JPH05272889A - Heat exchanger - Google Patents

Abstract

PURPOSE:To prolong the life of press die and reduce the costs by simplifying the stamping operation of a hole in the partition of a header. CONSTITUTION:A header 12 of a refrigerant condenser is divided by a partition 17 into two passages 18 and 19. The partition 17 consists of separators 26 and 27 and a hole 28 formed in a tank header 12a. The separators 26 and 27 are provided with positioning projections 26a and 27a engageable with the tank header 12a, respectively. The nearly H-shaped hole 28 is provided with locking holes 28a and 28b for receiving the positioning projections 26a and 27a respectively and a communicating hole 28c connecting these locking holes. Since the hole 28 is so dimensioned as to be made relatively larger as required and easily stamped out by a single press working, the press die life can be prolonged and the cost can be reduced as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a header joined to the ends of a plurality of tubes, and a first flow path through which the heat exchange medium flowing into the tubes flows out of the header and the tubes. The present invention relates to a heat exchanger including a partition section that divides a second flow path through which a heat exchange medium flows.

[0002]

2. Description of the Related Art As a heat exchanger of this type, for example, a refrigerant condenser (condenser) used in a refrigeration cycle is provided. That is, this is composed of the first and second headers and a plurality of tubes connecting them,
A separator is provided inside the first header, thereby partitioning the first header internal space into an inflow passage and an outflow passage of the refrigerant.

Refrigerant entering the inflow passage from the outside through the refrigerant inlet of the first header flows into the second header through the tube connected to the first header, and flows from the second header into the second header through the tube. It enters the outflow passage of the header No. 1 and flows out to the outside from the refrigerant outlet.

In such a structure, the header is formed by joining a semi-cylindrical tank header and a plate header into a cylindrical shape. In this case, the tank header is formed with a hole that engages with the separator, and is formed by joining the separator with the plate header while the separator is engaged with the hole.

By the way, if the separator is not properly joined when the header is formed, a leak will occur between the inflow path and the outflow path, and it is necessary to inspect it. With such a configuration, the inspection cannot be easily performed.

Therefore, conventionally, as a structure for detecting a defective joint of the separator, a structure as shown in FIGS. 10 to 13 is provided. That is, in FIG. 10 and FIG. 11, two headers 2 and 3 are provided inside the header 1 at a predetermined interval, and the peripheral wall of the header 1 partitioned by these separators 2 and 3 is connected to the outside. An inspection hole portion 1a for communication is formed.

In this case, as shown in FIG. 12, the tank header 4 constituting the header 1 is provided with engaging hole portions 5 and 6 corresponding to the engaging protrusions 2a and 3a of the separators 2 and 3, respectively. The inspection hole 1a is formed at an intermediate portion between them.

With such a structure, for example, when the separator 2 is defectively joined to the header 1 at the lower end as shown in FIG. 13, when gas is sent from the left side of the header 1, After passing through the separator 2 in which the bonding failure has occurred (path indicated by arrow A), the gas leaks from the hole 1a to the outside (path indicated by arrow B). Therefore, this hole 1
By detecting whether or not the gas is flowing out from a, it is possible to easily inspect the joint failure.

[0009]

In order to have the above-mentioned structure, the header 1 is provided with the engaging holes 5 and 6 and the hole 1a for inspection as shown in FIG. It is necessary to form three of them side by side. However, in press working, when forming a small hole, since the punch has a limit in strength, the life of the mold is significantly reduced depending on the plate thickness, so it is necessary to use a special metal mold. is there.

Therefore, when the three small holes are formed close to each other as described above, not only the number of times of machining is increased, but also machining accuracy is required and the mold life cannot be shortened. There is a problem that the processing cost becomes high as a whole.

The present invention has been made in view of the above circumstances, and an object thereof is to make a shape of a hole portion formed in a header for detecting a defective joint of a partition portion simple and easy to machine. It is an object of the present invention to provide a heat exchanger capable of extending the service life of the mold and suppressing the processing cost to a low level.

[0012]

According to the present invention, there are provided a header joined to the ends of a plurality of tubes, a first flow path through which a heat exchange medium flowing into the tubes flows, and the tubes. Second outflowing heat exchange medium
Is intended for a heat exchanger having a partition part which is partitioned into the flow path of, and the partition part is constituted by two plate parts arranged in a state in which a space part exists between each other, The header peripheral wall portion is characterized in that an engagement hole portion for mounting the plate portion and a communication hole portion for communicating the space portion with the outside of the header are formed in a state of being connected to each other.

[0013]

According to the heat exchanger of the present invention, when the header is manufactured, the engaging hole portion and the communicating hole portion for the two plate portions of the partition portion are formed in a state of being connected to each other. Can be formed at the same time as a large hole, which facilitates processing in press working, and since it is not necessary to use a mold for processing with a small hole, the life can be extended and the cost can be reduced as a whole. Can be achieved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a refrigerant condenser of a refrigeration cycle will be described below with reference to FIGS. FIG. 4 shows a schematic configuration of the refrigerant condenser. In FIG. 4, the refrigerant condenser 11 is composed of two headers 12 and 13 and a core 14 connected between them.

The header 12 comprises a tank header 12a and a plate header 12b, both of which have a semi-cylindrical shape, fixed in a cylindrical shape. The end plate 1 is attached to both ends of the header 12.
5, 16 are fixed in a sealed state by brazing or soldering. Further, a partition portion 17 described later is formed in the middle portion of the header 12, and thereby the header 12 is divided into a first flow path 18 and a second flow path 19.

An inlet pipe 20 through which a refrigerant as a heat exchange medium flows into the header 12 is connected to the end of the first flow path 18 of the header 12, and the header 12 is connected to the end of the second flow path 19. An outlet pipe 21 for flowing out the inside refrigerant is connected. The inlet pipe 20 is connected to a compressor of a refrigeration cycle (not shown), and the outlet pipe 21 is connected to the cooler side.

The header 13 is formed by fixing a tank header 13a and a plate header 13b, both of which have a semi-cylindrical shape, in a cylindrical shape, and end plates 22 and 23 are brazed or soldered at both ends thereof. It is fixed in a sealed state.

On the other hand, the core 14 has a plurality of flat tubular tubes 1 between the side plates 24 and 25 provided above and below.
4a and corrugated fins 14b are arranged in a stack at a predetermined pitch. The corrugated fins 14b are formed by bending a band-shaped ultra-thin plate material in a wave shape, and are joined to the tube 14a by brazing or soldering to enhance the heat dissipation efficiency.

The headers 12 and 13 are connected to each other via the core 14, and the refrigerant condenser 11 has the headers 12 and 13 and the refrigerant as a heat exchange medium. A circulation path is formed via the tube 14a.

1 and 2, the partition 1 of the header 12 is shown.
7 parts are shown, and two separators 2 as a plate part
Reference numerals 6 and 27 denote plates having the same shape as the cross section of the inner peripheral wall of the header 12, and the engaging protrusions 26 for positioning the header 12 respectively.
a and 27a are formed. Also, the tank header 12
A hole 28 is formed in the portion a corresponding to the partition 17.

The hole 28 is substantially H-shaped as shown in the plan view of FIG. 3, and is located at a predetermined interval corresponding to the engaging protrusions 26a and 27a of the separators 26 and 27. And engaging holes 28a and 28b formed in the header 12, and communication holes 28c located between them for communicating the inside and outside of the header 12.

The two separators 26 and 27 are
The engaging protrusions 26a and 27a are respectively attached to the tank header 12.
In a state of being engaged with the engaging hole portions 28a, 28b of a, it is arranged inside the header 12 formed by the tank header 12a and the play and header 12b, and is fixed by brazing or soldering. Thereby, the space S is formed between the separators 26 and 27 inside the header 12, and the space S and the outside are communicated by the communication hole 28c of the hole 28.

In this case, since the hole 28 is in a state in which the engaging holes 28a, 28b and the communication hole 28c are connected to each other as described above, it is larger than the case where each of them is formed independently. It can be formed as a hole, and can be easily formed in the tank header 12a by a single press punching process.

According to this embodiment, the header 12
When the partition portion 17 is formed by joining to the tank, the tank header 12a of the separators 26 and 27 or the plate header 1
2B is inspected for the quality of the joining state, and if there is a defective joining at that time, the inspection gas is the communication hole 2 of the hole 28.
Since it flows out to the outside via 8c, it is possible to judge the defective connection by detecting this.

Since the communication hole portion 28c as described above can be formed as the hole portion 28 connected to the engagement hole portions 28a and 28b by one press punching step, the working step becomes easy and The life of the mold of the processing machine can be extended, and the cost can be reduced as a whole.

In the above embodiment, the case where the hole 28 has a substantially H-shape has been described, but the invention is not limited to this, and the communication hole 28c may have an H-shape formed by a linear shape. Alternatively, various modifications are possible, such as the communication hole 28c may be formed in a U shape in which the communication hole 28c is arranged closer to one end side.

FIG. 5 and FIG. 6 show the second embodiment of the present invention, and the portions different from the first embodiment will be described below. That is, the separator unit 2 as a partition part
9 is the two separators 26, 2 in the first embodiment.
The plate portions 30 and 31 corresponding to No. 7 are integrally formed by the connecting plate 29a at the portions corresponding to the engaging protrusions. On the other hand, the tank header 12a has a rectangular hole 3 through which the connecting plate 29a of the separator unit 29 can be inserted.
2 is formed.

The separator unit 29 includes a connecting plate 29a.
The part is inserted into the hole 32 of the tank header 12a and fixed to the inner wall surfaces of the tank header 12a and the plate header 12b by brazing or soldering.

As a result, a space S surrounded by the separator unit 29 is formed inside the header 12.
Further, the connecting plate 2 of the separator unit 29 is provided in the hole 32.
A communication hole 32a for communicating the space S with the outside of the header 12 is formed in a portion excluding the portion 9a. Therefore,
With this communication hole portion 32, it is possible to easily inspect the separator unit 29 for a defective joint as in the first embodiment.

Further, according to this embodiment, the separator 3
By using the separator unit 29 in which 0 and 31 are integrally formed, the handling at the time of assembly is simplified, and
By making the hole 32 into a rectangular shape, hole processing is further simplified.

FIGS. 7 and 8 show a third embodiment of the present invention. The difference from the second embodiment is that the separator unit 29 is used in place of a separator unit 33 as a partition. ..

That is, the separator unit 33 is formed by a single plate in which two separators 34, 35 are integrally connected by a connecting plate 36 having a width dimension substantially the same as the diameter of the two separators 34, 35. The shape of 37 also has a large width corresponding to the shape of the connecting plate 36. In this case, the height dimension of the separator unit 33 is determined by the header 12
It is made smaller so that it is located at approximately the same position as the outer peripheral wall.

As a result, the separator unit 33 is
After the tank header 12a and the plate header 12b are joined to each other to form the header 12, the tank header 12a and the plate header 12b can be attached by inserting them through the holes 37 and joining them. Therefore, the second
In addition to the effect of the embodiment described above, there is an advantage that the process of assembling and joining is further simplified, and since the height dimension of the separator unit 33 can be reduced, the dimension of the protruding portion of the header 12 can be reduced. There is an advantage that

FIG. 9 shows a fourth embodiment of the present invention. The difference from the first embodiment is that the tank header 12
A is being divided into first and second tank headers 38 and 39 corresponding to the first flow path 18 and the second flow path 19. Each of the tank headers 38, 39 has a T-shaped notch 40 formed at the center of the end. The notch 40 has an engagement hole 40a corresponding to the engagement protrusion 41a of the separator 41 and an opening 40b connected to the engagement hole 40a.
It depends on and.

With the separators 41 engaged with the notches 40 at both ends of the tank headers 38 and 39,
The header 12 is formed by being joined to the plate header 12b. At this time, by forming the tank headers 38 and 39 so as to be in close contact with each other, two adjacent notch portions 4 are formed.
The 0 openings 40b are connected to each other to form a communication hole. Further, in this case, the separator 41 is also used as the end plate of the header 12 and can be used in common.

According to the fourth embodiment as described above, the same effects as those of the first embodiment can be obtained, and the types of parts and the types of processing can be reduced, so that the cost can be further reduced. it can.

In each of the above embodiments, the header 12
Although the case where the partitioning portion is formed at one place has been described above, the present invention is not limited to this, and may be applied to, for example, a configuration in which the first and second headers are provided at a plurality of places to increase the flow paths.

In each of the above embodiments, the case where the present invention is applied to the refrigerant condenser has been described, but the present invention is not limited to this, and for example, a gas such as a refrigerant evaporator, a heater core, a radiator, an oil cooler or an intercooler. -It can be applied to a gas heat exchanger, a gas-liquid heat exchanger or a liquid-liquid heat exchanger.

[0039]

According to the heat exchanger of the present invention, the engaging hole portion and the communicating hole portion are formed in the header peripheral wall portion of the two plate portions constituting the partition portion in a state of being connected to each other. Therefore, as compared with the case where each of them is formed independently, the processing becomes simpler, and the size can be increased as a whole, so that there is an excellent effect that the life of the processing die can be extended.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of a main part

FIG. 3 is a plan view of a tank header showing holes.

FIG. 4 is a vertical sectional side view of the overall configuration.

FIG. 5 is a diagram corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 6 is a view corresponding to FIG.

FIG. 7 is a view corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 8 is a view corresponding to FIG.

FIG. 9 is a view corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 10 is a view corresponding to FIG. 1 showing a conventional example.

FIG. 11 is a vertical cross-sectional side view showing a partition part of the header.

FIG. 12 is a view corresponding to FIG.

FIG. 13 is a view corresponding to FIG. 11 showing a defective joint state of the partition section.

[Explanation of symbols]

11 is a refrigerant condenser, 12 and 13 are headers, 12a and 13
a is a tank header, 12b and 13b are plate headers,
14 is a core, 14a is a tube, 14b is a corrugated fin, 17 is a partition part, 18 is a first flow path, 19 is a second flow path, 26, 27, 41 are separators (plate parts), 26
Reference numerals a and 27a are engaging protrusions, 28 is a hole portion, 28a and 28b are engaging hole portions, 28c is a communicating hole portion, and 29 and 33 are separator units (partitioning portions).

Claims (1)

[Claims] 1. A header joined to the ends of a plurality of tubes, a first flow path through which a heat exchange medium flowing into the tubes flows, and a heat exchange medium flowing out of the tubes. In a heat exchanger including a partition section that divides into two flow paths, the partition section is configured by two plate sections arranged in a state where a space section is present between them, and the header peripheral wall section is provided with A heat exchanger characterized in that an engagement hole for mounting the plate and a communication hole for communicating the space with the outside of the header are connected to each other.