JP2003004393A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger which is easy to manufacture, hardly causes fluid leakage, and has small pressure loss. SOLUTION: A plurality of fluid passages formed by a corrugated plate, a base plate, and a cover are alternately arranged to a plurality of passages A and a plurality of passages B, and the fluid A is supplied to the passage A. A heat exchanger for performing heat exchange by flowing fluid B through B, wherein at least one end of the plurality of fluid flow paths seals the open end of either flow path A or flow path B. By cutting a portion of the end of the corrugated plate and / or by folding a portion of the end of the corrugated plate to stop and make the corrugated end an outflow inlet for only one fluid A heat exchanger characterized in that the opposite end portions are each bent so as to be inclined and formed into a gable roof shape, at least a part of the partition end portions are brought into contact, and the contact portions are sealed by brazing. It is.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger which is easy to manufacture, is resistant to fluid leakage, and has a small fluid pressure loss.

[0002]

2. Description of the Related Art FIG. 10 shows an example of a conventional heat exchanger.
And FIG. 11 will be described. FIG. 11 shows the heat exchanger divided into main members, and FIG.
Base plate 5 joined to one side of corrugated 51
2 was shown. The corrugated gate 51 is shown in FIG. FIG. 11C shows the cover 54 joined to the other one side of the corrugate.

In FIG. 10, FIGS. 11A to 11C are shown.
The heat exchanger manufactured by joining the members of FIG. First, it demonstrates using FIG. A base plate 52 is joined to one side of the corrugated part 51 to form a plurality of flow paths A53. A plurality of flow paths B56 are formed by joining the base portion 55 of the cover 54 to the other one surface side of the corrugate 51. Further, the base plate 52 and the sleeve portion 57 of the cover 54 are joined, and the outlets 58 of the fluid A and the fluid B are respectively provided on the upper portion of the base plate 52 and the lower portion of the cover base portion 55.
59 is provided.

An opening at the lower end surrounded by the base plate 52 and the cover 54 is an inlet 61 for the fluid A, and a cylindrical body (not shown) for supplying the fluid A is provided at the inlet 61 for each flow path 53. ，
It is attached in the same direction as the length direction of 56. The opening at the upper end is an inlet 62 for the fluid B, and a cylindrical body (not shown) for supplying the fluid B is provided at the inlet 62 for each flow path 5.
It is attached in the same direction as the length direction of 3, 56. The upper end of the channel A53 and the lower end of the channel B56 are filled with the sealing material 60 and sealed.

In this conventional heat exchanger, fluid A and fluid B are used.
Through the respective cylinders and the respective inlets 61 and 62, the respective flow paths 53,
56, and the outlets 58, 59 of the respective flow paths 53, 56.
The heat exchange between the fluid A and the fluid B is performed via the corrugate by flowing out from each of the above.

[0006]

In the above conventional heat exchanger, the end of the corrugate near the inlet of the fluid is filled with a sealing material or the like for sealing. However, since the corrugate is thin and has a large sealing area, the sealing work is time-consuming and a sealing failure is likely to occur, and the fluid flows from the flow channel A to the flow channel B or from the flow channel B to the flow channel A. Sometimes leaked.

As a means for improving the airtightness, there is a method of crushing the end of the corrugate, but it cannot be completely sealed by simply crushing it. Also, FIG.
As shown in FIG. 0, the corrugated part 51 and the base plate 52 and the joint part between the corrugated part 51 and the cover 54 are also sealed with an adhesive or a sealing material. However,
This sealing work is troublesome, and a sealing failure is likely to occur, so that the fluid may leak like the corrugated end portion.

Further, the fluid supplied from the cylindrical body first collides with the filling material at the end of the corrugate when the flow area at the inlet decreases, and the direction of the fluid flow changes at a right angle inside. As a result, the fluid becomes extremely turbulent inside and the pressure loss increases, resulting in a larger fan and a higher electricity bill.

[0009] Incidentally, the pressure loss Delta] p of the fluid across the heat exchanger, the pressure loss when flowing through the pressure loss Delta] p _in, the fluid flow path by reducing the area and flow direction of the change in the heat exchanger inlet It is a value obtained by subtracting the pressure increase Δp _out due to the area expansion at the fluid outlet from the sum of Δp _core . Among these, since Δp _core and Δp _out are determined by design specifications, the reduction of pressure loss Δp depends on how to reduce Δp _in .

The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat exchanger which is easy to manufacture, is resistant to fluid leakage, and has a small pressure loss. is there.

[0011]

In order to solve the above-mentioned problems, the first aspect of the present invention comprises a corrugated plate, a base plate and a cover provided so as to sandwich the corrugated plate. A plurality of fluid channels are provided, and the plurality of fluid channels are a plurality of channels A and a plurality of channels B that are alternately adjacent to each other with a partition wall formed by a corrugated plate interposed therebetween. By flowing the fluid B into the flow path B of
A heat exchanger for exchanging heat between a fluid A and a fluid B via a partition formed of a corrugated plate, wherein either the flow channel A or the flow channel B is provided at at least one end of a plurality of fluid flow channels. A portion of the end of the corrugated plate to seal the open end of the corrugated plate to leave the corrugated end as an outlet for only one fluid and / or one of the ends of the corrugated plate. By folding the portion, the opposing end portions are bent to be inclined to form a gable roof, and at least a part of the partition wall end portions are brought into contact with each other,
A heat exchanger characterized in that the contact portion is sealed by brazing.

In a second aspect of the present invention, an end portion of the corrugated plate is cut into the cover or the base plate so as to leave a margin for brazing, and then the margin is brazed. The cover and / or the base plate and the end portion of the corrugated plate are hermetically sealed by the above.

According to a third aspect of the present invention, the corrugated plate and the base plate and / or the cover are brazed by a brazing material combined with a corrugate, and the flow passage A and the flow passage B are completely formed. It is a heat exchanger characterized by being divided into.

A fourth aspect of the present invention is the heat exchanger characterized in that the corrugate is a clad plate in which a brazing material is compounded on one or both sides of a core material.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. In all the drawings showing the embodiments of the present invention, components having the same function are designated by the same reference numeral, and therefore, repeated description is omitted.

(First Embodiment) A heat exchanger according to a first embodiment of the present invention will be described with reference to the perspective view of FIG. As a material for the corrugate, a clad plate in which a brazing material is compounded on both surfaces of a core material is used. The base plate 2 is joined to one side of the corrugate 1 to form a plurality of flow paths A3. A plurality of flow paths B6 are formed by joining the base portion 5 of the cover 4 to the other one side of the corrugate 1. Further, the base plate 2 and the sleeve portion 7 of the cover 4 are joined to each other, the outlet 8 for the fluid A is provided at the upper portion of the base plate 2, and the outlet 9 for the fluid B is provided at the lower portion of the cover base portion 5. Has been.

An opening at the lower end surrounded by the base plate 2 and the cover 4 is an inlet 28 for the fluid A, and a tubular body (not shown) for supplying the fluid A is provided at the inlet 28 for each flow path. It is attached in the same direction as the length direction of 3, 6. The opening at the upper end is an inlet 29 for the fluid B, and the inlet 29 has the fluid B
A cylindrical body (not shown) for supplying the gas is attached in the same direction as the length direction of the flow paths 3 and 6.

At the upper end of the flow path A3 and the lower end of the flow path B6, the corrugated end portions 10 are bent at their tips so that they are in contact with each other, and processed into a gable roof shape. Then, the minute gap at the tip 11 of the gable roof is filled with a bonding material, for example, a brazing material, and is brazed and sealed. Although the lower end of the channel B6 is not shown in FIG. 1, it is brazed and sealed in the same manner as the upper end of the channel A3. The corrugate 1 and the base plate 2, and the corrugate 1 and the cover 4 are
Bonding is performed by using an adhesive or a sealing material so that the fluid does not leak between the channel A and the channel B.

In the present embodiment, the reason for using the clad material for the corrugate 1 is that the flow path A and the flow path B are formed by brazing.
This is to seal and. In addition, the corrugated end 10 is bent so that the tip ends are in contact with each other, and the ends 11 are brought close to each other to fill a minute gap with a brazing material, and brazed to hermetically seal. The reason is that the corrugated end 10 can be easily sealed, and the fluid inlet 2
This is to alleviate the turbulent state near 8 and 29. In addition, the corrugate and the base plate, and the corrugate and the cover are joined by using an adhesive or a sealing material so that the fluid does not leak between the channel A and the channel B.

A method of sealing the tip 11 of the corrugated end 10 will be described with reference to FIGS. 2 (a) to 2 (c). First, a cut 14 having a predetermined length is formed in each fold 12 of the corrugated end portion 10 to form a piece 14, a piece 15, and a piece 16. Of the section 14, the section 15, and the section 16, the opposed section 14 and section 16 are used,
Bending from the position of the notch 13 using a predetermined mold (not shown) so that the tips 11 of the respective pieces are close to each other is formed into a gable roof shape. The ends 11 of the sections 14 and 16 that are close to each other are brazed with a brazing material and sealed.

Regarding the angle α17 formed by the section 14 and the section 16 formed in a gable roof shape shown in FIG. 2 (c),
The angle α is preferably 30 degrees or more and 120 degrees or less. The reason is that if the angle is less than 30 degrees, the slope becomes steep, the roof portion becomes high, and the design constraint becomes large. Further, if it exceeds 120 degrees, the effect of alleviating the turbulent state cannot be sufficiently obtained.

In FIG. 3, a piece 14 and a piece 16 are formed in the vicinity of their respective tips 11 so that the bent tip surfaces come into contact with each other. In the present example, an example is shown in which the tip end surface that is bent and formed in contact with each other is perpendicular to the fluid and has a low resistance. As in this example, by performing surface bonding at the contact portion 27,
The sealing can be improved.

(Second Embodiment) A heat exchanger according to a second embodiment of the present invention will be described with reference to the perspective view of FIG. As the shape of the corrugated end portion, the shape described with reference to FIGS. 2 and 3 for the heat exchanger of the first embodiment can be applied.

In the heat exchanger according to the second embodiment of the present invention, the base plate 2 is provided with an outlet 8 and an inlet 28 for the fluid A so that the fluid A flows in the passage A and the fluid B is the lower end of the passage B. From the inlet 29 to the outlet 9 at the upper end. In this heat exchanger, a clad plate in which a brazing material is compounded on one surface of a core material is used as a material for the corrugated material.

Both ends of the corrugation which constitutes the channel A are
The corrugated end portions 10 are bent so that the ends thereof are in contact with each other, and are processed into a gable roof shape. Then, the minute gap at the tip 11 of the gable roof is filled with a bonding material, for example, a brazing material, and is brazed and sealed. In this case, the inside of the gable roof is filled with the brazing material.

In this heat exchanger, both ends of the corrugation forming the flow path A can be easily sealed, the finish is good, and the pressure loss of the fluid B is reduced. The corrugate 1 and the base plate 2 are joined together by using an adhesive or a sealing material so that the fluid does not leak between the flow passage A and the flow passage B. Note that the attachment of the cover is not directly related to the leakage of the fluid between the flow path A and the flow path B, and thus any method may be used.

(Third Embodiment) The heat exchanger according to the third embodiment of the present invention is applied with the configuration described in FIG. 1 of the first embodiment. Also, regarding the corrugated end, the first
The forms described in FIGS. 2 and 3 of the embodiment can be applied.

The heat exchanger according to the present embodiment uses a clad plate in which a brazing material is compounded on both sides as a material for the corrugate.
Corrugate 1 and base plate 2, Corrugate 1 and cover 4
However, they are brazed and joined by the brazing material compounded to the corrugated. That is, the minute gaps formed between the corrugate 1 and the base plate 2 and between the corrugate 1 and the cover 4 are filled with the brazing filler metal melted at the time of heating and solidified after cooling so that the gaps are completely sealed. There is something.

(Fourth Embodiment) The heat exchanger according to the fourth embodiment of the present invention can be applied to the configuration described in the second embodiment with reference to FIG. Also, regarding the corrugated end,
The forms described in FIGS. 2 and 3 of the embodiment can be applied.

In this heat exchanger, a clad plate having a brazing material compounded on one surface is used as a material for the corrugated material. The corrugated body 1 and the base plate 2 are brazed and joined together by a brazing material compounded with the corrugated body. That is, a minute gap generated between the corrugate 1 and the base plate 2 is filled with a brazing filler metal melted at the time of heating, and is solidified after cooling to seal the gap. Note that the cover is not attached directly to the leakage of the fluid between the flow path A and the flow path B, and thus any method may be used.

According to the third embodiment and the fourth embodiment, it is not necessary to take time and labor like an adhesive or a sealing material. Further, since the clad plate is brazed and joined using a brazing material, the flow path A and the flow path B can be completely partitioned, and fluid leakage between the flow path A and the flow path B is eliminated. .

(Fifth Embodiment) The heat exchanger according to the fifth embodiment of the present invention is the same as the heat exchanger according to the first embodiment shown in FIG. In this embodiment, the corrugated end portion is formed in a roof shape, and the tip end of the corrugated end portion is processed so as to be close to it.

Regarding the present embodiment, FIG. 5 (a) to FIG.
An explanation will be given using (c). The heat exchanger uses, as a material for the corrugate, a clad plate in which a brazing material is compounded on both sides. First, a notch 33 is made from the end in advance at the corner fold formed by the short side 30 and the long side 31 at the end of the corrugate on one side.

Then, the short side 30 is bent at the same time as the roof side is bent so that the tips of the opposite long sides 31 come close to each other.
It is crushed in the direction of the bent long sides 31 facing each other and so as to wrap around the long sides 31 bent. At the time of crushing, as shown in FIG. 5C, the long side 31 and the short piece 30 are overlapped with their end faces aligned with each other, and the tips of the long sides 31 are bent and brought into contact with each other. It is desirable to form it vertically.

By carrying out such a forming process, the corrugated end portion 35 formed by the short piece 30 and the long side 31 can be formed in a substantially T shape. The minute gaps generated between the corrugate 1 and the base plate 2 and between the corrugate 1 and the cover 4 may be sealed with an adhesive or a sealing material, or a brazing material combined with the corrugation may be used for brazing. You can join them.

(Sixth Embodiment) As the heat exchanger of the sixth embodiment of the present invention, the configuration described in the second embodiment with reference to FIG. 4 is applied. Further, as the method of forming the corrugated end portion in the shape of a roof and bringing the leading end thereof close to each other, the form described in FIG. 5 of the fifth embodiment can be applied.

In the case of the fifth embodiment and the sixth embodiment, the end portion formed in the substantially T-shape has no cut and is continuous. Therefore, since the hole does not remain after the brazing by heating due to the notch, it is possible to surely seal. In addition, since the processing is performed using a dedicated mold, the work is extremely simple compared to the case where an adhesive or a sealing material is used.

(Seventh Embodiment) The heat exchanger according to the seventh embodiment of the present invention is the same as the heat exchanger according to the first embodiment described with reference to FIG. In this embodiment, the corrugated end portion is formed in a roof shape, and the tip end of the corrugated end portion is processed so as to be close to it.

Regarding the present embodiment, FIG. 6 (a) to FIG.
An explanation will be given using (d). The heat exchanger uses, as a material for the corrugate, a clad plate in which a brazing material is compounded on both sides. First, a cut 43 is made in advance from the upper end of the short side 40 of the corrugated end on one side. As for the cut, a cut 43 is made so that a glue margin 44 having a width of several mm or less is left on both sides of the short side 40 closer to the long side 41. That is, the notch 43 is made so that the end portion of the corrugated plate can be brazed to the cover or the base plate so that the glue margin 44 is left. It is sufficient that the margin 44 has a size width capable of being brazed,
It may be about 1 mm.

Next, the notch 43 on the short side 40 side is expanded outward. Next, the ends of the glue margins 44 facing each other on the widened short side 40 are brought into contact with each other so that their end faces are aligned with each other. It is desirable that the surfaces of the margins 44, which are brought into contact with each other by being bent, are perpendicular to each other.

Next, the opposite long side 41
At the same time as the roof is bent so that the front end portions of the two are close to each other, the short sides 42 are crushed in the direction of the bent long sides 41 and so as to wrap the bent long sides 41. For crushing, as shown in FIG. 6D, the long side 41 and the short piece 42 are brought into contact with each other so that their end faces are aligned with each other. It is desirable that the tips of the long sides 41 be bent so that the contact surfaces are vertical.

By performing such a forming process, the corrugated end portion 4 formed by the short pieces 40 and 42 and the long side 41.
5 can be formed in a substantially T shape. The minute gaps generated between the corrugate 1 and the base plate 2 and between the corrugate 1 and the cover 4 may be sealed with an adhesive or a sealing material, or a brazing material combined with the corrugation may be used for brazing. You can join them.

(Eighth Embodiment) As the heat exchanger according to the eighth embodiment of the present invention, the form explained in FIG. 4 of the second embodiment is applied. Further, the method described in FIG. 6 of the seventh embodiment can be applied to the method of forming the corrugated end portion in the shape of a roof and bringing the tip end close to each other.

In the case of the seventh embodiment and the eighth embodiment, the end portion formed in a substantially T-shape has no cut and is continuous. Therefore, since the hole does not remain after the brazing by heating due to the notch, it is possible to surely seal. In addition, since the processing is performed using a dedicated mold, the work is extremely simple compared to the case where an adhesive or a sealing material is used.

As described above, the present invention is applied to any heat exchanger that performs heat exchange through the corrugated, and its effect is exhibited.

[0046]

EXAMPLES Example 1 The present invention will be described in detail below with reference to examples. A heat exchanger having the structure shown in FIG. 1 was manufactured. The corrugated 1 is a JIS3003 alloy core material with both sides of which a JIS4045 alloy brazing material is combined, and a thickness of 0.5 m.
A corrugated gate made of a m-clad plate was used.

The end portion 10 serving as the upper end portion of the flow channel A3 and the end portion serving as the lower end portion of the flow channel B6 are processed in advance into a gable roof shape by the method described with reference to FIG. Let
In the subsequent heating step, a brazing material was filled in the minute gap at the tip and brazing was performed. The corrugated body 1 and the base plate 2 and the corrugated body 1 and the cover base portion 5 were bonded with an adhesive.

Example 2 A corrugate 1 and a base plate 2,
A heat exchanger having the structure shown in FIG. 1 was manufactured by the same method as in Example 1 except that the corrugated body 1 and the cover base body portion 5 were brazed and joined together by a brazing material compounded with the corrugated body.

Example 3 The same method as in Example 2 was repeated except that the corrugated end portion was shaped into a T-shape in a row without cutting by the method shown in FIG.
A heat exchanger having the structure shown in FIG. 1 was manufactured.

(Comparative Example 1) Corrugated 1 has a thickness of 0.5 m.
A corrugated gate made of a JIS3003 alloy plate of m. The end 10 that is the upper end of the flow path A3 and the end that is the lower end of the flow path B6 are processed into a gable roof shape in advance by the method described with reference to FIG. The sealing material 23 was filled in the minute gap and sealed. The corrugated body 1 and the base plate 2 and the corrugated body 1 and the cover base portion 5 were bonded with an adhesive. Except for the above, a heat exchanger having the structure shown in FIG. 1 was manufactured.

(Comparative Example 2) Upper end of channel A3 and channel B6
The rubber material 26 and the sealing material 23 are packed and hermetically sealed at the lower end portion of the gabled roof without performing a process such as forming a gable roof,
A heat exchanger having the structure shown in FIG. 1 was manufactured by the same method as in Comparative Example 1.

FIG. 7A shows a schematic plan view showing the upper end of the flow path A of the first embodiment. Similarly, FIG. 7B shows the second embodiment, and FIG. 7C shows the third embodiment.
Comparative Example 1 is shown in FIG. 7D, and Comparative Example 2 is shown in FIG. 7E.

In the first, second, and third embodiments, the tip 11 of the corrugated end 10 formed in the shape of a gable roof is made of the brazing material 25.
It is joined and sealed by. In Examples 2 and 3, the corrugate 1 and the base plate, and the corrugate 1 and the cover 4 are brazed together. Particularly, in the third embodiment, there is no cut at the end, and a substantially T-shaped portion integrally formed in a roof shape is continuous.

On the other hand, in Comparative Example 1, the tip 11 of the corrugated end 10 formed in the shape of a gable roof is the sealing material 2.
It is sealed at 3. In Comparative Example 2, the sealing material 2 was used as it was without forming the upper end into a roof shape.
3, or the sealing material 23 and the rubber material 26 are hermetically sealed.

With respect to each heat exchanger manufactured in Examples 1 to 3 and Comparative Examples 1 and 2, the hermeticity of the sealed corrugated end was examined. In addition, the pressure loss was examined for those with good sealing properties. The method for measuring the hermeticity will be described below with reference to FIG. First, the inlet of the fluid A of the heat exchanger is sealed, and the hose 18 is attached to the fluid A outlet 8 in a watertight state.

Next, the heat exchanger is submerged in water and the hose 18
High-pressure air is blown into the flow path A3 through. Then, the sealed corrugated end 1 near the fluid A outlet 8 of the heat exchanger
The presence or absence of bubbles 19 from 0 was observed and examined. Channel B
The same investigation was conducted for.

Each of the 200 heat exchangers was examined, and when the number of bubbles generated was 0, the sealing property was extremely good (⊚), when 5 or less, it was good (∘), and when 6 or more, it was poor. It was evaluated as (x). The results are shown in Table 1 as FIG.

As for the pressure loss, as shown in FIG. 9, wind tunnels 20 and 21 are attached to the inlet and the outlet of the fluid A, and the air is blown by a fan from the wind tunnel 21 attached to the inlet.
The air pressure difference between the two was checked by a fine differential pressure gauge 22. Pressure difference is 50
Less than Pa was evaluated as good (◯), and 50 Pa or more was evaluated as poor (x). The results are shown in Table 1 as FIG. Table 1 also shows the productivity.

As is clear from Table 1, No. In all of the products of the present invention 1 to 3, when the corrugated end portion was sealed, the corrugated tip was brought close to the narrowed sealing area, and the brazing method was used. Therefore, the sealing work can be easily performed, and the fluid hardly leaks.

In particular, there is no cut at the tip of the corrugate,
No. 1 formed in a continuous T-shape. 3 was excellent in hermeticity. Further, since the corrugated end portion is formed in the shape of a gable roof, the turbulent flow state of the fluid is relaxed and the pressure loss is reduced. Further, the corrugated tip and the corrugated and the base plate were simultaneously heated and brazed.
Regarding No. 2 and No. 3, not only the sealing property was excellent, but also the productivity was extremely excellent.

On the other hand, in Comparative Example No. In No. 4, the corrugated tip was formed into a gable shape, but since the corrugated end was sealed with a sealing material, the sealing work was troublesome and the sealing performance was poor. Furthermore, the corrugated end is sealed with a sealing material in a state where it is not gabled.
o. In No. 5, the airtightness was inferior and the vicinity of the fluid inlet was in an extremely turbulent state, resulting in increased pressure loss.

[0062]

As described above, according to the present invention, the fluid A is formed in each of the flow passage A and the flow passage B formed through the corrugated gate.
The present invention relates to a heat exchanger that causes the fluid B to flow and exchange heat between the fluid A and the fluid B. In the present invention, when sealing the corrugated end of the flow channel A or the flow channel B, the corrugated end is brazed by bringing the ends formed in the shape of a gable roof close to each other, so that the sealing work can be performed easily. The sealing result is also good. Further, the turbulent flow state of the fluid near the fluid inlet is relaxed, the pressure loss of the fluid is reduced, and the fan can be downsized and the electricity bill can be saved. Therefore, it has a remarkable industrial effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a method for sealing the end portion of the corrugate in the heat exchanger of the present invention.

FIG. 3 shows a corrugated end portion of the heat exchanger of the present invention,
It is explanatory drawing of another sealing method.

FIG. 4 is a perspective view showing a heat exchanger according to a second embodiment of the present invention.

FIG. 5 shows a corrugated end portion of the heat exchanger of the present invention,
It is explanatory drawing of another sealing method.

FIG. 6 shows a corrugated end portion of the heat exchanger of the present invention,
It is explanatory drawing of another sealing method.

7 (a) to (c) are Examples 1 to 3, respectively.
(D), (e) is a partial plan view showing the upper end of the flow path A of Comparative Examples 1 and 2.

FIG. 8 is an explanatory diagram of a method for checking the sealed state of the heat exchanger.

FIG. 9 is an explanatory diagram of a method for examining the pressure loss of the heat exchanger.

FIG. 10 is a perspective view of a conventional heat exchanger.

FIG. 11 is a view showing main members of a conventional heat exchanger.

FIG. 12 shows results of Examples and Comparative Examples shown in Table 1.

[Explanation of symbols]

1 Corrugate 2 Base plate 3 Flow path A 4 Cover 5 Base part of cover 6 Flow path B 7 Sleeve part of cover 8 Fluid A outlet 9 Fluid B outlet 10 Sealed corrugated end portion 11 Sealed corrugated end portion Tip 12 Corrugated fold 13 Cut in corrugated fold 14 Corrugated section 15 Corrugated section 16 Corrugated section 17 Fluid A outlet 18 Air hose 19 Air bubble 20 Wind tunnel 21 Wind tunnel 22 Micro differential pressure gauge 23 Sealant 24 Adhesive 25 Wax Material 26 Rubber material 27 Vertically standing portion of the tip of the corrugated end to be sealed 28 Fluid A inlet 29 Fluid B inlet 30 Short side 31 Long side 33 Notch 35 Corrugated end 40 Short side 41 Long side 42 Short side 43 notch 44 glue margin 45 corrugated end 51 corrugated 52 base plate 53 flow path A 54 cover 55 Cover base portion 56 Flow path B 57 Cover sleeve portion 58 Fluid A outlet 59 Fluid B outlet 60 Sealant 61 Fluid A inlet 62 Fluid B inlet

Claims (4)

[Claims] 1. A plurality of fluid flow paths formed by a corrugated plate, a base plate and a cover provided so as to sandwich the corrugated plate, wherein the plurality of fluid flow paths sandwich a partition formed by the corrugated plate. A plurality of flow paths A that are alternately adjacent to each other
And a plurality of flow paths B, the fluid A flowing through the plurality of flow paths A and the fluid B flowing through the plurality of flow paths B allow heat exchange between the fluid A and the fluid B through a partition wall formed by a corrugated plate. A heat exchanger for carrying out, wherein at least one end of a plurality of fluid flow paths, the open end of either the flow path A or the flow path B is sealed, and the corrugated end is the inflow / outflow port of only one fluid. In order to make it possible, a notch is made in a part of the end of the corrugated plate and / or a part of the end of the corrugated plate is folded to bend the opposite ends so as to be inclined respectively. A heat exchanger characterized by being formed into a gable roof shape, at least a part of the partition wall end portions being in contact with each other, and the contact portion being sealed by brazing. 2. An end portion of the corrugated plate is cut into the cover or the base plate so as to leave a margin for brazing, and then the margin is brazed, and / or by brazing the margin. The base plate and the end of the corrugated plate are hermetically sealed.
The heat exchanger described in. 3. A brazing material combined with a corrugated material,
The corrugated plate and the base plate, and / or the cover are brazed, and the flow path A and the flow path B are completely partitioned.
The heat exchanger described in. 4. The heat exchanger according to claim 1, wherein the corrugate is a clad plate in which a brazing material is compounded on one surface or both surfaces of a core material.