WO1992006343A1

WO1992006343A1 - Laminated heat exchanger

Info

Publication number: WO1992006343A1
Application number: PCT/JP1991/001292
Authority: WO
Inventors: Tsuyoshi Matsunaga; Kenji Fujino; Takashi Sugahara; Hiroaki Suga
Original assignee: Matsushita Refrigeration Company
Priority date: 1990-09-28
Filing date: 1991-09-27
Publication date: 1992-04-16
Also published as: EP0503080B1; EP0730133A3; EP0730133A2; EP0730134A2; EP0730134B1; EP0503080A4; EP0730132A2; DE69132499D1; DE69125819D1; EP0730132A3; EP0730134A3; EP0503080A1; DE69125819T2; DE69132499T2

Abstract

In a laminated heat exchanger wherein partitions are provided in a plate (32) on a primary side and a plate (33) on a secondary side to form channels therein, and a plurality of the plates (32) on the primary side and the plates (33) on the secondary side are laminated one upon another with respective seal plates (3) therebetween, each of the partitions (35) of the plates (33) on the secondary side are located at positions opposed to each of the channels (11) of the plates (32) on the primary side and each of the partitions (34) of the plates (32) of the primary side are located at positions opposed to each of the channels (17) of the plates (33) on the secondary side, thereby preventing the seal plates (3) from being deformed even if pressure of the coolant flowing through the channels becomes nonuniform. Furthermore, sides of the plates (32) on the primary side, the plates (33) on the secondary side and the seal plates (3) are formed into shapes different from one another, thereby making it easy to identify falling-off of a plate.

Description

Specification

Title of invention

Stacked heat exchanger

Technical field

The present invention relates to a laminated heat exchanger for exchanging heat between a primary refrigerant and a secondary refrigerant, and is used for a cooling machine of a cooling oil for an air conditioner or a machine tool. .

Background art

In air-conditioning systems, CFCs (close-up fluorocarbons), water and oil are used as refrigerants, and these refrigerants are used as primary and secondary refrigerants. The demand for laminated heat exchangers that exchange heat using CFCs and CFCs, CFCs and water, water and water, and foils and water as refrigerants has been increasing.

A conventional example (Japanese Patent Application Laid-Open No. 61-243297) will be described below with reference to FIGS. 1 to 5.

As shown in the figure, the conventional laminated heat exchanger 1 is configured by combining a primary plate 2, a seal plate 3, and a secondary plate 4 with each other. End plates 5a and 5b are attached to the ends, and inlet and outlet pipes 6 and 7 for primary refrigerant and outlet pipes 8 and 9 for secondary refrigerant are mounted on this end plate 5b. .

The primary plate 2 has a rectangular shape, and is provided with a pair of round holes 10 for circulation of the primary refrigerant at the end side of the plate, offset from the center. A plurality of grooves 11 meandering in parallel from one vicinity of the round hole 10 of the primary plate 2 to the other is formed by the partition 12. At the end of the primary plate 2 different from the round hole 10, holes 13 for secondary refrigerant circulation are formed diagonally. The hole 13 has a rectangular portion 14 and a semicircular portion 15 in the middle of the long side of the rectangular portion 14.

The secondary plate 4 has a rectangular shape, and a plurality of grooves 16 through which the secondary refrigerant flows are formed by partitions 17. The groove 16 is provided in a meandering manner in the vicinity of a round hole 18 facing the hole 13 of the primary plate 2. The round hole 18 has a semi-circular portion 15 of the primary plate 2 and a part of the locus. In addition, a hole 19 is provided at a position facing the round hole 10 of the primary blade 2. The hole 19 is formed by a substantially rectangular portion 20 and a semicircular portion 21 formed in the middle of the long side of the rectangular portion 20. And the round hole 10 of the primary plate 2 have the same trajectory in part.

In addition, the seal plate 3 has holes 13 and 22 of the same shape as the holes 13 of the primary plate 2 and the holes 19 of the secondary plate 4. It is formed. The lengths of the rectangular portions 6, 13 of the holes 13, 19 are formed so as to extend over the respective grooves 11, 16.

Then, the primary plate 2, the seal plate 3, the secondary plate 4, the seal plate 13, the primary plate 2, and the primary plate 2, It is repeatedly sandwiched with the roll plate 3, and at one end is an end plate 5a for a seal, and at the other end, the inlet and outlet pipes 6, 7, and the secondary refrigerant for the primary refrigerant. O End plate 5b equipped with entrance pipes 8 and 9

That is, the primary refrigerant flows in from inlet pipe 6 and has the length of hole 22. It is diffused in the rectangular part, flows into the groove 11 of the primary plate 2, and flows out of the outlet pipe 7 through the hole 22 on the opposite side.

In addition, the secondary refrigerant flows from the inlet pipe 8, is diffused in the rectangular portion of the hole 19, flows into the groove 16 of the secondary plate 4, and flows into the opposite hole 1. From 9 flow to exit pipe 8.

At this time, the primary refrigerant and the secondary refrigerant exchange heat via the seal plate 3. Therefore, the seal plate 3 is formed of a material having good heat conductivity.

However, in the above configuration, the grooves 11 and 16 of the primary plate 2 and the secondary plate 4 have the same length, and the holes 10 and 1 have the same length. 8 is located on the same line, the distance between the center of holes 10 and 18 and the ends of both ends of grooves 11 and 16 is long. It was difficult for the water to flow because the distance was too long to flow. Also, in the part where the grooves 11 and 16 of the primary plate 2 and the secondary plate 4 are located on the same straight line, there is only the seal plate 3, so the groove 1 When there is a pressure difference between the fluids flowing through 1 and 16, the seal plate 3 is deformed and obstructs the flow of the refrigerant, so the thickness H of the seal plate 3 is reduced. It has to be thick. Therefore, there was a problem that the volume became large and cost was increased.

In addition, when the plates are alternately stacked, if the seal plate 3 comes off in the wrong order, leakage of the primary refrigerant and the secondary refrigerant occurs, and There was a problem that the rate was displaced, making assembly difficult, reducing productivity, and resulting in quality instability.

Further, when attaching the entrance / exit pipes 6, 7, 8, 9 to the end plate 5b, the end plate 5b is counterbored and the entrance / exit pipe is mounted. 6, 7, 8, and 9 had to be positioned.

The present invention provides a laminated heat exchange system in which the distance between the end of the groove of the primary plate and the groove of the secondary plate and the hole is made as short as possible to reduce the flow path resistance. The purpose is to provide equipment.

In addition, a stacked heat exchanger is provided in which the grooves between the primary plate and the secondary plate are less likely to overlap each other via the seal plate. The purpose is to provide.

Also, the present invention provides a stacked heat exchanger in which the order in which the primary plate, the secondary plate, and the seal plate are superimposed is not mistaken. The porpose is to do.

It is another object of the present invention to provide a laminated heat exchanger in which the position of an inlet / outlet pipe with respect to an end plate is simplified.

Disclosure of the invention

In other words, the present invention is to vary the length of the primary plate and the secondary plate so that the distance between the end of the groove and the hole is V-shaped. . In addition, on the partition that forms the multiple grooves of the primary plate, the grooves of the secondary plate are arranged, and the grooves of the secondary plate are formed. The groove of the primary blade is arranged on the partition. This prevents the deformation of the seal plate interposed between the primary plate and the secondary plate.

In addition, projections lower than the plate thickness are provided on two different sides of the primary side plate and the secondary side plate, and the projections are fitted to the seal plate. A notch is provided for matching. You will never forget to insert the seal plate.

The corners of the primary plate, the secondary plate, and the seal plate By making the shape of each plate different for each plate, it is possible to confirm that the plate is properly ridged from the outside. In addition, the diameter of the hole in the primary plate or the secondary plate is made smaller than the diameter of the hole where the inlet / outlet pipe of the end plate is inserted, and the entrance / exit It regulates the purchase cost of pipes.

Also, insert the entrance / exit pipe to the opposite end plate and locate it in the round holes of the primary plate, secondary plate and seal plate of the parenthesis. A hole is provided in the area where the entrance and exit pipes are allowed to enter.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a conventional laminated heat exchanger, FIG. 2 is a plan view of a primary plate of FIG. 1, and FIG. 3 is a plan view of a seal plate of FIG. Figure, FIG. 4 is a plan view of the secondary plate of FIG. 1, FIG. 5 is a cross-sectional view of FIG. 1 taken along the line V-V, and FIG. 6 shows an embodiment of the present invention. Sectional view of FIG. 5 of the stacked heat exchanger, FIG. 7 is a plan view of the primary side plate of FIG. 6, FIG. 8 is a plan view of the seal plate of FIG. 6 FIG. 9 is a plan view of a secondary plate of FIG. 6, FIG. 10 is an exploded perspective view of a laminated heat exchanger showing another embodiment of the present invention, FIG. 10 is a side view of FIG. 10; FIG. 12 is a plan view of the primary plate of FIG. 10; FIG. 13 is a secondary plate of FIG. 10 14 is a plan view of the seal plate of FIG. 10, FIG. 15 is a side view of FIG. 12, and FIG. 16 is a side view of FIG. 13, FIG. 17 is a side view of FIG. 14, FIG. 18 FIG. 19 is a sectional view of a principal part of a laminated heat exchanger showing another embodiment of the present invention, FIG. 19 is a plan view of a side plate of FIG. 18 and FIG. 20 is FIG. FIG. 21 is a plan view of a secondary plate of FIG. 18 and FIG. 22 is a laminated view showing another embodiment of the present invention. FIG. 2 is a cross-sectional view of a heat exchanger. Best mode for carrying out the invention

In order to explain the present invention in more detail, the following description is made with reference to the accompanying drawings FIG. 6 to FIG. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in the figure, the laminated heat exchanger 31 of the present invention comprises a primary plate 32, a seal plate 3, a secondary plate 33, a seal plate. A plurality of plates 3 are alternately laminated, and the end plate 5b having the inlet / outlet pipes 6 and 8 at both ends and the end plate 5a are adhered so that the internal fluid does not leak. The structure is

The primary refrigerant flowing from the inlet pipe 6 flows into the plurality of grooves 11 of the primary plate 32 partitioned by the partition 34, and flows out to the outlet pipe 7. On the other hand, the secondary refrigerant that has flowed in from the inlet pipe (not shown) flows into the groove 17 of the secondary plate 33 divided by the partition 35, and flows out of the outlet pipe (not shown). Spill). At this time, heat is exchanged between the upper and lower different fluids via the seal plate 3.

In the present embodiment, the groove 17 of the secondary plate 33 is provided on the partition 34 of the primary plate 32, and the groove 17 of the secondary plate 33 is provided on the partition 35 of the secondary plate 33. Since the groove 11 of the primary plate 3 3 is provided, there is a seal plate 3 between the groove 11 and the groove 17 on the same line. Sheets and There is a secondary plate 3 3 partition 3 4 or a primary plate 3 2 partition 3 5, and the plate thickness becomes thicker. Even if the pressure of the refrigerant is different, the seal plate is less likely to be deformed, so that the flow rate of the refrigerant can be secured.

Further, as another embodiment, a description will be given with reference to FIG. 17 rather than FIG. In the figure, 41 is an end plate having a refrigerant inlet / outlet section 42, 41a is an end plate for sealing the refrigerant, 43 is a primary side plate formed by dividing a groove 43a into a partition 43b, Reference numeral 44 denotes a secondary plate formed by dividing a groove 44a into a partition 44b, and reference numeral 45 denotes a seal plate. A plurality of projections 46 having a thickness smaller than h are provided on two different sides of the primary plate 4 3 and the secondary plate 44, and the seal plate is provided. A notch 47 is provided on the rate 45 to be fitted with the convex portion 46. As a result, the primary plate 4 3 and the secondary plate 4 4 are fitted with the seal plate 45 at the time of assembly, and the seal plate 45 at the time of manufacture. If you forget to insert the primary plate 4 3 and the secondary plate 4 4, the primary plate 4 4 There is a gap between 3 and the secondary plate 4 4, and errors can be easily found visually.

In addition, by providing the rim-shaped holes 48 on each of the plates 43, 44, and 45, when a plurality of plates are stacked, the rim-shaped holes 4 are formed. As a result, the parts 8 are overlapped with each other, so that the assembling becomes easy, and the positioning can be performed without causing any displacement in each plate.

Another embodiment will be described with reference to FIGS. 18 to 21. FIG. The same components as those in the related art are denoted by the same reference numerals and will be described in detail. The laminated heat exchanger 51 according to the present invention comprises a primary plate 2, a seal plate 3, and a secondary plate 4 which are alternately laminated in plural numbers, and both ends thereof are provided. The end plate 5b, which has an inlet pipe 6 and an outlet pipe (not shown), is connected to the end plate (not shown) so that the fluid inside does not leak. The structure is closely attached.

The primary refrigerant flowing from the inlet pipe 6 flows through the round hole 10 and the holes 22 and 19, flows into the multiple grooves 11 of the primary plate 2, and then flows into the opposite round hole. 10. Flow out of holes 22 and 19 to outlet pipe (not shown). On the other hand, the secondary refrigerant flowing from the inlet pipe (not shown) flows through the holes 13, 23, and the round hole 18, flows into the groove 16 of the secondary plate 4, and then flows into the opposite side. The holes 13 and 23 and the round hole 18 flow out to an outlet pipe (not shown). At this time, heat is exchanged between the upper and lower different fluids via the seal plate 3.

In this embodiment, the plate following the end plate 5b, that is, the diameter D of the round hole 10 of the primary plate 2 and the secondary plate 4 is defined as the entrance / exit plate. The outer diameter E of each of the lobes 6 and 7 is smaller than the outer diameter E. The inlet pipe 6 and the outlet pipe (not shown) should be smaller than the semicircular part of the mouth pipes 8 and 9 so that the inlet pipe 6 and the outlet pipe (not shown) contact the primary plate 2. The end plate 8 can be positioned without being counterbored.

Also, the angle of the primary plate 2 is reduced to an arc 52, and the angle of the secondary plate 4 is reduced to an inclined surface 53. Even after the plate is assembled, the type of plate can be determined at a glance, and a mistake in assembling the plate can be easily found. Further, another embodiment will be described with reference to FIG. The same components as those of the conventional and other embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

6 1 is the inlet pipe of the primary refrigerant, end plate 5 b, round hole 10 of primary plate 2, hole 22 of seal plate 3, secondary plate It extends through hole 19 of 4 to end plate 5a. In addition, a long hole 62 is formed in a portion of the inlet pipe 61 located at each of the holes 10, 22, and 19. In addition, the outlet pipe of the other primary refrigerant and the outlet pipe of the secondary refrigerant also extend to the end plate 5a.

Owing to this, it is only necessary to insert the inlet / outlet pipe until it enters the hole and hits the end plate, which simplifies the positioning of the insertion allowance.o

In this embodiment, a plurality of grooves 36 meandering in parallel from the vicinity of one side of the round hole 10 to the vicinity of the other side of the round hole 10 are formed by the partition 34 on the primary side plate 32. Then, the length of the groove 36 is made longer as the distance from the center of the hole 10 is increased, and the end of the groove 36 is positioned closer to the center of the hole 10. It is arranged so that it becomes V-shaped as it moves away from it. In addition, the secondary plate 33 has a plurality of grooves 37 extending from one vicinity of the round hole 18 to the vicinity of the other of the round hole 18 by a partition 35. Then, the length of the groove 37 is made longer as the distance from the center of the hole 18 is increased, and the center of the hole 18 is so arranged that its end is closer to the center of the hole 18. It is arranged so that it becomes V-shaped the further away from it. Therefore, the distance between the holes 10 and 18 and the ends of the grooves 36 and 37 is shortened, so that the refrigerant easily flows and the branch flow is improved.

In addition, the secondary plate 3 3 is placed on the partition 3 4 of the primary plate 3 2 The groove 37 on the secondary plate 33 has a groove 36 on the same line as the groove 36 on the primary plate 33 on the partition 35 on the secondary plate 33. Or between slot 3 7 and two shield plates 3 and partition of secondary plate 3 3 3 4 or partition of primary plate 3 2 Since the thickness of the plate is increased, the seal plate is not easily deformed even if the pressures of the primary refrigerant and the secondary refrigerant are different, so that the flow rate of the refrigerant Can be secured.

Industrial applicability

As described above, the laminated heat exchanger according to the present invention is suitable for performing heat exchange between the primary refrigerant and the secondary refrigerant of an air conditioner. It is also suitable for performing heat exchange by circulating oil such as machine tools with its cooling water.

Claims

The scope of the claims

A rectangular plate is used to form a plurality of long grooves through which the refrigerant flows, and a hole is formed at the end of the groove, and a hole formed on the diagonal of the side of the plate that is different from the hole. The primary plate is made of a rectangular plate and a plurality of long grooves through which the refrigerant flows are formed by partitions, and the primary plate is independently formed at the end of the groove. In addition to forming a hole that communicates with the hole of the plate, the secondary plate consists of a hole facing the hole of the primary plate on the side of the flat plate different from the hole. And a seal plate interposed between the primary plate and the secondary plate, and the primary plate and the seal plate interposed between the primary plate and the secondary plate. The hole in the secondary plate and the end of the long groove are arranged in a V-shape, and the length of the long groove is increased as the distance from the hole is increased.

A plurality of long grooves through which the refrigerant flows are formed by partitions using a rectangular flat plate, holes are formed at the ends of these grooves, and holes formed diagonally to the sides of the flat plate different from the holes. A primary plate made of the above and a plurality of long grooves through which the refrigerant flows with a rectangular flat plate are formed by partitions, and the primary plate is formed independently of the ends of the grooves. And a hole communicating with the hole of the plate, and on the side of the flat plate different from the hole

A secondary plate consisting of a hole facing the hole of the primary plate, interposed between the primary plate and the secondary plate. And a secondary plate facing the groove of the primary plate that sandwiches the seal plate, and a partition of the secondary plate.

A stacked heat exchanger in which the primary plate partition is placed opposite the groove on the secondary plate. •

3. A plurality of long grooves through which the refrigerant flows are formed by partitions using a rectangular flat plate, holes are formed at the ends of the grooves, and formed on the diagonal of the sides of the flat plate different from the holes. A primary side brace consisting of holes and a plurality of long grooves through which the refrigerant flows with a rectangular flat plate are formed into partitions, and the primary side brace is formed independently of the end of this groove. A hole communicating with the hole of the side plate is formed, and a hole facing the hole of the primary plate is formed on the side of the flat plate different from the hole. A primary plate and a seal plate interposed between the primary plate and the secondary plate. The primary plate and the secondary 0 plate Laminated heat exchangers with different shapes around the plate and seal plate.

4. Each of the primary plate and the secondary plate has a different projection on each of the different sides, and the seal plate has a notch with each projection. The laminated heat exchanger according to claim 2, which is provided.

5. The corners of the primary plate are arcuate, and the corners of the secondary plate are sloped, and the corners of the seal plate are connected to the primary plate. 3. The stacked heat exchanger according to claim 2, wherein the shape of the corners of the secondary plate and the secondary plate is different.

0 6. A plurality of long grooves through which the refrigerant flows with a rectangular flat plate are formed by partitions, holes are provided at the ends of these grooves, and formed on the diagonal lines of the sides of the flat plate different from the holes. A primary plate consisting of a hole and a plurality of long grooves through which a refrigerant flows by a rectangular flat plate are formed by partitions. The primary plate is formed independently of the ends of the grooves. A hole that communicates with the hole in the side plate at 5 times is formed, and on the side of the flat plate different from the hole. • A secondary plate consisting of a hole facing the hole of the primary plate and interposed between the primary plate and the secondary plate. A seal plate to be provided, end plates provided at both ends, and an inlet / outlet pipe of a primary refrigerant and a secondary refrigerant communicating with the hole mounted on one end plate. In other words, the stacked heat exchanger features a hole in the primary plate that is smaller than the diameter of the inlet / outlet pipe.

7. A plurality of long grooves through which the refrigerant flows in the rectangular flat plate are formed by partitions, holes are provided at the ends of the grooves, and holes are formed diagonally to the sides of the flat plate different from the holes. And a plurality of long grooves through which the refrigerant flows with a rectangular flat plate, and are formed independently of the ends of the grooves at the ends of the grooves. A hole that communicates with the hole in the plate is formed, and on the side of the flat plate different from the hole.

A secondary plate consisting of a hole facing the hole of the primary plate, and a sheet interposed between the primary plate and the secondary plate. A cooling plate, end plates provided at both ends, and an inlet / outlet pipe of a primary refrigerant and a secondary cooling medium communicating with the hole attached to one of the end plates. The entrance / exit pipe is brought into contact with the other end plate, and the primary plate, secondary plate, and seal plate of the entrance / exit tube are stacked. A stacked heat exchanger characterized by having long holes between them.