JPH0624712Y2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a heat exchanger having a tank portion into and out of which refrigerant flows in and out of one end of a plurality of laminated tubes.

(Prior Art) Generally, in a heat exchanger such as a heater core, a forward path and a return path of a refrigerant are formed in a tube, and an inlet and an outlet are provided in the outward path and the return path on one end side of the tube. A plurality of tubes are stacked via fins, and one end side of these stacked tubes is connected to a tank part having the inside formed in an inlet side tank part and an outlet side tank part.

Conventionally, the tank part was made of resin, and the insertion part of each tube into the tank part was sealed by a rubber seal, but when used in a high temperature area, the resin tank part or the rubber seal is used. However, in recent years, each member of the tank has tended to be formed of aluminum.

In a heat exchanger having such an aluminum tank part, the tank part includes an end plate having an insertion hole for each tube end, a tank joined to the end plate, and an inside tank part inside the tank. It is composed of a partition plate for partitioning to the outlet side tank part, and each tube and the tank part are joined by various joining structures.

For example, the tank portion including the end plate, the tank, and the partition plate may be integrally molded, and the tube may be fitted into the tank portion through the partition wall at the other end of the tube or the cut groove formed in the partition plate of the tank portion. (Actual No. 62-131268), the end plate of the tank part, the tank and the partition plate are formed by separate members, and the tube is joined by forming the partition plate at the other end of each tube or fitting the partition plate into the cut groove. (Japanese Patent Laid-Open No. 62-15
No. 3685), the tank portion is integrally formed, and the partition grooves at the other end of each tube and the cut grooves provided in both the partition plates of the tank portion are fitted and joined to each other.

(Problems to be solved by the invention) However, in the above, in order to provide the insertion hole and the cut groove, the partition wall of the tube and the partition plate of the tank portion must be provided so as to be in contact with each other, There is a problem that high processing accuracy is required and the manufacturing cost increases.

Further, in the above, similarly to the above, high processing accuracy of the insertion hole and the kerf is required, and since the tank part is composed of a separate member, the end plate, the tube, and the partition plate are brazed at three points. Will be done. In the three-point brazing, it is difficult to make the brazing parts coincide with each other, and thus it is difficult to braze and to braze.

Further, in the above, since the cut grooves are formed in both the tube and the partition plate, very high dimensional accuracy is required, and if the dimensions are slightly misaligned, the tube inlet and outlet may communicate with each other. It was

Therefore, an object of the present invention is to provide a heat exchanger that does not have a kerf and is easy to process without using three-point brazing.

(Means for Solving the Problems) In the heat exchanger of the present invention, a tube having an outward path and a return path of a refrigerant partitioned by a partition wall and having an inlet and an outlet of the refrigerant on one end side is alternately laminated with fins. A heat exchanger in which a tank having an inlet side tank portion communicating with the inlet and an outlet side tank portion communicating with the outlet is connected to one end side of the laminated tubes, wherein the tank is An end plate having an insertion hole through which one end side of each of the tubes is inserted, and at least the aforesaid abutting end face of the inlet port or the outlet port including at least the partition wall end face of each tube one end side end face inserted in the insertion hole A sub-plate having a communication hole communicating with the inflow port or each outflow port, a tank joined to the end plate and defining a tank portion together with the end plate, and a flow of the tube. A partition plate that partitions the inside of the tank into an inlet tank portion that communicates with the inlet and an outlet tank portion that communicates with the outlet of the tube,
It is configured by.

(Operation) When the tube is assembled to the tank, if one end side of the tube is inserted into each insertion hole of the end plate, the end face of the inlet or the outlet including at least the partition wall end face of the end face of each tube is The end face of one end of the tube that contacts the plate is joined to the sub plate by integral brazing, and at least the inlet or the outlet on the one end of each tube is a communication hole on the inlet side or outlet side of the sub plate. Through the partition plate to communicate with the inlet-side tank portion or the outlet-side tank portion, and the other outlet-side tank portion or the inlet-side tank portion through the outlet-side or inlet-side communication hole of the sub-plate or directly. Communicated.

Therefore, as the insertion hole provided in the end plate,
There is no need to have an accurate shape corresponding to the cross section of the tube, and the communication hole of the sub-plate may be connected to at least the inflow port and / or the outflow port, so the machining accuracy of the insertion hole and the communication hole is not so required. , Easy to manufacture.

(Example) Below, one Example of this invention is described based on drawing.

As shown in FIG. 1, in the heat exchanger 1 of this embodiment, flat tubes 2 and wavy fins 3 are alternately laminated so that the flat tubes 2 are parallel to each other.
Is a one-sided tank type in which the tank portion 4 is connected to one end side thereof. In the figure, 5 is a flat tube 2 arranged in parallel.
The other end side end plates that support the other end side of the, and 6 and 7 are side plates.

Further, in the heat exchanger 1 of the present embodiment, each member is formed of aluminum, and each flat tube 2 has the other end closed by a press as shown in FIGS. 2 and 3. A partition wall 9 is provided at the center of the tube from the one end side to the middle of the other end side by pressing. The partition wall 9 divides the inside of the tube 2 into a forward path 11 and a return path 12 for the refrigerant, and a U-shaped flow path is formed on the other end side from the forward path 11 to the return path 12 in a U shape, and is formed on one end side end surface. An inflow port 13 and an outflow port 14 are provided.

As shown in FIGS. 4 and 5, the tank portion 4 has
It is composed of an end plate 16, a sub plate 19, a partition plate 22, and a tank 23. The end plate 16 has an outer edge wall 16a protruding from the periphery thereof, into which the tank 23 is fitted, and a step portion 17 into which the sub plate 19 is fitted is formed inside. Also, the end plate 1
6 is an insertion hole 18 through which the other end of each flat tube 2 is inserted.
Are provided corresponding to the arrangement of the tubes 2. Further, the end faces of the flat tubes 2 inserted into the insertion holes 18 of the end plate 16 are brought into contact with the sub plate 19, and the sub plates 19 can communicate only with the inflow port 13 and the outflow port 14, respectively. Communication holes 20 and 21 of various sizes are provided corresponding to each flat tube 2. Further, as shown in FIG. 6 and FIG. 7, the end surface of the partition plate 22 that partitions the one communication hole 20 of the sub-plate 19 and the other communication hole 21 is located between the two communication holes 20 and 21. It abuts on the plate 19. The partition plate 22 has a projection provided on the surface opposite to the contact surface fitted and supported in a recess provided in the tank 23.
2, the inside of the tank portion 4 communicates with the inlet 13, and the outlet tank 26 communicates with the inlet 13 and the outlet 14.
The tanks 25 and 26 are joined to the unions 27 and 28, respectively. Then, as shown in FIG. 4 and FIG. 6, by assembling these members and performing integral brazing, the end plate 16 and the tank 23, the end plate 16 and the sub plate 19, the sub plate 19 and the tube. 2 end face, sub-plate 19
The end faces of the partition plate 22 and the partition plate 22 are integrally brazed.

In this way, the end plate is provided with a tube insertion hole, the sub-plate is provided with a communication hole that communicates with each of the tube inlet and outlet, and the tube end face abuts on this sub-plate. It is possible to join the end plate and the sub plate or the end face of the tube and the sub plate by two-point brazing without the need to provide a kerf, and the tube can be abutted to position the tube for positioning. It will be easy. In addition, since the insertion hole of the end plate does not have to be matched to the cross-sectional shape of the tube, it is easy to process, and the communication holes of the sub-plate can be made by contacting the tube end surface around the hole, so the accuracy of hole processing is high. It is possible to reduce the manufacturing cost without much demand.

In the above embodiment, the partition plate is constituted by an independent component, but as shown in FIGS. 8, 9 and 10, it may be integrated with the sub plate.

In the embodiment shown in FIG. 8, the sub-plate 19 and the partition plate 22 are integrally formed by extrusion molding or the like, which has the same effect as that of the above-mentioned embodiment and the number of parts can be reduced.

In the embodiment shown in FIGS. 9 and 10, the plate width of the sub plate 19 is reduced to approximately half and the partition plate 22 is integrally formed. That is, it is formed on the sub-plate 19 having a plate width that abuts on the end face around the inflow port 13 or the outflow port 14 on one end side of the tube. In this case, the tube width including the partition wall 9 portion of the tube end surface is formed so as to be able to contact the tube end surface, and the same effect as that of the above-described embodiment is obtained.

In addition, in the above-mentioned three embodiments, the description has been made on the premise that the partition wall is formed halfway on the other end side as the tube and the refrigerant is U-turned from the outward path to the return path on the other end side of the tube. Instead, it can be applied to the following heat exchangers. That is, a partition wall is formed over the entire other end side of the tube, and a concave portion that bulges outward by press working is formed on the other end side end plate provided on the other end side of the tube. The heat exchanger may have a structure in which the outward path and the return path communicate with each other.
In this case, the structure of the recess may be formed so as to independently communicate the forward path and the return path for each tube, or may be formed so as to communicate the forward path and the return path of all the tubes. Good.

(Effects of the Invention) As described above, according to the present invention, the tube and the tank portion are joined together with the tube end portion being inserted into the insertion hole of the end plate and the tube end surface being in contact with the sub plate. Since they are joined by brazing, the respective parts can be joined securely by two-point brazing, and the deterioration of the performance due to liquid leakage or the like can be prevented. Also, as the tube insertion hole and communication hole,
The machining accuracy is not so required, and the conventional kerf is not required, which facilitates the machining.

[Brief description of drawings]

1 to 6 relate to an embodiment of the present invention, FIG. 1 is a perspective view of a heat exchanger, FIG. 2 is a plan view of a tube, and FIG.
The figure shows the end face of the tube as viewed in the direction of arrow III in FIG. 2, FIG. 4 is a partially cutaway perspective view showing the joined state of the tube and the tank portion, and FIG. 5 is an exploded perspective view of the heat exchanger. Is a plane cross-sectional view of the joint between the tube and the tank, and FIG.
VII-VII arrow sectional view, FIG. 8 is a perspective view showing a sub-plate according to another embodiment of the present invention, FIGS. 9 and 10 are related to another embodiment of the present invention, and FIG. Fig. 10 is a perspective view of the sub-plate, and Fig. 10 is a plan sectional view of the joint portion. DESCRIPTION OF SYMBOLS 1 ... Heat exchanger, 2 ... Tube 4 ... Tank part, 11, 12 ... Passageway 13, 14 ... Refrigerant forward and return routes 16 ... End plate 18 ... Insertion hole, 19 ... Sub-plate 20 , 21 ... Inlet side communication hole and outlet side communication hole 22 ... Partition plate, 23 ... Tank 25, 26 ... Inlet side tank part and outlet side tank part

Claims (1)

[Scope of utility model registration request] 1. An inlet-side tank communicating with the inflow port, wherein tubes having an outflow path and a return path for the refrigerant, which are partitioned by partition walls, and having an inflow port and an outflow port for the refrigerant at one end side are alternately stacked with fins and communicate with the inflow port. In a heat exchanger in which a tank having a portion and an outlet-side tank portion that communicates with the outlet is connected to one end side of the stacked tubes, the tank has an insertion hole through which one end side of each tube is inserted. And an end plate that has at least one end surface of each tube inserted into the insertion hole and is in contact with the end surface of the inlet or the outlet including at least the partition wall end surface, and communicates with at least the inlet or the outlet. A sub plate having a communication hole; a tank joined to the end plate to define a tank portion together with the end plate; and the tank connected to the inlet of the tube. Heat exchangers, wherein a partition plate, by being configured by partitioning into the outflow-side tank portion communicating with the outlet of the tube and the inlet-side tank portion for.