WO2001061264A1

WO2001061264A1 - Heat exchanger

Info

Publication number: WO2001061264A1
Application number: PCT/JP2000/008616
Authority: WO
Inventors: Souichi Kato; Mutsumi Fukushima; Muneo Sakurada
Original assignee: Zexel Valeo Climate Control Corporation
Priority date: 2000-02-21
Filing date: 2000-12-06
Publication date: 2001-08-23
Also published as: JP2001235296A

Abstract

A heat exchanger, wherein a tank (7) is formed so that access port side parts (18) and (19) defined by a partition wall (17) extending in a laminated direction are opened on a side along a ventilating direction, and a slit hole (22) passing through a closing member (20) in the axial direction of the openings in the tank (7) is provided in the closing member (20) at a portion between projected parts (21) and (21) when the openings of the tank (7) are closed by the closing member (20), whereby, when the tank having a plurality of compartments therein disposed in parallel with each other in ventilating direction and having the openings provided along the ventilating direction is used, such a bypass leakage that heat exchanging medium bypasses from one compartment to the other one without passing through the heat exchanging medium path of tube can be detected.

Description

Specification

Heat exchanger technical field

The present invention relates to a heat exchanger used for an air conditioner for a vehicle, for example, in which a tank is arranged at least at one end of a tube, and the tank has a plurality of compartments arranged in parallel in a ventilation direction. Background art

Tubes and fins through which the heat exchange medium flows are alternately laminated in a plurality of stages, and a tank is provided at at least one end of the tube so as to communicate with the tube. As a heat exchanger partitioned into a plurality of extending chambers, each of the chambers has an opening on the side along the ventilation direction, and the opening is closed by fitting a projection formed on a cap into the opening. In addition to 1 0—1 940, there are many others.

However, when a tank partitioned into a plurality of compartments whose interiors extend in the tube stacking direction is closed by a cap, as shown in FIG. 8, compartments 100 and 101 are connected to each other. If there is a bad brazing between the partition wall 102 and the tank side surface of the closing member 103, for example, the compartment 10 The heat exchange medium bypasses from 0 to the compartment 101 as shown by the arrow in FIG. 8, which may cause a problem that the heat exchange capacity of the heat exchanger is reduced.

This bypass leak is obstructed by the blocking member and cannot be seen. Therefore, at present, heat exchangers with low heat exchange capacity were distributed to the market.

In view of this, the present invention provides a method of using a tank having a plurality of compartments and closing the opening of the compartments with a closing member, in which a heat exchange medium passes from one compartment to another via a heat exchange medium passage of a tube. It is an object of the present invention to provide a heat exchanger capable of detecting a bypass leak that bypasses without bypass. Disclosure of the invention

In order to achieve the above object, a heat exchanger according to the present invention includes a tube having a heat exchange medium passage therein, a fin alternately laminated with the tube, and at least one side of the tube. A heat exchanger that has a plurality of compartments arranged side by side in the ventilation direction and opened on the side along the ventilation direction, and the opening of the compartment is closed by a closing member. In the method, heat that leaks the heat exchange medium to the outside of the heat exchanger between the compartments of the tank and the compartments in the middle of the flow path where the heat exchange medium leaked from one compartment flows to the other compartment or to the blocking member It is characterized by providing an exchange medium detecting means.

Specifically, the heat exchange medium detecting means includes a heat exchange medium detecting means, which is provided at a portion between the openings of the tank of the closing member in the axial direction of the opening of the tank. It has a slit hole penetrating through it. In this heat exchange medium detecting means, each opening of the tank is closed with a different closing member, and a gap is provided between adjacent closing members. Further, the heat exchange medium detecting means may include the closing member A portion between the openings of the tank is protruded outward in the laminating direction to form a groove inside the laminating direction. Further, the heat exchange medium detecting means is provided with a groove provided by depressing a portion of the tank between the compartments inward in the stacking direction.

Therefore, if a brazing failure occurs between one compartment and the side wall of the tank of the closing member, the heat exchange medium will flow out of the heat exchanger from the opening side of the compartment, and the heat exchange medium will be tested. Since it is possible to confirm the leakage of the heat exchanger in advance, it is possible to prevent such a defective heat exchanger from flowing to the market.

In addition, a heat exchanger according to the present invention includes a tube having a heat exchange medium passage therein, fins alternately stacked with the tubes, and a tank disposed on at least one side of the tubes. A heat exchanger having a plurality of compartments that are arranged in parallel in the ventilation direction and open on the side along the ventilation direction, wherein the tank has a radial direction relative to the compartment near an opening on a peripheral surface of the compartment. It is also possible to provide an opening which is open in the opening, and fit the closing member into this opening.

The heat exchanger may be of a single-ink type having a tank only on one side of the tube, but is opposite to the side of the tube on which the tank is arranged. On the opposite side, a two-tank type in which a tank that allows the heat exchange medium to be turned back from the heat exchange medium passage communicating with one compartment to the heat exchange medium passage communicating with another compartment may be provided separately. When the tanks are provided on one or both of the tubes, the tanks may be integrally formed by extrusion.

With such a configuration of the heat exchanger, even in a tank having a plurality of compartments in the ventilation direction, a partition separating the compartments from the compartments is integrally formed, so that one compartment and another compartment are formed. And the heat exchange medium does not directly bypass.

And when the said tube has a winding part, it is good also as what was arranged so that this winding part may become the upstream of a ventilation direction.

By arranging such a tube, the thickness of the upstream side of the tube is increased by the tightened portion, so that the corrosion resistance against corrosion caused by the attachment of dust and the like blown from the windward side is improved. And the life of the tube can be extended. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a partially cutaway view showing a configuration of a heat exchanger according to the present invention. FIG. 2 is a perspective view showing the arrangement of tubes and fins of the same heat exchanger. FIG. 3 is an explanatory view of a configuration in which a slit hole is provided in a closing member as means for detecting a leaked heat exchange medium according to the present invention, and FIG. 3A shows an opening of the cylindrical member. Fig. 3B is a cross-sectional view showing a state where the closing member is inserted into the tubular member. the 4th FIG. 4 is an explanatory view of a configuration in which a gap is provided between a plurality of closing members as a means for detecting a leaked heat exchange medium according to the present invention, and FIG. 4 (a) shows an opening of a cylindrical member. FIG. 4 (b) is a cross-sectional view showing a state in which the closing member is fitted around the tubular member. FIG. 5 is an explanatory view of a configuration in which a groove is provided in a closing member as means for detecting a leaked heat exchange medium according to the present invention, and FIG. 5 (a) shows the vicinity of an opening of the tubular member. FIG. 5 (b) is a cross-sectional view showing a state where the closing member is inserted into the tubular member. FIG. 6 is an explanatory view of a configuration in which a groove is provided in a cylindrical member as a means for detecting a leaked heat exchange medium according to the present invention. FIG. 6 (a) shows an opening of the cylindrical member. FIG. 6 (b) is a cross-sectional view showing a state where the closing member is inserted into the tubular member. FIG. 7 is an explanatory view of a configuration in which a closing member is inserted from the upper surface of a cylindrical member as a means for detecting a leaked heat exchange medium according to the present invention, and FIG. FIG. 7B is a view showing the vicinity of the opening of the tubular member and the closing member, and FIG. 7B is a cross-sectional view showing a state where the closing member is fitted into the tubular member. FIG. 8 shows a conventional mechanism in which a heat exchange medium bypasses from one compartment to another compartment when a lateral opening of a tank body is closed by a closing member through a gap between the closing member and the partition. FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The heat exchanger 1 shown in FIGS. 1 and 2 is used, for example, in a vehicle. This is a two-tank laminated evaporator, with tubes 2 and 3 arranged side by side in the ventilation direction, corrugated fins 4 alternately laminated with the tubes 2 and 3 in multiple stages, and on both sides in the laminating direction. A two-pass system composed of end plates 5, 5 arranged, a tank 6 provided at one longitudinal end of the tubes 2, 3 and a tank 7 provided at one end opposite to the tank 6. Method.

As shown in Fig. 2, one of the tubes 2 and 3 is formed by bending a single brazing sheet into a plurality of stages by roll homing or pressing to form a curved section at one end in the ventilation direction. The other end side in the ventilation direction is provided with one heat exchange medium passage 12 by forming a wrapped portion 11. The portion near the opening of the heat exchange medium passage 12 is a tank inlet 13 that can be connected to the following tube connection hole 14 of the tanks 6 and 7. Although not shown in the drawing, in order to improve the agitation of the heat exchange medium, a plurality of inner fins may be provided in the heat exchange medium passage 12 inside the surface perpendicular to the ventilation direction. May be formed.

Then, when the tubes 2 and 3 are arranged side by side in the ventilation direction, the winding portion 11 is arranged so as to be on the upstream side in the ventilation direction of each tube 2 and 3 c. By arranging the tubes 2 and 3 side by side so that 1 is on the upstream side, the upstream side of the tubes 2 and 3 is thickened by the tightened portion 1 1, so that dust and the like blown off from the windward side adhere. Thus, the corrosion resistance against the corrosion caused by the above can be improved, and the life of the tubes 2 and 3 can be prolonged. On the other hand, as shown in FIG. 1, the tank 6 and the tank 7 are made of an aluminum alloy cylindrical body 15 having a tube connection hole 14 for connecting to the tubes 2 and 3. The tubular member 15 is formed by extrusion molding, and is constituted by a closing member 16 or a closing member 20 described below. With such a configuration, for example, due to a poor connection between the deep drawing ink member and the closing member as in a conventional tank including a substantially bowl-shaped deep drawing tank member having one opening and a closing member closing the opening, for example. The heat exchange medium does not leak from the gap at the side of the tank.

The tank 6 closes the openings on both sides by inserting the projections (not shown) of the closing member 16 into the cylindrical body 15 so that the heat exchange medium can be folded back. It has become a folded tank.

The tank 7 is completely separated from the bulkhead 17 extending along the longitudinal direction of the tube 10 into two inlet sides 18 and an outlet side 19 at the center of the inside of the cylindrical body 15. The opening is closed by inserting the protrusion 21 of the closing member 20 into the cylindrical body 15. Although not shown, the inlet side 18 has an inlet side pipe, and the outlet side 1 An outlet pipe is connected to 9 to form an inlet / outlet tank. The partition wall 17 of the tank 3 is formed by extrusion molding, so that the partition wall is a separate member and is directly connected to the inlet side and the outlet side from the gap due to poor joining with the tank inner peripheral surface. The performance of the heat exchanger is not degraded by bypassing the heat exchange medium.

When the heat exchanger 1 is used as an evaporator, the surface of the tanks 6 and 7 is sprayed with zinc (Zn) later, or In the state extruded by layer extrusion, the surface contains zinc. The sacrificial layer is formed to improve the corrosion resistance by a method of forming a layer having the same.

By the way, as shown in FIG. 3, a closing member 20 for closing the opening of the cylindrical member 15 of the tank 7 is used to close both the inlet side portion 18 and the outlet side portion 19. A force having two projections 21 and 21 Between the projection 21 and the projection 21, that is, a partition wall 1 that partitions the entrance side 18 and the exit side 19. A slit hole 22 penetrating through the closing member 20 in the axial direction of the entrance / exit side portions 18 and 19 is formed as a means for detecting the leaked heat exchange medium at a portion facing the end face of 7.

With such a configuration, brazing failure occurs between the closing member 20 and the cylindrical member 15, particularly, the inner peripheral surface of the partition wall 17, and, for example, the heat exchange medium flows from the inlet side portion 18. Even if the heat exchange medium leaks along the poor brazing portion, the leaked heat exchange medium is blocked between the entrance side 18 and the exit side 19 before reaching the exit side 19. Since it flows down and flows out through the slit hole 22 of the member 20, it is possible to easily find the heat exchanger in which the brazing failure has occurred.

Further, as the heat exchange medium detecting means of the closing member 20, instead of the slit hole 22, as shown in FIG. 4, the closing member 20 is formed by two closing members 20 a, 20 a. These closing members 20a and 20a have a predetermined gap when the projection 21 is inserted into the opening of the inlet side portion 18 or the outlet side portion 19. It is good.

With such a configuration, brazing failure occurs between the closing members 20a, 20a and the inner peripheral surface of the tubular member 15, especially the partition wall 17, for example. Even if the heat exchange medium leaks from the mouth part 18 along the above-mentioned brazed portion, the leaked heat exchange medium will not reach the outlet side part 19 before entering the inlet side part 18 and the outlet side. Since it flows down and flows out from the gap between the closing members 20a and 20a between the block 19 and the portion 19a, it is possible to easily find the heat exchanger in which the above-mentioned poor brazing has occurred.

Further, as shown in FIG. 5, instead of the slit hole 22, the heat exchange medium detecting means of the closing member 20 is provided between the protrusion 21 and the protrusion 21, that is, on the inlet side as shown in FIG. The projecting portion 23 is formed by bending a portion facing the end face of the partition wall 17 that separates the portion 18 from the outlet side portion 19 outward in the stacking direction, thereby forming the stacking direction of the projecting portion 23. The groove 24 may be formed inside.

With such a configuration, brazing failure occurs between the closing member 20 and the cylindrical member 15, particularly, the inner peripheral surface of the partition wall 17, and, for example, the heat exchange medium flows from the inlet side portion 18. Even if the heat exchange medium leaks along the poor brazing portion, the leaked heat exchange medium is blocked between the entrance side 18 and the exit side 19 before reaching the exit side 19. Since it flows down and flows out through the groove 24 of the member 20, it is possible to easily find the heat exchanger in which the brazing failure has occurred.

Further, instead of forming the heat exchange medium removing means in the closing member 20, as shown in FIG. 6, the opening side of the entrance / exit sides 18 and 19 of the partition wall 17 of the cylindrical member 15 is provided. The end may be recessed in the axial direction of the entrance / exit sides 18 and 19 to form at least a groove 25 opened downward. With such a configuration, the closing member 20 and the cylindrical member 15, Even if the brazing failure occurs between the inner peripheral surface of the partition wall 17 and the heat exchange medium leaks from the entrance side 18 through the brazing failure portion, for example, the leaked heat exchange medium is However, before reaching the outlet side 19, the brazing defect is caused by the water flowing down from the groove 25 of the cylindrical member 15 existing between the inlet side 18 and the outlet side 19 and flowing out. Can easily find the heat exchanger that caused the heat.

On the other hand, in FIG. 7, elongated elongated holes 26, 26 having dimensions equal to the widths of the inlet side 18 and the outlet side 19 in the ventilation direction are formed on the upper surface near the opening of the cylindrical member 15. However, a thin plate-shaped closing member 20b is inserted into the elongated hole 26.

With this configuration, even if a brazing defect occurs between the peripheral surface of the cylindrical member 15 and the closing member 20, the heat exchange medium flows out of the heat exchanger from the opening side of the compartment. Therefore, the heat exchanger in which the above-mentioned brazing failure has occurred can be easily found. Industrial applicability

As described above, according to the present invention, the heat exchange medium leaks from one compartment to the other between the compartments of the tank in the middle of the flow path in the flow path to the other compartment or to the closing member. The provision of the heat-exchange-medium detection means for allowing the heat-exchange medium to flow out of the heat exchanger results in poor brazing between one compartment and the tank side surface of the closing member. Since it also flows out of the heat exchanger from the heat exchange medium detection means toward the compartment, it is possible to confirm in advance the leakage of the heat exchange medium by testing, etc. Such a defective heat exchanger can be prevented from flowing out to the market.c Also, according to the present invention, an opening is provided in the vicinity of the opening on the peripheral surface of the compartment so as to open radially to the compartment. By inserting the closing member into this opening, even if a brazing failure occurs between one compartment and the side surface of the closing member, the outside of the heat exchanger is opened from the opening of the compartment. Since the heat exchange medium flows out, it is possible to confirm the leakage of the heat exchange medium in advance in a test or the like, thereby preventing such a defective heat exchanger from flowing out to the market. .

Furthermore, since the tank is integrally formed by extrusion molding, even in the tank having a plurality of compartments in the ventilation direction, the partition for separating the compartments from the compartments is integrally formed, so that one compartment and another compartment are formed. There is no direct bypass of the heat exchange medium with other compartments.

By arranging the tube so that the tube-tightened portion is located on the upstream side in the ventilation direction, the tube-tightened portion becomes thicker on the upstream side of the tube. The corrosion resistance against the resulting corrosion can be improved, and the life of the tube can be extended.

Claims

The scope of the claims

1. A tube having a heat exchange medium passage therein, fins alternately stacked with the tube, and a bin arranged on at least one side of the tube, and the tank is arranged in a ventilation direction. In a heat exchanger having a plurality of compartments that are arranged in parallel and open on the side along the ventilation direction, and the opening of the compartment is closed by a closing member,

A heat exchange medium that causes the heat exchange medium to flow out of the heat exchanger between the compartments of the tank and the compartment or in the closing member in the middle of the flow path where the heat exchange medium leaked from one compartment flows to the other compartment. A heat exchanger characterized by providing means.

2. As the heat exchange medium detecting means, a slit hole that penetrates the closing member in the axial direction of the opening of the tank is provided in a portion of the closing member between the opening and the opening of the tank. 2. The heat exchanger according to claim 1, wherein:

3. The heat exchanger according to claim 1, wherein, as the heat exchange medium detecting means, each opening of the tank is closed with a different closing member, and a gap is provided between adjacent closing members.

4. As the heat exchange medium detecting means, a groove portion is provided inside the stacking direction by projecting a portion of the closing member between the openings of the tank to the outside in the stacking direction. The heat exchanger according to claim 1, wherein

5. The heat exchanger according to claim 1, wherein, as the heat exchange medium detecting means, a groove portion is provided by depressing a portion of the tank between the compartments inward in the stacking direction.

6. A tube having a heat exchange medium passage therein, fins alternately stacked with the tube, and a bin arranged on at least one side of the tube, and the tank is arranged in a ventilation direction. In a heat exchanger having a plurality of compartments that are arranged in parallel and open on the side along the ventilation direction,

A heat exchange medium that causes the heat exchange medium to flow out of the heat exchanger between the compartments of the tank and the compartment or in the closing member in the middle of the flow path where the heat exchange medium leaked from one compartment flows to the other compartment. A heat exchanger, comprising: means for providing an opening, which is provided in the vicinity of an opening on the peripheral surface of the compartment, and which is radially opened with respect to the compartment, and a closing member is fitted into the opening.

7. A tank that allows the heat exchange medium to be turned back from a heat exchange medium passage communicating with one compartment to a heat exchange medium passage communicating with another compartment on the side of the tube opposite to the side where the tank is disposed. The heat exchanger according to claim 1, 2, 3, 4, 5, or 6, wherein the heat exchanger is arranged separately.

8. The tank according to claim 1, wherein the tank is formed integrally by extrusion molding. Heat exchanger.

9. The tube according to claim 1, wherein, when the tube has a crimped portion on the side along the short direction, the crimped portion is arranged on the upstream side in the ventilation direction. The heat exchanger according to claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, or claim 8.