WO1998009124A1

WO1998009124A1 - Heat exchanger

Info

Publication number: WO1998009124A1
Application number: PCT/JP1997/003010
Authority: WO
Inventors: Kunihiko Nishishita
Original assignee: Zexel Corporation
Priority date: 1996-08-29
Filing date: 1997-08-28
Publication date: 1998-03-05
Also published as: CN1199458A; EP0859209A1; EP0859209A4

Abstract

A heat exchanger (1) including a pair of tanks (2 and 2), and a plurality of tubes (4, 4) and fins (3a, 3a) interposed between these tanks (2 and 2), wherein the tubes (4) have closing portions (5) at intermediate parts thereof to divide passages (6, 7) into two parts. One (6) of the passages connected to one (2) of the tanks and the other passage (7) connected to the other tank (2) are shaped into a U-turn shape, and a first heat exchanger A having a partial tank structure and a second heat exchanger B having a partial structural tank structure are formed, respectively. A heat insulating zone (11) not having fins is disposed between the first and second heat exchangers. The first and second heat exchangers are integrally brazed to form a heat exchanger. In this heat exchanger formed by integrally brazing the first and second exchangers, each of the tubes (4, 4) is produced by bending a single plate of an aluminum material or an aluminum alloy cladded on both surfaces or bonding two plates, and the closing portion (5) for dividing the passage into two parts in the longitudinal direction is formed in this tube.

Description

Akitoda

Heat exchanger technical field

The present invention combines two heat exchangers having different applications in the horizontal or vertical direction, or in the upstream and downstream sides in the ventilation direction to form a single unit. It relates to the formed heat exchanger. Background art

Generally, a parallel flow type heat exchanger and a single tank type heat exchanger known as heat exchangers for automobiles or home appliances include a plurality of heat exchangers. Tubes and fins are alternately laminated, and both ends of these laminated tubes are inserted and joined into insertion holes provided in tanks installed vertically or horizontally. In addition, a partition plate for partitioning the tank in the longitudinal direction is provided at required locations of these tanks, and the tank is divided in the longitudinal direction, and an inlet joint and an outlet joint provided in the tank are provided. In this structure, the heat exchange medium is meandered several times and flows therethrough. That is, the heat exchange medium supplied to the inlet joint of the heat exchanger flows between the tanks through a tube while meandering several times, and exchanges heat with the outside when passing through the tube, It has a structure to be discharged from the outlet joint.

In addition, the single-tank type heat exchanger is formed by connecting a tube having a return-shaped passage to one tank.

Meanwhile, conventionally, a heat exchanger formed by combining two heat exchangers having different purposes in a horizontal or vertical direction is known. You. Examples of this type of heat exchanger include, for example, Japanese Utility Model Publication No. 59-16692, Japanese Utility Model Application Publication No. 61-115,62, and Japanese Utility Model Application No. 2-637072. As disclosed in the official gazette, a tube and a fin are arranged between a pair of tanks, and a partition plate is mounted in the middle of the pair of tanks. Nevertheless, it has been proposed to provide a substantially individual heat exchanger.

In addition, as described in Japanese Utility Model Publication No. 6-4 515 7, a third tank having two tank sections is disposed between the left and right tanks, and the left and right tanks are arranged. It has been proposed that tubes and fins are arranged between the tank and each tank section of the third tank, and the left and right sides are provided with substantially separate heat exchangers.

Further, as described in Japanese Utility Model Application Laid-Open No. 2-54076, a plate-like plate fin is laminated, and a plurality of tubes are connected to the plate fin to communicate with each other. One end of the tube is connected to an end plate constituting a tank, and a tank plate is assembled to the end plate to constitute a heat exchanger. A heat exchanger in which the first heat exchanger and the second heat exchanger are formed in the body by separately providing the tank and the tank plate or separately providing the tank plate is proposed. Have been.

If the two heat exchangers having different functions described above are integrally formed, the number of parts can be reduced, the work process can be reduced, and the cost can be reduced. Also, there is an advantage that the heat exchange space can be reduced if heat exchangers having different functions are integrally formed.

However, conventional heat exchangers formed by combining a plurality of heat exchangers are described in Japanese Utility Model Publication No. 59-16692 and Japanese Utility Model Publication No. 2-366772. Like a heat exchanger, a partition plate is installed in the middle of the pair of tanks, and this partition The rate separates the two heat exchange zones. Therefore, since the tank is of a body, heat is easily transferred, and heat is transferred via a partition plate mounted on the tank.

In this regard, the heat exchanger described in Japanese Utility Model Publication No. 6-45157 is provided with a hollow portion between the two tank portions of the third tank provided at the center. To prevent heat transfer. However, since the third tank is arranged between the left and right tanks, there is a disadvantage that the heat exchange space for arranging the tubes is reduced correspondingly and the heat exchange efficiency is deteriorated.

In addition, individual heat exchangers with different functions are formed in the body-heat exchangers have different heat exchange temperatures and heat release rates depending on the function of each heat exchanger. For example, comparing a condenser with a condenser under a certain condition, the condenser exchanges heat with higher heat. Therefore, in a heat exchanger in which a radiator and a capacitor are integrally formed, heat is transferred to the capacitor because the heat exchange temperature of the radiator is higher, and heat dissipation of the capacitor is hindered. There is a problem that the heat exchange rate of the capacitor decreases.

As described above, when a heat exchanger having a plurality of functions is integrally formed, the optimum temperature of each heat exchanger is different, and each heat exchanger is formed via an integrally formed fin, tube, tank, or the like. There is a disadvantage that the heat is transferred between the heat exchangers and the heat exchangers formed integrally cannot exchange heat at the optimum temperature.

An object of the present invention is to provide a heat exchanger in which individual heat exchangers having different applications are integrally formed, and in which heat transfer between the heat exchangers is prevented. In addition, the heat exchanger in which the two heat exchangers are integrally formed differs in the required performance such as the pressure applied to the tube itself and the required corrosion resistance of the tube depending on the function of each heat exchanger. example For example, if the first heat exchanger is a radiator and the second heat exchanger is a condenser, and the first and second heat exchangers are heat exchangers integrally formed, the radiator High corrosion resistance is required on the inner and outer surfaces of the tube. On the other hand, capacitors are required to have high pressure resistance because they condense a high-temperature, high-pressure heat exchange medium.In addition, since the inner surface of the capacitor tube is in contact with the flowing heat exchange medium, corrosion Although it does not occur, the outer surface of the tube is exposed to high temperature and humidity, so high corrosion resistance is required.

Conventionally, generally used tubes include, for example, an extrusion molding method using an improved material in which Cu is added to JISA150 or A110 (99.0 wt% A1). A tube formed by such a method is known. In addition, as fins, JISA 4343 or JISA 405 (A1-Si type) was added a material that would be an improved material with Zn added to the surface, It is known to use A 3 0 3 (Al—Mn system) with Zn addition.

When these tubes and fins are used in the first and second heat exchangers (radiators and condensers), the tubes have good pressure resistance due to the characteristics of the extruded material, In the combination of tubes, the tube surface potential is noble, and the fins are used as sacrificial anodes, so that the fins can be preferentially corroded to prevent corrosion of the tubes. Since the outer surface has good corrosion resistance, the required performance of the capacitor as the second heat exchanger can be satisfied. However, the tube has a problem in that the corrosion resistance of the inner surface of the tube is poor, and the required performance of the radiator as the first heat exchanger cannot be satisfied.

In addition, it is necessary to form a fin using a brazed sheet that is brazed with brazing material in order to braze the tube and fin together. When the fin material is used, the mold used for forming the fins becomes severely worn, and the In addition, there is a problem that the cost of production increases, and the cost of material increases, resulting in an inconvenience of soaring the production cost.

To solve this problem, it is conceivable to separately form tubes that satisfy the required performance of each heat exchanger. For example, the tube of the first heat exchanger has JISA303 (A1-Mn system) as a core material, and JISA4343 or JISA4045 etc. is formed on the outer layer of the tube. (A1-Si series) is clad in a brazing material, and the inner layer of the tube is made of a three-layer material with JIS Λ702 (A1-Zn) clad. An electric resistance welded tube is formed, while the tube of the second heat exchanger is connected to J1SA1500 or A1100 (99.0 wt% Al) as in the previous example. It is formed by extrusion using the added modifier. The tube of the first heat exchanger has the potential of the core material noble due to the potential difference between JISA3003, which is the core material of the tube, and JISA7072 (A) -Zn). The sacrificial anode effect of JISA 707 2 improves the corrosion resistance of the inner surface of the tube, and the outer surface of the tube improves the corrosion resistance by the sacrificial anti-corrosion effect of the fin, so that the first heat The required performance of the exchanger can be satisfied.

However, in this case, since the tubes of the first and second heat exchangers need to be separately provided, the number of parts increases, and there arises a problem that the assembling and working processes become difficult. Also, in this case, the fins need to use finned materials in which the filler metal is clad, and as described above, maintenance costs and material costs have increased. The problem has not been solved.

It is also conceivable to use a material in which the filler material is not coated with the fin and a material in which the filler material is clad in the tube. That is, for example, considering the corrosion resistance of the first heat exchanger, JISA303 (A1-Mn-based) material is used as the core material, and JISA4303 or JISA4045 (A 1 — S i series) It is conceivable that a tube is formed using a material in which the wax is clad. In this case, the workability of the tube by extrusion molding is impossible due to poor extrusion workability. Therefore, it is required to form an electric resistance welded tube. However, the ERW tube has a problem that the pressure resistance required by the second heat exchanger (for example, a capacitor) cannot be satisfied.

The present invention provides a heat exchanger in which the first and second heat exchangers are integrally formed, by integrally forming tubes that can satisfy the required performance of each heat exchanger. Another object of the present invention is to obtain a heat exchanger capable of reducing manufacturing costs. Disclosure of the invention

According to a first aspect of the present invention, there is provided a heat exchanger including a pair of tanks, and a plurality of tubes and fins provided between the tanks. At the same time, one of the passages connected to one of the tanks and the other of the passages connected to the other of the tanks are formed in a u-turn shape, and the one of the one tank and the one of the tubes is formed. A first heat exchanger having a one-tank structure is formed by the u-turn shaped passage of the present invention, and a second heat exchange having a one-tank structure is formed by the other tank and the other U-turn shaped passage of the tube. This is a heat exchanger in which a heat exchanger is formed.

With this configuration, the overall shape of the heat exchanger is a heat exchanger including a pair of tanks and a plurality of tubes and fins provided between the tanks. In spite of the fact that it is formed by combining heat exchangers with a single tank structure, a plurality of tubes and fins are alternately stacked and mounted between a pair of tanks. Is integrated between a pair of tanks, and the pair of tanks is used to form both ends of the tube and the fin. Since the heat exchanger is supported, the rigidity of the heat exchanger can be increased. In other words, even if it has a single tank structure, it has the advantage of a parallel flow type.

Since the first and second heat exchangers each have a single-tank structure, the advantage inherent in a single tank is that the tank is half that of a normal-flow type heat exchanger. In addition, there is an advantage that a heat exchange space can be taken up to improve heat exchange efficiency, and that the number of parts can be reduced and cost can be reduced.

Further, the first and second heat exchangers are structurally connected to each other, so that the rigidity is improved as described above, while the heat exchangers are adjacent to each other, so that the performance is deteriorated. Regarding the possibility that the heat is exchanged, the blockage is provided in the middle of the tube, so that not only the exchange of the heat exchange medium is blocked, but also the blockage of both sides. Heat can be reduced as much as possible to prevent performance degradation.

Further, in the present invention, in the first invention, the tube is

The heat exchanger is formed by combining two plates or by folding one plate in half.

That is, the invention of the present application is to form a tube by combining two press-formed or roll-formed plates, or to form a tube by further folding a single pressed or roll-formed plate into half. This method is applied to a device that forms a tube by folding a single plate in half while forming it in a roll. Furthermore, the invention of the present application is the heat exchanger according to the first invention, wherein the tubes are integrally formed with a tank portion that is laminated to form a tank.

The heat exchanger having this configuration is of a so-called laminate type in which a tank is integrally formed with a tube. It can also be applied to the native type.

Further, the invention of the present application is the heat exchanger according to the first aspect, wherein the closing portion of the tube includes a heat insulating hole.

The closing portion connects the passages of both the first and second heat exchangers so that the tube can be integrally formed, and minimizes the heat transfer of both tubes. By providing a hole in the closing portion, the heat insulating effect can be further improved.

Furthermore, the invention of the present application is the heat exchanger according to the first invention, wherein the closing portion of the tube includes a heat insulating cavity.

Thus, as in the case described above, the heat insulating effect can be further improved by this cavity.

Further, in the present invention, in the first invention, the closed portion of the tube includes a folded portion, and further, separate fins are arranged for the first heat exchanger and the second heat exchanger. A heat exchanger having a configuration in which an end of the fin is positioned at the folded portion of the closing portion.

Since the separate fins are arranged for the second heat exchanger and the second heat exchanger, the fins having the performance suitable for each heat exchanger can be individually prepared. The performance required for each heat exchanger can be satisfied, and the closed part has a folded part, so that the end of each fin is positioned at the folded part, and as a result, The installation of the fin is properly maintained, for example, the protrusion of the fin end is prevented.

Further, the invention of the present application is the invention according to the first invention, wherein one fin is arranged over each of the first heat exchanger and the second heat exchanger. Heat exchanger and second heat exchanger This is a heat exchanger with a different number of fins.

When one fin is arranged over the first heat exchanger and the second heat exchanger in this way, it is economical because only one type of fin is required. In addition, by making the number of fins different between the first heat exchanger and the second heat exchanger (changing the fin pitch), it is possible to meet the required performance of each heat exchanger. Can be.

Further, the invention of the present application is the heat exchanger according to the first invention, wherein the tube and the fin are integrally assembled and brazed in a furnace.

As described above, basically, the tube and the fin are integrated and brazed in the furnace. In addition to the brazing of the tube and the fin, the tank and the tank described later are used. Any one of the tank part that forms the tank and the end plate that forms the tank will be attached at the same time.

Further, the invention of the present application is the heat exchanger according to the i-th invention, wherein the tube, the fin, and the tank are integrally assembled and brazed in a furnace.

In this case, the tank should be a cylindrical one or a two-part tank, combined together, and fastened together with the tubes and fins.

Further, the invention of the present application is the heat exchanger according to the first invention, wherein the tube, the fin, and the tank portion that is laminated to form a tank are integrally assembled and brazed in a furnace.

In this case, the above-mentioned laminated type in which the tank is integrally formed with the tube is integrally brazed.

Further, according to the first aspect of the present invention, in the first aspect, the tube, the fin, and the end plate are integrally assembled, and the furnace plate is attached thereto, and a tank plate is joined to the end plate. Heat exchanger. In this case, the tank is formed by the end plate and the tank plate, and after the tube, fin and end plate are brazed, the tank plate is assembled, and the seal is assembled. It is bonded by caulking using a material.

Further, the invention of the present application is the heat exchanger according to the first invention, wherein a side plate is provided between the pair of tanks. In this case, the presence of the side plate causes heat exchange. The strength of the vessel is improved. The side plates should be brazed at the same time. Further, the second invention of the present application is directed to a heat exchanger in which tubes and fins are alternately laminated, and an end of the tube is inserted and connected to a tank, and a heat exchanger formed by laminating the tubes and fins is provided. The heat exchanger body is divided into a first heat exchanger and a second heat exchanger, and a fin-free heat insulation area is provided between the first and second heat exchangers. The configuration of the heat exchanger.

In this way, when a heat-insulating area without fins is provided between the divided first and second heat exchangers, the heat transfer between adjacent heat exchangers is Insulation can be performed in the service area, and an integrated heat exchanger in which the performance of each heat exchanger is prevented from deteriorating can be obtained. In addition, by integrally forming the first and second heat exchangers having two different applications, the heat exchange space can be expanded and the heat exchange rate can be improved, and the number of parts can be increased. Is reduced, and costs can be reduced.

Further, in the present invention according to the second invention, the first and second heat exchangers are vertically or horizontally adjacent to each other, and the first and second heat exchangers that are in contact with the heat insulating area are joined to each other. This is a heat exchanger with a plate. In this way, when the joint plate that joins the first and second heat exchangers adjacent to the heat insulation area is provided, the heat insulation area is reinforced, and the heat exchanger as a whole is extended. Is reinforced. In other words, if the heat insulating area is formed, the pressure resistance and the like of the heat insulating area are reduced, which may cause inconvenience such as deformation of the heat exchanger during production. Therefore, by providing a joining plate in the heat insulating area formed between the heat exchangers, the heat exchanger can be reinforced and the above problem can be solved. The joining plate may be provided by brazing the tube and the fin together with the joining plate in a furnace.

Further, the invention of the present application is the heat exchanger according to the second invention, wherein the tank is provided with a partition to separate the first and second heat exchangers.

With this configuration, in the first and second heat exchangers having a common tank, a partition is provided between the first and second heat exchangers to block heat transfer between the heat exchangers. As a result, it is possible to obtain an integrated heat exchanger in which the performance of each heat exchanger is prevented from deteriorating.

Further, according to the second aspect of the present invention, in the second aspect, the partition is formed by at least two partition plates, and a hollow portion is formed inside the tank by the two partition plates. It is a heat exchanger of a configuration to be performed.

With such a configuration, heat conduction between the first heat exchanger and the second heat exchanger can be prevented by the heat insulating effect of the cavity formed in the tank.

Furthermore, the invention of the present application is the heat exchanger according to the second invention, wherein the cavity has a communication hole communicating with the outside.

With this configuration, the outside air flows through the cavity, and the heat insulating effect of the cavity is improved. In addition, due to the presence of the communication hole, the bypass due to poor connection between the two partition plates If there is a leak, it can be easily found at the time of airtight inspection, and defective products can be found early. In addition, since the communication hole is formed, external air may enter the cavity, and water may accumulate in the cavity due to environmental changes such as changes in atmospheric pressure and temperature. In this regard, the communication hole is formed in a portion below the tank. Thereby, the water in the cavity can be easily discharged to the outside, and the corrosion of the tank due to the water can be prevented.

Further, according to the present invention, in the second invention, the first and second heat exchangers are provided between a pair of tanks. In addition, the-path connected to one tank and the other path connected to the other tank are each formed in a u-turn shape, and the one tank and the one of the tubes are formed. The first heat exchanger having a one-tank structure is formed by the u-turn-shaped passage of the present invention, and the second heat exchange having a one-tank structure is formed by the other tank and the other U-turn-shaped passage of the tube. A heat exchanger, wherein the heat insulating area is formed in the closed portion that divides the tube.

¾F.

With this configuration, when the heat exchanger having a single tank structure is integrally formed, the heat transfer generated between both heat exchangers of the heat exchanger is minimized by the closed portion. As the size of the heat exchanger is reduced, it can be blocked in the heat insulation area, so that the performance of each heat exchanger can be prevented from deteriorating. In addition, by forming the single-tank type first and second heat exchangers integrally, the heat exchange space is expanded and the heat exchange rate is improved, and the number of parts is reduced to reduce costs. This has the advantage that it can be achieved.

Further, the invention of the present application is the second invention, wherein the first and second heat exchangers each have a one-tank structure and are adjacent to each other in the left-right or up-down direction, and the tube is a tank section forming a tank. To This is a heat exchanger that is integrally molded.

The heat exchanger having this configuration is of a so-called laminate type in which a tank is integrally formed with a tube, and the present invention can also be applied to this laminate type.

Thus, according to the configuration of the second invention of the present application, in a heat exchanger in which a plurality of heat exchangers for substantially different uses are integrally formed, no fin is interposed between the heat exchangers. By forming an adiabatic zone and preventing heat transfer between the heat exchangers, a heat exchanger with an improved heat exchange rate can be obtained. Further, the third invention of the present application is arranged such that a tube constituting the first heat exchanger and a tube constituting the second heat exchanger are disposed downstream and upstream in the airflow direction, and a space between the two tubes. The first and second heat exchangers are formed by inserting and connecting the ends of the tubes to the respective tanks to form the first and second heat exchangers. In a heat exchanger that is integrally brazed, the tube is formed by bending a single plate made of an aluminum material or an aluminum alloy that is clad on both sides, or joining two plates. In addition, the tube is formed with a closed portion that bisects the passage along the longitudinal direction, one passage forms the first heat exchanger, and the other passage forms the first heat exchanger. Two heat exchangers, and the fins disposed between the tubes are: A heat exchanger structure is a non-click la head material consisting Rumi material or aluminum alloy.

In this way, if the tubes of the first and second heat exchangers are formed using a double-sided clad aluminum material or aluminum alloy, the double-sided clad material and the core material are used. This potential difference makes the potential of the core material noble, and the corrosion resistance of the outer and inner surfaces of the tube can be improved by the sacrificial anode effect of the brazing material.

For this reason, for example, the first heat exchanger is In the second heat exchanger, the corrosion resistance of the inner surface of the tube is not so required, but the corrosion resistance and pressure resistance of the outer surface of the tube are required. When heat exchangers having different purposes are integrally formed, tubes satisfying different required performances can be integrally formed for each heat exchanger. In addition, since the tube has a blockage, the heat transfer of both heat exchangers can be minimized by the blockage, and the heat transfer between the heat exchangers can be reduced. Prevention, and the heat exchange rate can be improved.

In addition, since the brazing material is clad in the tube, the fin can be made of aluminum or aluminum alloy in which the brazing material is not clad. In addition, the mold abrasion that occurred when the fins were formed from the clad material using the clad material was reduced, and maintenance costs could be reduced. Since the cost can be reduced, the manufacturing cost can be reduced.

Further, in the third aspect of the present invention, in the third aspect, the tube material forming the tube has an aluminum material or an aluminum alloy as a core material, and a layer serving as an inner surface of the tube and a layer serving as an outer surface of the tube have A 1 S The core material is a three-layer material in which the i-type brazing material is clad, or an aluminum material or an aluminum alloy, and an aluminum material or an aluminum alloy having a lower potential than the core material. Is a four-layered material in which A 1 —Si-based filler material is clad on the inner layer and the outer layer of the tube as well as the intermediate layer. It is a heat exchanger.

As described above, when a tube is formed by using a four-layer material having an intermediate layer having a potential lower than the potential of the core material between the core material and the brazing material, the surface of the intermediate layer is sacrificed with uniform sacrificial protection. Thereby, the pitting corrosion resistance of the inner surface of the tube is improved.

In addition, aluminum or aluminum, which is a three-layer or four-layer material of a double-sided clad, When a tube is formed using an aluminum alloy, the strength of the tube, such as pressure resistance, is improved.

Further, in the present invention according to the third invention, the tube is formed with a plurality of protrusions projecting inward in one or both passages, and tips of the protrusions are brought into contact with each other. Or a heat exchanger having a configuration in which the tip of the projection and the flat portion are joined.

In this way, a protrusion is formed on one or both of the passages of the tube, and the distal ends of the protrusions are in contact with each other, or the front end of the protrusion is in contact with the plate plane, and the inside of the passage is formed. By dividing the heat exchanger into a plurality of tubes, a turbulent flow is generated in the heat exchange medium flowing in the passage, thereby improving the heat exchange rate, and improving the pressure resistance of the tube. Therefore, the required performance of each heat exchanger can be satisfied by arbitrarily forming a projection on one or both of the passages. In this case, since the aluminum material or the aluminum alloy of the double-sided clad is used, the abutment of the projection is facilitated, and the projection can be arbitrarily formed.

Further, according to the present invention, in the third invention, the tube is formed by folding a single plate, and ends of plates constituting the tube are connected to each other by a tube tube. This is a heat exchanger configured to be superimposed on a metal part, a flat part, an end part or a passage part.

Conventionally, when a single plate is joined to form a tube, if the plate end is joined so that it protrudes outward at the tube end, the tube cross-sectional shape may differ between the left and right Therefore, it is necessary to form the tube insertion hole of the header tank in accordance with the cross-sectional shape of the tube, which requires special jigs and the like, which increases the manufacturing cost and complicates the manufacturing process. Problem had arisen.

As in the present invention, when the end joining portion of the tube plate formed by folding a single plate is changed, the cross-section of the tube is reduced. The left and right shapes can be made the same, the assemblability is improved, and the number of manufacturing equipment can be reduced and the manufacturing process can be simplified.

Further, according to the third aspect of the present invention, in the third aspect, each of the tubes has a U-turn shape in which one passage connected to one tank and the other passage connected to the other tank are formed. A first heat exchanger having a one-tank structure is formed by the tank and the one U-turn shaped passage of the tube, and the one tank is formed by the other tank and the other u-turn shaped passage of the tube. This is a heat exchanger having a configuration in which a second heat exchanger having a tank structure is formed.

That is, it is also used for a heat exchanger having a configuration in which a U-turn-shaped passage is formed in a tube. The heat exchanger of this configuration is of a one-tank type formed by joining the end of the tube on the opposite side of the u-turn-shaped passage to a tank, and the present invention is based on the one-tank type. It can also be applied to

Such a single-tank type heat exchanger requires only half the tank as compared with the parallel flow type heat exchanger, and the heat exchange rate is improved by increasing the contact area with air. In addition, there is an advantage that the number of parts can be reduced and cost can be reduced.

Furthermore, the invention of the present application is the heat exchanger according to the third invention, wherein the tube is provided with a heat insulating hole in the closed portion that bisects the passage.

As described above, when the tube is provided with the blocking portion, the heat transfer of both the first and second heat exchangers can be reduced as small as possible by the blocking portion. If a heat insulating hole is formed in the closed portion, the heat transfer can be further prevented, so that there is an advantage that the heat exchange rates of both heat exchangers are improved.

Further, the invention of the present application is the heat exchanger according to the third invention, wherein the tube and the fin are integrally assembled and then installed in a furnace. is there.

In other words, it can be used for a heat exchanger having a configuration in which a tube and a fin are integrally assembled and attached to a furnace. Basically, a tube and a fin are integrated into a furnace and brazed in a furnace. In addition to the brazing of the tube and the fin, a tank and a tank described later are configured. Either the tank part or the end plate that constitutes the tank will be attached at the same time.

Further, the invention of the present application is the heat exchanger according to the third invention, wherein the tube, the fin, and the tank are integrally assembled and then installed in a furnace.

That is, it can also be used for a heat exchanger in which a tube, a fin, and a tank are integrally assembled and brazed in a furnace. In this case, the tank may be a cylindrical one or a two-part tank that is integrally combined and attached together with the tube and the fin. In the invention, there is provided a heat exchanger having a structure in which the tube, the fin, and the tank portion which is laminated to form a tank are integrally assembled and then brazed in a furnace.

That is, it can also be used for a heat exchanger having a structure in which a tube, a fin, and a tank portion that is laminated to form a tank are integrally assembled and brazed in a furnace. In this case, the above-mentioned laminating type, in which the tank is integrally formed with the tube, is integrally attached.

Further, the invention of the present application is the heat exchanger according to the third invention, wherein the tube, the fin, and the end plate are joined to a tank after being brazed in a furnace.

In other words, it can also be used for a heat exchanger in which tubes, fins, and end plates are attached to a tank after they are placed in a furnace. In this case, put the tube, fins and end plate in the furnace 0

18 After brazing in the middle, it is joined by caulking using a sealing material. This is the case where the pressure resistance required of the heat exchanger is not so high. Thus, according to the third invention of the present application, in the heat exchanger in which heat exchangers for substantially different applications are integrally formed. In addition, tubes satisfying different performance requirements for each heat exchanger can be integrally formed, and the durability of the heat exchanger in which heat exchangers for different applications are integrally formed is improved. It is possible to provide a heat exchanger capable of reducing the maintenance cost of the production equipment and the material cost, thereby reducing the production cost. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view of a heat exchanger according to a specific example of the first invention of the present application.

FIG. 2 is a cross-sectional view of a tube and a tank used for a heat exchanger according to a specific example of the first invention of the present application.

FIG. 3 is a view of the closed portion of the tube shown in FIG. 2 as viewed from the front.

FIG. 4 is a cross-sectional view of a tube and a tank used for a heat exchanger according to another specific example of the first invention of the present application.

FIG. 5 is a view of the closed portion of the tube shown in FIG. 4 as viewed from the front.

FIG. 6 is a sectional view of a passage of the first heat exchanger.

FIG. 7 is a cross-sectional view of a passage of the second heat exchanger.

FIG. 8 is a cross-sectional view of a tube and a tank used for a heat exchanger according to another specific example of the first invention of the present application.

FIG. 9 is a front view of the closed portion of the tube shown in FIG. 8.

[FIG. 10] According to another specific example of the first invention of the present application, a heat exchanger is used. FIG. 2 is a cross-sectional view of a tube and a tank used.

[Fig. 11] Fig. 11 is a view of the closed portion of the tube shown in Fig. 1 ◦ viewed from the front.

FIG. 12 is a view showing one tube-forming plate used for a heat exchanger according to another specific example of the first invention of the present application.

[Fig. 13] Fold the plate shown in Fig. 12 in half and chu

FIG. 4 is a cross-sectional view of a passage of the first heat exchanger when a fan is formed.

FIG. 14 is a cross-sectional view of the passage of the second heat exchanger when the tube shown in FIG. 12 is folded in half to form a tube.

FIG. 15 is a front view of a heat exchanger according to another specific example of the first invention of the present application.

FIG. 16 is a plan view of the heat exchanger shown in FIG.

FIG. 17 is a plan view of the tubes of the heat exchanger shown in FIG. 15.

FIG. 18 is a front view of a heat exchanger in which first and second heat exchangers are combined in a vertical direction according to another specific example of the first invention of the present application.

FIG. 19 is a longitudinal sectional view of a tube and a tank of the heat exchanger shown in FIG. 18.

FIG. 20 relates to another specific example of the first invention of the present application.

FIG. 3 is a perspective view of a heat exchanger in which two heat exchangers are combined in a vertical direction.

FIG. 21 is a perspective view showing a tank portion of a heat exchanger in which first and second heat exchangers are vertically combined according to another specific example of the first invention of the present application.

FIG. 22 is a longitudinal sectional view of a tube of the heat exchanger shown in FIG. 21.

FIG. 23 is a front view of a heat exchanger according to a specific example of the second invention of the present application.

FIG. 24 is a perspective view of a joining plate.

FIG. 25 is a perspective view of a joining plate. FIG. 26 is a perspective view of a joining plate.

FIG. 27 is a perspective view of a bonding plate.

FIG. 28 is a perspective view of a joining plate.

FIG. 29 is a perspective view of a joining plate.

FIG. 30 is a perspective view of a joining plate.

FIG. 31 is a perspective view of a bonding plate.

Fig. 3 2 is a cross-sectional view taken along the line X--X of the C portion of the heat exchanger shown in Fig. 23.

FIG. 3 is an enlarged perspective view of a portion C of the heat exchanger shown in FIG.

FIG. 34 is a front view of a heat exchanger according to another specific example of the second invention of the present application.

FIG. 35 is a front view of a heat exchanger according to another specific example of the second invention of the present application.

[Fig. 36] Fig. 35 is a cross-sectional view of the tube and tank shown in Fig. 35.

FIG. 37 is a perspective view of a heat exchanger according to another specific example of the second invention of the present application.

FIG. 3 8 is a sectional view taken along the line YY of the heat exchanger shown in FIG. 37.

FIG. 39 is a perspective view of a heat exchanger according to a specific example of the third invention of the present application.

FIG. 40 is a cross-sectional view of a heat exchanger according to a specific example of the third invention of the present application.

FIG. 41 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 42 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present invention.

[FIG. 43] An end face of a tube according to a specific example of the third invention of the present application. It is a perspective view of a part.

FIG. 44 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 45 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 46 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 47 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 48 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 49 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 50 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 51 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 52 is a perspective view of an end face portion of a tube according to an example A of the third invention of the present application.

FIG. 53 is a perspective view of an end face portion of a tube according to a specific example of the third invention of the present application.

FIG. 54 is a perspective view of a heat exchanger according to another specific example of the third invention of the present application.

FIG. 55 is a cross-sectional view of the tube and tank of the heat exchanger shown in FIG. 54.

FIG. 56 is a perspective view of a heat exchanger according to another specific example of the third invention of the present application.

FIG. 57 is a perspective view of a heat exchanger according to another specific example of the third invention of the present application. Ten

twenty two

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a specific example of the first invention of the present application will be described with reference to the drawings. FIG. 1 is a front view of the heat exchanger of this example, and FIG. 2 is a cross-sectional view of a tube and a tank used in the heat exchanger. The heat exchanger 1 includes a pair of tanks 2 and 2, a heat exchanger comprising a plurality of tubes 4, 4 and fins 3a, 3a, wherein each of the tubes 4, 4 is provided with an obstruction 5 in the middle to divide the passage into two, One passage 6 connected to one tank 2 and the other passage 7 connected to the other tank 2 are each formed in a U-turn shape. In FIG. 2, 60 and 70 are ridges, and these ridges 60 and 70 are joined to the plate surface, or are ridges 60 and 60 or ridges 70 and 70, respectively. The 70s are joined together, and the passages 6, 7 are formed in a U-turn shape. 7a and 7a are beads. These beads 7a are joined to the plate surface or the beads 7a and 7a are joined together to improve the pressure resistance and heat exchange. The turbulence is generated in the medium flow to improve the heat exchange efficiency. FIG. 3 is a view of the closing portion 5 as viewed from the front.

The one tank 2 and the one U-turn shaped passage 6 of the tube 4 form a first heat exchanger A having a one-tank structure, and the other tank 2 has a one-tank structure. A second heat exchanger B having a single tank structure is formed by 2 and the other U-turn-shaped passage 7 of the tube. In this example, the first heat exchanger A is a radiator, the second heat exchanger B is a condenser, and the first and second heat exchangers A and B are combined laterally to form a heat exchanger 1. Have been.

Both ends of the tubes 4, 4 are inserted and connected to the tube insertion holes (not shown) of the left and right tanks 2, 2, respectively. Side plate connection holes (not shown) are provided at the upper and lower ends of the tanks 2 and 2, respectively. Both ends of a side plate 3b having a U-shaped cross section are inserted into and joined to the plate connection hole. Further, each of the tanks 2, 2 is formed integrally with partition plates 2a, 2a in the longitudinal direction, and the interior is partitioned into an inlet side 20A, 20B and an outlet side 21A, 2IB. The inlet joints 20 A and 20 B are connected to the inlet joints 8 A and 8 B of the heat exchange medium, and the outlet sides 21 A and 21 B are connected to the outlet joints 9 A and 9 B, respectively. I have.

In this example, as will be described later, the tube 4 may be formed by combining two press-formed or roll-formed plates, or a single press-formed or roll-formed plate. One formed by folding it in half or one formed by folding one plate in half while rolling is used. The tube is made of a three-layer material with a double-sided clad or a four-layer material with an intermediate layer on the double-sided clad.

In the heat exchanger 1 described above, the heat exchange medium flows between the inlet joint 8A and the outlet joint 9A of the first heat exchanger A through the U-turn-shaped passages 6 and 6 of each tube 4 to generate heat. The heat exchange medium is similarly exchanged, and the heat exchange medium flows between the inlet joint 8B and the outlet joint 9B of the second heat exchanger B through the U-turn-shaped passages 7 and 7 of each tube 4 to exchange heat. .

By configuring the heat exchanger 1 in this manner, the heat exchanger 1 is essentially formed by combining the heat exchangers of the single tank structure (the first and second heat exchangers A and B). Regardless, a plurality of tubes 4, 4 and fins 3a, 3a alternately stacked are mounted between a pair of tanks 2, 2, and moreover, the tube 4 is a pair of tanks 2, 3. The pair of tanks 2, 2 support the ends of the tubes 4, 4 and the fins 3a, 3a, thereby increasing the rigidity of the heat exchanger. be able to. In this way, the heat exchanger 1 has a parallel flow structure even in a single tank structure. Will have the advantages of Further, in this example, since the side plate 3b is used, the strength of the heat exchanger 1 is further improved. Since the first and second heat exchangers Λ and B have a single tank structure (heat exchanger A is tank 2 and heat exchanger B is tank 2), the advantages inherent in one tank, namely, Since only one tank is required compared to a parallel-flow type heat exchanger, the space required for heat exchange can be increased, heat exchange efficiency can be improved, and the number of parts can be reduced, resulting in cost reduction. This has the advantage that the cost can be reduced.

Further, since the first and second heat exchangers Λ, Β are structurally connected to each other, the rigidity is improved as described above, while the closed portion is formed in the middle of the tube 4. 5, the heat exchange medium can be prevented from being exchanged with the heat exchange medium, and the closed portion 5 can minimize the heat transfer between the two as much as possible. The decline can be prevented. Further, the closing portion 5 enables the tube 4 to be integrally formed by connecting the passages of both the first and second heat exchangers Α and Β.

Hereinafter, preferred embodiments will be described with reference to the drawings. Note that common components are denoted by the same reference numerals and description thereof is omitted.

In FIG. 2, the closed part 5 of the tube 4 has holes 5a and 5a for heat insulation. As described above, the provision of the holes 5a and 5a in the closing portion 5 makes it impossible to further improve the heat insulating effect.

In the specific example shown in FIGS. 4 to 7, the tube 4 is formed by combining two plates 4a and 4b, and in this example, the hole 5a is made different from that of the previous example. Are also large. The plates 4a and 4b are formed by press or roll forming.

FIG. 6 is a cross-sectional view of the passage 6 of the first heat exchanger A, and FIG. 7 is a cross-sectional view of the passage 7 of the second heat exchanger B. The ridges 60, 70 and the plate surface are joined to form the passages 6, 7 in a U-turn shape. In the passage 7, the bead 7a and the plate surface are joined to improve the pressure resistance and generate a turbulent flow in the heat exchange medium to improve the heat exchange efficiency.

FIGS. 8 and 9 show another specific example of the tube 4 in which a closed portion 5 of the tube 4 is provided with a cavity 5b for heat insulation. Thus, as in the case of the previous example, the heat insulation effect can be further improved by the cavity 5b.

FIGS. 10 and 11 show another specific example of the tube 4 in which the closed portion 5 of the tube 4 is provided with folded portions 5c, 5c. Further, separate fins 3a are arranged in the first heat exchanger A and the second heat exchanger B, and the ends of the fins are positioned at the folded portions 5c and 5c of the closing portion 5. ing.

In this example, separate fins 3a are arranged for the first heat exchanger A and the second heat exchanger B, so that fins with performance suitable for each heat exchanger must be prepared individually. As a result, the required performance of each heat exchanger can be satisfied. In addition, since the closing portion 5 has the folded portions 5c, 5c, the ends of each fin 3a are positioned by the folded portions 5c, 5c. Proper installation of the fins will be maintained, such as preventing them from popping out.

Although not shown, one fin may be provided for each of the first heat exchanger A and the second heat exchanger B. In this case, the fins are provided so that the number of fins is different between the first heat exchanger A and the second heat exchanger B. When one fin is arranged across the first heat exchanger and the second heat exchanger in this way, it is economical because only one kind of fin is required. Also, by changing the number of fins in the first heat exchanger and the second heat exchanger to change the fin pitch, it is possible to meet the required performance of each heat exchanger. You.

In the specific examples shown in FIGS. 12 to 14, one plate 4c is folded in half to form a tube 4. FIG. The tube 4 is formed by further folding the pressed or roll-formed plate 4 c in half, or by folding the plate 4 c in half while rolling. .

The specific examples shown in FIGS. 15 to 17 are of a laminated type in which the tank portions 2 b and 2 b which are laminated to form the tanks 2 and 2 are integrally formed with the tube 4. Also in this example, the heat exchanger 1 is a heat exchanger having a plurality of tubes 4, 4 and fins 3a, 3a between a pair of tanks 2, 2. Tubes 4 and 4 are provided with an obstruction 5 in the middle to divide the passage into two, and one passage 6 connected to one tank 2 and the other passage 7 connected to the other tank 2 have U-turns respectively. It is press formed into a shape.

Then, as in the previous example, one tank 2 and one U-turn-shaped passage 6 of the tube 4 form the first heat exchanger A having a single tank structure, and the other tank 2 and the tube 4 are connected to each other. The other U-turn-shaped passage 7 forms a second heat exchanger B having a single tank structure. The fins 3a are separately arranged in the first heat exchanger A and the second heat exchanger B. Therefore, a fin having a performance suitable for each heat exchanger can be individually prepared, thereby satisfying the required performance of each heat exchanger.

Note that, as described above, one fin may be arranged for each of the first heat exchanger A and the second heat exchanger B. In this case, too, the fins are provided so that the number of fins is different between the first heat exchanger A and the second heat exchanger B, and the fins can be adapted to the required performance of each heat exchanger. Can be.

The specific examples shown in FIGS. 18 and 19 are for the first and second heat exchangers. , B are combined in the vertical direction to form a heat exchanger 1, which comprises a plurality of tubes 4, 4 and a plurality of tubes between a pair of upper and lower tanks 2, 2. A heat exchanger equipped with a heat exchanger 3a, 3a, and each of the tubes 4, 4 is provided with a closed part 5 in the middle as in the previous example to divide the passage into two parts, and is connected to one of the tanks 2 The passage 6 and the other passage 7 connected to the other tank 2 are each formed in a U-turn shape. Combining the first and second heat exchangers A and B in the vertical direction as in this example, or in the horizontal direction as in the previous example, to form a heat exchanger 1 that fits the installation space be able to.

Each of the above specific examples is a heat exchanger 1 in which the tubes 4, 4 and the fins 3a, 3a are assembled together and the furnace is put in the furnace. That is, each of the heat exchangers 1 shown in Fig. 1, Fig. 15 and Fig. 18 basically includes the tubes 4, 4 and the fins 3a, 3a integrated into a furnace and brazed in the furnace. In addition to the brazing of the tubes and the fins, the tanks 2 and 2 (heat exchangers in FIGS. 1 and 18) and the tank 2 that constitutes the tanks 2 and 2 b, 2b (heat exchanger in Fig. 15) are simultaneously brazed to form a heat exchanger. On the other hand, the heat exchangers shown in FIGS. 20 to 22 are so-called retrofitted tanks and are of the caulking type and the tank separate type.

In the specific example shown in FIG. 20, the first and second heat exchangers A and B are vertically combined to form a heat exchanger 1. The heat exchanger 1 is composed of a pair of upper and lower heat exchangers. A heat exchanger provided with a plurality of tubes 4, 4 and fins 3a, 3a between tanks. Each of the tubes 4, 4 is provided with a closed part in the middle as in the previous example to provide a passage. Bifurcated, one passage connected to one tank and the other passage connected to the other tank are each formed in a U-turn shape. This heat exchanger 1 is connected to the first heat exchanger A. The tubes 4 and 4, the fins 3 a and 3 a and the end plate 2 c This is a heat exchanger with a structure in which the components are assembled together and the furnace is put in the furnace, and then the tank plate 2d is joined to the end plate 2c. That is, in this case, the tank 2 is formed by the end plate 2c and the tank plate 2d, and the tubes 4, 4; the fins 3a, 3a; After brazing 2c, the tank plate 2d is assembled and joined by caulking using a sealing material not shown. If the pressure resistance required of the heat exchanger is not so high, a structure such as tank 2 in Fig. 20 that uses a sealing material to connect by caulking or the like is also possible.

In the specific examples shown in FIGS. 21 and 22, the heat exchanger 1 is formed by combining the first and second heat exchangers B and B in the vertical direction. A heat exchanger having a plurality of tubes 4, 4 and fins 3a, 3a between a pair of tanks provided, wherein each tube 4, 4 The passage is bisected by providing a blocking portion 5, and one passage connected to one tank and the other passage connected to the other tank are each formed in a U-turn shape. In this heat exchanger 1, in the first heat exchanger A, a tank 2 is formed by an end plate 2c and a tank plate 2d, and tubes 4, 4 and fins are formed. 3a, 3a, end plate 2c and tank plate 2d are formed by soldering together in a furnace.

As described above, the heat exchanger of this specific example is basically one in which the tube and the fin are integrated and brazed in the furnace. In addition to the tube and the fin brazed, The tank, the tank, the tank part constituting the tank, the end plate constituting the tank, etc. can be brazed at the same time. In other words, when assembling tubes, fins and tanks together and brazing in the furnace, the tanks should be cylindrical or two-part tanks. It can be brazed together with the tubes and fins. In addition, the tube, fins, and the tank part that is laminated to form a tank are assembled together, that is, a laminated type in which the tank part is integrally formed with the tube is placed in a furnace. And can be. Further, it is also possible to adopt a configuration in which the tube, fin, and end plate are integrally assembled and brazed in a furnace, and then the tank plate is joined to the end plate.

In the above-described specific example, the combination of the two heat exchangers has been described as an example of a horizontal or vertical combination.However, the heat exchange formed by combining the two heat exchangers in the horizontal direction has been described. A third heat exchanger may be combined on the upper and lower sides or both sides of the heat exchanger, or a third heat exchanger may be formed on one or both sides of a heat exchanger formed by vertically combining two heat exchangers. The heat exchanger can be formed by an appropriate combination such as a combination of the above heat exchangers. Next, a specific example of the second invention of the present application will be described.

FIG. 23 shows a front view of the heat exchanger of this specific example. This heat exchanger 1 has a plurality of tubes 4 forming a first heat exchanger A between a pair of tanks 2 and 2. A, 4A, fins 3a, 3a, and a plurality of tubes 4B, 4B forming the second heat exchanger B and fins 3a, 3a are stacked in parallel and alternately with each other. The two ends of the stacked tubes 4 are inserted into and connected to tube insertion holes formed in the tank 2. That is, in the heat exchanger], a pair of tanks 2 and 2 are erected on the left and right of the tube, and both ends of the tubes 4 A and 4 A constituting the first heat exchanger A are connected to the upper side of the tank 2. Tubes 4 B, 4 B constituting the second heat exchanger B are connected to the lower side of the tank 2, and the first and second heat exchangers A, B are connected in parallel in the vertical direction. Is formed. In this example, the first heat exchanger A has a radiator and the second heat exchanger B has a condenser. Is formed. The upper and lower openings of the tank 2 are closed by caps 3c. In this example, the tank 2 is formed by rolling a flat plate material into a circular tube shape. The ends of the side plates 3b, 3b are inserted and joined to the side plate connection holes. Also, one tank 2 is connected to inlet / outlet joints 8 A and 9 A communicating with the first heat exchanger A and the inlet joint 8 B communicating with the second heat exchanger B, and the other tank 2 is connected to the other tank 2. The outlet joint 9B communicating with the second heat exchanger B is connected. Further, partition plates 10 for partitioning the inside of the tank 2 in the longitudinal direction are provided at required positions of both the tanks 2.

Then, in such a heat exchanger 1, the heat exchange medium flows between the inlet joints 8A and 8B and the outlet joints 9A and 9B in a meandering manner a plurality of times. That is, the heat exchange medium supplied to the artificial joints 8A and 8B of the heat exchanger 1 forms the first heat exchanger A and the second heat exchanger B from the left and right tanks 2 and 2, respectively. It flows through the tubes 4Λ and 4B in a meandering manner a plurality of times. When passing through the tubes 4A and 4B, it exchanges heat with the outside, and the outlet joints 9A and 9B force Is discharged. The tubes 4A and 4B may be formed by extrusion molding, formed by combining two plates formed by press or mouth-forming, or formed by pressing or roll-forming one plate. Further, a plate formed by folding the plate further in half or a plate formed by folding one plate in half while performing roll forming is used. Also, as the material of the tube, an extruded material, a three-layer material of a double-sided clad, a four-layered material having a middle layer in a double-sided clad, and the like are used.

The heat exchanger 1 is provided between the tube 4A constituting the first heat exchanger A and the tube 4B constituting the second heat exchanger B, and a heat insulation area 1 1 without a fin 3a interposed therebetween. Are formed. As described above, when the heat insulating section 11 is formed between the first heat exchanger A and the second heat exchanger B, the heat insulating section 11 transfers heat between the heat exchangers. In this way, the first heat exchanger A and the second heat exchanger B can exchange heat at the optimum temperature. For this reason, it is possible to provide an integrated heat exchanger that prevents performance degradation of each heat exchanger.

Further, by integrally forming the first heat exchanger A and the second heat exchanger B having two different uses, the heat exchange space can be expanded and the heat exchange rate can be improved. At the same time, the number of parts is reduced, and costs can be reduced.

In addition, a joint plate 12 having a length substantially equal to the length of the tubes 4A and 4B is provided in a heat insulating area 11 formed between the vertically adjacent tubes 4A and 4B. The tubes 4A and 4B, the fins 3a and 3a, and the joining plate 12 are brazed together in the furnace.

In the heat exchanger 1, since the heat insulating area 11 is formed, the pressure resistance and the like of the heat insulating area 11 may be reduced, and inconvenience such as deformation may occur during production. By disposing the joining plate 12 in the heat insulating area 11, the inconvenience can be solved and the heat exchanger_L ^ can be reinforced.

The joining plate 12 is a flat joining material. The joining plate is formed by bending a joining plate into a rectangular shape or a wavy shape. The joining plate is made of a three-layered material of double-sided clad or a bare material, and the joining plate 12 together with the tube and fins is integrally formed by brazing in a furnace. You. In particular, when the flat plate is bent and the bonding plate 12 is brazed, the pressure resistance of the bonding plate can be improved, the heat transfer area decreases, and the heat transfer between the two plates decreases. Heat can be prevented.

Hereinafter, preferred embodiments of the joining plate 12 will be described with reference to the drawings. Will be explained.

FIGS. 24 to 31 show specific examples in which the joining plate is bent into a rectangular shape or a wavy shape. The long side direction of the joining plate, which is a flat plate material, is represented by the longitudinal direction, the short side direction is represented by the vertical direction, the long side is represented by the long end, and the short side is simply represented by the end.

As shown in Fig. 24, for example, both ends of the joining plate are bent twice in the vertical direction to form an end joining portion 12a having a square frame shape with a partially open side surface. Further, the central flat portion is bent in the vertical direction at an equal interval to form a plurality of projections 12 b and a plurality of turns 12 c to form a bonding plate 12 (1). Is molded. The joining plate] 2 (〗) improves the strength such as pressure resistance at both ends by the end joining portion 12a, and has a central portion by a plurality of convex portions 12b and concave portions 12c. It also has improved pressure resistance. If the joining plate 12 (1) is formed unevenly in this way, for example, the flat surface of the end joining portion 12a and the flat surface of the convex portion 12b are joined to the tube 4A. The tube 4B is formed by joining the opposite surface of the end joining portion 12a of the joining plate 12 (1) and the flat surface of the concave portion 12c to the joining plate 12 (1) and the tubes 4A and 4B. Since the heat transfer area of B is reduced, the heat transfer between the first heat exchanger and the second heat exchanger can be reduced.

Fig. 25 shows a joint plate that is approximately half the length in the longitudinal direction of the tube 4 when it is bent, and both ends of the joint plate are bent twice in the vertical direction. In addition, a joining plate 12 (2) having a joining portion 12d having a rectangular end is formed. By disposing the two joining plates 12 (2) in the heat insulating area 11, the heat insulating area 11 is reinforced.

In addition, the joining plate 12 (3) shown in FIG. 26 is obtained by bending both ends of the joining plate into a rectangular shape in the vertical direction, and joining both ends of the joining plate 12 (3). The L-shaped joint 1 2 e L-shaped cuts are formed from the two long ends at predetermined intervals on the plane portion of the central portion, and the four pieces formed by the cuts are vertically diffracted twice. By bending, four L-shaped protrusions 12 f having a height substantially equal to the protrusions 12 e are formed inwardly of the joining plate 12 (3).

Fig. 27 shows a welded plate 12 (4) in which the welded plate is bent sequentially in the vertical direction to form a wavy shape.

FIG. 28 shows a joining plate 12 (5) having a joining portion 12 g formed by bending both long ends of the joining plate into a rectangular shape in the longitudinal direction.

FIG. 29 shows a joining plate 12 (6) having a structure in which a plurality of holes 12h are formed in a plane portion of the joining plate 12 (5).

FIG. 30 shows a joining plate 1 2 (7) in which both long ends of the joining plate are bent into a rectangular shape in the longitudinal direction, and a flat portion is bent in the longitudinal direction so as to form recesses 1 2 i. ).

FIG. 31 shows a joining plate 12 (8) in which the joining plate is bent into a wavy shape in the longitudinal direction.

The joining plate 12 shown in these specific examples improves the heat exchanger's strength, such as pressure resistance, by bending and joining the joining plate, and forms the first heat exchanger A. The heat transfer area between the tube 4A and the tube 4B constituting the second heat exchanger B is reduced to prevent heat transfer between both tubes. Also, as in the case of the joining plate 12 (4) and the joining plate 12 (8), the joining plate 12 is formed by bending the joining plate into a wave shape in the vertical direction or the longitudinal direction. In this case, it is better to bend at a certain interval because bending too finely has the same effect as fins.Then, in the heat exchanger, 1 The tubes that make up heat exchanger A and the tubes that make up second heat exchanger B A description will be given of the cavity formed inside the tank by providing two partition plates in the intervening tank and closing the inside of the tank.

Fig. 32 shows a cross-sectional view of a part of heat exchanger 1 (part C in Fig. 23), and Fig. 33 shows a part of tank 2 that constitutes heat exchanger 1 (part C in Fig. 23). A perspective view of the partition plate 10 is shown. The arrow in the figure indicates the direction of gravity.

As shown in FIG. 32, a heat insulating area 11 is formed between the tube 4A and the tube 4B, and the tank 2 on the extension of the heat insulating area 11 Between the tube 4A and the tube 4B, two slits] 3, 13 of a predetermined shape are formed. The partition plate 10 has a large diameter portion 10a corresponding to the outer periphery of the tank 2, a small diameter portion 10b corresponding to the inner periphery of the tank, and a large diameter portion 10a and a small diameter portion 10b. It is molded with the step 10 c provided at the point. When the two partition plates 10 and 10 are inserted from the slits 13 and 13 and inserted, the inside of the tank 2 is separated by the two partition plates 10 and 10. Is closed, and a cavity 14 is formed. Further, a communication hole 15 is formed in a portion of the outer wall of the tank 2 constituting the cavity 1.4 below the outer wall of the tank 2 in the direction of gravity.

In this way, if the space 14 is formed inside the tank 2 between the first heat exchanger A and the second heat exchanger, the heat exchanger A and the heat exchanger B are formed in the heat insulating area 11. Since the heat conduction generated in the first heat exchanger A and the second heat exchanger B can be prevented, the heat exchangers used for two different purposes can be used as a common tank without deteriorating the performance of the first heat exchanger A and the second heat exchanger B. It can be formed integrally. In addition, if the communication hole 15 for communicating the cavity portion 14 with the outside is formed, the inside of the tank 2 is not obstructed by the poor joining or brazing of the partition plates 10, 10. When a non-defective product is formed, the communication hole 15 This makes it possible to check for leaks and to find defective products at an early stage.

In addition, there is a possibility that air or the like enters the inside of the hollow portion 14 from the communication hole 15, changes depending on temperature conditions and pressure conditions, becomes water, and accumulates inside the hollow portion 14. However, since the communication hole 15 is formed in a portion below the outer wall of the tank 2 constituting the hollow portion 14 in the direction of gravity, moisture accumulated in the hollow portion 14 can easily be removed. 4 to prevent corrosion of tank 2 caused by accumulation of water o

Hereinafter, other preferred embodiments will be described with reference to the drawings. The common components are denoted by the same reference numerals and description thereof is omitted. In the specific example shown in FIG. 34, the first and second heat exchangers A and B are arranged in parallel in the horizontal direction and heat is removed. This heat exchanger 1 has a plurality of tubes 4A, 4B and fins 3a, 3a vertically connected between a pair of upper and lower tanks 2, 2. Between the tube 4A constituting the first heat exchanger する adjacent to the left and right and the tube 4B constituting the second heat exchanger B as in the previous example. 1 is formed. The heat insulating area 11 is provided with a bonding plate 12. Further, the tubes 4 A and 4 B of the upper and lower tanks 2 to which the tubes 4 A constituting the first heat exchanger A and the tubes 4 B constituting the second heat exchanger B adjacent to each other are connected. Between them, two partition plates 10 and 10 are provided, and the inside of the tank 2 is closed to form a cavity (not shown). On the outer wall of the tank 2 constituting the hollow portion, a communication hole 15 for communicating the hollow portion with the outside is formed in a portion below the gravity direction.

The specific examples shown in FIGS. 35 and 36 form a laminated tank 2. The formed tank portions 2b and 2b are of a laminated type integrally formed with the tubes 4A and 4B. In this example, the heat exchanger 1 is a single-tank type heat exchanger having tank portions 2b, 2b and fins 3a, 3a between the tubes 4, 4. The tubes 4A and 4B are provided with partitioning ridges 22 from one end formed in the tank 2 to the vicinity of the other end of the body. As a result, the forward and backward paths of the heat exchange medium are formed in the tubes 4A and 4B along the longitudinal direction, and the path is formed in a U-turn shape at the other end.

As in the previous example, no fin 3a is interposed between the tubes 4A constituting the first heat exchanger A and the tubes 4B constituting the second heat exchanger B adjacent to each other on the left and right. A heat insulating area 11 is formed, and a joining plate 12 is provided in the heat insulating area 11 described above. Therefore, since the heat conduction of the first heat exchanger Λ and the second heat exchanger B is insulated in the heat insulating area 11, the required performance of each heat exchanger can be satisfied.

In the specific examples shown in Figs. 37 and 38, the tubes 4A, 4B and the fins 3a, 3a constituting the first and second heat exchangers A, B are connected vertically to the tank 2. The first and second heat exchangers A and B are combined in parallel to form a one-tank type heat exchanger 1, and tubes 4A constituting the first heat exchanger adjacent to the left and right sides are formed. A heat insulating area 11 without the fin 3a is formed between the tube 4B and the second heat exchanger, and a joining plate 12 is arranged in the heat insulating area 11. Has been established. Each of the tubes 4A and 4B is provided with a projection 22 for partitioning from one end side formed in the tank 2 to the vicinity of the end on the other end side. In the tubes 4A and 4B, a forward path and a return path of the heat exchange medium are formed along the longitudinal direction, and at the other end side, the path is formed in a U-turn shape. In this heat exchanger 1, the tank 2 is Tubes 4A and 4B, fins 3a and 3a, and end plate 2c, which are formed integrally with each other, and which is formed by tank 2d and tank plate 2d. This is a heat exchanger that attaches the tank plate 2d to the end plate 2c by torch, welding, and force-staking.

In other cases, the tube 4A, 4B, the fins 3a, 3a, the end plate 2c, and the tank plate 2d may be integrally formed in a furnace.

Also, in the heat exchanger 1 of the present example, the tubes 4 A and 4 A of the tank 2 to which the tube 4 A constituting the first heat exchanger A and the tube 4 B constituting the second heat exchanger B are connected. By providing two partition plates 10 and 10 between the tubes 4B and closing the inside of the tank 2, a cavity 14 formed inside the tank 2 is formed. A communication hole 15 is formed on the outer wall of the tank 2 that constitutes 4 at a portion below the direction of gravity. That is, in this example, the communication hole 15 is formed in the end plate 2c.

As described above, the heat exchanger of this specific example is basically one in which the tube and the fin are integrated and brazed in the furnace. In addition to the brazing of the tube and the fin, One of a joining plate, a tank, a tank portion forming a tank, an end plate forming a tank, and the like can be simultaneously brazed. The tank is formed by rolling the tank material into a round tube, or by dividing it into two parts, or by assembling the tube with the fin and the tank part that is laminated to form the tank. It is possible to mount a laminated type with the integral molding in the furnace.

In the above-described specific example, the combination of the two heat exchangers is described as an example in which the combination is horizontal or vertical. Is formed by combining a third heat exchanger on one or both of the upper and lower sides of the heat exchanger formed by combining in the horizontal direction, or by combining two heat exchangers in the vertical direction. The heat exchanger can be formed by an appropriate combination such as combining a third heat exchanger on one or both sides of the heat exchanger. Next, a specific example of the third invention of the present application will be described.

FIG. 39 is a perspective view of the heat exchanger of this embodiment, and FIG. 40 is a cross-sectional view of the heat exchanger. The heat exchanger 1 is arranged between a pair of tanks 2 and 2 in parallel with each other. This is a heat exchanger with multiple fins 3a, 3a and tubes 4, 4, which are alternately stacked. As will be described later, the passage inside the tube 4 is divided into two by a closing portion 5. In the tanks 2 and 2, a partition plate is formed in a longitudinal direction with a 2a force-body, and the tanks 2A and 2A of the first heat exchanger A and the tank 2B of the second heat exchanger B are formed inside. , 2B, and the inlet joints 8A, 8B are connected to one tank, and the outlet joints 9A, 9B are connected to the other tank, respectively. The upper and lower ends of the tanks 2B, 2B are closed by caps 3c, 3c. The tanks 2 at the upper end and the lower end of the stacked tubes 4 and 4 are provided with side plate connection holes (not shown), and these side plate connection holes have a U-shaped cross section. G3b, both ends of 3b are inserted and joined. A partition plate (not shown) for partitioning the inside of the tank 2B of the second heat exchanger B in the longitudinal direction is provided at a required portion of the tank 2B, and the inside of the tank is divided into a plurality. Divided. In this example, the first heat exchanger A is a radiator, the second heat exchanger B is a condenser, and the first and second heat exchangers A and B are arranged downstream and upstream in the ventilation direction and combined. 1 is formed.

As further shown in Figure 41, tube 4 contains two plates. Both ends 4 m and 4 n are formed by joining both ends of the tube. The tube 4 is divided into two passages in the longitudinal direction of the tube by a closed portion 5, and is connected to one of the tanks 2 A and 2 A. Path 6 and the other path 7 connected to the other tanks 2B, 2B. The heat exchange medium flows between the inlet joints 8A and 8B and the outlet joints 9A and 9B through the passages 6 and 7 of the tube 4 to exchange heat. The passage 7 is formed with beads 7 a, 7 a having a U-shaped cross section projecting inward of the tube, and the tip of the bead 7 a is joined to the plate surface. The bead 7a has an oval shape.

In this way, by providing the beads 7a, 7a in one of the passages 7, the pressure resistance of the tube 4 is improved, and an appropriate turbulence is generated in the flow of the heat exchange medium to generate heat. The exchange rate can be improved, and the required performance of each heat exchanger can be satisfied.

Further, the tube 4 can minimize the heat conduction of both heat exchangers by the formed closed portion 5 and prevent the transfer of heat between the heat exchangers. The heat exchange rate can be improved. Further, the closed part 5 of the tube 4 is provided with holes 5a and 5a for heat insulation. By providing the holes 5a and 5a in the closing portion 5 in this way, the heat insulating effect can be further improved.

The tube material is made of a JIS Λ303 alloy (Al-Mn-based) as a core material, and JISA4045 (A1-S) is formed on both the inner layer and the outer layer of the tube. Three-layer material clad with i-type) as brazing material, or JISA 300 (A1-Mn-type) as the core material and 100-type in the layer inside the tube (99.0 wt% A 1) Aluminum alloy is clad, and JISA4045 (Al-Si series) is applied to both the inner layer and outer layer of the tube. Four layers of clad material are used as the filler material. In this way, when the filler material is clad in the inner and outer layers of the tube, the potential difference between the core material and the filler material makes the potential of the core material noble. The corrosion resistance of the outer and inner surfaces of the tube can be improved by the sacrificial anode effect of the brazing material. Further, when a tube is formed using a four-layer material having an intermediate layer having a potential lower than the potential of the core material between the core material and the filter material, the surface of the intermediate layer can be sacrificed with uniform sacrificial protection. Thus, the pitting resistance of the inner surface of the tube is improved.

In addition, the tube is formed using a three-layer material in which the filler material is clad on both sides of the core material, or a four-layer material in which the filler material is clad in the core material and the intermediate layer. When formed, the strength of the tube itself, such as pressure resistance, is improved.In addition to this example, aluminum or aluminum alloy used for the three-layer material or the four-layer material includes, for example, Si and Mg added. Precipitation of the intermetallic compound Mg 2 S i using an aluminum alloy to improve the strength of the material and to improve the structural strength of the heat exchanger, and to improve the corrosion resistance of the wax An element containing an element can be used.

In addition, since the tube has a blockage, the heat conduction of both heat exchangers can be made as small as possible at the blockage, preventing heat transfer between the heat exchangers. The heat exchange rate can be improved.

In this way, it is possible to form a tube with improved corrosion resistance and pressure resistance. For example, as in the case of the radiator as the first heat exchanger A, the inner and outer surfaces of the tube can be formed. Both are required to have high corrosion resistance.Also, unlike the condenser that is the second heat exchanger B, the inner surface of the tube is not required to have much corrosion resistance, but the outer surface of the tube is required to have corrosion resistance and pressure resistance. When heat exchangers with different applications are integrally formed in a single application, it is possible to integrally form tubes that satisfy different performance requirements for each heat exchanger. Thus, when forming a heat exchanger in which the first and second heat exchangers are integrally formed, the number of parts can be reduced and the manufacturing cost can be reduced.

In addition, the fin 3a is made of an aluminum material or an aluminum alloy in which the tube 4 is clad on both sides, so that the fin material is clad with the fin material. Aluminum alloy bare material can be used. For example, it can be formed by using JISA 300 (8.1-1 ^ system) to which 1.5% Zn has been added, and the filler material is made of a material that is not clad. As a result, wear of the mold during fin formation can be reduced, and maintenance costs can be reduced. In addition, since the fin can be formed without using the clad material as the filler material, the material cost can be reduced, and the manufacturing cost can be reduced.

In addition, since 1.5% Zn is added to the fin material, when the tube 4 and the fin 4 are assembled and integrally formed, the fin 3a and the tub 4 are combined. In the combination, the potential of the tube becomes noble, and the sacrificial anode effect of preferentially corroding the fin 3a prevents the outer surface of the tube from being corroded and improves the corrosion resistance of the outer surface of the tube.

Hereinafter, a preferred embodiment of a tube formed using the above-described three-layer or four-layer aluminum material or aluminum alloy of a double-sided clad will be described with reference to the drawings. Note that common components are denoted by the same reference numerals and description thereof is omitted.

The specific examples shown in FIGS. 42 to 44 are other specific examples of the tube 4 formed by using two plates as in the example shown in FIG. 41, and are perspective views as viewed from the end face of the tube. Is shown.

As shown in FIG. 42, the tube 4 is formed by bending the plate so that the bead 7 b projects inward, and the bead 7 b is formed in the longitudinal direction of the tube 4. Is formed over The tip of head 7b is joined to the plate surface.

The tube 4 shown in FIG. 43 has a U-shaped bead 7 c with a cross section protruding inward, and the bead 7 c is also in the longitudinal direction of the tube 4 in this example. To! : Formed. The tip of this bead 7c is joined to the plate surface.

The tube 4 shown in Fig. 44 has a round bead 7d with a U-shaped cross section that protrudes inward, and the tip of the bead 7d is joined to the plate surface. .

In these examples, the case where a tube is formed by using two plates is shown, but a tube formed by folding a single plate formed by pressing or roll further into half, or Beads can also be formed on tubes formed by folding a single plate in half while forming the mouth.

The specific examples shown in FIGS. 45 to 48 are perspective views as viewed from the end face of the tube. One plate is folded in half, and the plate ends 4 m and 4 n are connected to one tube end. This is another specific example of the tube 4 formed by joining with each other.

In FIG. 45, the tube 4 is formed with long beads 7 e, 7 e having a U-shaped cross section projecting inward from one of the passages 7, and the flat shape of the long beads 7 e, 7 e. Has an oval shape. The tips of the beads 7e are in contact with each other.

Also, as shown in FIG. 46, the tube 4 has a plate that is bent so as to protrude inward to form a bead 7f along the longitudinal direction of the tube. The tips of 7 f and 7 f are in contact with each other.

Further, as shown in FIG. 47, the tube 4 is formed with a bead 7 g having a U-shaped cross section protruding inward over the longitudinal direction. The tips of this bead 7 g are in contact with each other.

Also, as shown in Fig. 48, tube 4 protrudes inward. An outgoing U-shaped round bead 7 h is formed, and the tips of the beads 7 h, 7 h are in contact with each other.

FIG. 49 shows another specific example of the tube 4 in which a plurality of beads 7 c and 7 c are formed in one passage 7 of the tube 4 and the other. A bead 6c protruding inward is also formed in the passage 6 of the vehicle, and these beads 6c and 7c are joined to the opposing plane. In this example, the beads 6c and 7c are long beads formed along the longitudinal direction of the tube.

In this example, a bead is formed not only in one passage but also in the other passage so as to improve the heat exchange rate and further satisfy the required performance of each heat exchanger such as pressure resistance. I am doing it.

The specific examples shown in FIGS. 50 to 53 are perspective views as viewed from the end face of the tube. As in the previous example, the tube 4 is formed using a single plate. The joining form and the joining portion of the end are changed.

In the tube 4 shown in FIG. 50, a long bead 7c protruding inward in the longitudinal direction of the tube is formed in one of the passages 7, and the tip of the bead 7c is a plate. Are joined to the plane. Both ends 4 m and 4 n of the plate are bent at the tube end so as to protrude inward of the tube, and the planes of the bent ends 4 m and 4 n are joined to each other.

In the tube 4 shown in FIG. 51, a plurality of long beads 7c are provided in one of the passages 7 in the longitudinal direction of the tube. Then, one plate end 4 m is bent into an L shape at the passage 7 and joined to the plate surface, and the other plate end 4 n is similarly bent at the same portion. It is bent in a letter shape and joined so as to overlap on the plate end 4 m. That is, the plate ends 4 m and 4 n form one long bead having a U-shaped cross section.

The tube 4 shown in Fig. 52 has a long bead 7c in one passage 7 The plate ends 4 m and 4 n are overlapped and joined on a plane that is formed and on which the bead 7 c is not formed. That is, the bead 7c, which is joined to the plane portion where the both ends 4m and 4n of the plate are joined, is formed in a U-shape which is shallower than the other beads, and this bead 7c, One plate end 4 m and the other plate end 4 n are overlapped and joined at the tube flat part to be joined. In the tube 4 shown in FIG. 53, a plurality of beads 7 c are formed in one passage 7, and both ends 4 m and 4 n of the plate protrude inward at the center of the other passage 6. The surfaces of the bent end portions 4 m and 4 n are joined together, and the end portions 4 m and 4 n are joined to the tube flat portion. That is, the plate ends 4 m and 4 n serve as a bead for joining and forming a tube, and also for dividing the passage 6 into two.

In this way, when forming a tube with a single plate, the joining form and the joining portion are changed without joining the plate end so that the plate end protrudes outward at the tube end. The outer shape of the tube can be made almost the same on the left and right sides by joining the tube at the end, bead, flat surface, or passage portion of the tube. Since it is not necessary to open a tube insertion hole of a different shape in the tank, manufacturing equipment is reduced, tube assemblability is improved, and the manufacturing process can be simplified. In addition, since the plate ends are joined to each other with a layer that forms the outer surface of the tube, when forming a tube that does not require corrosion resistance on the inner surface of the tube, or when an intermediate layer having a potential difference from the core material becomes the inner layer of the tube In the case where the tube is covered, it is not necessary to clad the filler material in the layer to be the inner surface of the tube, so that the production cost can be reduced.

In the specific examples shown in Figs. 54 and 55, the heat exchanger 1 is formed by combining the first and second heat exchangers A and B of a single tank type in parallel. The heat exchanger 1 shown in Fig. 54 is a heat exchanger equipped with a plurality of tubes 4, 4 and fins 3a, 3a connected to tanks 2A, 2B. . Each of the tubes 4, 4 is formed using one or two plates of aluminum or aluminum alloy which is a three-layer or four-layer material of a double-sided clad, as in the previous example.

As shown in Fig. 55, the tube 4 is divided into two passages in the longitudinal direction of the tube by the obstruction 5, and is connected to one passage 6 connected to one tank 2A and the other tank 2B. Another passage 7 is formed. Protrusions 60, 70 are formed at the center of each of the passages 6, 7, and these ridges 60, 70 are joined to the bracket surface, or ridges 60, 70 are formed. 60 or ridges 70, 70 The same soil is joined, and each passage 6, 7 is formed in a U-turn shape. 7a and 7a are oval long beads, and these long beads 7a and 7a are joined to the plate surface, or the long beads 7a and 7a are joined to each other. ing. With this configuration, the tank is halved in comparison with a normal flow type heat exchanger, and the contact area with air is increased, thereby improving the heat exchange rate. However, there is an advantage that the number of parts is reduced and cost is reduced.

In the specific example shown in FIG. 56, the single-tank type first and second heat exchangers A and B are arranged in parallel so that the tank positions are alternated. Is located on the left and the other tank 2B is located on the right. A plurality of tubes 4, 4 and fins 3a, 3a are provided between the tank 2A and the tank 2B, and each of the tubes 4, 4 is provided with a closed portion 5 in the middle thereof as in the previous example. Is divided into two, and one passage 6 connected to one tank 2A and the other passage 7 connected to the other tank 2B are each formed in a U-turn shape. The tubes 4 and 4 are formed using one or two plates of aluminum or aluminum alloy which is a three-layer or four-layer material of a double-sided clad. . Five It is formed using an aluminum material or an aluminum alloy to which% is added. In this way, the heat exchanger formed by combining the first and second heat exchangers A and B of the single tank type can be mounted on both sides when assembled to the vehicle body. The assemblability is improved.

The specific example shown in FIG. 57 is a laminated type in which the tank portions 2b and 2b forming the stacked tanks 2A and 2B are integrally formed with the tubes 4 and 4. In this case, too, the heat exchanger 1 has a plurality of tubes 4, 4 between two pairs of tanks 28, 2A and 2B, 2B arranged in parallel. In the exchanger, each of the tubes 4 and 4 is provided with a blocking portion 5 on the way to divide the passage in the longitudinal direction into two, and one passage 6 connected to one of the tanks 2 タンク and 2Λ and the other The other passage 7 connected to the tanks 2B, 2B is formed. Then, as in the previous example, the tubes 4, 4 are formed using one or two plates of aluminum or aluminum alloy that is a three-layer material or a four-layer material of a double-sided clad. Tubes satisfying the required performance of each vessel are integrally molded.

As described above, the heat exchanger of this specific example is basically one in which the tube and the fin are integrated and brazed in the furnace, and the heat is attached to the tube and the fin. In addition, joining plate, tank

In addition, any one of a tank part constituting the tank, an end plate constituting the tank, and the like can be brazed at the same time. The tank is formed by rolling the tank material into a round tube, or by dividing it into two parts, or by assembling the tube and the fin and the tank part that is laminated to form the tank. The integrally molded laminate type can be brazed in a furnace.

In the specific example described above, an example in which two heat exchangers are combined in parallel in the horizontal direction has been described as an example. Appropriate, such as one formed by combining in parallel in the vertical direction, or combining a third heat exchanger on one or both upper and lower sides of a heat exchanger formed by combining two heat exchangers The combination can form a heat exchanger. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention is applied to a heat exchanger for automobiles and home electric appliances, and is particularly used as a heat exchanger for automobiles in which a radiator and a capacitor are integrally formed.

Claims

The scope of the claims

1. In a heat exchanger including a pair of tanks and a plurality of tubes and fins provided between the tanks,

In the tube, a closed portion is provided in the middle to divide the passage into two, and one passage connected to one tank and the other passage connected to the other tank are formed in a U-turn shape, respectively. A first heat exchanger having a one-tank structure is formed by the one tank and the one-turn U-shaped passage of the tube; and the other U-turn of the other tank and the tube is formed. A heat exchanger characterized in that a second heat exchanger having a one-tank structure is formed by the passage having the shape.

2. The heat exchanger according to claim 1, wherein the tube is formed by joining two plates or by folding one plate in half.

3. The heat exchanger according to claim 1, wherein the tube is formed by integrally forming a tank portion which is stacked to form a tank.

4. The heat exchanger according to claim 1, wherein the closed portion of the tube has a hole for heat insulation.

5. The heat exchanger according to claim 1, wherein the closed portion of the tube has a cavity for heat insulation.

6. The closed portion of the tube includes a folded portion, and further, separate fins are arranged for the first heat exchanger and the second heat exchanger, and the folded portion of the closed portion is provided. 2. The heat exchanger according to claim 1, wherein a position of an end of the fin is determined by a method.

7. One fin is arranged over each of the first heat exchanger and the second heat exchanger, and the fin is provided with the first heat exchanger, the second heat exchanger, and the second heat exchanger. 2. The heat exchanger according to claim 1, wherein the number of fins is different.

8. The heat exchanger according to claim 1, wherein the tube and the fin are integrally assembled and mounted in a furnace.

9. The heat exchange an 10 according to claim 1, wherein the tube, the fin, and the tank are integrally assembled and brazed in a furnace. 4. The heat exchanger according to claim 3, wherein the tank portion forming the heat exchanger is integrally assembled and brazed in a furnace.

11. The method according to claim 1, wherein the tube, the fin, and the end plate are integrally assembled and then brazed in a furnace, and the tank plate is joined to the end plate. The heat exchanger according to 1.

12. The heat exchanger according to claim 1, wherein a side plate is provided between the pair of tanks.

1 3. In a heat exchanger in which tubes and fins are alternately stacked, and the ends of the tubes are inserted into the tank and connected,

A heat exchanger body formed by laminating the tubes and fins is divided into a first heat exchanger and a second heat exchanger, and a heat exchanger is provided between the divided first and second heat exchangers. A heat exchanger characterized by being provided with a heat insulating area where no fins exist.

14. The first and second heat exchangers are vertically or horizontally adjacent to each other, and the heat insulating area is provided with a joining plate for joining the adjacent first and second heat exchangers. 13. The heat exchanger according to claim 13, wherein the heat exchanger is a heat exchanger.

15. The heat exchanger according to claim 13, wherein a partition is provided in the tank to separate the first and second heat exchangers.

16. The partition is characterized in that at least two partition plates are formed, and a cavity is formed inside the tank by the two partition plates. The heat exchanger according to claim 15, wherein

17. The heat exchanger according to claim 16, wherein the cavity has a communication hole communicating with the outside.

18. The first and second heat exchangers are provided between a pair of tanks, and each of the tubes is provided with a closed portion in the middle to divide the passage into two, and One of the passages connected to the tank and the other of the passages connected to the other tank are respectively formed in a return shape, and the one tank and the one U-turn-shaped passage of the tube are formed by a return shape. A first heat exchanger having a one-tank structure is formed, and a second heat exchanger having a one-tank structure is formed by the other tank and the other U-turn-shaped passage of the tube. 14. The heat exchanger according to claim 13, wherein the heat insulating area is formed in the closed part that is bisected.

19. The first and second heat exchangers each have a single tank structure and are adjacent to the left and right or up and down, and the tube integrally forms a tank portion forming a tank. 14. The heat exchanger according to claim 13, wherein:

20. A tube constituting the first heat exchanger and a tube constituting the second heat exchanger are arranged downstream and upstream in the ventilation direction, and a fin is arranged between the two tubes. The end of each tube is inserted and connected to each tank to form the first and second heat exchangers, and the first and second heat exchangers are joined together for heat exchange. In the vessel

The tube is formed by bending a single plate made of an aluminum material or an aluminum alloy which is clad on both sides, or by joining two plates. The tube has a closed portion that bisects the passage along the longitudinal direction, and one of the tubes forms the second heat exchanger, and the other forms the second heat exchanger. ,

Further, the fin disposed between the tubes is a non-cladding material made of an aluminum material or an aluminum alloy.

2 1. The tube material that forms the tube is made of aluminum or aluminum alloy as the core material, and A 1 —Si-based filler material is used for the inner layer of the tube and the outer layer of the tube. The core is a clad three-layer material or aluminum or aluminum alloy, and an aluminum or aluminum alloy having a lower potential than the core is clad in the intermediate layer. 20. The method according to claim 20, wherein a four-layered material in which a layer serving as an inner surface of the tube and a layer serving as an outer surface of the tube are clad with A 1 —Si-based filler material. Heat exchanger.

22. The tube is formed with a plurality of protrusions protruding inward in one or both passages, and the tips of the protrusions are in contact with each other, or the tip of the protrusion is planar with the protrusions. The heat exchanger according to claim 20, wherein the parts are joined.

23. The tube is formed by folding a single plate, and the ends of the plates constituting the tube are connected to a bead portion, a flat portion, and an end portion of the tube. 20. The heat exchanger according to claim 20, wherein the heat exchanger is brazed by being overlapped at a passage portion.

24. In each of the tubes, one passage connected to one tank and the other passage connected to the other tank are each formed in a U-turn shape, and the one tank and the tube are connected to each other. The first heat exchanger having a one-tank structure is formed by the above-mentioned U-turn-shaped passage, and the first heat exchanger having a one-tank structure is formed by the other tank and the other U-turn-shaped passage of the tube. 22. The heat exchanger according to claim 20, wherein two heat exchangers are formed.

25. The heat exchanger according to claim 20, wherein the tube is provided with a heat insulating hole at the closed portion that bisects the passage.

26. The heat exchanger according to claim 20, characterized in that the tube and the fin are integrally assembled, and the resultant is then placed in a furnace.

27. The heat exchanger according to claim 20, wherein the tube, the fin, and the tank are integrally assembled and brazed in a furnace.

28. The heat exchanger according to claim 20, wherein the tube, the fin, and the tank portion that is laminated to form a tank are integrally assembled and brazed in a furnace.

29. The heat exchanger according to claim 20, wherein the tube, the fin, and the end plate are joined to a tank after being brazed in a furnace.