JPH03144290A - Lamination type heat exchanger - Google Patents

Abstract

PURPOSE:To prevent the deformation of tube elements and corrugate fins upon laminating by a method wherein reinforcing members are provided between the short corrugate fins and the tube elements, having the same width but different lengths. CONSTITUTION:The title heat exchanger is provided with reinforcing members 5, connected in parallel to the lower ends of second corrugate fins 22 among first and second corrugate fins 21, 22, having different length in up--and-down direction and neighboring to each other, while both ends 51, 52 thereof are connected integrally by bonding downward along the side surfaces of first and second tube elements 111, 112 connected to both sides of the second corrugate fins 22. Both ends 51, 52 of the reinforcing member 5 are connected and fixed to the neighboring two tube elements 111, 112 whereby the tube element 11 and the corrugate fin 2 are reinforced by the reinforcing member 5 and will never be deformed. According to this method, the title heat exchanger will never be deformed upon lamination even when the length in the up-and-down direction of some corrugate fins of the lamination type heat exchanger are shortened and steps are provided between the lower ends thereof.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a stacked heat exchanger.

[Prior Art] As shown in FIGS. 7 and 8, a pair of cylindrical main reciprocating conduit sections 121 that are approximately rectangular and penetrate through the upper part in the thickness direction have conventionally been used.
A laminated heat exchanger is known that has tube plates as constituent elements. This tube plate 12 has an outer peripheral edge 124 bent, and a partition rib 125 extends from the top to the center in the vertical direction to form one main reciprocating pipe section 1.
Refrigerant passage 12 leading from 21 to another main reciprocating pipe section 121
2 is formed.

As shown in FIG. 9, this laminated heat exchanger has a pair of tube plates 12 facing each other in the central part excluding both ends, and both ends are connected to the main reciprocating pipe section 121 and downward. A tube body part 1 in which a main reciprocating passage 10 is formed by stacking a large number of tube elements 11 each forming an extending refrigerant passage 122 (FIG. 7) and connecting a main reciprocating conduit part 121 to the upper part.
and a large number of corrugated fins 21 interposed between adjacent tube elements 11. This tube element 11 and corrugated fin 2
1 and 1, the lower end 123 of the tube plate 12 constituting the tube element 11 is bent and brazed to the lower end of the adjacent tube element to prevent the tube element 11 and the corrugated fin 21 from deforming. It is well known that methods of increasing strength are employed.

On the other hand, when installing this laminated heat exchanger in a vehicle, etc., the vertical length of some tube elements 11 and corrugated fins 21 should be adjusted to improve legroom and to prevent interference with other equipment. You will need one that is short and has a step at the bottom.

[Problems to be Solved by the Invention] However, when stacking the tube elements 11 and corrugated fins 21 of the stacked heat exchanger having a step at the lower end as described above, the long tube elements 11 that are adjacent to each other are
The method of bending the lower end of the tube plate 12 and brazing it to the adjacent tube elements 11 cannot be adopted between the short tube elements 11 and the tube elements 11 and the corrugated fins 21 are deformed in the stacking process. There were drawbacks.

The present invention has been devised in view of the above drawbacks, and is a laminated heat exchanger in which the tube element 11 and the corrugated fins 21 are not easily deformed even if the tube elements 11 and the corrugated fins 21 are stacked with a step provided at the lower end. The technical challenge is to provide equipment.

[Means for Solving the Problems] Each of the laminated heat exchangers of the present invention has a pair of tube plates joined to face each other, and a cylindrical main reciprocating pipe section that penetrates the tube plates in the thickness direction. A large number of tube elements each having a refrigerant passage connected to the main reciprocating pipe section and extending downward are stacked on each other, and the main reciprocating pipe section is connected to the upper part to form the main reciprocating pipe. and a large number of corrugated fins interposed between adjacent tube elements. A laminated heat exchanger according to the first aspect of the present invention is characterized in that the lower ends of the tube elements and corrugate fins having the shorter length among the adjacent tube elements and the corrugate fins having different lengths in the vertical direction are provided. A reinforcing member is provided which is bent downward and integrally joined along the side surface of each tube element which is arranged parallel to the tube element and which is joined to both ends of the short corrugated fin. It is characterized by

Further, in the laminated heat exchanger of the second invention, among the adjacent corrugated fins having different lengths in the vertical direction, the shorter corrugated fin is joined to the side opposite to the longer corrugated fin. The tube plate is integrally formed below a portion forming the refrigerant passage with the other tube plate forming a pair, and is bent laterally and arranged parallel to the lower end of the short corrugated fin. and a side surface of the tube element that is formed integrally with the horizontal reinforcement section, is bent downward, and is located between the adjacent corrugated fins having different lengths in the vertical direction. It is characterized by having a reinforcing part consisting of a vertical reinforcing part.

In the stacked heat exchanger according to the third aspect of the invention, the tube elements between the adjacent corrugated fins having different lengths in the vertical direction are provided as a pair of tube elements having different lengths in the vertical direction corresponding to the lengths of the adjacent corrugated fins. The tube plate is characterized by being comprised of a long central reinforcing plate interposed between the pair of tube plates and corresponding to the long tube plate.

[Function] In the laminated heat exchanger of the first invention, the reinforcing member is provided between tube elements having the same width as the short corrugated fin and different lengths, and both ends thereof are bonded and fixed to these tube elements. Therefore, the surface portion of the thin tube plate of the tube element is reinforced, and the tube element and corrugated fin are not deformed during stacking.

In the laminated heat exchanger of the second invention, since the horizontal reinforcement part and the vertical reinforcement part that constitute the reinforcement part are formed integrally with the tube plate, the parts where brazing is required are between the vertical reinforcement part and the tube element. The brazing process requires only a few steps. In general, since the vertical reinforcing portion reinforces the thin tube plate of the tube element, the tube element and the corrugated fin will not be deformed during stacking.

The laminated heat exchanger of the third invention is easy to assemble because the central reinforcing plate is simply interposed between the pair of tube plates. Furthermore, when the long tube plate is stacked, the load from the short tube plate is uniformly applied to the entire tube plate through the central reinforcing plate, so the tube elements and corrugated fins are not deformed. .

[First Example] As shown in FIG. 1, the laminated heat exchanger of this example includes a tube body portion 1 in which a large number of tube elements 11 are laminated, and a tube element 11 interposed between adjacent tube elements 11. The main component is a large number of corrugated fins 2.

The tube element 11 is obtained by integrally brazing two tube plates 12 shown in FIGS. 7 and 8 facing each other.

The tube plate 12 is made of a metal plate with excellent thermal conductivity. The tube plate 12 has a substantially rectangular shape and has a pair of cylindrical main reciprocating conduit sections 121 extending through the tube plate 12 in the thickness direction at its upper portion. Also, the outer peripheral edge 1 of this tube plate 12
24 is bent, and a partition rib 125 extends vertically from the top to the center, forming one main reciprocating conduit section 121.
A refrigerant passage 122 is formed from the main reciprocating pipe section 121 to another main reciprocating pipe section 121. Further, a large number of short chairs 7126 for stirring the refrigerant are provided on the surface forming the refrigerant passage 122. This tube plate 12 is formed by press working.

Roughly speaking, the lower end of the tube plate 12 is bent to form a reinforcing rib 123. As shown in FIG. 8(b), this reinforcing rib 123 has a rectangular shape integral with two main bodies extending intermittently in the lateral direction.

As shown in FIG. 1, the laminated heat exchanger of the first embodiment including the tube element 11 described above has a first tube element 111 having a long length and a second tube element 112 having a short length. The first shortening of the length
Corrugated fin 21, third corrugated fin 23, second corrugated fin 22, fourth corrugated fin 24, long first side plate 31, long end plate A1 short end plate B, length It consists of a short second side plate 32, an inflow cup 41, an outflow cup 42, and a reinforcing member 5.

Each of the first tube elements 111 has two adjacent tube elements.
The sheets are laminated with a first corrugated fin 21 interposed between them. First tube element 11 at one end
1, second corrugated fins 22 and second tube elements 112 are alternately stacked. A main reciprocating pipe section 121 is connected to the upper part of each tube element 111, 112 to form a main reciprocating path 10, and an inflow cup 41 is a branch in the outward path of this main reciprocating path 10, and an outflow cup 42 is a branch in the return path. They are fixed on the plate 43 and communicated with each other.

Further, at the lower end of each tube element 111.112, the reinforcing rib 123 is symmetrically brazed to each adjacent tube element 111.112, except for between the adjacent first tube element 111 and second tube element 112. ing.

An end plate A and a third corrugated fin 23 are brazed to the side ends of the stacked first tube element 111. Further, a fourth full gate fin 24 of the end plate B1 is brazed to the second tube element 112 at the opposite side end.

The first and second side plates 31 and 32 have upper and lower portions bent in the lateral direction, and the ends thereof are bent upward and downward, respectively.The first side plate 31 covers the third corrugated fin 23, and the second The side plates 32 are laminated to cover the fourth corrugated fins 24, and their extreme ends are fixed to end plates A and B by brazing, respectively. Further, the reinforcing member 5 will be described later.

The assembly procedure of this embodiment is to first place the third corrugated fin 23 on the first side plate 31, and then alternately stack the end plate A, the first tube element 111, and the first corrugated fin 21 thereon. At this time, a refrigerant inlet cup 41 is provided on one side of the pair of main reciprocating paths 10 formed by the pair of cylindrical main reciprocating pipe sections 121, and an outflow cup 42 is provided on the other side. Then, a second corrugated fin 22 and a second corrugated fin 22 are placed on top of the first tube element 111 at the end.
Tube elements 112 are stacked alternately. and,
The end plate B1 fourth corrugated fin 24 is placed on the second tube element 112 at the end, and finally the second
The side plates 32 are placed and brazed together. At this time, the aforementioned reinforcing ribs 123 are joined to the lower ends of the adjacent tube elements 11 to maintain their strength. However, reinforcing ribs 123 are cut between the adjacent first tube element 111 and second tube element 112. Therefore, the strength between the adjacent first tube element 111 and second tube element 112 is originally weakened. Therefore,
In this embodiment, adjacent first,
The second corrugated fin 21.22 is joined parallel to the lower end of the second corrugated fin 22, and both end portions 51.52
The reinforcing member 5 is bent downward along the side surfaces of the first and second tube elements 111 and 112, which are joined to both sides of the second corrugated fin 22, and are integrally joined.
has been established. Since both ends 51 and 52 of this reinforcing member 5 are bonded and fixed to the two adjacent tube elements 111 and 112, the tube element 11 and the corrugated fin 2 are reinforced by the reinforcing member and do not deform.

The reinforcing member 5 is not limited to a U-shaped cross section as shown in FIGS. 2(a) and 2(b), but also has a rectangular cross section as shown in FIG. 2(C), or a A pentagonal cross section as shown in Figure (d) can also be adopted. In addition, this reinforcing member 5
The can be provided with slits to improve drainage and ribs to increase strength.

[Second Embodiment] As shown in FIG. 3, the stacked heat exchanger of this embodiment includes a tube body portion 1 in which a large number of tube elements 11 are stacked, and a tube element 11 interposed between adjacent tube elements 11. It consists of a large number of corrugated fins 2.

The tube element 11 is obtained by integrally brazing two tube plates 12 similar to those of the first embodiment, facing each other and brazing them together.

The difference from the laminated heat exchanger of the first embodiment is that the reinforcing member 5 is not used, and as shown in FIG. A short tube plate 12 and a modified tube plate 13 whose tip is bent in the horizontal direction to form a horizontal reinforcement part 131 and whose tip is further bent in the vertical direction to form a vertical reinforcement part 132.
The method is to use a deformed tube element 14 which is made by facing each other and integrally brazing them together.

In the assembly procedure of this embodiment, first, the third corrugated fin 23 is placed on the first side plate 31, and the end plate A, the first tube element 111, and the first corrugated fin 21 are alternately stacked thereon. At this time, a refrigerant inlet cup 41 is provided on one side of the pair of main reciprocating paths 10 formed by the pair of cylindrical main reciprocating pipe sections 121, and an outflow cup 42 is provided on the other side. Then, the second corrugated fin 22 is placed on the first tube element 111 at the end, and the irregularly shaped tube element 14 is placed thereon. Then, the second corrugated fins 22 and the second tube elements 112 are alternately stacked on the irregularly shaped tube elements 14. And the second tube element 112 at the end
The end plate B and the fourth corrugated fin 24 are placed thereon, and finally the second side plate 32 is placed thereon, and these are brazed together. At this time, the lower ends of adjacent tube elements 11 having the same length are connected to the aforementioned reinforcing ribs 12.
3 are joined to maintain strength. Further, between the adjacent deformed tube element 14 and the first tube element 111, a vertical reinforcement part 132 is joined to the longer tube element 111 via a horizontal reinforcement part 131. This vertical reinforcement part 132
Since the tube element 11 and the corrugated fin 2 are bonded and fixed to the tube element 111, the tube element 11 and the corrugated fin 2 do not deform.

The horizontal reinforcement part 131 and the vertical reinforcement part 132 are provided with slits to improve drainage, and to increase strength.
Ribs can be provided.

Third Embodiment As shown in FIG. 5, the laminated heat exchanger of this embodiment has a tube body section 1 in which a large number of tube elements 11 are laminated, and a tube element 11 interposed between adjacent tube elements 11. It consists of a large number of corrugated fins 2.

The tube element 11 is obtained by integrally brazing two tube plates 12 similar to those of the first embodiment, facing each other and brazing them together.

The difference from the laminated heat exchanger of the first embodiment is that the reinforcing member 5 is not used, and the tube plate 1 is substantially rectangular and has a long tube plate 1 having a pair of holes 161 in the upper part communicating with the main reciprocating pipe section 121.
This is to use an irregularly shaped tube element 15 having a structure in which a central reinforcing plate 16 having the same length as 2 is joined between a longer tube plate 12 and a shorter tube plate 12.

The assembly procedure of this embodiment is to first attach the third plate to the side plate 31.
The corrugated fin 23 is placed, and the end plate A, the first tube element 111, and the first corrugated fin 21 are alternately stacked on top of it. At this time, a refrigerant inlet cup 41 is provided on one side of the pair of main reciprocating paths 10 formed by the pair of cylindrical main reciprocating pipe sections 121, and an outflow cup 42 is provided on the other side. Then, the irregularly shaped tube element 15 is placed on the first corrugated fin 21 at the end so that the second tube plate 12 is in contact with it. Then, a second corrugated fin 22 is placed on the irregularly shaped tube element 15.
and second tube elements 112 are alternately stacked. Then, the end plate B and the fourth corrugated fin 24 are placed on the second tube element 112 at the end, and finally the second side plate 32 is placed and brazed together. At this time, the aforementioned reinforcing ribs 123 are joined to the lower ends of adjacent tube elements 11 having the same length to maintain strength. Roughly speaking, the long tube plate 12 of the irregularly shaped tube element 15 uniformly carries the load received from the short tube plate 12 through the central reinforcing plate 16, so that the tube element 11 and the corrugated fins are 21 will not be deformed.

[Effect] According to the present invention, even if the vertical length of some of the corrugated fins of this stacked heat exchanger is shortened and a step is provided at the lower end, the corrugated fins will not be deformed during stacking. Therefore, when mounted on a vehicle or the like, the legroom can be improved and the device does not interfere with other equipment. Incidentally, the above-mentioned steps may be provided at several locations or may be provided in the form of steps.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the laminated heat exchanger of the first embodiment. FIG. 2(a) is a side view of the reinforcing member, and FIG. 2(b) is a side view of the reinforcing member.
) is its front view. FIG. 2(C) and FIG. 2(d) are side views showing other examples of reinforcing members, respectively. FIG. 3 is a partial front view showing the laminated heat exchanger of the second embodiment, and FIG. 4 is a side view showing the tube plate. Fifth
The figure is a partial front view showing the laminated heat exchanger of the third embodiment, and FIG. 6 is a front view showing the central reinforcing plate. FIG. 7 is a front view showing the tube plate, FIG. 8(a) is a sectional view showing the tube plate, and FIG. 8(b) is a view taken in the direction of arrow A. FIG. 9 is a front view showing a conventional laminated heat exchanger. 1... Pipe body part 11.111.112... Tube element 12.
...Tube plate 121...Main reciprocating pipe section 122...Refrigerant passage 123...Reinforcement rib 124
...Outer peripheral edge 125...Partition rib 126...
- Rib 13... Deformed tube plate 131... Horizontal reinforcement part 132... Vertical reinforcement part 14.
15... Irregular tube element 16... Center reinforcing plate 2.21.22.23.24... Corrugated fin 31.32... Side plate 5... Reinforcing member 51.52... End portion Figure 2 (a) Figure 2 (b) Figure 2 (C) Figure 2 (d) Figure 3 Figure 5 Figure 7 23 ZJ Ho Figure 9

Claims (3)

[Claims] (1) A pair of tube plates are joined facing each other, and a cylindrical main reciprocating conduit section passing through the tube plate in the thickness direction is formed in the upper part, and both ends communicate with the main reciprocating conduit section, respectively. A large number of tube elements each having a refrigerant passage extending downward are stacked, and a tube body section having a main reciprocating path connected to the main reciprocating path is provided at the upper part, and a tube element is interposed between each adjacent tube element. In the stacked heat exchanger, which is composed of a large number of corrugated fins, the tube elements and the corrugated fins are formed to have short vertical lengths and have a step on the lower side, in which adjacent tube elements and corrugated fins having different lengths in the vertical direction Of the tube elements and corrugated fins that match, each tube element is arranged parallel to the lower end of the shorter tube element and corrugated fin, and both ends are joined to both sides of the shorter corrugated fin. A laminated heat exchanger characterized in that a reinforcing member is bent downward along the side surface and integrally joined. (2) A pair of tube plates are joined facing each other, and a cylindrical main reciprocating conduit section that penetrates in the thickness direction of the tube plate is formed in the upper part, and both ends communicate with the main reciprocating conduit section inside. A large number of tube elements each forming a refrigerant passage extending downward are stacked, and a tube body section having a main reciprocating path connected to the main reciprocating path at the top is interposed between each adjacent tube element. In a stacked heat exchanger that is composed of a large number of corrugated fins, the tube elements and the corrugated fins are formed to have short vertical lengths and have a step on the lower side, in which adjacent tube elements and corrugated fins having different vertical lengths are provided. Of the corrugated fins, the tube plate that is joined to the opposite side of the longer corrugated fin has a portion forming the refrigerant passage with the other paired tube plate. A lateral reinforcing section is formed integrally with the lateral reinforcing section and is bent in the lateral direction and arranged parallel to the lower end of the short corrugated fin. 1. A laminated heat exchanger comprising a reinforcing section including a longitudinal reinforcing section integrally joined to a side surface of the tube element located between the adjacent corrugated fins having different lengths in different directions. (3) A pair of tube plates are joined facing each other, and a cylindrical main reciprocating conduit section is formed in the upper part to penetrate in the thickness direction of the tube plate, and both ends communicate with the main reciprocating conduit section inside. A large number of tube elements each forming a refrigerant passage extending downward are stacked, and a tube body section having a main reciprocating path connected to the main reciprocating path at the top is interposed between each adjacent tube element. In a stacked heat exchanger that is composed of a large number of corrugated fins, the tube elements and the corrugated fins are formed to have short vertical lengths and have a step on the lower side, in which adjacent tube elements and corrugated fins that have different vertical lengths The tube element between the corrugated fins is a pair of tube plates having different lengths in the vertical direction corresponding to the length of each adjacent corrugate fin, and a long tube plate interposed between the pair of tube plates. A laminated heat exchanger characterized by comprising a long central reinforcing plate corresponding to the above.