JPH029279Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a laminated heat exchanger used as an evaporator in a car cooler, for example.

Prior Art In this type of laminated heat exchanger, plate-shaped tube elements having communicating tank portions at the ends and corrugated fins are stacked in multiple stages in an alternating arrangement, and a side plate is placed on the outside of the outermost corrugated fin. It is known that a header is attached to the outer surface of the tank portion of the outermost tube element in order to uniformly distribute the heat exchange medium.

However, in such a heat exchanger, it is difficult to position the members relative to each other during assembly, and in particular, the relative position between the outermost side plate and the header tends to shift. For this reason, conventionally, various setting jigs have been used to restrict and hold the members in predetermined positions. However, the use of such a jig has the problem of not only increasing the cost required to manufacture the jig itself, but also increasing the time and effort required to set up parts during assembly.

Therefore, as seen in Utility Model Application No. 58-162474, for example, a plurality of positioning protrusions are cut and raised at the end of the side plate, and these protrusions form a header between the side plate and the tank part. A heat exchanger has been proposed in which the positioning of the heat exchanger is self-regulating.

Problems to be Solved by the Invention However, in the heat exchanger as described above, the work of cutting and raising the protrusions is troublesome, and the cost is rather high. Furthermore, there is a risk that an undesired external force will be applied to the protruding pieces during assembly or other handling of the heat exchanger, and this external force will cause the protruding pieces to tilt, resulting in damage to the side plates, headers, tube elements, etc. There was also a runner-up where slight deviations were likely to occur in the proper arrangement of parts. Furthermore, since the header is positioned between the side plate and the tank part, the side plate exists in a superposed state on the outer end surface of the header, and therefore heat is generated by the thickness of the side plate. When the size of the exchanger increases or when the height of the header varies, the side plate may be placed in the gap between adjacent tube elements to widen or narrow the gap between the corrugate fins placed in the gap, etc. There were drawbacks such as an adverse effect on the dimensions and shape of.

This invention was made in view of these drawbacks, and it not only makes it possible to self-regulate the mutual positioning of the members mentioned above, but also makes it possible to perform the work from assembly to joining efficiently, and to heat the assembly with high precision. It is intended to provide an exchange.

Means for Solving the Problems According to this invention, a plurality of plate-like tube elements 1 having a communicating tank portion 1b at their ends and corrugated fins 2 are laminated in a plurality of layers in an alternating arrangement. In a laminated heat exchanger in which a side plate 3 is arranged at the side plate 3, and headers 4, 4' are attached to the outer surface of the tank section of the outermost tube element, a U-shaped The heat exchanger is characterized in that a notch 6 is formed, and the peripheral edges of the headers 4, 4' are fitted into the notch.

Embodiments The configuration of this invention will be described below with reference to illustrated embodiments.

In the embodiment shown in FIGS. 1 to 4, 1
2 is a plurality of plate-like tube elements, 2 is a corrugated fin interposed between the adjacent tube elements 1 and 1 and alternately stacked and joined together; 3 is an outermost corrugated fin 2 outside the outermost corrugated fin 2; Upper and lower side plates are arranged, 4 is an outlet header, and 4' is an inlet header.

The tube element 1 has a bulging heat exchange medium passage 1a formed in a desired pattern in the middle part.
It also has tank portions 1b at both ends communicating with the passage 1a and having a relatively large bulge height. and adjacent tube element 1,
1 tank parts 1b, 1b are integrated by soldering through communication holes 1c, 1c as shown in FIG.
5 is formed. The tube element 1 is generally manufactured by stacking two metal molded plates, each of which has both ends and a middle portion press-molded into recesses of different depths, and joining them together. The outer molded plate of the outermost tube element is flat at both ends.

At one longitudinal end of the side plate 3,
A U-shaped notch 6 for positioning the headers 4, 4' is formed in the middle, and both ends thereof are bent inward by a slight length into an L-shape. . And header 4,
4' is fitted with its upper circumferential edge into the notch 6, and is brazed to the outer wall of the tank portion 1b of the outermost tube element 1 with its mounting position regulated. . The width and depth of the notch 6 are determined based on the dimensions of the headers 4, 4' and the headers 4, 4'.
4', the side plate 3, and the outermost tube element 1.

The headers 4, 4' are provided to equalize the distribution of the heat exchange medium within the heat exchanger.
It has a rectangular parallelepiped shape and has a recess 4a that is open on the lower surface of the outlet header 4 and the upper surface of the inlet header 4'. This recess 4a
The opening is formed in an oval shape large enough to face all of the plurality of through holes 1d arranged in a row in the width direction on the outer surface of the tank portion of the outermost tube element 1. Furthermore, a protrusion 4b for connecting the heat exchange medium inlet and outlet is formed on one side of the header 4, 4' opposite to the side plate side.
Further, the protrusion 4b is provided with a through hole 4c that communicates with the recess 4a. and through hole 4
The pipe ends of the heat exchange medium inlet pipe 7 and the heat exchange medium outlet pipe 8 are welded and fixed to the distal end surface of the protruding portion 4b, respectively, in communication with the heat exchange medium inlet pipe 7 and the heat exchange medium outlet pipe 8. Here, the reason for providing the protruding portion 4b is to facilitate welding work and
This is to ensure that the connection points between the inlet pipe 7, the outlet pipe 8, and the headers 4, 4' are as far away from the heat exchanger body as possible to prevent thermal effects during welding from reaching the heat exchanger side.

The corrugated fins 2 are generally made of aluminum and have louvers cut and formed.

Although not shown in the drawings, preferably, partition plates are provided in each of the tanks 5, 5 to change the flow direction of the heat medium for each tube element group of a predetermined number and cause the medium to flow in a meandering manner. is provided, whereby the heat exchange medium circuit group is divided into two or more, forming a so-called multi-pass type heat exchanger.

In the heat exchanger described above, the heat exchange medium is fed from the heat exchange medium inlet pipe 7 to the heat exchange medium passage 1a of the tube element 1 via the inlet header 4'. This heat exchange medium is preferably circulated in a meandering manner in reverse directions for each group of tube elements, and during this time exchanges heat with the air flowing between the tube elements 1, 1, and is used as an evaporator. In the case of a heat exchanger, evaporation occurs and eventually exits from the outlet header 4 to the outlet pipe 8 and is sent to a compressor or the like (not shown).

By the way, the above heat exchanger is assembled by stacking the tube elements 1 and corrugated fins 2 alternately in multiple stages, then setting the side plates 3 and headers 4, 4', and brazing the whole in a temporarily assembled state. At the time of setting, the headers 4, 4' can be easily set in the correct position by fitting into the notches 6 of the side plate 3, as shown in FIG. Furthermore, by bringing one side end of the outermost corrugated fin 2 into contact with the headers 4, 4' in this state, the corrugated fin can also be fixed and positioned. In addition, even during the handling process until the soldering is completed, the notch 6 is removed from the headers 4, 4'.
This prevents the headers 4, 4', and even the outermost corrugated fin 2 from moving, so that the headers 4, 4' and even the outermost corrugated fin 2 can be maintained in the correct position and fixed by brazing.

FIG. 5 shows a modification of the side plate 3', in which the longitudinal edge of the notch 6' is bent inward to provide an L-shaped bent part 3a'. It is.

In the above illustrated embodiment, the plate-shaped tube element 1 is formed by overlapping two molded plates, but instead of this, it may be formed by other forming means, for example, by two aluminum plates. A roll bond panel or the like may be used, which is obtained by applying an anti-crimping agent in a desired pattern, overlapping them and pressing them together, and then expanding the non-crimped parts using fluid pressure. Further, although the case is shown in which a tube element 1 having tank portions at both ends is used, this invention can be effectively applied to a tube element having a tank portion at one end. Also,
Although a horizontal heat exchanger is shown in the embodiment, this invention may also be applied to a vertical heat exchanger.

Effects of the invention As mentioned above, in this invention, a U-shaped notch is formed at one end of the side plate, and the peripheral side edge of the header is fitted into the notch to self-regulate its position. Therefore, when assembling and manufacturing a heat exchanger, the header and even the outermost corrugated fins can be set easily and accurately, and the setting time can be shortened, which in turn improves work efficiency and productivity. Improvements can be made. In addition, even during the handling process after setting until brazing is completed, the positional relationship of each component, especially the side plate and header, can be maintained correctly, so that the parts can be kept evenly without misalignment or unevenness. It is possible to manufacture a heat exchanger with consistent performance.

Furthermore, it is not necessary to use a positioning jig such as a header, and instead of cutting and forming a protruding piece on the side plate as described in the conventional example, it is possible to form a notch on the side plate that can be machined. Therefore, the cost required for positioning the header and the like, as well as the manufacturing cost of the heat exchanger, can be reduced. Furthermore, since there is no risk that the position of the header etc. will be slightly misaligned due to external force being applied to the protruding piece and causing it to tilt, it is possible to provide a heat exchanger with high assembly accuracy.

Furthermore, since the header is positioned and fixed by fitting into the circumferential edge of the header into the U-shaped notch, the side plate does not overlap with the outer end surface of the header. The heat exchanger can be made smaller by the thickness.
Furthermore, even if the height of the header varies, the gap between the side plate and the adjacent tube element does not change, so there is no risk of affecting the dimensions and shape of the corrugated fins placed in the gap. be.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of this invention, in which Figure 1 is a perspective view of the area around the header, Figure 2 is a front view of the entire heat exchanger, and Figure 3 is a side plate. Plan view with parts removed, No. 4
The figure is a sectional view taken along the line -- in FIG. 3, and FIG. 5 is a plan view showing a modified example of the side plate. 1, 1, 1...Tube element, 1b, 1
b, 1b... Tank part, 2, 2, 2... Corrugated fin, 3... Side plate, 4, 4'...
Header, 6... Notch.

Claims (1)

[Scope of utility model registration request] A plurality of plate-like tube elements 1 and corrugated fins 2 having communicating tank portions 1b at their ends are stacked in an alternating arrangement, and a side plate 3 is arranged outside the outermost corrugated fin, while a side plate 3 is arranged outside the outermost corrugated fin. In a laminated heat exchanger in which headers 4, 4' are attached to the outer surface of a tank section, a U-shaped notch 6 is formed at one end of the side plate 3, and the headers 4, 4' are installed in the notch. A heat exchanger characterized in that circumferential edges of 4' are fitted together.