JPH0435733Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a heat exchanger, and more specifically, to a stacked heat exchanger formed by stacking a large number of tube elements.

(Prior art) As this type of heat exchanger, for example,
There is one that became publicly known from Publication No. 32375. A specific example is shown in FIG. 6, where the tube element 1 is constructed by placing two molded plates 2 together in the middle, and tanks 3a and 3b are arranged side by side at one end of the tube element 1. has been done. A partition wall 4 extends from between the tanks 3a and 3b to near the other end of the tube element 1, forming a U-shaped heat exchange medium passage 5. Therefore, the heat exchange medium such as the refrigerant that enters from one tank 3a makes a U-turn through the heat exchange medium passage 5 and exits from the other tank 3b, so it is considered that tanks are provided at both ends of the tube element. In comparison, the effective area where the heat exchange medium exchanges heat becomes larger, which has the advantage of increasing heat exchanger efficiency.

(Problem to be solved by the invention) However, since the heat exchange medium passing through the heat exchange medium passage 5 tends to shorten its passage distance as much as possible, a large amount passes near the partition wall 4. There was a problem in that the amount passing through the vicinity of the corner shown by diagonal lines was extremely reduced, resulting in a so-called dead zone, which reduced efficiency.

Therefore, the object of this invention is to improve the flow condition of the heat exchange medium and provide a more efficient laminated heat exchanger.

(Means for solving the problem) The gist of this invention is that a plurality of tanks are arranged in parallel at one end, and a partition wall is formed extending from between the tanks to near the other end, so that a U-shaped In a stacked heat exchanger in which a large number of tube elements each having a heat exchange medium passage of the shape of a shape are stacked with fins interposed therebetween, the heat exchange medium passing through the heat exchange medium passage is placed at the tip of the partition wall in addition to the tube element. The reason is that a guide portion is provided to direct the device toward the end corner.

(Function) Therefore, the heat exchange medium flowing through the heat exchange medium passage is guided by the guide section at the tip of the partition wall toward the other end corner of the tube element, passes near this corner, and makes a U-turn. Therefore, the dead zone of the heat exchange medium described above can be reduced, and therefore the above object can be achieved.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

In FIG. 2, the heat exchanger is constructed by alternately stacking tube elements 1 and corrugated fins 6 in multiple stages.

The tube element 1 is constructed using two molded plates 2 as shown in FIG. 7
A and 7b are followed by passage forming recesses 8, respectively, and as shown in FIG. 3, the tank forming recesses 7a and 7b and the passage forming recess 8 are joined facing each other. Two tanks 3a, 3 at one end
b are arranged in parallel, and a heat exchange medium passage 5 through which a heat exchange medium such as a refrigerant passes is formed in the remaining portion.

This heat exchange medium passage 5 is connected from between the two tanks 3a, 3b to the other end of the tube element 1 by a partition wall 4 formed by joining protrusions 9, 9 formed on both molded plates 2, 2. It is partitioned to the nearest tank, and one tank 3a is separated from the other tank 3a.
It is formed into a U-shape. Further, in this passage 5, a large number of protrusions 10 formed in the passage forming recess 8 protrude toward the other molding plate side.

The protrusion 10 is formed in a cylindrical shape, and has a fourth
As shown in the figure, the top 10a of the protrusion 10 of the other molded plate 2 constituting the tube element 1 has a flat top 10a.
It is connected to 0a. And this protrusion 10
are arranged in a staggered manner throughout the passage forming recess 8 so that the area ratio of the remaining portion of the passage forming recess 8 other than the protrusions is 20 to 10 to 80 to 90. At the same time, the contact area between the remaining part of the passage forming recess 8 and the fin 6 fixed opposite to this recess 8 is increased.

Further, the heat exchange medium passage 5 is provided with guide portions 12 a and 12 b at the tip of the partition wall 4 for directing the heat exchange medium toward the other end corner of the tube element 1 . These guide parts 12a, 12b are
Although it may be provided separately from the partition wall 4, in this embodiment it is formed integrally with the partition wall 4 in a Y-shape or a T-shape as shown in FIG. If the tips of the protrusions 9 are extended in a Y-shape or T-shape, and both protrusions 9 are joined, they can be formed at the same time.

And, such tube element 1 is
Adjacent tube elements 1 are joined at one end by tank forming recesses 7a and 7b and at the other end by a joint 13 formed by bending the molded plate 2, and each tank is connected to a tube in the middle. Communication holes 14 formed in tank forming recesses 7a and 7b except for one tank of the element
a, 14b, and one tank 3a communicates with inlet/outlet joints 15a, 15b attached to both ends of the heat exchanger.

In the above configuration, one inlet/outlet joint 15a
The heat exchange medium flowing into one tank 3a through the heat exchange medium passage 5 formed in the tube element 1, which is about halfway up to the middle, is passed through the partition wall as shown by the dashed line in FIG. 4, it ascends while meandering between the projections 10, is guided by the guide section 12 at the tip of the partition wall 4 toward the other end corner of the tube element 1, and passes near this corner. Make a big U-turn and meander from the other side of passage 5 to the other tank 3b.
leading to. Thereafter, the remaining approximately half of the tube element 1 flows from the other tank 3b to the one tank 3a through a similar flow state, and flows out from the other inlet/outlet joint 15b. As a result, the heat exchange medium passes through almost the entire area of the heat exchange medium passage 5, and heat is exchanged with the air from the passage forming recess 8 through the fins 6.

(Effects of the invention) As described above, according to this invention, a heat exchange A guide part is provided to direct the medium toward the other end corner of the tube element, and the heat exchange medium passes near the other end corner of the tube element and is made to make a U-turn, resulting in more efficient stacked heat exchange. This is what you get.

Further, the guide portion exhibits the same effect as the rib and also serves as reinforcement for the molded plate.

Furthermore, the guide portion serves as a joint surface to be joined during brazing, increasing the joint surface and improving the strength of the tube element.

[Brief explanation of drawings]

Fig. 1 is a front view of a molded plate showing an embodiment of this invention, Fig. 2 is a front view showing the entire heat exchanger,
Fig. 3 is a sectional view showing a tube element used in the heat exchanger described above, Fig. 4 is an enlarged sectional view showing a protrusion formed on a molded plate, and Fig. 5 is an enlarged sectional view showing another embodiment of this invention. FIG. 6 is a front view of a conventional molding plate. 1... Tube element, 3a, 3b... Tank, 4... Partition wall, 5... Heat exchange medium passage, 12
a, 12b... Guide portion.

Claims (1)

[Claims for Utility Model Registration] 1. A tube element in which a plurality of tanks are arranged in parallel at one end, and a partition wall extending from between the tanks to near the other end is formed to form a U-shaped heat exchange medium passage. In the stacked heat exchanger in which a large number of layers are stacked with intervening fins, a guide portion is provided at the tip of the partition wall to direct the heat exchange medium passing through the heat exchange medium passage toward the other end corner of the tube element. A laminated heat exchanger featuring: 2 Utility model registration claim 1 characterized in that the guide portion is formed integrally with the partition wall in a T-shape
Stacked heat exchanger as described in Section 1. 3 Utility model registration claim 1 characterized in that the guide portion is formed integrally with the partition wall in a Y-shape
Stacked heat exchanger as described in Section 1.