JP3473181B2 - Plate-fin type heat exchanger and method of manufacturing separator used therein - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate / fin heat exchanger, and more particularly to a bilaterally symmetrical plate / fin heat exchanger and a method for manufacturing a separator used therein.

[0002]

2. Description of the Related Art A conventional plate-fin heat exchanger is
Low temperature fluid inflow header (1a) as shown in Figures 10 and 11.
And a header for heating low temperature fluid (2a), oblique alternating current section (3d) and oblique alternating current section (3c) provided on the inflow side and the outflow side, high temperature fluid inlet (5) provided at the oblique alternating current section (3c) , Oblique exchange section (3
The high temperature fluid outlet (6) provided in d), the counter flow part provided between the oblique alternating current part (3c) and the oblique alternating current part (3d) and exchanging heat between the low temperature fluid (7) and the high temperature fluid (8). It is a rectangular type consisting of (4a).

The internal structure thereof is as shown in FIG. 12, which is a sectional view taken along the line AA of FIG. 11, FIG. 13 which is a sectional view taken along the line BB of FIG. 11, and FIG. 14 which is a perspective view of each member. First separator (9a) (2a in FIG. 14) provided with an edge (25a) and two holes (23a, 24a) for inserting two headers (1a, 2a)
Insert the heat transfer enhancer (14a) for the low temperature fluid flow path (12a), the two oblique flow path members (18a, 19a) (b in FIG. 14), and the following headers (1a, 2a) 2 The second separator (10a) with the embossed portions (22e, 22f) around the two holes (23a, 24a) (Fig. 14).
C), the heat transfer enhancer (15a) for the high temperature fluid flow path (13a), and the two oblique flow path members (20a, 21a) (d in FIG. 14) are repeated, and there are more than two stages. Then, it is stacked in 80 steps or more, and the first separator (9a), the heat transfer accelerator (14a) for the low temperature fluid flow path (12a), and the two oblique flow path members (18a, 19a) are stacked thereon. Overlap, stack the flat plate-shaped third separator (11a) (e in Fig. 14) with holes (23a, 24a) for inserting the following headers (1a, 2a) on top, and reinforce the spacers between each separator. (26)
Is inserted and fixed, the low temperature fluid introduction header (1a) and the low temperature fluid outflow header (2a) are attached, and the covers ( 16 , 17 ) are fixed on the upper and lower sides.

In the above-mentioned conventional plate-fin type heat exchanger, the low temperature fluid (7), which has entered the oblique flow path member (18a) of the low temperature fluid flow path (12a) from the inflow header (1a), flows in the counter flow part ( 4a)
At the inlet (5) of the oblique flow path member (20a) of the high temperature fluid flow path (13a)
It is heated by the high temperature fluid (8) that has flowed into the low temperature fluid flow path (12a) through the oblique alternating current portion (19a) and the outflow header (2
The high temperature fluid (8) that has flowed out of (a) and has completed heat exchange flows out of the outlet (6) of the oblique flow path member (21a) of the high temperature fluid flow path (13a).

[0005]

In the above-mentioned conventional rectangular plate / fin type heat exchanger, the shapes of the separator and the oblique flow path member are not symmetrical, and the header is outside the heat exchanger. For this reason, there is a risk of partial cooling, causing thermal stress and deformation. Further, since there is no fin around the header, the strength is weak and there is a problem that a reinforcing member is required. An object of the present invention is to provide a heat exchanger that does not generate thermal stress and does not require a reinforcing member.

[0006]

In order to achieve the above object, in the plate-fin heat exchanger of the present invention,
A symmetrical heat transfer enhancer for a low temperature fluid passage and a symmetrical heat transfer enhancer for a low-temperature fluid flow path on a symmetrical first separator having front and rear two holes for inserting the following two headers and having a raised edge around the periphery.
Place the mixed flow passage member Symmetrical provided one hole for inserting the following header in the interior of the pieces, on the first septum holes for inserting the following header provided with a rim which is one step lower around
A left-right symmetrical second separator provided at the same position as the separation plate and having a raised embossed part around the hole for inserting the header below, and a left-right symmetrical type for a high temperature fluid flow path. One heat transfer accelerator and one hole for inserting the header below are provided inside the two
The left and right symmetrical oblique flow path members, the raised edge around the periphery, and the hole for inserting the header below are the same as the first separator.
Provided such position, and a third separator symmetrical shape having a embossed portion that is one step lower around the holes for inserting the following header, the heat transfer enhancement of the right and left symmetrical cryogenic fluid passage and 2 Repeatedly stacking a left and right symmetrical flow channel member having one hole for inserting the following header inside each piece one or more times,
Place the first separator on it, turn it over, and insert the low temperature fluid inflow header and the low temperature fluid outflow header into the above two headers.
It is that it is attached to the hole to be inserted , and the covers are placed on the top and bottom and fixed.

Further, in the plate-fin type heat exchanger of the present invention, the fourth separator having the same shape as that of the embossed portion of the third separator is cut out in place of the first separator, and the lowermost part is used. A ring is provided between the second separator and the lower cover and between the uppermost third separator and the upper cover to prevent leakage of the cryogenic fluid around the cryogenic fluid introduction header and the cryogenic fluid outflow header. Is fixed. Further, in the plate-fin heat exchanger of the present invention, the third separator has the same shape as that of the second separator turned inside out.
Further, as a method of manufacturing the fourth separator of the plate-fin type heat exchanger of the present invention, the embossed portion of the third separator is removed and manufactured.

The heat transfer enhancer of the present invention has an offset fin as shown in FIGS. 4 (b) and 4 (d), a straight fin with a twisted plate in which a twisted plate is inserted in the straight fin, and a fin passage. Wave fins with a wave on the top and bottom. In the present invention, the term "symmetrical" means that the left side and the right side are symmetrical when the plate-fin heat exchanger of the present invention is placed as shown in FIG. In addition, in the present invention, "... two holes (23, 2
4) On the left and right symmetrical first separator (9)
“Front and back” of “...” is the plate / fin type of the present invention
Before and after the heat exchanger is placed as shown in Fig. 2
(On the other side).

[0009]

According to the present invention, the separator, the heat transfer enhancer, and the low-temperature and high-temperature oblique flow path members of the plate-fin heat exchanger are symmetrical in shape, and the header is mixed with a diagonal flow. Since it is provided inside the passage member, it is heated uniformly and can be prevented from being deformed due to the generation of thermal stress. Moreover, since the oblique flow passage member is also on the rear side of the header, The strength of the side becomes stronger and no reinforcing member is required. In addition, the separator, the heat transfer promoter, etc. are made symmetrical, and the low temperature fluid inflow header and the low temperature fluid outflow header are made to have the same shape and arranged symmetrically, so that the separator, heat transfer The accelerator, the oblique flow path member, etc. can be shared. Further, by designing the third separator to have the same shape as that of the second separator turned upside down, it is not necessary to design and manufacture the third separator. Furthermore, by making the fourth separator the same shape as the one obtained by removing the embossed portion of the third separator, it can be manufactured by removing the embossed portion of the third separator, which facilitates designing and manufacturing. Therefore, the number of manufacturing days is small, and the manufacturing cost is low.

[0010]

Referring to FIGS. 1 to 9 will be described embodiments of EXAMPLES Hereinafter the present invention. FIG. 1 shows a plate according to an embodiment of the present invention.
FIG. 2 is a perspective view for explaining a fin-type heat exchanger, FIG. 2 is a top view of a plate-fin-type heat exchanger according to an embodiment of the present invention,
3 is an enlarged sectional view taken along the line AA of FIG. 2, FIG. 4 is a perspective view of each member of the plate-fin type heat exchanger of FIG. 2, and FIG. 5 is a plate-fin type heat exchanger of another embodiment of the present invention. 6 is a perspective view of a fourth separator of the plate-fin heat exchanger of FIG. 5, FIG. 7 is an explanatory view showing a method of manufacturing the fourth separator of FIG. 6, and FIG. 5 is a perspective view of the ring of the plate-fin heat exchanger of FIG. 5, and FIG. 9 is an explanatory view of the oblique flow path member of the plate-fin heat exchanger of another embodiment of the present invention.

Embodiment 1 A heat exchanger according to an embodiment of the present invention comprises a symmetrical flow section (4), a low temperature fluid (7) and a high temperature fluid (for heat exchange as shown in FIGS. 1 to 3). 8) The symmetrical incline AC parts (3a, 3b) that flow in or out, the header (1) for introducing the low temperature fluid and the header (2) for the low temperature fluid which have the same shape, and are arranged symmetrically. The low temperature fluid (7) that has entered the oblique flow path member (18) of the low temperature fluid flow path (12) of the oblique alternating current section (3a) from the inflow header (1) is the counter flow section (4).
Is heated by the high temperature fluid (8) entering from the inlets (5a, 5b) of the oblique flow path member (20) of the high temperature fluid flow path (13) of the oblique AC section (3b) through the separator, Outflow header (2) through the oblique AC section (19) of the low temperature fluid flow path (12) of section (3b)
The high temperature fluid (8) that has flowed out of the heat exchange and has finished the heat exchange flows out from the outlets (6a, 6b) of the oblique flow path member (21) of the high temperature fluid flow path (13) of the oblique alternating current part (3a). It is what

The internal structure will be described with reference to FIGS. 3 and 4.
As shown in Figure 2, two holes (23, 24) are provided around which a raised edge (25) is provided and the following two headers (1, 2) are inserted.
Interior of the left and right symmetrical for cryogen flow path (12) on the first separator of Symmetrical provided around (9) (a in FIG. 4) the heat transfer accelerating members (14) and two Insert the following header (1, 2) into
Mixed flow passage member of a bore entering one provided left and right symmetrical (18,1
9) (b in Fig. 4) is fixed by sandwiching the brazing filler metal, and on top of that ,
The lower edge (25) is provided on the periphery and holes (23, 24) for inserting the following headers (1, 2) are formed in the first separator (9).
Provided at the same position as the above, and the circumference of the above two holes (23, 24)
Symmetrical heat transfer for the high temperature fluid flow path (13) on the symmetrical second separator (10) (Fig. 4c) with the raised embossed parts (22a, 22b) in the enclosure . Promoter (15) and two
A horizontal symmetrical flow path member (20, 21) (d in FIG. 4) having one hole for inserting the following header (1, 2) fixed inside with a brazing filler metal And a raised edge around it (25)
And holes (2) for inserting the following headers (1, 2)
3 and 24) are provided at the same position as the first separator (9), and
The third separator (11) having a symmetrical shape with the embossed portions (22c, 22d) lowered one step around the above two holes (23, 24 )
(E in FIG. 4), a symmetrical heat transfer enhancer (14) for the low temperature fluid flow path (12) and two headers (1,
2) Bilaterally symmetric diagonal flow path members (18, 19) (b in FIG. 4) with one hole for inserting 2) fixed and sandwiched with a brazing filler metal are repeated twice and stacked on top of that. First separator (1
1) Turn over and put the low temperature fluid introduction header (1) and the low temperature fluid outflow header (2) into the above two headers.
It has a structure in which it is inserted into the holes (23, 24) to be attached, and the covers (16a, 16b, 17a, 17b) are placed on the upper and lower sides.

The method of fixing each member will be described. When the brazing material is sandwiched, it is heated to a high temperature to melt and fix the brazing material. Also, the first separator (9) and the second separator (10),
The outer edges of the second separator (10) and the third separator (11), as well as the first separator (9) and the lower cover (16a, 16).
b), inner edges of holes through which the respective headers (1, 2) of the second separator (10) and the third separator (11) and the first separator (9) and the upper covers (17a, 17b) are inserted. Are fixed by welding. In addition, each header (1, 2) is a lower cover (16a, 16b)
And weld to the upper covers (17a, 17b) to fix.

Embodiment 2 As shown in FIGS. 5-8, the embossed portions (22c, 22d) of the third separator (11) are replaced by the embossed portions (22c, 22d) of the third separator (11) shown in FIG. A fourth separator (27) as shown in FIG. 6 cut off is used, and a low temperature fluid introduction header (between the lowermost second separator (10) and the lower covers (16a, 16b) is used. 1)
And a ring (30) around the cold fluid outflow header (2).
a, 30b) are welded and fixed and the top third separator (1
A ring (30a, 30b) is welded and fixed around the low temperature fluid inflow header (1) and the low temperature fluid outflow header (2) between the upper cover (17a, 17b) and 1). Plate and fin type heat exchanger. Example 3 A plate-fin heat exchanger having the same structure as in Example 1 except that the second separator (10) turned upside down was used as the third separator (11).

Example 4 Two oblique flow path members (20, 21) for the high temperature fluid flow path (13) and two oblique flow path members (18, 19) for the low temperature fluid flow path (12)
Example 1 except that the shape of FIG. 9C is changed to that of FIG.
A plate-fin heat exchanger with the same structure as. In addition,
The oblique flow path member of FIG. 9A is the same as the two oblique flow path members (20, 21) for the high temperature fluid flow path (13) of Example 1, and the oblique flow path member of FIG. The oblique flow path members are the same as the two oblique flow path members (20, 21) for the low temperature fluid flow path (13) of the first embodiment.

In the first embodiment, the offset fins shown in FIGS. 4B and 4D are used as the heat transfer enhancer of the present invention. A plate-containing straight fin, a wave fin having a corrugated fin passage up and down, and the like can also be used.

In the first embodiment, the heat transfer enhancer (1) for the low temperature fluid flow path (12) is provided on the first separator (9).
4) and two oblique flow path members (18, 19) are fixed with a brazing filler metal sandwiched between them, and a second separator (10) is placed on the fixed flow path members (18, 19), and a heat transfer accelerator for the high temperature fluid flow path (13) (15) and two diagonal flow path members (2
0, 21) fixed with a brazing filler metal sandwiched between them, and a heat transfer accelerator (14) for the low temperature fluid flow path (12) on the third separator (11).
And two diagonal flow path members (18, 19) fixed with a brazing filler metal sandwiched between them are repeatedly stacked twice, and the first separator (9) is placed upside down and welded around them. The plate-fin type heat exchanger is manufactured by melting and fixing the brazing material and attaching the low temperature fluid introduction header (1) and the low temperature fluid outflow header (2). ) Underneath, the heat transfer enhancer (14) for the low temperature fluid flow path (12) and the two oblique flow path members (18, 19) are mounted and brazed and fixed, and the third separator (11) The heat transfer enhancer (15) for the high temperature fluid flow path (13) and the two oblique flow path members (20, 21) fixed by brazing under the A plate-fin type heat is obtained by brazing and fixing a heat transfer enhancer (14) for the low temperature fluid flow path (12) and two oblique flow path members (18, 19) under the inside out. Exchange It can be prepared by other methods such as granulation.

The present invention is not limited to those described in the above embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0019]

According to the present invention, the separator of the plate-fin heat exchanger, the heat transfer enhancer, the oblique flow path member, and the cover are made symmetrical, and the header is provided inside the oblique flow path member. By making the third separator the same shape as the second separator turned upside down, and making the fourth separator the same shape as the third separator without the embossed part, It has an excellent effect. ( 1 ) Since the separators and the like are symmetrical and the header is provided inside the oblique flow path member, the header is uniformly heated, and deformation due to thermal stress can be prevented.

( 2 ) Since the oblique flow path member is also provided on the rear side of the header, the entire header is heated uniformly and the strength on the rear side of the header is increased, so that no reinforcing member is required. ( 3 ) By arranging the plate / fin type heat exchanger separator, the heat transfer promoter, the oblique flow path member, and the cover symmetrically,
The separator, the oblique flow path member, and the cover can be shared. (4) By designing the second separator to have the same shape as the first separator turned upside down, it is not necessary to design and manufacture the second separator. (5) Since the fourth separator has the same shape as the third separator without the embossed part, the third separator can be manufactured by deleting the embossed part. It is easy and requires only a few days to manufacture, and the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a plate / fin heat exchanger according to an embodiment of the present invention.

FIG. 2 is a top view of the plate-fin heat exchanger according to the embodiment of the present invention.

3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view of each member of the plate-fin heat exchanger of FIG.

FIG. 5 is an enlarged sectional view of a plate-fin heat exchanger according to another embodiment of the present invention.

6 is a perspective view of a fourth separator of the plate-fin heat exchanger of FIG.

FIG. 7 is an explanatory view showing a method of manufacturing the fourth separator of FIG.

8 is a perspective view of a ring of the plate-fin heat exchanger of FIG.

FIG. 9 is an explanatory diagram of a diagonal flow path member according to another embodiment of the present invention.

FIG. 10 is a perspective view of a conventional plate-fin heat exchanger.

11 is a plan view of the plate-fin heat exchanger of FIG. 11. FIG.

12 is a cross-sectional view taken along the line AA of FIG.

13 is a sectional view taken along line BB of FIG.

FIG. 14 is a perspective view of each member of the plate-fin heat exchanger of FIG.

[Explanation of symbols]

1 Low temperature fluid inflow header 2 Low temperature fluid outflow header 3a, 3b, 3C, 3d Oblique AC section 4, 4a Counterflow section 5, 5a, 5b High temperature fluid flow inlet 6, 6a, 6b High temperature fluid outlet 7 Cryogenic fluid 8 High temperature fluid 9, 9a First separator 10, 10a Second separator 11, 11a Third separator 12, 12a Cryogenic fluid flow path 13, 13a High temperature fluid flow path 14, 14a Heat transfer accelerator for low temperature fluid flow path 15, 15a High temperature fluid flow path Heat transfer enhancer 16, 16a, 16b Lower cover Cover on 17, 17a, 17b 18, 18a Oblique flow path member on the inflow side of the low temperature fluid flow path 19, 19a Oblique flow path member on the outflow side of the low temperature fluid flow path 20, 20a Oblique flow path member on the inflow side of the high temperature fluid flow path 21, 21a Oblique flow path member on the outflow side of the high temperature fluid flow path 22a 22b, 22c, 22d Embossed section 23, 23a Hole to insert separator header 24, 24a Hole to insert separator header 25,25a Edge of first separator 26 Reinforcement material 27 Fourth Separator 28 Hole to insert the fourth separator header 29 Hole for inserting the fourth separator header 30a and 30b rings

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuo Nagamori Inventor Kazuo Nagamori No. 229 Togaya, Mizuho-cho, Nishitama-gun, Tokyo Inside the Mizuho Plant of Kawashima Harima Heavy Industries Co., Ltd. (56) Reference JP-A-2-275292 (JP, A) Flat 7-35492 (JP, A) JP 62-242791 (JP, A) Actually opened 61-175763 (JP, U) Actually opened 63-80484 (JP, U) Actually opened 63-36879 (JP , U) Actual development 61-175780 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F28D 1/03 F28D 9/00 F28F 3/08 301 F28D 9/02

Claims (4)

(57) [Claims] 1. Two holes (23, 2) are provided around which a raised edge (25) is provided and into which two headers (1, 2) below are inserted.
4) The left-right symmetric type first separator (9) provided on the front and the back of the left-right symmetric type heat transfer enhancer (1) for the low temperature fluid flow path (12).
4) and insert the following headers (1, 2) inside
Hole 1 provided with mounting allowed <br/> symmetrical shape of the mixed flow passage member (18, 19) and the following header (1,2) provided with a rim (25) which is one step lower around thereon inserting two holes a (23, 24)
It is provided at the same position as the first separator (9), and
The raised embossed parts (22a, 22a ) around the holes (23, 24)
second separator symmetrical shape having a b) and (10), the hot fluid flow path (13) symmetrically-shaped heat transfer enhancement member for (15) and two
Provide one hole for inserting the following header (1, 2) inside the
The left and right symmetrical oblique flow path members (20, 21) and the raised edges (25) around the periphery are provided, and two holes (23, 24) for inserting the following headers (1, 2) are first isolated. Similar to board (9)
The third separator (11) having a symmetrical shape with the embossed portions (22c, 22d) provided at various positions and around the two holes (23, 24) being lowered, and a low temperature. A symmetrical heat transfer enhancer (14) for the fluid flow path (12) and the following headers inside the two
(1,2) stacked repeatedly inserted one a bore provided with a symmetrical type mixed flow channel member (18, 19) and at least once a mounting Turn the first separator (9) thereon The low temperature fluid inflow header (1) and the low temperature fluid outflow header (2) as described above.
Plate fin type characterized by inserting two headers into holes (23, 24) for attachment, and further mounting and fixing covers (16a, 16b, 17a, 17b) on the top and bottom Heat exchanger. 2. A fourth separator (27) having the same shape as the one obtained by cutting off the embossed portions (22c, 22d) of the third separator (11) instead of the first separator (9), Inflow of cryogenic fluid between the bottom second separator ( 10 ) and the lower covers (16a, 16b) and between the top third separator (11) and the upper covers (17a, 17b). The plate-fin type heat exchanger according to claim 1, wherein rings (30a, 30b) are fixed around the header (1) and the low temperature fluid outflow header (2). 3. The plate-fin type heat exchanger according to claim 1, wherein the third separator (11) has the same shape as that of the second separator (10) turned inside out. . 4. The plate-fin type heat exchange according to claim 3, wherein the fourth separator (27) is manufactured by removing the embossed portions (22c, 22d) of the third separator (11). Method for manufacturing the fourth separator (27) used at the bottom and top of the container.