WO2002055947A1

WO2002055947A1 - Heat exchanger

Info

Publication number: WO2002055947A1
Application number: PCT/JP2002/000196
Authority: WO
Inventors: Soichi Kato; Shoji Akiyama; Jun Akaike
Original assignee: Zexel Valeo Climate Control Corporation
Priority date: 2001-01-16
Filing date: 2002-01-15
Publication date: 2002-07-18
Also published as: EP1359384B1; EP1359384A1; EP1359384A4; DE60235611D1; US20040050540A1

Abstract

A heat exchanger, comprising a tank (3) having tubes (21) for passing medium therethrough, an end plate (32) having tube insert holes (5) for connecting the tubes thereto, and a tank plate (31) connected to the end plate, wherein the tubes, end plate, and the tank are assembled and connected to each other by brazing in a heating furnace, the tank plate (31) is formed of plates having brazing materials (R1, R2) thereon, partition parts (311, 321) for prevention of outflow of brazing material having no brazing material thereon are provided on at least either of the tank plate (31) and end plate (32), the tank (3) comprises a partition plate (7) for partitioning the inside thereof, a brazing material is cladded on the inner surface of at least either of the tank plate (31) and the end plate (32), the partition plate (7) is formed of a bare material not cladded with the brazing material, and the end plate (32) is cladded with the brazing material on one face only and, at the time of brazing, the end parts of fins (4) are opposed to the face of the end plate (32) not cladded with the brazing material.

Description

Akitoda

Heat exchanger technical field

The present invention relates to a heat exchanger used in a heat exchange cycle mounted on a vehicle or the like. Gastric technique

In general, heat exchangers constituting a heat exchange cycle mounted on a vehicle or the like are known, for example, Laje, Capacitor, Evaporator, and the like. For example, a capacitor is formed by alternately stacking a plurality of flat tubes and a plurality of fins, assembling an end of the tube into a tube insertion hole of a tank, and using a brazing material clad in the tank or the tube to form a heating furnace. Are joined together. The condenser exchanges heat of the medium flowing through the sunset and the tube with the outside air. A partition plate is provided inside the tank to change the medium flow direction. In addition, brazing material may be provided on the outer surface of the tank to connect accessories such as connectors.

Further, it is desired that the heat exchanger used in the heat exchange cycle for vehicles be reduced in weight. For this reason, it is conceivable that each member constituting the heat exchanger is made of a material as thin as possible in consideration of safety. Normally, brazing filler metal contains silicon (Si), and when the brazing filler metal is melted in a heating furnace, aluminum (A1) or aluminum alloy, which is a material that constitutes tubes and tanks, and A1-Si eutectic A liquid phase is formed and each member is brazed and joined.

The liquidus temperature of the A 1 -Si eutectic liquid phase is lower than the liquidus temperature of aluminum or aluminum alloy constituting a tube or the like. Therefore, if an excessive amount of brazing material flows into a tube thinner than the tank in the heating furnace, A 1 on the tube surface reacts with the excessive amount of brazing material and a large amount of Al—S i. A eutectic liquid phase is formed, causing holes in the tube, In some cases, problems may occur such as the occurrence of noise and noise. Erosion is a phenomenon in which the molten brazing material erodes the base material.

Accordingly, an object of the present invention is to provide a highly safe heat exchanger in which an excessive amount of brazing material is prevented from flowing to the tube side, and each member is brazed and joined with an appropriate amount of brazing material. .

By the way, in a heat exchanger used for a condenser of an air conditioner of an automobile, a core is formed by alternately stacking a plurality of tubes and fins, and a pair of tanks are connected to and connected to both ends of the stacked tubes. ing. Closing members are attached to the upper and lower ends of both tanks, and an inlet joint for introducing the medium is installed at an appropriate place in one tank, and an outlet joint for discharging the medium is installed at an appropriate place in the other tank. I have.

Between the inlet joint and the outlet joint, a partition plate for partitioning the inside of the tank is provided at a required portion of the tank so that the medium flows in a meandering manner.

The above-mentioned tanks are generally cylindrical, and there are two-part tanks formed by assembling members having a substantially semicircular cross section, in addition to an integral tank. Of the members forming the two-part tank, the one provided with a hole connecting the end of the tube is called an end plate, and the other is called a tank plate. This two-part tank has the advantage that it is easy to process the hole that connects the ends of the tubes and to install the partition plate.

If there is a gap between the inner surface of the tank and the partition plate, a part of the medium is bypassed from this gap and the performance drops, so the dimensions of the partition plate must be strictly adjusted to the inner surface of the tank so that there is no gap Needed.

However, two-part tanks often have complicated cross-sectional shapes at the joint between the end plate and the tank plate, making it difficult to adjust the dimensions of the partition plate.

Accordingly, the present invention has been made in view of the above situation, and in a heat exchanger having a two-partition type tank, even if the dimensional control of the partition plate is not strictly performed, the leakage of the medium between the inner surface of the tank and the partition plate can be achieved. Does not occur, The purpose is to provide a highly dense heat exchanger.

As mentioned above, a heat exchanger such as a radiator or evaporator in a frozen cycle forms a core by alternately stacking multiple tubes and multiple fins, and connects the end of the tube to the tank. It is configured. Then, the medium is taken into the inside from the inlet joint provided in the tank, passes through the tube while exchanging heat by the heat transmitted to the core, and is discharged to the outside through the outlet joint provided in the tank. In some cases, a fan that sends air to the core may be provided outside the heat exchanger.

Further, this type of heat exchanger is manufactured by assembling aluminum or aluminum alloy members, and heat-treating the assembled body in a furnace so as to be integrated together.

Considering the heat exchange performance of such a heat exchanger, the gap between the fin and the sunset should be as small as possible. This is because if the gap between the fins and the tank is large, air leakage will occur from the gap and the heat exchange performance will decrease.

However, when the fins and the end plate are brought close to each other, there is a problem that at the time of brazing, the molten brazing material from the tank side goes around the ends of the fins, and the ends of the fins are melted by erosion. In other words, the fin has a small thickness, and the end portion has a disadvantage that unnecessary erosion is easily caused by the influence of the brazing material.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a heat exchanger in which erosion of a fin end portion by a brazing material is efficiently avoided. Disclosure of the invention

The invention described in claim 1 of the present application includes a tube that circulates a medium, an end plate having a tube insertion hole that connects the tube, and a tank that includes a tank plate that is connected to the end plate. And the above members are brazed and joined in a heating furnace. In the heat exchanger, the tank plate and / or the end plate are formed using a plate provided with a brazing material, and at least one of the evening plate and the end plate is provided with a brazing material outflow prevention portion provided with no brazing material. Configuration.

As described above, the heat exchanger is composed of two members, the tank plate and the end plate, and at least one of the end plate and the sunset plate is provided with an isolating portion for preventing brazing material from flowing out. In the heating furnace, the flow of the molten brazing material is prevented at the isolation portion.

Normally, in a heating furnace, the molten brazing material flows along the brazing material provided in the member and is drawn into a gap formed by assembling the members. An excessive amount of the molten brazing material accumulates particularly in the gap between the tube and the inlet of the tube and forms a large amount of an A1-Si eutectic liquid phase, so that erosion occurs in the tube in contact with the inlet of the tube. Likely to happen.

In the present invention, since at least one of the tank plate and the end plate is provided with an isolating portion for preventing the outflow of the brazing material without the brazing material, the brazing material is prevented from flowing at the isolating portion, and an excessive amount of the brazing material is provided. Does not flow out to the tube side. Therefore, erosion of the tubes constituting the heat exchanger can be prevented, and a highly safe heat exchanger can be provided.

For example, even in a case where the molten brazing material flows over the isolation portion in the heating furnace, the provision of the isolation portion reduces the flow amount of the molten brazing material to the tube side. It is possible to prevent the excessive amount of brazing material from flowing out to the tube side.

The invention described in claim 2 of the present application is the invention according to claim 1, wherein the end plate is provided with the separation portion on one surface in contact with the tank plate.

For example, when the tank plate is formed to have a substantially U-shaped cross section and the outer surface of the end plate is joined to the inside of the U-shaped opening to form a tubular tank, the edge of the end plate comes into contact with the tank plate . The isolating portion where no brazing material is provided is provided on one surface of an end edge of the end plate in contact with the dinner plate. In the heating furnace, the isolation unit is The flow of the brazing material provided on the sheet is prevented. Therefore, an excessive amount of brazing material does not flow out to the tube side, and the tube can be brazed to the tube inlet hole of the end blade with an appropriate amount of brazing material.

The invention described in claim 3 of the present application is the invention according to claim 2, wherein the tank plate is provided with a brazing material at least on a surface inside the tank, and the end plate is inside the tank. The brazing material is provided on the surface.

As described above, even when the brazing material is provided on both the inner surface of the tank of the tank plate and the inner surface of the tank of the end plate, the isolating portion is formed in the heating furnace. Prevents the flow of filter material provided on the tank plate and prevents excess brazing material from flowing out to the tube side.

The invention described in claim 4 of the present application is the invention according to any one of claims 1 to 3, wherein the tank plate is provided with an isolation portion on one surface in contact with the end plate.

For example, even when the brazing material is provided on the surface of the tank plate outside the tank, the isolating portion prevents the brazing material provided on the tamping plate from flowing, and an excessive amount of brazing material is tubed. Does not leak to the side

In the invention described in claim 5 of the present application, in the invention according to any one of claims 1 to 4, the tank is provided with a partition plate inside the tank, and the tank is positioned by the partition plate. The tank plate and end plate are assembled together.

As described above, the tank composed of the evening plate and the end plate is positioned by the partition plate provided inside the tank, so that the tank plate and the end plate are positioned. Deviation can be prevented.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the heat exchanger is formed as a tube by forming a _c- plate using a tube formed from a plate. Even if it is a plate, it is possible to form a tube that can ensure the required pressure resistance and the like. this Thus, when tubes formed from thin plates are used, the weight of the heat exchanger can be reduced.

Further, even when a thin tube is used, the above-mentioned separating portion prevents the flow of the brazing material, so that an excessive amount of the brazing material does not flow out to the tube side. Therefore, generation of erosion due to an excessive amount of brazing material flowing out to the tube side can be prevented, and a highly safe heat exchanger can be provided.

The invention described in claim 1 of the present application is the invention according to any one of claims 1 to 6, wherein the tube has a concave groove on an outer surface of the tube in contact with the tube insertion hole of the end plate. .

Thus, when the tube has the groove, the molten brazing material is drawn into the groove in the heating furnace. That is, since the filter material flows through the gap between the tube insertion hole and the tube and is drawn into the concave groove, the tube and the end plate are joined with an appropriate amount of brazing material, and brazing is performed. Defects can be avoided.

The invention described in claim 8 of the present application is directed to a heat exchanger including a tube through which a medium flows, and a tank to which the end of the tube is connected, wherein the tank is connected to an end of the tube. An end plate provided with a hole for connecting the end plate, an evening plate connected to the end plate, and a partition plate for partitioning the inside are brazed, and an inner surface of at least one of the tank plate and the end plate is formed. The partition plate is a heat exchanger having a configuration in which the brazing material is made of a base material that is not clad.

Conventionally, when a brazing material clad partition plate is used, the brazing material on the inner surface of the molten tank is integrated with the brazing material of the molten partition plate during brazing, and the brazing material is drawn by gravity and capillary action, and propagates through the partition plate. Was leaked to other places. As a result, the brazing material used to braze the partition plate was insufficient, and poor brazing of the partition plate occurred.

According to the invention, the partition plate must be free of brazing material. Since the brazing filler metal is used, the brazing filler metal on the inner surface of the tank that is melted during brazing hardly flows out along the non-wet partition plate. As a result, there is no shortage of brazing material for brazing the partition plate, and the partition plate can be satisfactorily brazed even if there is some gap between the inner surface of the tank and the partition plate.

Therefore, it is possible to provide a highly airtight heat exchanger that does not leak medium between the tank inner surface and the partition plate without strictly controlling the size of the partition plate as in the related art.

The invention described in a ninth aspect of the present invention is the heat exchanger according to the eighth aspect, wherein the tube has a groove-shaped concave groove on a surface.

The present invention is particularly effective in a heat exchanger using a tube having a groove-shaped groove on the surface.

If there is a groove-shaped groove on the tube surface, the molten brazing material on the tank inner surface will be sucked into this groove by capillary action and flow out to the tube side when brazing, so brazing the partition plate There was insufficient brazing material to be used, and poor brazing of the partition plate occurred.

According to the present invention, even if the brazing material on the inner surface of the tank flows out to the tube side, the brazing material does not flow out along the partition plate as in the conventional case, so that the amount of flow out is greatly reduced, and There is no shortage of brazing material for brazing the plate, and the partition plate can be brazed well.

The invention described in claim 10 of the present application is the heat exchanger according to claim 9, wherein the tube is formed by molding a plate material. The present invention is particularly effective in a heat exchanger using a tube formed of a plate material.

Since a so-called mouth forming tube formed by molding a plate material is formed by folding the plate material into a fold shape to form an internal partition, a groove-like concave groove is formed on the surface. For this reason, the molten solder on the inner surface of the tank during brazing Since the material was sucked into the groove by capillary action and flowed out to the tube side, the brazing material for brazing the partition plate was insufficient, and the brazing of the partition plate occurred.

According to the present invention, even if the brazing material on the inner surface of the evening water flows out to the tube side, it does not flow out along the partition plate as in the conventional case, so that the amount of outflow is significantly reduced, There is no shortage of brazing material for brazing the partition plate, and the partition plate can be brazed well.

The invention described in claim 11 of the present application includes a core formed by laminating a tube and a fin, and a tank connected to an end of the tube,

In a heat exchanger in which a medium flowing through a heat exchanger performs heat exchange by heat transmitted to the core, the tank is provided with an end plate provided with a hole for connecting the tube, and the end blade. The heat exchanger is provided with the tube, the fins, the end plate, and the tank plate, and brazed in a furnace, and the end plate is provided only on one side. A heat exchanger having a configuration in which a brazing material is clad, and at the time of the brazing, an end of the fin faces a surface of the end plate on which the brazing material is not clad.

According to such a configuration, erosion of the end of the fin due to the brazing material is efficiently avoided.

In other words, the fin ends are disadvantageous in that unnecessary erosion is likely to occur due to the effect of the brazing material. However, according to the present invention, the molten brazing material from the tank side is prevented from being brought to the fin ends. And such inconveniences are avoided.

Further, in consideration of the heat exchange performance of the core, it is preferable that the fin and the tank be as close as possible. In particular, when sending air to the core, if the gap between the fin and the tank is large, air leaks from the gap. In this regard, in the present invention, even when the fin and the tank are brought close to each other, there is no fear that the end of the fin causes erosion, and the heat exchanger is extremely Reasonably configured.

In the invention described in claim 12 of the present application, in claim 11, the shortest distance between the end of the fin and the surface of the end plate on which the brazing material is not clad is 2.0 mm or less. The configuration of the heat exchanger.

According to such a configuration, the heat exchange performance in the core is sufficiently ensured.

In other words, if the gap between the fins and the tank is large, this causes a decrease in heat exchange performance.In the present invention, however, the upper limit of the gap is set to 2 to avoid such a decrease in heat exchange performance. It is set to 0 mm.

The invention described in claim 13 of the present application is the heat exchanger according to claim 11, wherein an end of the fin is in contact with a surface of the end plate on which the brazing material is not clad.

«O

In other words, if the gap between the fins and the tank is large, this causes a decrease in heat exchange performance. In the present invention, these are abutted to avoid such a decrease in heat exchange performance. BRIEF DESCRIPTION OF THE FIGURES

【Figure 1】

FIG. 2 is a plan view illustrating a schematic configuration of a heat exchanger according to a specific example of the present invention.

【Figure 2】

FIG. 2 is an exploded perspective view showing a configuration of a tank according to a specific example of the present invention.

[Figure 3]

FIG. 4 is a cross-sectional view of a tank in which a tube is assembled according to the embodiment of the present invention ₍ FIG. 4).

FIG. 3 is an end view of a tube according to a specific example of the present invention.

[Figure 5]

FIG. 5 is a partially enlarged view of a tube end face shown in FIG. [Fig. 6]

FIG. 1 is a sectional view showing a tank to which a tube is assembled according to a specific example of the present invention.

[Fig. 7]

FIG. 4 is a cross-sectional view showing a tank to which a tube is attached according to a specific example of the present invention.

[Fig. 8]

FIG. 2 is a front view showing a schematic configuration of a heat exchanger according to a specific example of the present invention.

[Fig. 9]

FIG. 2 is an exploded perspective view showing a configuration of a tank according to a specific example of the present invention. '[Fig. 10]

FIG. 2 is a cross-sectional view showing a tank according to a specific example of the present invention.

[Fig. 11]

It is a longitudinal section showing a tank concerning a specific example of the present invention.

[Fig. 1 2]

[Fig. 13]

FIG. 2 is a perspective view showing a tube according to a specific example of the present invention.

[Fig. 14]

FIG. 3 is a front view showing a heat exchanger according to a specific example of the present invention.

[Fig. 15]

FIG. 2 is an exploded perspective view showing a main part of a heat exchanger according to a specific example of the present invention.

[Fig. 16]

FIG. 4 is an explanatory view showing a tank and a fin according to a specific example of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing a schematic configuration of the heat exchanger 1. FIG.

The heat exchanger 1 shown in FIG. 1 shows an example of a condenser. Heat exchanger 1 The tubes 21 and the fins 4 are alternately laminated, and both ends of these tubes 21 are inserted into the tube insertion holes 5 of the pair of the nozzles 3 and connected. Inside the tank 3, there is provided a partition plate 7 for dividing the medium flow path constituted by the tank 3 and the tube 21. The opening of the tank 3 is closed by the partition plate 7. The tank 3 has an outlet 31 b for feeding or discharging the medium into the heat exchanger 1. Side plates 8 are provided on both sides of the laminated tubes 21 and fins 4, and mounting members 10 for attaching the heat exchanger 1 to the vehicle body are provided on the side plates 8 at the lower end of the heat exchanger 1. ing.

The heat exchanger 1 is assembled with the above members, and is integrally brazed and joined in the heating furnace by the brazing material provided on the respective members.

FIG. 2 is a perspective view showing the tank 3. FIG. 2 is an exploded perspective view of the evening plate 31, the end plate 32, and the partition plate 7 constituting the tank 3.

The tank 3 is configured as a tubular tank 3 in which the outer surface of an end plate 32 is brought into contact with the inner surface of a U-shaped opening of a tank plate 31 having a U-shaped cross section. The end plate 32 has a tube insertion hole 5 into which the tube 21 is inserted.

The tank plate 31 and the end plate 32 are positioned by a partition plate 7 provided inside the tank 3 to form a tubular tank 3. The tank plate 31 of the present example is provided with a mounting hole 31a for mounting the partition plate 7, and a medium outlet 31b. Further, the partition plate 7 has a convex portion 7a inserted into the mounting hole 31a and a cutout portion 7b into which the end plate 32 is fitted. That is, the projection 7 a of the partition plate 7 is inserted into the mounting hole 31 a of the tank plate 31, and the partition plate 7 is assembled to the tank plate 31. Next, when the end plate 32 is assembled so as to be joined to the inner surface of the U-shaped opening of the tank plate 31, the edge of the end plate 32 fits into the notch 7 b of the partition plate 7, Positioning of tank plate 3 1 and end plate 3 2 The tank 3 can be assembled.

FIG. 3 is a sectional view of the tank 3 to which the tube 21 is assembled.

As shown in FIG. 3, the tank plate 31 has a brazing material R1 provided on a surface outside the tank 3 and a brazing material R2 provided on a surface inside the tank 3. The brazing material R 1 provided on the outer surface of the tank plate 3 1 is a brazing material for joining accessories such as the connector 4 to the tank 3, and the brazing material R 1 is used for joining a partition plate 7 provided inside the tank 3. With brazing filler metal.

Further, the end plate 32 has a brazing material R 3 provided on a surface inside the tank 3. The brazing material R 3 is a brazing material for joining the tube 21 and joining the partition plate 7.

One surface of the end plate 32 that is in contact with the tank plate 31 is formed as a barrier f section 21 for preventing the brazing material from flowing out without the brazing material. This distant 'big success I

21 blocks the flow of the brazing material R2 provided inside the tank plate 311 in the heating furnace.

Normally, in a furnace, the molten brazing material flows along the brazing material clad on the plate. The end plate 32 of this example is provided with an isolation part 3 21 for preventing the outflow of brazing material without brazing material, so that the flow of the brazing material R 2 provided on the inner surface of the tank plate 31 in the heating furnace. Is blocked by the isolation part 321, and does not flow out to the end plate 32 side. Even if the molten brazing material R2 flows beyond the isolation section 321, the amount of the flow is smaller than when the isolation section 321 is not provided.

One surface of the tank plate 31 in contact with the end plate 32 is an isolation portion 311 where no brazing material is provided. The brazing material R 1 provided on the outer surface of the tank plate 31 is prevented from flowing in the heating furnace at the isolation portion 311, and does not flow out to the end plate 32 side.

Therefore, the tube 21 is brazed to the tube inlet hole 5 of the end plate 32 with an appropriate amount of brazing material, and the erosion caused by the excessive amount of brazing material flowing out to the tube 21 side. Can be prevented. FIG. 4 is an end view of the tube 21. As shown in FIG. 4, the tube 21 used in the heat exchanger 1 of the present example is formed by roll forming in which a plate is sequentially bent to form the tube 21. In the figure, 21a is a medium flow path, 21b is a bead, and 21c is a joint.

When formed into a tube by roll forming, the tube 21 can be formed using a thin plate. In the heat exchanger 1 of this example, even if the thickness of the tube 21 is small, since an excessive amount of brazing material does not flow out to the tube side in the heating furnace, a hole may be formed in the tube 21. Erosion can be prevented. Therefore, the weight of the heat exchanger 1 can be reduced, and the safety of the heat exchanger 1 can be improved.

FIG. 5 is a partially enlarged view of the end face of the tube 21. As shown in FIG. 5, the tube 21 is provided with a bead 21 b that bends a plate to partition a medium flow path 21 a inside the tube 21. When the plate is bent to form the bead 21b, a concave groove 21d is formed on the outer surface of the tube 21. In the heating furnace, the brazing material R3 provided on the end plate 32 is melted and drawn into the groove 21d. Therefore, the molten brazing material that has flowed through the tube inlet hole 5 of the tube 21 and the end plate 32 does not accumulate in the gap between the tube 21 and the tube inlet hole 5, but flows out to the concave groove 2 Id, and has an appropriate amount. The tube 21 and the end plate 32 are joined with the brazing material.

FIG. 6 is a sectional view of the tank 3 showing another specific example.

In this example, as shown in FIG. 6, the brazing material R1 is provided on the surface of the tank plate 31 outside the tank 3. In addition, the end plate 32 has a brazing material R 4 provided on the outer surface of the tank 3, and a filter material R 3 provided on the inner surface.

Also in this example, the tank plate 31 is provided with an isolation portion 311 for preventing the brazing material from flowing out on one surface in contact with the end plate 32. The separating portion 3 1 1 prevents the flow of the brazing material R 1 provided on the outer surface of the tank plate 3 1. Therefore, an excessive amount of brazing material does not flow out to the tube inlet 7 of the end blade 31. The present invention is not limited to this example, and it is also possible to provide a brazing material on the partition plate itself and to provide a filter without providing a filter material on the inner surface of the end plate or the tank plate.

FIG. 7 is a sectional view of a tank 30 showing another specific example.

In this example, as shown in FIG. 7, the end plate 33 is joined from the outside of the U-shaped opening of the tank plate 31 having a U-shaped cross section. The tank plate 31 has a brazing material R1 provided on a surface outside the tank 30 and a brazing material R2 provided on a surface inside the tank 30. In addition, the end plate 33 has a brazing material R5 on a surface outside the tank 30.

The tank plate 31 is provided with an isolating portion 3 1 1 where no brazing material is provided on one surface in contact with the end plate 3 3, and the end plate 3 3 has two surfaces in contact with the tank plate 3 1, namely, the tank 3. Both the inside surface of the end plate 0 and the surface of the end edge of the end plate 33 are defined as isolation portions 331 and 332. Therefore, the isolation portions 311, 331, and 332 prevent the flow of the brazing materials Rl and R2 provided on the tank plate 31. Therefore, the isolation portions 311, 331, and 332 prevent an excessive amount of brazing material from flowing out, and the tube 21 and the end plate 31 are brazed and joined with an appropriate amount of brazing material.

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

FIG. 8 is a front view showing a schematic configuration of the heat exchanger 1. FIG. This heat exchanger 1 is a condenser of an air conditioner of an automobile. This heat exchanger 1 has a core 2 in which a plurality of tubes 21 and 21 and fins 4 and 4 are alternately laminated, and both ends of the plurality of tubes 21 and 21 are inserted, respectively. It is composed of evening drinks 3, 3 in pairs. Inside the tanks 3,3, partition plates 7,7 for partitioning the inside of the tanks 3,3 are provided. The upper and lower openings of the tanks 3, 3 are closed by closing members 6, 6, and a pair of side plates 8, 8 are provided above and below the core 2 for reinforcement. In 3, 3, an inlet joint 41 and an outlet joint 42 for introducing and discharging the medium are provided.

It should be noted that the tanks 3 and 7 are provided by the partition plates 7 and 7 without using the blocking members 6 and 6. The upper and lower openings 3 may be closed.

These components of the heat exchanger 1 are each made of an aluminum alloy, and are joined together by brazing in a furnace in an assembled state. FIG. 9 is a perspective view of the tank 3 with a quarter angle. Tank 3 is a two-part tank consisting of tank plate 31 and end plate 32.

"3 o

The outer periphery of the end plate 32 abuts on the inner surface of the U-shaped opening of the tank plate 31 having a U-shaped cross section to form a tank 3. Tube insertion holes 5, 5 for inserting tubes are formed in the end plate 32.

The tank plate 31 and the end plate 32 are positioned by a partition plate 7 provided inside the tank 3, and the tank plate 31 and the end plate 32 are mounted at predetermined positions.

The tank plate 31 of this example is provided with a mounting hole 31 a for mounting the partition plate 7 and an outflow / inlet 31 b connecting the inlet joint 41 or the outlet joint 42. Further, the partition plate 7 includes a convex portion 7a inserted into the mounting hole 3la and cutout portions 7b, 7b fitted to the end plate 32.

When assembling the tank 3, first, insert the projection 7 a of the partition plate 7 into the mounting hole 31 a of the tank plate 31, and assemble the partition plate 7 to the dinner plate 31. Next, when the end plate 32 is assembled so as to be joined to the inner surface of the U-shaped opening of the tank plate 31, the end edge of the end plate 32 fits into the notch 7b of the partition plate 7. Then, the tank plate 31 and the end plate 32 are positioned and the tank 3 can be assembled.

FIG. 10 is a cross-sectional view of the tank 3 to which the tube 21 is assembled. As shown in FIG. 10, the tank plate 31 has a brazing material R1 provided on a surface outside the tank 3 and a brazing material R2 provided on a surface inside the tank 3. The brazing material R 1 provided on the outer surface of the tank plate 31 The brazing filler metal R 2 is used to join accessories such as the inlet joint 4 1 and the outlet joint 4 2 to the tank 3. The brazing filler metal R 2 joins the partition plate 7 provided inside the tank 3 and the tank plate 3 1. It is a brazing material for joining the end plate 32 with the end plate 32.

Further, the end plate 32 has a brazing material R 3 provided on a surface inside the tank 3. The brazing material R 3 is a brazing material for joining the tube 21 to the tube insertion hole 5 and joining the partition plate 7. FIG. 11 is a partial longitudinal sectional view of the tank.

As shown in FIG. 11, brazing materials R 1 and R 2 are clad on the outer surface and inner surface of the tank plate 31, respectively, and the partition plate 7 is made of a base material on which the filtering material is not clad. .

As described above, according to this specific example, since the brazing material is not clad in the partition plate 7, the brazing materials R2 and R3 melted during brazing flow out along the non-wetting partition plate 7. Few things. As a result, there is no shortage of brazing material for brazing the partition plate, and even if there is some gap between the inner surfaces of the dinner plate 31 and the end plate 32 and the partition plate 7, the partition plate 7 can be removed. Can be brazed well.

Therefore, even if the dimensional control of the partition plate 7 is not strictly performed as in the past, there is no leakage of the medium between the inner surface of the tank 3 and the partition plate 7, and a highly airtight heat exchanger is provided. can do.

FIG. 12 is a cross-sectional view of a tank 3 showing another specific example.

In this specific example, as shown in FIG. 12, the brazing material R1 is provided on the surface of the tank plate 31 outside the tank 3. The brazing filler metal R 1 is a brazing filler metal for joining accessories such as the inlet joint 41 and the outlet joint 42 to the tank 3.

The end plate 32 has a brazing material R 3 provided on a surface inside the tank 3, and a brazing material R 4 provided on a surface outside the tank 3. The brazing material R 3 provided on the inner surface of the end plate 32 is inserted into the tube insertion hole 1 and joining the partition plate 7 provided inside the tank 3. The brazing material R 4 joins the tube 21 to the tube insertion hole 5 and the tank plate 3. Brazing material for joining endplate 3 and 2

As described above, even when the brazing material R 3 is clad only on the end plate 32 side on the inner surface of the tank 3 and the brazing material is not clad on the tank plate 31 side, the molten brazing material R 3 Can enter into the gap between the inner surface of the tank plate 31 and the side surface of the partition plate 7 by capillary action, so that the partition plate 7 can be brazed without any gap. FIG. 13 is a perspective view of a tube 21 showing another specific example.

The tube 21 of this specific example is a so-called mouth forming tube formed by mouth-forming a plate material, in which a plurality of flow paths 21 a and 2 la through which a medium flows are provided. ing.

The above-mentioned tube 21 is formed by folding a plate material into a pleated shape to form a plurality of beads 21b, 2lb, and then joining them so that the beads 21b, 21b are inside. A partition is formed by abutting the beads 21b and 21b. A groove 21 d is formed on the surface of the tube 21 by the beads 2 lb and 21 b and the joint 21 c.

For this reason, in the heat exchanger 1 using the tube 21, the molten brazing material on the inner surface of the tank 3 is sucked into the concave grooves 21 d and 21 d by capillary action during brazing, and the tube 21 Because of this, the brazing material for brazing the partition plate 7 was insufficient, and the brazing failure of the partition plate 7 was likely to occur.

However, by using the partition plate 7 as a base material, even if the brazing material on the inner surface of the tank 3 flows out to the tube 21 side, it does not flow out along the partition plate 7 as in the conventional case. The amount of outflow is greatly reduced, and there is no shortage of brazing material for brazing the partition plate 7, so that the partition plate 7 can be brazed well.

In the above specific example, a capacitor was explained as an example. Without being limited to the above, the object of the present invention can be achieved also in an evaporator core and the like.

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

The heat exchanger 1 of this example is a radiator of a refrigeration cycle for in-vehicle air conditioning mounted on an automobile, and includes a plurality of tubes 21 through which a medium (that is, a refrigerant) flows, as shown in FIGS. And a pair of tanks 3 to which both ends of a tube 21 are connected, respectively, and the medium and air flowing through the core 2 by heat transmitted to the core 2 It is configured to perform heat exchange between and.

Side plates 8 as reinforcing members are provided on the upper and lower sides of the core 2, respectively. The end of each side plate 8 is supported by the tank 3. Further, the tank 3 is provided with an inlet for inflow of the medium, a joint 41, and an outlet joint 42 for outflow of the medium, and the medium flows from the inlet joint 41 into the inside of the tank 3, and After flowing through the tube 21 while performing heat exchange, it is discharged from the outlet joint 42 to the outside of the tank 3.

Each tank 3 has a substantially cylindrical shape whose both ends are closed by closing members 6 and the inside of which is partitioned at predetermined intervals by a partition plate 7, and a medium is provided between the tanks 3. It is configured to reciprocate multiple times. The tube 21 has a flat shape formed by extrusion or roll forming of a plate. The interior is divided into multiple sections to obtain the required pressure resistance performance.

The fins 4 of this example are made of a cladding material in which an appropriate amount of brazing material necessary for brazing to a tube is clad on the front and back, and this is formed by corrugating the mouth. The wave pitch is 1.6 mn! It is about 3.0 mm. In addition, a number of levers (not shown) are provided at key points of the fins 4.

Further, each of the tanks 3 in this example is configured by attaching an end plate 32 to a tank plate 31. The tank plate 31 and the end plate 32 are formed by cutting and pressing a plate having the required thickness, respectively. Have been created.

The tank plate 31 is a semi-cylindrical member, and the end plate 32 is a member provided with a plurality of tube insertion holes 5 into which the ends of the tubes 21 are inserted and connected. The tube insertion holes 5 are arranged at regular intervals in the longitudinal direction of the tank 3.

The end plate 32 is inserted between both edges of the evening plate 31 and attached to the tank plate 31. The insertion amount of the end plate 32 is regulated by the partition plate 7.

At both edges of the tank plate 31, a plurality of bent pieces 31 c for holding the end plate 32 and a plurality of walls 3 Id protruding toward the core 2 are provided. The bent pieces 31c and the wall parts 31d are alternately arranged at regular intervals in the longitudinal direction of the tank 3.

After the end plate 32 is positioned on the tank plate 31, the end plate 32 is fixed by bending the bent piece 31 c. The bending of the bent piece 3 1 c is performed by using a force-squeezing jig or the like.

These tubes 21, fins 4, sunset plates 31, end plates 32, inlet joints 41, outlet joints 42, side plates 8, closing members 6, and partitions that constitute the heat exchanger 1 The plate 7 is a member formed by molding an aluminum or aluminum alloy, and is assembled using a jig. The assembled body is heat-treated in a furnace and brazed together. The brazing material and flux required for brazing are provided at key points in each member prior to heat treatment.

As shown in FIG. 16, in the case of this example, the brazing material F is clad on both sides of the tank plate 31. In addition, the end plate 32 is clad with brazing material F only on one side, and at the time of brazing, the end of the fin 4 faces the surface of the end plate 32 where the brazing material is not clad. It has a configuration.

The brazing material F clad on the tank plate 31 and the end plate 32 brazes the tank plate 31 and the end plate 32 together. At the same time, the tube 21, the inlet joint 41, the outlet joint 42, the closing member 6, and the partition plate 7 are brazed.

According to the end of the fin 4 and the surface of the end plate 32 where the brazing material is not clad, the brazing material F clad on the tank plate 31 and the end plate 32 is formed. Even if it melts, the brazing material F does not go around the end of the fin 4 and unnecessary erosion at the end of the fin 4 can be avoided.

Therefore, with such a configuration, the gap between the fin 4 and the tank 3 can be made as small as possible, and the heat exchange performance of the core 2 can be improved.

In particular, in this example, the length of the fins 4 is set to be slightly smaller than the interval between each of the fins 3, and the distance between the end of the fins 4 and the surface of the end plate 32 where the brazing material is not clad is set. The shortest distance G is set to be equal to or less than 2.0 mm for the ends of all the fins 32 in the entire heat exchanger 1.

However, in this case, some of the ends of the fins 4 may come into contact with the surface of the end plate 32 where the brazing material is not clad. In addition, according to a small dimensional error, the shortest distance G may be 2.0 mm or more at some of the ends of the fin 4.

Note that the shortest distance G is the distance of the place where the gap is the narrowest. In other words, the cross-sectional shape of the end plate 32 of this example is bulging toward the core 2 side, and the shortest distance G is between the center of the end of the fin 4 and the bulging top of the tank plate 32. Distance.

According to such a configuration, air leakage due to the gap between the fin 4 and the tank 3 can be eliminated, and the heat exchange performance of the core can be sufficiently ensured.

The shortest distance G between the end of the fin 4 and the surface of the end plate 32 where the brazing material is not clad is set at 2.0 mm or less in this example, but is more preferable in terms of eliminating air leakage. Is less than or equal to 1. O mm. Alternatively, for this example, the length of the fins 4 is slightly larger than the distance between the tanks 3 and the fins 4 are slightly compressed and assembled, so that The ends of the fins 32 may be configured to abut against the surface of the end plate 32 where the brazing material is not clad.

According to such a configuration, air leakage due to the gap between the fin 4 and the tank 3 can be more reliably eliminated.

As described above, the heat exchanger of this example effectively avoids the erosion of the fin ends due to the brazing material, and can be suitably used as a radiator of a refrigeration cycle. The configuration of this embodiment, like Ebapore evening and automotive Lage Isseki, susceptible of _c industry can also be applied to other heat exchangers

INDUSTRIAL APPLICABILITY The present invention is a heat exchanger generally used for a refrigeration cycle of an automobile, a home air conditioner, and the like, and is particularly suitable for use in Laje night, condenser, evaporator, and the like.

Claims

The scope of the claims

1. A tank comprising a tube through which a medium is circulated, an end plate having a tube insertion hole for connecting the tube, and a tank plate connected to the end plate. In a heat exchanger that is made by brazing each member,

The evening plate is formed by using a plate provided with a brazing material, and at least one of the tank plate and the end plate is provided with an isolation portion for preventing a brazing material from flowing out without the brazing material. Heat exchanger.

2. The heat exchanger according to claim 1, wherein the end plate has the isolation portion provided on one surface in contact with the tank plate.

3. The tank plate is provided with a brazing material at least on the inner side of the tank.

3. The heat exchanger according to claim 2, wherein the end plate is provided with a brazing material on a surface inside the tank.

4. The tank plate according to any one of claims 1 to 3, wherein the isolation portion is provided on one surface in contact with the end plate.

5. The tank is provided with a partition plate inside the tank,

The heat exchanger according to any one of claims 1 to 4, wherein the tank is positioned by the partition plate, and is assembled with the tank plate and the end plate.

6. The heat exchanger according to any one of claims 1 to 5, wherein the heat exchanger uses a tube formed by molding a plate.

7. The heat exchanger according to any one of claims 1 to 6, wherein the tube has a concave groove on an outer surface of the tube in contact with a tube insertion hole of the end plate.

8. A tube through which the medium flows and a tank to which the end of the tube is connected In a heat exchanger with

The tank is formed by brazing an end plate provided with a hole for connecting an end of the tube, a tank plate connected to the end plate, and a partition plate for defining the inside,

A heat exchanger, wherein a brazing material is clad on at least one of the inner surfaces of the tank plate and the end plate, and the partition plate is made of a base material with no brazing material.

9. The heat exchanger according to claim 8, wherein the tube has a groove-shaped concave groove on a surface.

10. The heat exchanger according to claim 9, wherein the tube is formed by molding a plate material.

11. A heat exchanger comprising: a core formed by laminating a tube and a fin; and a tank connected to an end of the tube, wherein a medium flowing through the tube exchanges heat by heat transmitted to the core. ,

The tank includes an end plate provided with a hole for connecting the tube, and a tank plate to which the end plate is attached.

The heat exchanger includes the tube, the fins, the end plate, and the sunset plate, and brazing them in a furnace.The end plate is clad with brazing material only on one side,

At the time of the brazing, an end portion of the fin faces a surface of the end plate on which the filter material is not clad.

12. The heat exchanger according to claim 11, wherein a shortest distance between an end of the fin and a surface of the end plate on which the brazing material is not clad is 2.0 mm or less. .

13. The heat exchanger according to claim 11, wherein an end of the fin is in contact with a surface of the end plate where the brazing material is not clad. 13.