sequentially overlapped shape disposed to a laminate and then each of the two tank portions (9) (9) group, pies
Through the through holes (15) and (15) to form a reinforcing rod (2)
All pipes (17) and (17) through all tanks
After piercing in a skewered state so that both ends protrude,
In a state where the laminate is compressed in the overlapping direction, the pipe
(17) Expand (17) and integrate it into a temporary assembly
After that, the whole is integrated by brazing and joining together
Manufacturing method of a laminated condenser. 9. An end tube element arranged on the outermost side.
(1a) The outer end forming plate (11a) of (1a)
Side plate (4) is further superimposed on the outside of a)
The pipe (1) extends through the side plate (4) to form the laminate.
Laminate according to 7) that transmural interpolating to claim 8, FEATURES
Method of manufacturing a type condenser. 10. The tube element (1) (1a)
Each pair of forming plates (11) (11a) to be formed
Aluminum braze clad with brazing layers on both sides
Claim 8
10. The method for producing a stacked condenser according to item 9.