JPS6242293Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger having upper and lower tank members and a plurality of tubes connecting the tank members.

As shown in Fig. 1, tank members 1 and 2 are placed on top and bottom.
The tank members 1 and 2 are connected by a flat tube 3, and the upper and lower tank members are provided with an inflow pipe 4 and an outflow pipe 5 for internal fluid, and a corrugated fin 6 is arranged between the flat tubes 3. The heat exchanger has a large number of passages through which the fluid passes, so there is little pressure loss in the internal fluid, the flat tube arrangement pitch can be set as desired, and it has excellent heat transfer performance. There were advantages such as:

However, the internal fluid that has flowed into the upper tank member 1 does not flow uniformly through the plurality of flat tubes 3, and the pressure resistance against the internal fluid is low. Although there is no problem when used, it has a defect that causes problems such as breakage and deformation when using high-pressure fluids such as engine oil and fluorocarbon-based refrigerants.

Although not shown, a heat exchanger is also known in which the ends of each flat tube are connected by a U-shaped or U-shaped member so that the internal fluid flows uniformly in a zigzag pattern. However, even with this structure, if the temperature difference between the internal fluid and the heat exchange fluid is large, it is impossible to avoid uneven flow of the internal fluid, and there remains a problem of pressure resistance.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a heat exchanger that has improved pressure resistance without sacrificing the above-mentioned advantages and allows fluid to flow uniformly within the flat tube.

Another object of the present invention is to provide a heat exchanger that is easy to manufacture and assemble.

In order to achieve the above object, the present invention provides a heat exchanger in which flat tubes and corrugated fins are stacked alternately and a tank member is arranged at both ends of the flat tube. It consists of a tank lower plate that fits the formed tank part and the end of the flat tube and closes the opening of the tank part, and the protrusions are communicated by passages that communicate the alternately opposing protrusions. The passages of the upper and lower tank members are provided at offset positions and in a direction perpendicular to the protrusion between the opposing side walls of the protrusion.

In a heat exchanger constructed in this way, the internal fluid flowing in through the inlet of the flat tube first enters the protrusion of the upper tank member, exchanges heat with air as it moves through the flat tube, and then enters the protrusion of the lower tank member. The internal fluid then passes through the passage from this protrusion into the next protrusion, rises through the flat tube, exchanges heat again, and enters the second protrusion of the upper tank member. The internal fluid moves through the flat tube in this serpentine manner, flows out of the outlet, circulates, and flows back into the inlet. The mechanical strength of the tank is increased by the protrusion and the passage provided between the opposing side walls of the protrusion at right angles to the protrusion, and therefore the pressure resistance is also improved.

The present invention will be described below with reference to drawings showing embodiments.

FIG. 2 is a front view of a heat exchanger showing an embodiment of the present invention. This heat exchanger 10 has upper and lower tank members 11 and 12.
The two are communicated by a plurality of flat tubes 13, and a corrugated fin 14 is disposed between the flat tubes 13. Also, the upper tank member 1
1 are provided with a fluid inlet pipe 15 and a fluid outlet pipe 16 on both sides.

Here, the tank members 11, 12 are tank parts 111, 1 which are integrally formed with a plurality of protrusions 11a, 12a by press working, as shown in FIGS. 2 and 3.
21 and tank lower plates 112, 122 which fit the ends of the flat tube 13 and close the openings of the tank parts 111, 121. Also, the protrusion 1
1a and 12a are passages 11 communicating with alternately opposing protrusions as shown in FIG. 4 or 5.
3,123, and this passage 113,12
3 is formed at the upper and lower tank members 11 and 1.
2, they are provided at positions shifted from each other. Further, the passages 113 and 123 are integrally formed with each protrusion so as to directly connect the opposing side walls of the protrusion, and also serve to reinforce the tank members 11 and 12 in the same way as the ribs. In the embodiment of the present invention, each protrusion is configured to communicate with two flat tubes. Therefore, one protrusion 11a of the upper tank member 11 is connected to the fluid inlet pipe 15.
The internal fluid that has flowed into the lower tank member 12 flows through the two flat tubes 13 to one protrusion 12a of the lower tank member 12, and the fluid that has flowed into this protrusion 12a flows through the passage 123 to the adjacent protrusion 12a. By the meandering flow that flows into the protrusion 11a of the tank member 11 on which the outlet pipe 16 is provided, it is guided to the protrusion 11a of the tank member 11 where the outlet pipe 16 is provided. , will flow out of the heat exchanger 10. At this time, the fluid flowing inside the flat tube 13 flows uniformly.

Note that if the temperature difference between the internal fluid and the heat exchange fluid passing through the heat exchanger is large and the amount of heat exchange is large, the flow of the internal fluid will be uneven, but in this case, the flow of the internal fluid will be uneven. Passage provided 1
13 and 123 are shifted from the center of the protrusion toward the side where the heat exchange fluid flows in, or by making them plural as shown in FIG. 6 and changing the cross-sectional area, a uniform flow can be achieved.

As described above, according to the present invention, the tank member can be constructed from a member formed by simple press processing, so that manufacturing and assembly can be easily performed.

As described above, the heat exchanger of the present invention has a tank member that includes a tank part integrally formed with a plurality of protrusions and a tank lower plate that fits the end of the flat tube and closes the opening of the tank part. , the protrusions are connected by passages that communicate alternately opposing protrusions,
Since the internal fluid is moved in a meandering manner within the flat tube, even if the amount of heat exchange is large, the flow of the internal fluid can be made uniform, and the tank member can be manufactured easily.

In addition, since the passage connects each protrusion between the opposing side walls in a direction perpendicular to the protrusion, the pressure resistance of the tank part is improved, and since the passage does not protrude beyond the tank member, the heat exchanger can be made larger. It has the advantage that there is no risk of it becoming

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional heat exchanger;
The figure is a front view of a heat exchanger showing an embodiment of the present invention, Figure 3 is a sectional view taken along line A-A in Figure 2, Figure 4 is a sectional view of the tank section, and Figure 5 is B in Figure 4. - B line sectional view,
FIG. 6 is a sectional view showing another embodiment of the tank section. 10... Heat exchanger, 11, 12... Tank member, 111, 121... Tank part, 11a, 12
a... Projection, 113, 123... Passage, 13...
Flat tube, 14...corrugated fin.

Claims (1)

[Claims for Utility Model Registration] (1) In a heat exchanger in which flat tubes and corrugated fins are stacked alternately and a tank member is arranged at both ends of the flat tube, the tank member is integrated with a plurality of protrusions. It consists of a tank lower plate that fits the formed tank part and the end of the flat tube and closes the opening of the tank part, and the protrusions are communicated by passages that communicate the alternately opposing protrusions. A heat exchanger characterized in that the passages of the upper and lower tank members are provided at offset positions and in a direction perpendicular to the protrusion between opposing side walls of the protrusion. (2) Utility model registration claim 1, characterized in that the passage communicating between the protrusions is provided at a position offset from the center of the protrusions toward the inflow side of the heat exchange fluid passing through the heat exchanger. Heat exchanger as described in section. (3) The heat exchanger according to claim 1 of the utility model registration, characterized in that a plurality of passages are provided to communicate between the protrusions. (4) The heat exchanger according to claim 3, wherein the plurality of passages have different cross-sectional areas.