JPS6391488A - Heat exchanger - Google Patents

Abstract

PURPOSE:To constitute heat exchangers having different objects of application as an integral body by bonding and fixing header tanks to a plurality of tubes by injecting and filling a resin therebetween and providing partition plates for dividing a heat medium circulation circuit at the intermediate of the header tanks. CONSTITUTION:Tubes 2 are disposed horizontally in the up and down direction and both ends of each tube 2 are connected to header tanks 1 and 1. At the header tanks 1 partition walls 1b, 1c and 1d are provided in parallel to an inner side wall 1a, and a resin 12 is filled in an inside resin filled space 5a and an outside resin filled space 5b. A radiator-condenser partition plate 10 is inserted and bonded into and to the header tank 1. At a radiator part 8 a heat exchange medium which has flowed thereinto through an inlet pipe 13 flows out of an outlet pipe 14 via an inside storage space 6a and the tube 2. At the condenser part 9 the heat exchange medium which has flowed thereinto through an inlet pipe 15 flows out of an outlet pipe 16 via an outside storage space 6b and the tube 2, and conducts heat exchange with air circulating in a direction W.

Description

[Detailed Description of the Invention] Industrial Application Field This invention is a heat exchanger mainly used for automobiles, and in particular, it is possible to configure heat exchangers for different purposes, such as a radiator and a condenser, as an integrated unit. Regarding heat exchangers.

Conventional technology Conventionally, for example, radiators and capacitors for automobiles are
Each was designed with a different structure due to the difference in required characteristics. That is, as a radiator, a plurality of tubes for circulating a heat exchange medium are arranged in parallel with fins interposed between them, and both ends of each tube are connected to a tank section for storing a heat exchange medium. A type of structure was used. On the other hand, as capacitors are required to have high pressure resistance, they are generally of the so-called serpentine type, that is, a multi-hole extruded flat tube called a harmonica tube is bent into a serpentine shape.
Generally, a core was constructed by arranging fins between the parallel parts.

Problems that the invention aims to solve As described above, conventional radiators, condensers, etc. were designed and manufactured as independent heat exchangers of different types, which required a lot of man-hours to manufacture and install them in the automobile engine room, which was costly. It had drawbacks such as being expensive and not easy to install. Moreover, when installed in the engine room, they are usually placed side by side, front and back, so their combined volume, including the fan and motor for forced cooling, becomes quite large, which takes up a lot of space in the engine room. The occupancy rate is high. For this reason, combined with the tendency to downsize the engine room in order to expand the living space, the arrangement environment for various other parts installed in the engine room has become complicated, and the installation of these parts requires work and repair/replacement work. This also led to some truly troublesome problems.

The present invention has been made in view of this technical background, and aims to solve the above-mentioned drawbacks by providing a heat exchanger that can integrate a radiator, a condenser, etc.

Means for Solving the Problems According to the present invention, a header tank section is formed of a hollow extruded member, and a longitudinal partition wall is provided in the header tank section, so that tubes can be fixed in the header tank section. A resin filling space and a heat exchange medium storage space are formed separately, and an end of the tube is inserted into the header tank portion so as to cross the resin filling space and face the heat exchange medium storage space, Furthermore, by injecting and filling the resin filling space, the header tank part and the plurality of tubes are joined and fixed, and a heat exchanger made of tubes is provided in the longitudinally intermediate part of the header tank part. The gist of the present invention is a heat exchanger characterized by being provided with a partition plate that divides a medium circulation circuit into a plurality of independent circuits.

Example Next, the configuration of the present invention will be explained based on illustrated embodiments.

This example shows an aluminum radiator/condenser integrated heat exchanger that integrates a radiator and a condenser.

In Figures 1 to 6, (1) and (1) are header tank parts arranged on both the left and right sides, and (2) are arranged horizontally in the vertical direction, and both ends are connected to the header tank parts (1). A plurality of tubes connected to (1), (3) are corrugated fins interposed between adjacent tubes (1) (1), and tubes (1) and corrugated fins (3) are connected to each other.
) is formed into a heat exchanger core part (4).

The header tank portion (1) is formed of a hollow extruded member made of aluminum or an alloy thereof and having a semi-elliptical cross section. This header tank part (1) is provided with three partition walls (1b), (lc), and (ld) in the length direction in parallel with its inner side wall (la), which allows the inner side wall (1a) and the An inner resin-filled space (5a) is formed between the first partition wall (1b) and the second partition wall (1c) and the third partition wall (1c).
An outer resin filling space (5b) is formed between the first partition wall (lb) and the second partition wall (lb).
An inner heat exchange medium storage space (8a) is provided between the partition wall (1c) and the partition wall (1c).
), an outer heat exchange medium storage space (6b) is formed between the third partition (1d) and the outer arcuate wall (le). In addition, the upper and lower openings of each header tank part (1) are respectively closed by lid pieces (7a) and (7b), and a position slightly below the longitudinal center of the header tank part (1) is closed by a cover piece (7a) (7b). , a radiator/condenser partition plate (lO) that divides the heat exchanger into an upper radiator section (8) and a lower condenser section (9) is inserted into the insertion hole (lid).
) are inserted and joined through.

In the radiator section (8), tube insertion holes (lla) are arranged in rows at predetermined intervals on the inner side wall (1a) and the first partition wall (1b) of the header tank section (1), while the condenser section ( 9), the inner side wall (la) of the header tank part (1), the first partition wall (lb),
Similarly, tube insertion holes (llb) are arranged in rows at predetermined intervals in the second partition wall (lc) and the third partition wall (1d).

The tube (2) is also constructed of a flat extruded section made of aluminum or an alloy thereof. Note that the tube may be constructed using an electric resistance welded tube instead of using an extruded shape. Then, the tube (2) of the radiator section (8)
A) and the tube (2b) of the condenser section (9) have different design specifications. That is, the radiator tube (2a) is set to a thickness of about 3 to 4 mmttt, and the condenser tube (2b) is set to a thickness of 4 to 4 mm. It is set at about 5tra. Further, the condenser tube (2b) is designed to be longer than the radiator tube (2a). Furthermore, although a multi-hole extruded shape is used for both tubes, the number of holes is greater in the tube (2b) of the condenser section, as shown in FIG. The widths of the tubes are all set to be the same. The width of this tube should be changed depending on the area of the surface of the heat exchanger core (4) facing the circulating air, and if the area is large, it is better to set the width small in consideration of heat exchange efficiency. Conversely, when the area of the core portion (4) is small, it is preferable to set the width large to ensure a predetermined amount of heat dissipation. Then, the tube (2a) in the radiator section (8) is connected to the header at both ends until the end edge crosses the inner resin filling space (5a) and matches the outer edge of the first partition wall (lb). The resin (1) is inserted into the corresponding insertion hole (lla) of the tank part (1) and is injected and filled into the resin filling space (5a).
2) is firmly connected and fixed to the header tank part (1). On the other hand, the tube (2b) in the capacitor part (9) has its end edge crossing the inner resin filling space (5a) and the outer resin filling space (5b), and the third partition wall (1
Both ends are inserted into the corresponding insertion holes (llb) of the header tank part (1) until they match the outer edges of the inner and outer resin filling spaces (5a) (5b).
) is firmly connected and fixed to the header tank part (1) via the resin (12) injected and filled.

Furthermore, a radiator heat exchange medium inlet pipe (13) is connected to the upper end of the right header tank section (1) in communication with the inner storage space (6a), and a radiator/condenser partition plate of the right header tank section An outlet pipe (14) is also connected above (10) in communication with the inner storage space (θa). In addition, a circuit partition plate (17) that partitions the inner storage space (6a) is located approximately in the center of the radiator portion of the right header tank section.
e) are inserted and bonded via. As a result, in the radiator section (8), as shown by the arrow in FIG.
The heat exchange medium flowing in from the inlet pipe (13) passes through the upper tube group from the inner storage space (6a) of the header tank section (1) on the right side to the inner storage space (6a) of the ladder tank section (1) to the left side. 6a), then turns around, passes through the lower tube group, reaches the inner storage space (6a) of the right header tank section, and flows out of the heat exchanger from the outlet pipe (14). It is said that On the other hand, below the radiator/condenser partition plate (10) of the left header tank section (1), a condenser heat exchange medium inlet pipe (15) is connected in communication with the outer storage space (6b).
The outlet pipe (1B) is connected to the lower end of the right header tank portion in a manner that communicates with the outer storage space (6b). In addition, an outer storage space ( Circuit partition plates (18) (18) that partition [ia] are inserted and joined through insertion holes (111'), respectively. Therefore, in the capacitor section (9), the rudder tank section (
The heat exchange medium flowing into the outer storage space (6b) from the inlet pipe (I5) of 1) meanderingly flows through the tube group divided into four by the partition plates (18) (18) and passes through the right header. Outside storage space (6b) of tank part (1)
and flows out from the outlet pipe (1B) to the outside.

Inner resin filling space (5a) of header tank part (1)
, and the outer resin filling space (5b) of the capacitor part (9)
The resin (12) filled in the tube serves to connect and fix the header tank part (1) and the tube (2) as described above. This resin is injected in a liquid state and then hardened.

Furthermore, in this embodiment, the resin (
12) is injected into the inner side wall (l) of the header tank part (1).
a) from the notch (19) formed in the length direction, and the outer filling space (
For injection into 5b), use the lid piece (
7b) through the injection hole (20). Of course, the injection position is not limited to the above, and injection holes may be provided in the front and rear side walls of the header tank portion (1) to communicate with the inner and outer filling spaces (5a) and (5b). As for the type of resin (12), any resin can be used as long as it exhibits sufficient bonding force between the header tank part (1) and the tube (2) or has good injection workability. Epoxy resins are particularly preferred. This resin makes the tube (2
) and the header tank part (1) are maintained in a strong joint state, but the resin filling space (5) of the tube (2)
a) On the peripheral surface facing (5b), dimple a hemispherical recess (21) as shown in Fig. 7 or provide a groove-like recess (21-) as shown in Fig. 8. The tube (2) may be further prevented from falling off by biting the resin into the recess. By the way, the tube (2) in the capacitor part (9) is connected to the inner and outer resin filling space (5a).
) The double junction structure in (5b) is used because the pressure resistance required for the capacitor section (9) is higher than that of the radiator section (8).
This is because it is much larger than the pressure resistance required for.

In other words, the pressure resistance required for the radiator section (8) is approximately 1.2 Ny/d, while the pressure resistance required for the capacitor section (9) is approximately 1.2 Ny/d.
) reaches about 25Kg/ai. Therefore, by adopting a double joint structure, the joint strength is improved and leakage is completely prevented.

The corrugated fin (3) is made of aluminum and has a corrugated plate-like structure in which the plates are continuously folded back at equal intervals in a curved shape, and preferably has louvers on each vertical wall. A cut and raised shape is used. This corrugated fin (3) has a fin height slightly higher than the interval between the adjacent tubes (2) (2), and a fin length approximately equivalent to the interval between the left and right header tank parts (1) (1). It is designed to have a Then connect both ends of the fin to the inner side wall (la) of the header tank part (1) (1).
(la), and the direction of the air flowing between the corrugated fins (3) is arranged and fixed in a direction perpendicular to the direction of the heat exchange medium flowing through the tubes (2). . The fins (3) and the tubes (2) are joined by a common joining method, such as vacuum brazing, flux brazing, or reactive soldering.

(22) shown in Figures 1 to 3 are the upper and lower side pieces with a U-shaped cross section, which are disposed outside the outermost corrugated fin. The insertion piece (22a) is inserted into the inner resin filling space (5a) through the insertion hole (llc), and is connected to the header tank part (1) with the same resin (12) as the tube. The hole (22b) formed in the insertion piece (22a) is a retaining hole that prevents the side piece (22) from falling out due to biting of the resin (12). (23) shown in FIG. 2 is a supply pipe for the radiator section (8).

To manufacture the heat exchanger as described above, first, the header tank part (1) (1) is formed using a hollow extruded member of a predetermined length, and then a separately manufactured lid piece (7a) is attached to the header tank part.
) (7b), supply pipe (23), heat exchange medium inflow and outflow pipes (13) (14) (15), (1B),
The radiator/condenser partition plate (10) and the circuit partition plates (17) and (18) are soldered to corresponding parts in a predetermined arrangement. Thereafter, the header tank section (1) and the tube (2) are connected in the following procedure. i.e. each tube (
2) into the insertion holes (lla) of the inner side wall (la) and the first partition wall (]b) of the left and right header tank parts (1) in the radiator part (8), and the capacitor part (9). ) further includes second and third partition walls (lc).
At the same time, the upper and lower side pieces (22) are placed in the insertion hole (flb) of (ld), and the upper and lower side pieces (22) (22) are oriented in a predetermined direction.
a) and into the insertion holes (lie) of the first partition wall (1b) to form a framework.

Next, a corrugated fin (3) having a fin height slightly higher than the spacing between the tubes is inserted in a predetermined direction between the adjacent tubes (2) and between the outermost tube and the side piece (22). to temporarily assemble the heat exchanger. By adopting this assembly method, the tube (2), fin (3), header tank part (1), and side piece (22) are firmly fixed, eliminating the need for jigs or bands for tightening. Become. Thereafter, the tube (2) and the fin (3) are bonded and fixed, for example, by reactive soldering. In addition to this assembly method, another method is to arrange the tubes (2) and fins (3) alternately and place the side pieces (22) on both sides, then solder the set in advance, and then attach the ladder tank to the set. It may also be inserted into section (1) (1). Next, from the notch (19) provided in the inner side wall (1a), the inner filling space (
5a) and further in the capacitor part (9) from the injection hole (20) of the lid piece (7b) to the outer filling space (5b).
Fixing resin (12) is injected into. At this time, by utilizing the heat generated during bonding, the resin (12) is filled without any gaps, and then, if necessary, is further heated and cured. After the resin (12) has hardened, the header tank part (1), tube (2) and side piece (22
) are completely bonded and fixed via the resin (12). Moreover, since the inner resin filling space (5a) and the outer resin filling space (5b) in the capacitor part (9) are filled with sufficient resin, the header tank part (1)
There is no risk of liquid leakage from the joint between the tube (2) and the tube (2). In particular, the capacitor part (9) adopts a double joint structure in which the inner and outer resin filling spaces are joined, which further improves the joint strength and ensures perfect leakage prevention. can.

When installing the heat exchanger manufactured above in the engine room of an automobile, a pair of fans and motors for forced air cooling may be installed for each of the radiator section (8) and condenser section (9). Alternatively, a pair may be attached and used in common. In the radiator section (8), the heat exchange medium flowing from the inlet pipe (13) flows into the inner storage space (6) of the header tank section (1).
a) through the tube (2) and the outlet tube (14
), while the heat exchange medium flowing into the condenser section (9) from the inlet pipe (15) flows through the outer storage space (6b) of the header tank section (1) and the tube (2). , flows out from the outlet pipe (1B). While flowing through this tube (2), heat exchange is performed between the air flowing through the air circulation gap including the fins (3) in the direction shown by the arrow (W) in FIGS. 1 and 6.

In the above embodiment, two independent heat exchange medium circulation circuits are formed in the upper and lower parts, and the upper part is connected to the radiator part (8).
, a heat exchanger is shown in which the lower side is the condenser section (9), but the upper side may be the condenser section and the lower side may be the radiator section. Further, the heat exchanger is not limited to a radiator and condenser integrated type, but may be an integrated type of a radiator and a cooler, or other combinations, if necessary.

Furthermore, if necessary, the heat exchange medium circulation circuit may be divided into three or more parts, or may be divided not in the vertical direction but in the horizontal direction.

Effects of the Invention As described above, in the heat exchanger according to the present invention, since the header tank part is made of extruded material, it can be made strong with high pressure resistance, and the connection between the header tank part and the tubes is also made of resin-filled material. By using the resin filled in the space, a strong bond is achieved and the structure is made of plastic, so it can be used as a capacitor for car coolers, etc., where previously only serpentine types were available due to pressure resistance issues. It is also possible to apply

In this way, the heat exchanger has a structure that can realize high pressure resistance, and a partition plate is provided to divide the heat exchange medium distribution circuit composed of tubes into a plurality of independent circuits. Like the radiator and condenser shown in , heat exchangers for different purposes can be configured as an integrated unit. As a result, for example, in the case of automotive products, compared to the conventional method of manufacturing independent heat exchangers separately and installing them in the engine room, the number of parts is reduced and only one assembly line is required, resulting in lower manufacturing costs. In addition to significantly reducing the amount of damage required, the number of man-hours required for installation in the engine room is also reduced, and the workability of installation is also improved. Furthermore, instead of mounting separately, the brackets and holding stands on the vehicle body can be shared, which can contribute to reducing the total weight of the vehicle and improving fuel efficiency. Furthermore, the space occupied in the engine room can be reduced to about half or less, and the installation space for other parts can be increased, and the living space can also be expanded.

Furthermore, as mentioned above, since the connection between the header tank part and the tube is made using resin, when inserting and installing the tube into the header tank part, even if there is a gap between the tank part and the tube, resin is used. Since the tube is firmly joined and fixed to the header tank part by the resin sufficiently injected into the filling space, there is no need for tube expansion work or brazing work to closely connect or join the header tank part and the tube.

Therefore, the connection work between the header tank section and the tube can be simplified, and productivity can be improved. Furthermore, since the header tank part is formed from an extruded shape, it can be easily manufactured by extruding it into a long length and then cutting it to a predetermined length, so even if the length of the core part changes, the header tank part There is also the effect that it can be easily handled by simply changing the cutting length.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view showing a heat exchanger with a part of the header tank section cut away, Fig. 2 is a front view of the same, and Fig. 3 is a diagram showing the constituent members. 4 is a sectional view taken along the line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along the line V-V in FIG. 2, and FIG. 6 is a sectional view taken along the line V-V in FIG. ■−■ in Figure 2
A line sectional view, FIG. 7 is a sectional view showing a modification of the falling-off prevention structure provided at the end of the tube, and FIG. 8 is a front view showing another modification of the falling-off prevention structure. (1)...Header tank part, (1b)...First partition wall, (1c)...Second partition wall, (1d)...Third
Partition wall, (2)...tube, (2a)...radiator tube, (2b)...condenser tube, (3)...corrugate fin, (5a)...inner resin filling space , (5b)...outer resin filling space, (6
a)...Inner heat exchange medium storage space, (6b)...Outer heat exchange medium storage space, (8)...Radiator section, (
9)...Capacitor section, (10)...Radiator section
Capacitor partition plate, (12)...Resin. Above-1,...,...' Figure 8

Claims (2)

[Claims] (1) A header tank section is formed using a hollow extruded member, and a longitudinal partition wall is provided in the header tank section, thereby dividing the header tank section into a resin filling space for fixing tubes and a heat exchange medium storage space. At the same time, the end of the tube is inserted into the header tank part so that it crosses the resin filling space and its opening faces the heat exchange medium storage space, and the resin is injected and filled into the resin filling space. As a result, the header tank part and a plurality of tubes are joined and fixed, and the heat exchange medium distribution circuit constituted by the tubes is divided into a plurality of independent circuits in the longitudinally intermediate part of the header tank part. A heat exchanger characterized by being provided with a partition plate. (2) Two resin filling spaces are provided in the header tank space at intervals in the tube insertion direction, and
A heat exchange medium distribution circuit constituted by tubes is divided into two independent circuits, one of which is a radiator circuit and the other a condenser circuit, and the tube forming the radiator circuit has an end portion thereof. Claim 1 is characterized in that the capacitor circuit is joined only in the inner filling space, while the end of the tube forming the capacitor circuit is joined in both the inner and outer filling spaces. heat exchanger.