JPH04122979U - Heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the labor involved in manufacturing heat exchangers and reduce manufacturing costs. [Structure] A locking recess 17 is formed on the outer circumferential surface of the end of the fluid supply/discharge pipe 16. After inserting this fluid supply/discharge pipe 16 into the fluid supply/discharge port 15 of the tank 8 , a part of this fluid supply/discharge port 15 is crimped toward the locking recess 17 , and the fluid supply/discharge pipe 16 is connected to the tank 8 . support.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed to improve heat exchangers used as evaporators in automobile air conditioners. Regarding good.

0002

[Conventional technology]

Built into an air conditioner, it evaporates the refrigerant inside and controls the air flowing outside. As a cooling evaporator, a heat exchanger having a structure as shown in Fig. 5 is used, for example, in As shown in Japanese Patent No. 2-169127, this has been known for a long time.

0003 This conventional heat exchanger has a pair of protrusions 1a and 1b spaced apart from each other on one end edge. A U-shaped recess 3 is formed on one side of the metal plate 2, and both ends of the recess 3 are The protrusions 1a and 1b are formed so as to be continuous up to their edges. Inside of the recess 3 A large number of protrusions 4, 4 are formed in the recess 3, which corresponds to a heat exchanger tube. , disturbs the flow of fluid such as refrigerant flowing inside the folded channel 5, and causes the fluid and the metal plate to This ensures efficient heat exchange between the two.

0004 The metal plates 2, 2 as described above are made into a set of two, with their recesses 3 facing each other. By overlapping each other in the middle and liquid-tightly joining each other, a U-shaped folded flow is created. A channel 5 and a pair of joints 6a, 6 located at both ends of the channel 5 and protruding from the edge. It is assumed that element 7 has b.

[0005] Then, the joint portions 6a and 6b of each of the plurality of elements 7 are connected to a pair (one pair in FIG. 5). (Only shown) In the slit-shaped connection holes 9, 9 formed on the sides of the tank 8, At the same time, align the outer circumferential surfaces of the joints 6a and 6b with the inner circumferential edges of the connection holes 9 and 9. This is a liquid-tight brazing joint. The tank 8 has a seat plate 10 and a tank body 11 in the middle. It is constructed by combining them in a shape and brazing each other liquid-tightly, , 9 are formed on the bottom surface of the seat plate 10. Along with this, between the adjacent elements 7 Fins (not shown) are provided.

[0006] Among the pair of tanks 8, one of the tanks 8 has a partition wall 1 fixed to the middle part. 2, it is divided into an inlet chamber 13 and an outlet chamber 14, and the flow is directed to the inlet chamber 13 side. A fluid supply/discharge port 15 that functions as a body inlet is placed on the side of the outlet chamber 14 that functions as a fluid outlet. Separate fluid supply and discharge ports (not shown) are provided for each.

[0007] In the case of a heat exchanger configured as described above, fluid such as refrigerant is sent from the fluid supply/discharge port 15. Once in, this fluid passes from the inlet chamber 13 through the folded channels 5 of some of the elements 7. It enters another tank and passes from this another tank through the folded passage 5 of the remaining element 7. The liquid reaches the outlet chamber 14 of one of the tanks 8, and then flows out from another fluid supply/discharge port. Ru.

[0008] By the way, as shown in FIG. 6, the fluid supply/discharge port 15 (and other fluid supply/discharge ports) , a fluid supply/discharge pipe 16 is connected to transfer fluid such as refrigerant to this fluid supply/discharge port 15. The end of the tube can be freely connected.

[0009] That is, a fluid supply/discharge pipe 16 with a beveled end is inserted into the fluid supply/discharge port 15 to a predetermined length. At the same time, the inner circumferential edge of the fluid supply/discharge port 15 and the outer circumferential surface of the fluid supply/discharge pipe 16 and are liquid-tightly brazed.

0010 The reason why the end of the fluid supply and discharge pipe 16 is cut diagonally is when the fluid supply and discharge pipe 16 is inserted into the tank 8. After securing the amount L, before brazing the tank 8 and the fluid supply/discharge pipe 16, This is to prevent them from leaving each other.

[0011]

[Problem that the idea aims to solve]

However, in conventional heat exchangers, it is difficult to cut the ends of the fluid supply and discharge pipes 16 at an angle. This was troublesome and caused the manufacturing cost of the heat exchanger to increase.

0012 Also, after inserting the fluid supply/discharge pipe 16 into the fluid supply/discharge port 15, the tank 8 and the fluid supply/discharge pipe are connected. The insertion amount L of this fluid supply/discharge pipe 16 is maintained at a predetermined value until the fluid supply/discharge pipe 16 is brazed. In order to As a result, the manufacturing process increases, which increases the manufacturing cost of the heat exchanger. It was.

[0013] The heat exchanger of the present invention eliminates the above-mentioned disadvantages.

[0014]

[Means to solve the problem]

The heat exchanger of the present invention, like the conventional heat exchanger described above, has many heat exchanger tube equivalent parts. A tank is provided at the end of the core consisting of It consists of inserting a fluid supply and discharge pipe into the tank through the fluid supply and discharge port. .

[0015] Furthermore, in the heat exchanger of the present invention, a locking recess is provided on the outer peripheral surface of the end of the fluid supply and discharge pipe. At the same time, a part of the part fixed to the fluid supply/discharge port is directed toward this locking recess. It is characterized by being caulked.

[0016]

[Effect]

The heat exchanger of the present invention has a locking recess formed on the outer peripheral surface of the end of the fluid supply and discharge pipe as described above. Support the fluid supply/discharge pipe by caulking a part of the fixed part to the fluid supply/discharge port. In order to There is no need for additional welding.

[0017]

【Example】

The heat exchanger of the present invention is similar to the conventional heat exchanger described above, as shown in FIG. As shown in 1, a core consisting of many heat exchanger tube equivalent parts such as folded channels 5 and fins. A tank 8 is provided at the end of the section, and fluid is supplied through a fluid supply/discharge port 15 formed on the side of the tank 8. It is constructed by inserting a fluid supply/discharge pipe 16 into the tank 8.

[0018] In addition, as shown in FIG. 1, a plurality of (in the illustrated example) 2) locking recesses 17 are formed. The end of this fluid supply and discharge pipe 16 should be cut obliquely. It is cut along a plane perpendicular to the axis. Then, this fluid supply/discharge pipe 16 After inserting the end into the fluid supply/discharge port 15, the end of the fluid supply/discharge port 15 is inserted into the above-mentioned engagement. The portions that align with the locking recesses 17 are caulked inward to form locking protrusions 18, 18. . In addition, in FIG. 1, for the sake of explanation, the fluid supply and discharge port 15 is shown before the fluid supply and discharge pipe 16 is inserted. , forming locking protrusions 18, 18.

[0019] As described above, the fluid supply/discharge port 15 is opened toward the locking recess 17 on the outer circumferential surface of the end portion of the fluid supply/discharge pipe 16. By caulking, the locking protrusions 18, 18 are formed, and the fluid supply/discharge port 15 and the flow are connected. Even if spot welding or the like is not performed between the fluid supply and discharge pipe 16 and the fluid supply and discharge pipe 16, It is firmly supported within the supply/discharge port 15.

[0020] In addition, as shown in FIG. , and the locking protrusions 19 abut against the opening edge of the fluid supply/discharge port 15 . If it is, the amount of insertion of the fluid supply/discharge pipe 16 into the fluid supply/discharge port 15 can be easily and reliably regulated. It can actually be done.

[0021] Furthermore, as a structure for supporting the fluid supply/discharge pipe 16 inside the fluid supply/discharge port 15, the structure shown in FIG. As in the second embodiment shown in 3 and 4, a locking tongue piece 20 is attached to the end edge of the fluid supply/discharge port 15, 20 is formed protrudingly, and a locking recess 21 is formed on the outer peripheral surface of the end portion of the fluid supply/discharge pipe 16. 21, and bend the locking tongues 20, 20 toward the locking recesses 21, 21. It is also possible to have a structure in which it is attached.

[0022]

[Effect of the idea]

Since the heat exchanger of the present invention is constructed and operates as described above, fluid is supplied to and discharged from the tank. The work of installing pipes can now be done easily, reducing the manufacturing cost of heat exchangers. Ru.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of essential parts showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of essential parts showing an application example.

FIG. 3 is an exploded perspective view of essential parts showing a second embodiment.

FIG. 4 is a sectional view taken along line AA in FIG. 3, shown in an assembled state.

FIG. 5 is an exploded perspective view of essential parts of an example of a heat exchanger to which the present invention is applied.

FIG. 6 is a sectional view of main parts showing a conventional structure.

[Explanation of symbols]

1a Projection 1b Projection part 2 Metal plate 3 Recess 4 Protrusion 5 Folded channel 6a Joint part 6b Joint part 7 elements 8 Tank 9 Junction hole 10 Seat board 11 Tank body 12 Bulkhead 13 Entrance room 14 Exit chamber 15 Fluid supply/discharge port 16 Fluid supply and discharge pipe 17 Locking recess 18 Locking protrusion 19 Locking protrusion 20 Locking tongue piece 21 Locking recess

Claims (1)

[Scope of utility model registration request] [Claim 1] A tank is provided at the end of a core portion consisting of a large number of heat transfer tube equivalent parts and fins, and a fluid supply/discharge pipe is inserted into the tank through a fluid supply/discharge port formed on a side surface of the tank. In the heat exchanger, a locking recess is formed on the outer circumferential surface of the end of the fluid supply/discharge pipe, and a part of the part fixed to the fluid supply/discharge port is caulked toward the locking recess. Features of heat exchanger.