JPS62153690A - Counterflow type heat exchanger - Google Patents

Abstract

PURPOSE:To positively carry out sealing between two fluids and to secure a sufficient flow passage length with a compact constitution by alternately arranging heat insulating plates and heat transfer plates on one surface of each partition plate to constitute parallel flow passages, constituting inclined parallel passages on another surface thereof by inclining the heat insulating plates and heat transfer plates at the same pitch, and forming communication holes at both end portions of the flow passage on the partition plate. CONSTITUTION:A high-temperature fluid flows in through a supply pipe 28 and a low-temperature fluid through a supply pipe 25. The high-temperature fluid which has flowed into the supply pipe 29 passes through a lowermost stage first passage 16a, flows into a second passage 21a through a communication hole 23, flows into a first passage 16c through a communication hole 22, and flows out through an exhaust pipe 26, successively via a second passage 21c, first passage 16e, second passage 21e and first passage 16g. On the other hand, the low-temperature fluid which has flowed into the supply pipe 25 passes through an uppermost stage second passage 21f, and flows out of an exhaust pipe 27 successively via first passage 16f, second passage 21d, first passage 16d, second passage 21b, and first passage 16b. The high-temperature fluid and the low-temperature fluid flow in a counter flow system through heat transfer plates 15 and 20 and are heat exchanged at a high efficiency.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a counterflow type heat exchanger, which is suitable for being incorporated into a refrigeration system, etc. Regarding 4.

[Technical weight of the invention and its problems] Conventionally, a stacked heat exchanger has been known as a small-sized heat exchanger that is incorporated into a refrigeration device or the like. This laminated τ! Heat exchange: S is
In a laminate in which a plurality of heat transfer plates are laminated with a heat insulating plate interposed between them, two fluid passages are formed so as to be partitioned by the heat transfer plate E and the heat insulating plate, and the fluid passages of the two systems are formed. Since heat is exchanged between the flow paths via the heat exchanger plate, the heat exchange efficiency is 2.5% compared to other heat exchangers. 1) It has the following characteristics when it is layered.

By the way, the main part of such a laminated heat exchanger is the sixth
As shown in the figure, a heat exchanger plate 1 is formed into a disk shape using a thin aluminum plate with good thermal conductivity, and a heat insulating plate 1 is formed with a thin plate of approximately navy blue reinforced plus deck to have the same diameter as the heat exchanger plate 1. It has a laminate structure in which the plates 2 and 2 are laminated and bonded together in an alternating manner as shown in FIG. 7 with an adhesive sheet 3 interposed between them. Slit-like holes 4 for passing the first fluid are formed radially in each of the heat insulating plates 2, and holes 5 for passing the second fluid are formed between these holes. has been done. Further, a plurality of holes 6 are formed at positions corresponding to the holes 4 of the heat exchanger plate 1, and a plurality of holes 7 are also formed at positions roughly corresponding to the holes 5. Further, the adhesive sheets 1 to 3 are formed in the same shape as the heat insulating plate 2. and,
The drawing board 1 is arranged so that the holes 4 of the heat insulating plate 2 and the holes 6 of the heat transfer plate 1 are in communication with each other, and the holes 5 of the heat insulating plate 2 and the holes 7 of the heat transfer plate 1 are in communication with each other.
．． 2 are bonded together with an adhesive sheet 3, and the heat transfer plates 1 and heat insulating plates 2 are bonded one after another so that they are alternately positioned to form a laminate 8 as shown in FIG. . Therefore, in the laminated body 8, a first fluid passageway in which the holes 4 and the holes 6 are alternately connected, and a second fluid passageway 10 in which the holes 15 and the holes 7 are alternately connected are parallel to the lamination direction. By passing high-temperature fluid and flowing low-temperature fluid through these first fluid passages 9, which are indicated by solid line arrows in the figure, the transmission between both fluids is reduced. Heat is exchanged via the hot plate 1.

By the way, in order to improve the reliability J3 and exchange efficiency of the laminated heat exchanger configured as described above, it is necessary to improve the sealing performance of the laminated body 8 that forms the main part. is essential. If the sealing performance is poor, two different types of fluids will come together and the device will no longer function as a heat exchanger. However, in this type of heat exchanger 19S, it is difficult to improve the sealing performance at the adhesive sheet 3, especially when exchanging heat with a high-pressure fluid such as in a helium refrigeration system. However, since the differential pressure between the two fluids is large and the viscosity of helium gas is small, there is a drawback that even if there is a minute leak, the high-pressure and low-pressure fluids will mix.

In addition, in order to increase the temperature difference in the direction of the flow path, the length of the flow path must be increased, but since the flow path is straight in the above-mentioned stacked heat exchanger, it is necessary to increase the length of the flow path. However, the device itself had the disadvantage of becoming long. moreover,
The manufacturing process is complicated, and there are also problems in that the adhesive sheet blocks the flow path during welding, making it impossible to secure a sufficient flow path and resulting in a lack of reliability.

(Objective of the Invention) Therefore, the object of the present invention is to provide a highly reliable and compact counterflow type heat exchanger that maintains a large temperature difference in the direction of the flow path and improves the sealing characteristics between two fluids to be heat exchanged. It is about providing.

(Summary of the Invention) In order to achieve this object, the present invention provides a partition plate that stands vertically in the outer box, and a surface on one side of the partition plate and an inner wall of the outer box that faces the partition plate. A plurality of heat insulating plates and heat transfer plates are installed in the horizontal direction at a predetermined pitch between the partition plates to form a plurality of parallel flow paths, while the other side of the partition plate A plurality of heat insulating plates and heat transfer plates are arranged alternately at the same pitch as the above pitch between this and the inner wall of the outer box facing the outer box, and are parallel to each other by tilting at a predetermined angle with respect to the horizontal plane. Each of the heat insulating plates and heat transfer plates on the side facing the other side is connected between one end and the opposite end of each of the insulating plates and heat transfer plates on one side of the partition plate. They are arranged so as to diagonally communicate with each other, and the partition plate located at the end of each flow path is characterized by having a communication hole that connects both sides of the partition L and IJ temporary.

(Embodiment of the Invention) An embodiment of the counterflow type heat exchanger according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, the rectangular partition plate 11 is
For example, it is made of a low thermal conductivity material such as a synthetic resin plate such as Bakelite, and its surface 11a has a uniform pitch of P
Parallel to the upper and lower edges and aligned with the horizontal line, 12 marks for the heat insulating plate and 13 marks for the heat exchanger plate are alternately carved. 12 for these heat insulation plates and 13 for the heat exchanger plates.
A 119i heat plate 14 made of a material with low thermal conductivity and a first heat transfer plate 15 made of a material with high thermal conductivity such as aluminum or copper are fitted and bonded to each other. In this way, the first heat insulating plate 14 and the first
A first passage 16 is formed between the heat exchanger plate 15 and the first passage 16, which extends 1y in the horizontal direction.

On the other hand, on the back surface 11b of the partition plate 11, as clearly indicated by the broken line in FIG. are engraved alternately.

Each of these grooves 17 and grooves 18 is formed in a groove 12 of the surface 11a so that the difference in height between both ends of irI is twice the pitch P.
．． The angle of inclination is given to 13.

flit To be precise, for example, the insulation groove 1 on the back surface 11b side
7 is inclined so that one end of the insulation groove 17 coincides with the same end of the insulation groove 12 on the surface 11a of the partition plate, and the other end of the insulation groove 17 is inclined so that the height of the other end of the insulation groove 17 coincides with the other end of the insulation groove 12 located below by two pitches. are doing.

One second heat-transfer plate made of the same material as the heat-insulating plate 14 on the front surface is fitted and adhered to each of these heat-insulating grooves 17, and a second heat-transfer plate made of the same material as the heat-transfer plate 15 on the front surface is fitted and adhered. Board 2o
are fitted and glued. In this way, the second heat insulating plate 19 and the second
A second flow path 21 is formed between the heat exchanger plate 20 and the heat exchanger plate 20 .

Communication holes 22 and 23 are perforated in the partition plates 11 at both ends of each of the first passages 16, so that the first passages 16 and the second passages 21 opposite to the first passages 16 communicate with each other.

In this way, the first. The partition plate 11 on which the second heat insulating plates 14.19 and the 1° second heat transfer plates 15.20 are protruded is housed in the outer box 24, as shown in FIG. The outer box 24 is provided with a pair of supply pipes 25 and a discharge pipe 26 on its upper surface, and a -λ1 discharge pipe 27 and a supply pipe 28 on its lower surface. On the inner wall of the outer box 24, as shown in FIG. Grooves 30 are cut into which the respective protruding ends of the heat exchanger plate 20 are fitted and bonded. In this way, the first passage 16 is surrounded by the surface of the partition plate 11, the inner wall of the outer box 24, the adjacent first heat insulating plate 14, and the heat transfer plate 15, and is surrounded by the other passages except for the communication holes 22 and 23. It is isolated from 16.21. Similarly, the second passage 2
1 is surrounded by the back surface of the partition plate 11, the inner wall of the outer box 24, the adjacent second heat insulating plate 19, and the heat transfer plate 20, and is separated from other passages 16.21 except for the communication holes 22.23. Isolated.

Next, the passages 16.21 and the communication holes 22 on both sides of the partition plate 11 are
, 23 will be explained.

FIG. 5 shows the front and back surfaces of the partition plate side by side, where the first passage 16a at the lowest level connected to the supply pipe 28 communicates with the second passage 21a at the lowest level through the communication hole 23, and the second passage 21a at the lowest level is connected to the supply pipe 28. The second passage 21a at the lowermost stage communicates with the second passage 16G at the third stage through the communication hole 22, and the first passage 16c communicates with the second passage 21c at the third stage through the communication hole 23. , and thereafter similarly, this second passage 21G is sequentially connected to the first passage 16e and the second passage 16e.
The passage 21e communicates with the first passage 169, and this first passage 1
6q is connected to IJI-Yamakai 2G.

Further, the discharge pipe 27 is connected to the first stage of the second stage through the communication hole 22.
This second passage 16b communicates with the communication hole 23
j! to the second passage 21b of the second stage via the j! ! This second passage 21b is sequentially connected to the first passage 16b and the second passage 21d.
, 1st]k'816f', i2 passage 21f, supply pipe 2
It is connected to 5.

In this way, the second passage 21 has a structure at both ends. Since it is inclined relative to the first passage 16 so that the difference is 2 bits 2P, the two parallel passages are separated by Iυ between the heat insulation plates 14 and 19 and the heat exchanger plates 15 and 20, respectively. It is formed inside the outer box 24.

Next, the effects of the above-mentioned dosage of the present invention will be explained.

A high-temperature fluid is introduced from the supply pipe 28 in FIG. 3, and a low-temperature fluid is introduced from the supply pipe 25, respectively. It flows into the supply pipe 28! The high-temperature fluid passes through the first passage 16a at the lowest stage, flows from the communication hole 23 into the second passage 21a as indicated by the solid line arrow in FIG. Flows into the second passage 21c and the first passage 16e in order.
, the discharge pipe 26 passes through the second passage 21e and the first passage 16g.
It leaks from the stream. On the other hand, the low-temperature fluid that has flowed into the supply pipe 25 flows into the second
Passing through the passage 21F, the first passage 16f and the second passage 21d.

It passes through the first passage 16d, the second passage 21b, and the first passage 16b in order and flows out from the initial discharge pipe 27.

In this manner, the high-temperature fluid and the low-temperature fluid flow through the heat exchanger plates 15 and 20 in a countercurrent manner, thereby exchanging heat with high efficiency.

In the above embodiment, only one partition plate was used, but a plurality of partition plates may be used to connect the channels in series.

[Effects of the Invention] As is clear from the above description, according to the present invention, a horizontal parallel flow path is constructed by alternately arranging heat insulating plates and heat transfer plates on one side of a partition plate. On the other hand, a heat insulating plate and a heat transfer plate are installed on the other side of the partition plate at the same pitch to form an inclined parallel flow path, and communication holes are bored at both ends of the flow path on the partition plate. Since the counterflow flow path is formed, it is possible to reliably seal between the two fluids, and since the flow path is formed on both sides of the partition plate, a sufficient flow path length can be secured with a compact configuration. In addition, since the partition plate is made of a material with low thermal conductivity, it is possible to reduce heat conduction in the direction of the flow path, and it is possible to create a large temperature difference in the direction of the flow path.Furthermore, the structural members have a relatively simple shape. Therefore, manufacturing costs can be significantly reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the main parts of an embodiment of a counterflow heat exchanger according to the present invention, Fig. 2 is a front view showing the partition plate of Fig. 1, and Fig. 3 is according to the above embodiment. FIG. 4 is a perspective view showing the external appearance of the heat exchanger, FIG. 4 is a cross-sectional view showing a part of the heat exchanger according to the above embodiment, and FIG. 5 is a front view showing the state of counterflow flowing on both sides of the partition plate. 6 is an exploded perspective view showing the main parts of a conventional laminated heat and humidity exchanger, and FIG. 7 is a perspective view showing the external appearance of the heat exchanger shown in FIG. 6. 11... Partition plate, 14... First insulation board, 15...
1st heat exchanger plate, 16... 1st passage, 19... 2nd heat exchanger plate, 20... 2nd heat exchanger plate, 21... 2nd passage, 22
．． 23...Communication hole, 24...Outer box, P...Bidge. Applicant's agent Sato - Yudo j tail 2 figure tail 4 [121 (,t() (F3) tail 5!1
2] Map 7th leap

Claims (1)

[Claims] 1. A partition plate is provided in the outer box in a substantially vertical direction, and a plurality of heat insulating sheets are provided between one side of the partition plate and the inner wall of the outer box facing the partition plate. A plurality of parallel flow channels are constructed by horizontally installing plates and heat transfer plates at predetermined pitches alternately, while the other side of the partition plate and the inner wall of the outer box opposite thereto. A plurality of heat insulating plates and heat transfer plates are installed alternately at intervals equal to the above-mentioned pitch and inclined at a predetermined angle with respect to the horizontal plane in parallel. Each of the upper insulation plates and heat exchanger plates is arranged so as to diagonally communicate between one end and the opposite end of each of the insulation plates and heat exchanger plates on one side of the partition plate, respectively. A counterflow type heat exchanger characterized in that a partition plate located at the end of a flow path has a communication hole that connects both sides of the partition plate. 2. The heat exchanger plate and the heat insulating plate are each fitted into grooves formed in parallel to the front and back surfaces of the partition plate, as set forth in claim 1. Counterflow heat exchanger.