JPH0432697A - Lamination type heat exchanger - Google Patents

Abstract

PURPOSE:To achieve a higher heat exchange rate by arranging at least one or more groups of opposed beads so that a path resistance reduces gradually from the inlet side of a heat exchange medium path of a tube element to the outlet side thereof. CONSTITUTION:In a heat exchanger, a heat exchange medium flowing into an inlet tank 50 from an inlet pipe 7 flows through a heat exchange medium path 34 of tube elements 1, while it has heat exchanged with air outside and reaches an outlet tank 52 to be drained at an outlet pipe 9. In this heat exchanger, first, second and third groups 44, 46 and 48 of opposed beads are so arranged as to reduce a path resistance from the inlet side of the heat exchange medium path 34 of the tube element 1 to the outlet side thereof. With such an arrangement, for example, when a heat exchanger is used as evaporator, as the path resistance on the outlet side of the heat exchange medium path 34 is small, a heat exchange medium (refrigerant vapored flows efficiently thereby achieving a higher heat exchange rate of the heat exchanger as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of a laminated heat exchanger mainly used in a vehicle air conditioner.

(Prior art) Generally, this type of laminated heat exchanger (hereinafter referred to as "heat exchanger")
Say. The tube element used in ) is constructed by joining two molded plates in the middle, and has a substantially U-shaped heat exchange medium passage formed therein (for example, as disclosed in Japanese Patent Laid-Open No. 184399 and Japanese Patent Publication No. 1983-1978
(See Publication No. 90).

The molded plates used in the above-mentioned prior art have a structure in which two molded plates are joined together in order to reinforce the tube element and to make the flow of the heat exchange medium in the heat exchange medium passage more efficient. A group of so-called relative beads (dimples and ribs) that protrude inward from the heat exchange medium passage and face each other is provided, and the relative bead group exchanges heat between the contact beads that are in contact with and the non-contact beads that are not in contact with each other. They were arranged in two uniform distributions in the medium path.

(Problem to be Solved by the Invention) However, in the above-mentioned prior art, since the contact beads and non-contact beads are uniformly distributed and arranged in the heat exchange medium passage, the following problem occurs. However, this problem could not be avoided, and the heat exchange rate could not be improved.

The first problem is when the heat exchanger is used as an evaporator, and in that case, the liquid heat exchange medium (refrigerant) that flows into the heat exchange medium passage of the tube element vaporizes at the outlet side. Since the volume increases, it is desirable that the passage resistance on the outlet side be smaller than that on the inlet side, but the passage resistance on the outlet side should be large.

The second problem is that the heat exchange medium is deflected at the turn-back position of the heat exchange medium passage of the tube element.

The third problem is that the end portion of the periphery of the heat exchange medium passage of the tube element creates contact resistance, and the heat exchange medium does not flow efficiently.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a laminated heat exchanger capable of solving the above-mentioned problems and improving heat exchange efficiency.

(Means for Solving the Problems) In order to achieve the above object, a laminated heat exchanger according to the present invention is formed by joining two molded plates in the middle, with one end inside for heat exchange. communicated with the inlet of the medium;
Each forming plate has a substantially U-shaped heat exchange medium passage whose other end communicates with the outlet of the heat exchange medium, and each molded plate is provided with a plurality of relative bead groups protruding inward of the heat exchange medium passage. In a stacked heat exchanger in which tube elements are stacked in multiple stages with fins interposed, the relative bead group includes a contact bead group that comes into contact when the two molded plates are joined, and a corresponding contact bead. At least one group of opposing beads arranged between the groups and facing each other at a predetermined distance, so as to gradually reduce passage resistance from the inlet side to the outlet side of the heat exchange medium passage of the tube element. The at least one or more opposing bead groups are arranged.

Further, the second laminated heat exchanger according to the present invention is formed by joining two molded plates in the middle, one end of which is connected to the inlet of the heat exchange medium, and the other end is connected to the inlet of the heat exchange medium. Each tube element is finned to form a generally U-shaped heat exchange medium passage communicating with an outlet of the exchange medium, and each formed plate is provided with a plurality of opposing bead groups projecting inward of the heat exchange medium passage. In the laminated heat exchanger formed by laminating in multiple stages with consisting of at least one or more opposing bead groups arranged and facing each other at a predetermined distance;
The at least one group of opposing beads is arranged at a folded position of the heat exchange medium passage of the tube element so as to reduce passage resistance at the folded position.

The third laminated heat exchanger according to the present invention is formed by joining two molded plates in the middle, one end of which is connected to the inlet of the heat exchange medium, and the other end of which is connected to the inlet of the heat exchange medium. Each tube element is finned to form a generally U-shaped heat exchange medium passage communicating with an outlet of the exchange medium, and each formed plate is provided with a plurality of opposing bead groups projecting inward of the heat exchange medium passage. In the stacked heat exchanger formed by stacking the two molded plates in multiple stages, the relative bead group faces the contact bead group that comes into contact with the two molded plates at a predetermined distance apart. at least one group of opposed beads, the at least one opposing bead group being arranged at a peripheral edge position of the heat exchange medium passage of the tube element so as to reduce passage resistance at a position of the peripheral edge of the heat exchange medium passage.
This is an arrangement in which three or more opposing bead groups are arranged.

Furthermore, the fourth laminated heat exchanger according to the present invention is formed by joining two molded plates in the middle, one end of which is connected to the inlet of the heat exchange medium, and the other end of which is connected to the inlet of the heat exchange medium. Each tube element is finned to form a generally U-shaped heat exchange medium passage communicating with an outlet of the exchange medium, and each formed plate is provided with a plurality of opposing bead groups projecting inward of the heat exchange medium passage. In the stacked heat exchanger formed by stacking the two molded plates in multiple stages, the relative bead group faces the contact bead group that comes into contact with the two molded plates at a predetermined distance apart. at least one group of opposed beads, the at least one opposing bead group being arranged at a peripheral edge position of the heat exchange medium passage of the tube element so as to reduce passage resistance at a position of the peripheral edge of the heat exchange medium passage.
At least one group of opposing beads is arranged, and at least one other group of opposing beads is arranged so as to reduce passage resistance from the inlet side to the outlet side of the heat exchange medium passage of the tube element. This is what I did.

(Function) Therefore, in the invention according to claim 1, the passage resistance on the outlet side of the heat exchange medium passage of the tube element is made smaller than that on the inlet side, and when this stacked heat exchanger is used as an evaporator, Therefore, it is possible to improve the heat exchange rate.

In the invention according to claim 2, the passage resistance at the folded position of the heat exchange medium passage of the tube element is reduced, so that drifting of the heat exchange medium at the folded position is avoided,
As a result, the heat exchange rate can be improved.

Further, in the invention according to claim 3, the passage resistance at the periphery of the heat exchange medium passage of the tube element is reduced,
Thereby, the heat exchange medium flows efficiently on the end side of the heat exchange medium passage, and it is possible to improve the heat exchange efficiency.

In the fourth aspect of the invention, the position of the periphery of the heat exchange medium passage of the tube element and the passage resistance from the inlet side to the outlet side are reduced, thereby reducing the heat exchange medium passage as a whole. The exchange medium flows efficiently and the heat exchange rate can be improved.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a laminated heat exchanger (hereinafter referred to as
It's called a "heat exchanger." ) is shown, and the heat exchanger has tube elements 1 and corrugated fins 3 stacked alternately in multiple stages, and end plates 5, 5 are arranged at both ends in the stacking direction, An inlet vibe (or outlet vibe) 7 and an outlet vibe (or inlet vibe) 9 for the heat exchange medium are arranged side by side on one side of the end plate 5, and these are assembled by brazing them together in a furnace. ing.

The tube element 1 is constructed by joining two molded plates 12, shown in detail in FIG. 2, in the middle.

The molded plate 12 has a substantially rectangular shape, and a pair of grooves 18.20 having a substantially elliptical opening 14.16 are formed at one longitudinal end thereof (projecting toward the front side in the figure). ), a protrusion 22 extends from between the grooves 18, 20 toward the other end, and a substantially U-shaped groove 24 communicating with the groove 18.20 is provided on the periphery surrounding the protrusion 22. A bulge is formed in the groove portion 24, and a relative bead group 40, which will be described later, is formed in the groove portion 24.
is provided. Further, on the edge of the other end of the molding plate 12, for example, three tube element abutting portions 26 are formed to protrude.

The tube element 1 is constructed by joining two molded plates 12 in the middle, and inside the tube element 1, a tank portion 30.32 is formed from a pair of opposing groove portions 18.20, and a tank portion 30.32 is formed from a pair of opposing groove portions 24 in a substantially U-shape. heat exchange medium passage 34
is constructed, and the heat exchange medium passage 34 and the tank portion 30.32 communicate with each other.
0 and the tank section 32 serve as an inlet section and an outlet section of the heat exchange medium passage 34, respectively.

Here, the relative bead group 4 provided on the molding plate 12
Let's talk about 0.

As shown in detail in FIGS. 2 and 3, the relative bead group 40 includes an abutment bead group 42 formed by arranging a plurality of abutment beads 42a (indicated by ◎), and a first opposing bead 44.
a first opposed bead group 44 made up of a plurality of arranged beads a (indicated by a circle), a second opposed bead group 46 made up of a plurality of second opposed beads 46a (indicated by a black mark), A third opposing bead group 48 formed by arranging a plurality of three opposing beads 48a (indicated by *) is provided in the groove 24 of the molding plate 12 in a staggered manner.

The contact bead 42a is formed to protrude inward of the heat exchange medium passage 34, and its protruding length is set to approximately 1/2 of the thickness A of the heat exchange medium passage 34. That is, the corresponding contact beads 42a are arranged such that when the two molding plates 1-12 are joined, the opposing beads 42a come into contact with each other. A contact bead group 42 formed by arranging a plurality of such contact beads 42a is uniformly arranged in the groove portion 24.

The first opposing bead 44a is formed to protrude inward of the heat exchange medium passage 34, and its protruding length is set to, for example, 3/4 of the protruding length of the abutment bead 42a. That is, the first opposing beads 44a are separated by a predetermined distance B between the two molded plates 12 when they are joined together. A first opposed bead group 44 formed by arranging a plurality of such first opposed beads 44a is disposed between the abutting bead groups 42 on the inlet side of the groove portion 24 (the inlet side of the heat exchange medium passage 34). has been done.

The second opposing bead 46a is formed to protrude inward from the heat exchange medium passage 34, and its protruding length is set to, for example, 1/2 of the protruding length of the abutment bead 42a. That is, the second opposing beads 46a are spaced apart by a predetermined distance C between opposing beads when the two molded plates 12 are joined. A second opposing bead group 46 formed by arranging a plurality of second opposing beads 46a is located at the folded position of the groove portion 24 (the folded position of the heat exchange medium passage 34) and between the abutting bead groups 42. It is arranged in

The third opposing bead 48a is formed to protrude inward from the heat exchange medium passage 34, and its protruding length is set to, for example, 1/4 of the protruding length of the abutment bead 42a. That is, the third facing beads 48a are spaced apart by a predetermined distance between the two molded plates 12 that face each other when they are joined. A first opposed bead group 48 formed by arranging a plurality of third opposed beads 48a is disposed between the abutment bead groups 42 on the exit side of the groove 24 (the exit side of the heat exchange medium passage 34). has been done.

Here, the above-mentioned 1st case when two molded plates 12 are joined. Second. Regarding the relationship between the lengths of the gaps B, C, and D of the third opposing beads 44a, 46a, 48a, the gap B
, C, and D are set so that B<C<D.

The relative bead group 40 projects into the heat exchange medium passage 34 when the two forming plates 12 are joined to form the tube element 1.

The contact bead groups 42 are brought into contact with each other, reinforcing the tube element 1 and acting so that the heat exchange medium flows uniformly within the heat exchange medium passage 34. Also, 1st. Second. Third opposing bead group 44, 46.
48 indicates gaps B, C, and D of a predetermined distance between opposing members.
are formed, and act to equalize the flow of the heat exchange medium in the same way as the abutment bead group 42, but each opposing bead group sets passage resistance at various points in the heat exchange medium passage 34 by the gaps formed therebetween. are doing. That is, the larger the gap between the opposing bead groups, the smaller the passage resistance of the heat exchange medium passage 34 at the position where the opposing bead group is arranged. Therefore, since the gaps BC and D are set so that B<C<D, the first opposing bead group 44 is arranged in the path from the inlet side to the outlet side of the heat exchange medium passage 340. the second opposing bead group 46 from the inlet side
The passage resistance at the folded position where is arranged is small, and the passage resistance on the exit side where the third opposing bead group 48 is disposed is smaller than this folded position.

That is, the tube element 1 having the relative bead group 40 is set so that the passage resistance within the heat exchange medium passage 34 gradually decreases from the inlet side to the outlet side.

As shown in FIG. 1, in the tube element 1 having the above structure, the tank parts 30 and 32 and the tube element abutting parts 26 are brought into contact with each other between adjacent tube elements, and the fins 3 are placed in the gaps between them. They are interposed and stacked in multiple stages. And the stacked tank parts 30.32
are communicated through their openings 14.16 and constitute an inlet tank 50 and an outlet tank 52. This inlet tank 5
One end of the 0 and outlet tank 52 is communicated with the inlet vibe 7 and the outlet vibe 9 through passage holes 54 and 56 formed in one end plate 5, and the other end is closed by the other end plate 5. It is designed to be able to be removed.

The heat exchanger with such a configuration has a structure in which the inlet vibrator 7 is connected to the inlet tank 5.
The heat exchange medium flowing into each tube element 1
The air flows through the heat exchange medium passage 34 during which it exchanges heat with the outside air, reaches the outlet tank 52, and is discharged from the outlet vibe 9.

In this heat exchanger, as described above, the first passage resistance is gradually reduced from the inlet side to the outlet side of the heat exchange medium passage 34 of the tube element 1.
．． Second. Third opposing bead groups 44, 46, and 48 are arranged. As a result, when the heat exchanger is used as an evaporator, for example, the passage resistance on the outlet side of the heat exchange medium passage 34 is small, so the vaporized heat exchange medium (
Refrigerant) flows efficiently, improving the heat exchange efficiency of the entire heat exchanger.

Next, the second and third embodiments will be described with reference to FIGS. 4 and 5. However, components having the same configuration as those of the first embodiment described above are given the same reference numerals, and the explanation thereof will be omitted, and only the different points will be explained below.

The heat exchangers according to the second and third embodiments are the same as those in the first embodiment.
The only difference from the embodiment described above is the arrangement of the relative beads 40 of the molding plate 12, and the arrangement will be described below in order.

In the second embodiment shown in FIG. 4, the groove 24 of the molding plate 12 has an abutment bead 42a (indicated by
A contact bead group 42 consisting of a plurality of arrayed second opposing beads 46a (indicated by ■) and a second opposing bead group 46 consisting of a plurality of second opposing beads 46a (indicated by ■) are provided in a staggered manner. The bead group 42 and the second opposing bead group 46 constitute a two-stage relative bead group 40. Among these, the abutment bead group 42 is uniformly provided in the groove 24, but the second opposing bead group 46 is between the abutment bead group 42 from the approximate center of the folded position of the groove 24 to the exit side. It is provided.

In the third embodiment shown in FIG. 5, the groove 24 of the molding plate 12 has an abutment bead 42a (indicated by
a first opposing bead group 44 consisting of a plurality of first opposing beads 44a (indicated by a circle), and a second opposing bead 46a (indicated by a ■). ) are arranged in a staggered manner, and the corresponding contact bead group 42 and the first .
A three-stage relative bead group 40 is constituted by the second opposing bead group 44 and 46. Among these, the abutment bead groups 42 are uniformly provided in the groove 24, but the first opposing bead group 44 is provided between the abutment bead groups 42 at the folded position of the groove 24. , second opposing bead group 46
is located on the exit side of the groove portion 24 and is provided between the abutment bead groups 420.

Note that the contact bead 42a, the first and second opposing beads 44
The protruding lengths of a and 46a are the same as in the first embodiment described above (see FIG. 3).

The operation and effect of the heat exchanger having the tube element 1 formed by joining two molded plates 12 shown in the second and third embodiments described above are the same as in the first embodiment described above, and the tube element The passage resistance from the inlet side to the outlet side of the first heat exchange medium passage 34 is gradually reduced.

In addition to this, although not shown, it is possible to construct a heat exchanger having the same effects as described above by changing the arrangement of the opposing bead groups in various ways.

Next, an embodiment of the heat exchanger according to the second aspect of the invention will be described with reference to FIGS. 6 to 8. However, those having the same configuration as the heat exchanger according to the invention according to claim 1 described above are given the same reference numerals, and the explanation thereof will be omitted.
Only the different points will be explained.

The heat exchanger according to this embodiment differs from the one according to the invention according to claim 1 described above only in the arrangement configuration of the relative beads 40 of the molded plate 12.
．． Second. A third example will be described.

In the first embodiment shown in FIG.
A contact bead group 42 consisting of a plurality of arrayed second opposing beads 46a (indicated by ■) and a second opposing bead group 46 consisting of a plurality of second opposing beads 46a (indicated by ■) are provided in a staggered manner. The bead group 42 and the second opposing bead group 46 constitute a two-stage relative bead group 40. Of these, the abutment bead groups 42 are uniformly provided in the groove 24, but the second opposing bead group 46 is provided between the abutment bead groups 420 at the folded position of the groove 24. There is.

In the second embodiment shown in FIG.
a first opposing bead group 44 consisting of a plurality of first opposing beads 44a (indicated by a circle), and a second opposing bead 46a (indicated by a ■). A second opposed bead group 46 is arranged in a staggered manner, and the corresponding contact bead group 42 and the first opposing bead group 46 are arranged in a staggered manner.
．． A three-stage relative bead group 40 is constituted by the second opposing bead group 44 and 46. Of these, the contact bead group 42
are uniformly provided in the groove 24, but the first and second opposing bead groups 44, 46 are provided between the contact bead groups 420 at the folded positions of the groove 24.
The opposing bead group 44 is arranged on the outside thereof, and the second opposing bead group 46 is arranged on the inside thereof.

In the third embodiment shown in FIG. 8, the groove 24 of the molding plate 12 has an abutment bead 42a (indicated by
a first opposing bead group 44 consisting of a plurality of first opposing beads 44a (indicated by circles); and a second opposing bead group 46a (indicated by ■). A second opposing bead group 46 consisting of a plurality of arranged beads (as shown) and a third opposing bead group 48 consisting of a plurality of third opposing beads 48a (indicated by *) are arranged in a staggered manner. , the corresponding contact bead group 42 and the first. Second. The third opposing bead groups 44, 46, and 48 constitute a four-stage relative bead group 40. Among these, the contact bead groups 42 are uniformly provided in the groove portion 24, and the first. Second. The third opposing bead group 44, 46° 48 is provided between the abutting bead groups 420 at the folded position of the groove portion 24, and the first opposing bead group 44 is outwardly connected to the third opposing bead group 46°. The group 48 is arranged on the inside, and the second group 46 of opposed beads is located between the first group 44 and the third group 48 of opposed beads.

Note that the contact bead 42a, the first. Second. The protruding lengths of the third facing beads 44a, 46a, 48a are similar to those of the molding plate 12 according to the invention described in claim 1 (see FIG. 3).

A tube element 1 formed by joining two molded plates 12 shown in the first, second, and third embodiments described above.
In this case, at least one group of opposing beads having a predetermined gap are arranged at the folded position of the heat exchange medium passage 34, so that the passage resistance at the folded position of the heat exchange medium passage 34 is reduced, and the heat exchange medium is Stray currents are avoided. Thereby, the heat exchanger can improve the heat exchange efficiency.

In addition to this, although not shown, it is possible to construct a heat exchanger having the same effects as described above by changing the arrangement of the opposing bead groups in various ways.

Next, an embodiment of the heat exchanger according to the third aspect of the invention will be described with reference to FIGS. 9 to 11. However, those having the same configuration as the heat exchanger according to the invention according to claim 1 described above will be given the same reference numerals and the explanation thereof will be omitted, and only the different points will be explained below.

The heat exchanger according to this embodiment differs from the one according to the invention according to claim 1 described above only in the arrangement configuration of the relative beads 40 of the molded plate 12.
．． Second. A third example will be described.

In the first embodiment shown in FIG. 9, the groove 24 of the molding plate 12 has an abutment bead 42a (indicated by
A contact bead group 42 consisting of a plurality of arrayed second opposing beads 46a (indicated by ■) and a second opposing bead group 46 consisting of a plurality of second opposing beads 46a (indicated by ■) are provided in a staggered manner. The bead group 42 and the second opposing bead group 46 constitute a two-stage relative bead group 40. Among these, the abutment bead group 42 is provided uniformly in the groove 24, but the second opposing bead group 46 is provided at the periphery of the groove 24.

In the second embodiment shown in FIG. 10, the groove 24 of the molding plate 12 has a contact bead group 42 formed by arranging a plurality of contact beads 42a (indicated by ◎), and a first opposing bead group 42. A first opposed bead group 44 made up of a plurality of arranged beads 44a (indicated by a circle) and a second opposed bead group 46 made up of a plurality of second opposed beads 46a (indicated by a black mark) are arranged in a staggered manner. The corresponding contact bead group 42 and the first .
A three-stage relative bead group 40 is constituted by the second opposing bead group 44 and 46. Among these, the abutment bead group 42 is provided uniformly in the groove 24, but the first opposing bead group 44 is provided at the periphery of the groove 24 from the entrance side of the groove 24 to approximately the center of the folding position. The second opposing bead group 46 is provided at the periphery of the groove 24 from the exit side of the groove 24 to approximately the center of the folding position.

In the third embodiment shown in FIG. 11, the groove 24 of the molding plate 12 includes a contact bead group 42 formed by arranging a plurality of contact beads 42a (indicated by ◎ marks), and a first opposing bead group 42 44a (indicated by a circle).
The opposing bead group 44 and the second opposing bead 46a (■
A second opposing bead group 46 is formed by arranging a plurality of beads (indicated by marks).
and a third opposing bead group 48a (indicated by a *) are provided in a staggered manner, and the corresponding contacting bead group 42 and the first . Second. Third opposing bead group 44°4
6.48 constitutes a four-stage relative bead group 40. Among these, the contact bead group 42 is uniformly provided in the groove 24, the first opposing bead group 44 is provided on the periphery of the entrance side of the groove 24, and the second opposing bead group 46 is provided on the folded back of the groove 24. At the periphery of the position, the third opposing bead group 48 is formed in the groove 2
4 are respectively arranged on the periphery of the outlet side.

Note that the contact bead 42a, the first. Second. The protruding lengths of the third facing beads 44a, 46a, 48a are similar to those of the molding plate 12 according to the invention described in claim 1 (see FIG. 3).

A tube element 1 formed by joining two molded plates 12 shown in the first, second, and third embodiments described above.
is provided with at least one group of opposing beads having a predetermined gap at the periphery of the heat exchange medium passage 34, thereby reducing passage resistance at the periphery of the heat exchange medium passage 34. The heat exchange medium is designed to efficiently flow through the end side of 34. Thereby, the heat exchanger can improve the heat exchange efficiency.

In addition to this, although not shown, it is possible to construct a heat exchanger having the same effects as described above by changing the arrangement of the opposing bead groups in various ways.

Next, an embodiment of the heat exchanger according to the invention set forth in claim 4 will be described with reference to FIG. However, those having the same configuration as the heat exchanger according to the invention according to claim 1 described above will be given the same reference numerals and the explanation thereof will be omitted, and only the different points will be explained below.

The heat exchanger according to this embodiment differs from the heat exchanger according to the first aspect of the invention described above only in the arrangement of the relative beads 40 of the molded plate 12, which will be described below.

In the groove portion 24 of the molding plate 12 shown in FIG.
A contact bead group 42 formed by arranging a plurality of abutment beads 42a (indicated by ◎ marks), a first opposing bead group 44 formed by arranging a plurality of first opposing beads 44a (indicated by ○ marks), A second opposing bead group 46 formed by arranging a plurality of second opposing beads 46a (indicated by ■ marks), and a third opposing bead 48a
A third opposing bead group 48 (indicated by a *) is provided in a staggered manner, and the corresponding contacting bead group 48 is arranged in a staggered manner.
2 and 1st. Second. A four-stage relative bead group 40 is constituted by the third opposing bead group 44 and 4648. Among these, the abutment bead groups 42 are uniformly provided in the groove 24, and the first opposing bead group 44 is located on the inlet side and the outlet side of the groove 24, and is located between the abutment bead groups 440. The second opposed bead group 46 is disposed at the folded position of the groove 24, and the third opposed bead group 48 is disposed at the circumferential edge of the groove 24.

Note that the contact bead 42a, the first. Second. The protruding lengths of the third facing beads 44a, 46a, 48a are similar to those of the molding plate 12 according to the invention described in claim 1 (see FIG. 3).

The tube element 1 formed by joining two molded plates 12 described above is provided with a plurality of opposing bead groups having a predetermined gap at the periphery of the heat exchange medium passage 340 and along the path from the inlet side to the outlet side. As a result, the passage resistance within the heat exchange medium passage 34 is reduced, allowing the heat exchange medium to flow efficiently. Thereby, the heat exchanger can improve the heat exchange efficiency.

In addition to this, although not shown, it is possible to construct a heat exchanger having the same effects as described above by changing the arrangement of the opposing bead groups in various ways.

(Effects of the Invention) As described above, according to the present invention, groups of opposed beads are arranged at appropriate positions on the path of the heat exchange medium passage of the tube element so as to reduce the passage resistance in the heat exchange medium passage. The heat exchange medium efficiently flows through the heat exchange medium passage, thereby improving the heat exchange efficiency of the heat exchanger.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a laminated heat exchanger, Fig. 2 is a plan view of a molded plate of the first embodiment used in the laminated heat exchanger according to the invention as claimed in claim 1, and Fig. 3 is a tube An explanatory diagram showing the cross-sectional structure of the element, FIG. 4 is a plan view of a molded plate of the second embodiment used in the laminated heat exchanger according to the invention as claimed in claim 1, and FIG. Plan view of the molded plate of the third embodiment used in the exchanger, No. 6
The figure is a plan view of a molded plate of the first embodiment used in the laminated heat exchanger according to the invention as claimed in claim 2, and FIG. FIG. 8 is a plan view of a molded plate according to the third embodiment used in the above laminated heat exchanger, and FIG. 9 is a plan view of a laminated heat exchanger according to the invention as claimed in claim 3. FIG. 10 is a plan view of a molded plate of the second embodiment used in the above laminated heat exchanger, and FIG. 11 is a plan view of the molded plate of the second embodiment used in the same laminated heat exchanger. FIG. 12 is a plan view of a molded plate used in a laminated heat exchanger according to the fourth embodiment of the invention. 1...Tube element, 3...Fin, 12.
... Molding plate, 24... Groove, 34... Heat exchange medium passage, 40... Relative bead group, 42 a -0° abutting bead, 42... Abutting bead group, 44a... First opposing bead, 44...First opposing bead group, 46
a... Second opposing bead, 46... Second opposing bead group, 48a... Third opposing bead, 46... Third
group of opposing beads. 10 rl! J Figure 11 4th

Claims (4)

[Claims] 1.It is made by joining two molded plates in the middle,
A substantially U-shaped heat exchange medium passage is formed in the inside thereof, one end of which communicates with the inlet of the heat exchange medium, and the other end of which communicates with the outlet of the heat exchange medium, and a heat exchange medium passage is formed in each molded plate. In the stacked heat exchanger, each tube element is stacked in multiple stages with fins interposed, each tube element having a plurality of relative bead groups protruding inwardly, wherein the relative bead groups are formed by joining the two molded plates. At least one abutment bead group that is sometimes brought into contact and at least one abutment bead group that is arranged between the abutment bead group and facing each other at a predetermined distance.
consisting of three or more opposing bead groups, so as to gradually reduce passage resistance from the inlet side to the outlet side of the heat exchange medium passage of the tube element,
A laminated heat exchanger characterized in that the at least one or more opposing bead groups are arranged. 2. It is made by joining two molded plates in the middle,
A substantially U-shaped heat exchange medium passage is formed in the inside thereof, one end of which communicates with the inlet of the heat exchange medium, and the other end of which communicates with the outlet of the heat exchange medium, and a heat exchange medium passage is formed in each molded plate. In the stacked heat exchanger, each tube element is stacked in multiple stages with fins interposed, each tube element having a plurality of relative bead groups protruding inwardly, wherein the relative bead groups are formed by joining the two molded plates. At least one abutment bead group that is sometimes brought into contact and at least one abutment bead group that is arranged between the abutment bead group and facing each other at a predetermined distance.
The at least one opposing bead group is arranged at a turn-back position of the heat exchange medium passage of the tube element so as to reduce passage resistance at the turn-back position. A laminated heat exchanger characterized by: 3.It is made by joining two molded plates in the middle,
A substantially U-shaped heat exchange medium passage is formed in the inside thereof, one end of which communicates with the inlet of the heat exchange medium, and the other end of which communicates with the outlet of the heat exchange medium, and a heat exchange medium passage is formed in each molded plate. In the stacked heat exchanger, each tube element is stacked in multiple stages with fins interposed, each tube element having a plurality of relative bead groups protruding inwardly, wherein the relative bead groups are formed by joining the two molded plates. The heat exchange medium passage comprises a contact bead group that sometimes comes into contact with each other, and at least one or more opposing bead group that opposes each other at a predetermined distance, and the heat exchange medium passage is located at a peripheral edge of the heat exchange medium passage of the tube element. 1. A laminated heat exchanger, characterized in that the at least one or more opposing bead groups are arranged so as to reduce passage resistance at a peripheral edge position of the laminated heat exchanger. 4.It is made by joining two molded plates in the middle,
A substantially U-shaped heat exchange medium passage is formed in the inside thereof, one end of which communicates with the inlet of the heat exchange medium, and the other end of which communicates with the outlet of the heat exchange medium, and a heat exchange medium passage is formed in each molded plate. In the stacked heat exchanger, each tube element is stacked in multiple stages with fins interposed, each tube element having a plurality of relative bead groups protruding inwardly, wherein the relative bead groups are formed by joining the two molded plates. The heat exchange medium passage comprises a contact bead group that sometimes comes into contact with each other, and at least one or more opposing bead group that opposes each other at a predetermined distance, and the heat exchange medium passage is located at a peripheral edge of the heat exchange medium passage of the tube element. The at least one or more opposing bead groups are arranged so as to reduce the passage resistance at a position around the circumference of the tube element, and the passage resistance from the inlet side to the outlet side of the heat exchange medium passage of the tube element is reduced. A laminated heat exchanger characterized in that the at least one other opposing bead group is arranged.