JP2001127223A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger which is improved in performance by enhancing its boundary layer leading edge effect. SOLUTION: A board 10 is provided on a heat exchange objective part in such a manner where the heat exchange objective part absorbs or releases heat, thin plate-like fins 12 where a flow of air passes through a space 13 between the fins 12 are provided to the board 10 upright, and parts 14 which are cut out and lifted up and provided with openings arranged in front and rear confronting the direction of an air flow are provided to the fin 12. A leading edge distance is elongated through the cut/lift part 14, and an air flow passing between the fins 12 hits the leading edges of the cut/lift parts to get turbulent, by which a heat exchanger of this constitution can be improved in heat, dissipating properties, more enhanced in boundary layer leading edge effect, and improved in heat exchange performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used for heat exchange or heat exchange of a semiconductor having a Peltier effect.

[0002]

2. Description of the Related Art A conventional heat exchanger of this kind is shown in FIGS.
As shown in FIG. 7, a plurality of fins 2 are protruded and arranged on the surface of the substrate 1, and in order to position the fins 2 at a constant interval, the tip of a flat plate 3 protruding from the fins 2 is applied to an adjacent fin 2. I have. The air is flowed by the fan 4 at a predetermined interval between the fins 2 to exchange heat with the heat transmitted to the substrate 1 and the fins 2 to radiate heat.

In another heat exchanger, as shown in FIG. 18, a horizontal protruding piece 5 sequentially increasing in size from the top to the bottom is provided on both sides of a plurality of fins 2 standing on the surface of the substrate 1. Had been provided. Then, an airflow indicated by a solid line is caused to flow from above the fins 2 and impinge on the protruding pieces 5, thereby changing the direction to the depth 6 between the protruding pieces 5, and a part of the fin 2 and each of the protruding pieces 5. The heat exchanged with the heat transmitted to the substrate 1 and the fins 2 flowing along the gap and dissipating heat.

[0004]

In the former heat exchanger, the flat plate 3 enhances heat dissipation by positioning the fins 2 and causing turbulence in the flow of the wind. There is no specific indication of enhancing the effect.

[0005] In the latter heat exchanger, the surface area of the side surface of the fin 2 is increased by each protruding piece 5 to further enhance the heat exchange performance. However, the leading edge effect of the fin 2 in the boundary layer is enhanced. It is not shown. Further, it is necessary to use a large amount of material in order to increase the surface area, which leads to an increase in material cost and weight.

The present invention relates to a heat exchanger which solves the above-mentioned problems of the prior art, and aims to improve the heat exchange capacity by increasing the leading edge effect of the boundary layer while keeping the material cost and weight low. .

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a substrate provided so as to be able to exchange heat with a heat-exchangeable or heat-exchanging portion, and a plurality of substrates provided in an upright state from the substrate. And a thin plate-like fin through which an airflow flows, and a plurality of cut-and-raised portions having openings facing the airflow direction at the front and rear sides of the fin.

According to this technical means, the leading edge distance is increased by cutting and raising, and the airflow flowing between the fins hits the leading edge of the cutting and raising, the boundary layer leading edge effect is enhanced, the heat exchange amount is increased, and the capacity is increased. Can be improved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A heat exchanger according to a first embodiment of the present invention is provided with a substrate provided so as to be able to transfer heat to a heat exchange target that generates or absorbs heat, and a plurality of substrates provided in an upright state from the substrate, and an air flow between them. With flowing thin fins,
A plurality of cut-and-raised portions having front and rear openings facing the airflow direction are provided on a side surface of the fin by press working.

In the above embodiment, the distance of the leading edge caused by the cut-and-raised portion is increased, and the heat exchange airflow flowing between the fins is not limited to the leading edge of the fin but also the heat radiation effect of the turbulent flow hitting the leading edge of the cut-and-raised portion. Rather, it has the effect of increasing the boundary layer leading edge effect.

[0011] The heat exchanger according to the second embodiment of the present invention comprises:
In the first aspect, the cut-and-raised portions are provided so that the legs rising from the adjacent cut-and-raised fins are not located at the same position.

In the above-described embodiment, not only the same action as in the first embodiment but also the legs rising from the cut-and-raised fins adjacent to the fins are displaced so as not to be at the same position. In the part where the leg and the next cut-out do not overlap, the leading edge effect occurs in the cut-out on the downstream side after the temperature boundary layer of the cut-up on the upstream side has recovered, so that An effective boundary layer leading edge effect is obtained, and this has the effect of further increasing the boundary layer leading edge effect.

[0013] The heat exchanger according to the third embodiment of the present invention comprises:
In the first or second aspect of the present invention, the cut-and-raised arrangement is such that the arrangement of the legs rising from the cut-and-raised fins is inclined with respect to the airflow direction.

[0014] In the above embodiment, as a result of the row of the cut-and-raised legs being arranged to be inclined with respect to the airflow direction,
Embodiment 2 because the legs of adjacent cut-and-raised portions do not overlap
Has the same function as. Also, each fin cut and raised
It can be molded with the same mold and the fin molding mold can be made compact.

[0015] The heat exchanger according to the fourth embodiment of the present invention comprises:
4. The cut-and-raised arrangement according to any one of claims 1 to 3, wherein the cut-and-raised fins are arranged such that the arrangement of the legs rising from the fins forms an angle toward the substrate with respect to the airflow direction. It is.

In the above embodiment, not only the same action as in the third embodiment, but also the heat exchange airflow flowing between the fins is guided by the cut and raised to flow more toward the substrate closer to the heat source. Has the effect of increasing heat exchange.

The heat exchanger according to the fifth embodiment of the present invention comprises:
In any one of claims 1 to 4, the cut-and-raised portions are provided alternately on both side surfaces of the fin.

In the above-described embodiment, the leading edge distance due to the cut-and-raised becomes longer, and the heat exchange airflow flowing between the fins is not limited to the leading edge of the fin but also to the radiating effect of the turbulent flow at the leading edge of the cut-and-raised portion. Rather, the enhanced boundary layer leading edge effect has the effect of occurring on both sides of the fin.

The heat exchanger according to the sixth embodiment of the present invention comprises:
In any one of claims 1 to 5, the cut-and-raised portions are provided with an interval between adjacent cut-and-raised portions.

In the above embodiment, since there is an interval between the cut-and-raised portions, the downstream-side cut-and-raised portion is recovered after the temperature boundary layer of the cut-and-raised portion is sufficiently recovered as compared with the case where the cut-and-raised portions are arranged continuously. Since the leading edge effect is generated by cutting and raising, a more effective boundary layer leading edge effect is obtained, and the cutting and raising processing and the mold can be simplified.

The heat exchanger according to the seventh embodiment of the present invention comprises:
In any one of claims 1 to 6, the cut and raised portions are provided so as not to be at the same position as the cut and raised portions of the adjacent fins.

In the above embodiment, the adjacent fins are dispersed without the cut and raised portions being located at the same position.
After the boundary layer has sufficiently recovered from the upstream cut-and-raised portion, the leading edge effect occurs in the cut-and-raised portion on the downstream side, so that a more effective boundary layer leading-edge effect can be obtained and the airflow flowing between the fins can be smoothed. It has the effect of making the performance uniform.

The heat exchanger according to the eighth embodiment of the present invention comprises:
In any one of claims 1 to 7, the cut-and-raised portion is provided at a portion closest to a heat exchange target that generates or absorbs heat.

In the above embodiment, the cut-and-raised portion can be efficiently arranged at the heat exchange target where heat is generated or absorbed.
It has the function of optimizing the position of cutting and raising.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heat exchanger according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 is a schematic perspective view of a heat exchanger showing an embodiment corresponding to the first aspect of the present invention, FIG. 2 is a front view of the same main part, and FIG. It is shown.

Numeral 10 is a rectangular substrate provided so as to be able to transfer heat to or from a heat exchange target which generates or absorbs heat. The substrate is made of a metal having a certain thickness, such as copper or aluminum, which has good heat conductivity, and has a Peltier effect on the back surface. Is joined. Reference numeral 12 denotes a plurality of thin fins made of a metal body such as copper or aluminum having good heat conductivity, through which a plurality of sheets 13 are provided integrally from the substrate 10 in an upright state at equal intervals, and an air flow for heat exchange indicated by an arrow 13 flows therebetween. , 14 are provided on the center of one side of the fin 12 so as to be opposed at right angles to the airflow direction indicated by arrow A in FIG. Five cut-and-raised portions are juxtaposed with an interval 16 to form one group, and the cut-and-raised groups are juxtaposed with a large interval 17. Reference numerals 18 denote upper and lower legs integrally rising from the side surfaces of the fins 12 in order to cut and raise the cut and raised portions 14 to a predetermined height. Reference numeral 19 denotes a fan for flowing gas between the fins 12 and is arranged on the left front edge side of the fins 12.

In the above embodiment, the heating element 1 that worked
1 is conducted from the substrate 10 to each fin 12 and is radiated mainly to the air from both sides of each fin 12 and the cut-and-raised portion 14, and the substrate 10 between the fins 12.
Heat is also released into the air. On the other hand, the air from the fan 19 causes air to flow through the space 13 between the fins 12 and the openings 15 before and after the cut-and-raised portion 14 as shown by the arrows.
Heat is transferred between the two substrates 10 and radiated into the flowing air.

In particular, the fin 12 is cut and raised 14
As a result, the leading edge distance becomes longer, and the airflow due to the wind from the fan 19 hits the leading edge of the fin and the leading edge of the cut-and-raised portion, so that not only the heat radiation effect due to turbulence but also the leading edge effect of the boundary layer can be enhanced.

In the above embodiment, the fan 19 is arranged on the left front edge of the fin 12, but the wind is sent toward the substrate 10 from the right front edge of the fin 12 or directly above the fin 12, and the direction of the wind is changed against the substrate 10. The airflow may be arranged so that the airflow flows left and right.

(Embodiment 2) FIG. 4 is a front view of a main part of a heat exchanger according to an embodiment corresponding to the second aspect of the present invention. FIG. 5 is a side view of the heat exchanger. Are omitted because they are the same. The present invention is different from the first embodiment only in that the legs of the fins are not located at the same positions as the legs of the adjacent fins. Are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

Each raised portion 14 of the fin 12
Is the leg 1 of the cut-and-raised 14 adjacent to the leg 18a.
The fins 12 are provided so as to be displaced in the vertical direction so as not to be at the same position as 8a.

In the above embodiment, the same operation and effect as those of the first embodiment are obtained, and the leg 18a of each cut-and-raised portion 14 does not partially overlap with the leg portion 18a of the adjacent cut-and-raised portion 14. After the temperature boundary layer of the cut-and-raised portion 14 on the upstream side of the wind is recovered, the leading-edge effect is generated on the cut-and-raised portion 14 on the downstream side, so that a more effective leading-edge effect is obtained. Further, the leg portion 18a can raise not only the heat radiation effect by the turbulent flow when the airflow due to the wind from the fan 19 hits each leading edge as shown by the arrow and the leading edge of the leg portion, but also enhances the leading edge effect of the boundary layer. .

(Embodiment 3) FIG. 6 is a front view of a main part of a heat exchanger according to an embodiment corresponding to the third aspect of the present invention, and FIG. 7 is a side view of the heat exchanger. Are omitted because they are the same. The present invention differs from the first embodiment only in that the arrangement of the legs in each of the cut-and-raised fins is provided so as to be inclined with respect to the airflow direction. Portions are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

Each of the cut-and-raised portions 14 of the fins 12 is
8b is provided so as to be gradually inclined upward with respect to the airflow direction indicated by the arrow.

In the above embodiment, the same operation and effect as those of the first embodiment can be obtained.
As a result of the arrangement of the legs 18b being inclined upward with respect to the airflow direction indicated by the arrow, the legs 18b of the adjacent cut-and-raised portions 14 do not partially overlap, as in the second embodiment. The cut-and-raised portion 14 does not enter the temperature boundary layer of the wind-and-raised portion, so that the leading edge effect is higher, and the airflow due to the wind from the fan 19 is in front of each cut-and-raised portion and its legs as shown by arrows. In addition to the heat dissipation effect due to the turbulence on the edge, the leading edge effect of the boundary layer can be further enhanced.
Further, each of the cut-and-raised portions 14 of the fin 12 can be sequentially fed and formed by the same die, so that the die for forming the fin can be made compact and the productivity can be improved.

(Embodiment 4) FIG. 8 is a front view of a main part of a heat exchanger showing an embodiment corresponding to the invention of claim 4, FIG. 9 is a side view of the same, and FIG. Are omitted because they are the same. The present invention is different from the first embodiment only in that the arrangement of the legs in each cut-and-raised fin is provided so as to form an angle toward the substrate with respect to the airflow direction. The same reference numerals are given to the portions having the structure and operation and effect, detailed description is omitted, and different portions will be mainly described.

Each of the cut-and-raised portions 14 of the fins 12 is
The arrangement of 8c is provided so as to form an inclination angle gradually approaching the substrate 10 side with respect to the airflow direction indicated by the arrow.

In the above embodiment, the same operation and effect as those of the first embodiment can be obtained, and each cut-and-raised portion 14
Is provided so that the arrangement of the legs 18c is inclined so as to gradually approach the substrate 10 side with respect to the airflow direction indicated by the arrow.
The air flow for heat exchange flowing between the fins 12 is guided by the cut-and-raised portions 14 as shown by arrows, flows more toward the substrate 10, and also actively interacts with the substrate 10 corresponding to the bottom of the fins 12. Performance can be improved because of efficient heat exchange.

In the same manner as in the third embodiment, the leg 18c of the cut-and-raised portion 14 is connected to the leg portion 1c of the adjacent cut-and-raised portion 14.
8c, the cut-and-raised portion 14 does not enter the temperature boundary layer of the windward and raised portion, so that the leading edge effect is higher, and the airflow due to the wind from the fan 19 is indicated by the arrow. The cut-and-raised portion and the front edge of the leg portion can not only dissipate the heat due to turbulence but also enhance the front edge effect of the boundary layer.

(Embodiment 5) FIG. 10 is a front view of a main part of a heat exchanger showing an embodiment corresponding to the fifth aspect of the present invention.
1 is a side view of the same, and the heating element and the fan in FIG. 1 are omitted because they are the same. The present invention is different from the first and fourth embodiments only in that the fins are cut and raised alternately on both side surfaces of the fins. , Detailed description is omitted, and different points will be mainly described.

The cut-and-raised portion 14 of the fin 12 is
2 are arranged alternately and continuously on both side surfaces, and are arranged so as to have an inclination gradually approaching the substrate 10 with respect to the airflow direction indicated by the arrow.

In the above embodiment, the same operation as in the first and fourth embodiments is performed on both side surfaces of the fin 12, so that it corresponds to the bottom of the space 13 between the fins 12 and positively contacts the substrate 10 near the heat source. Heat exchange and cut and raise 1
4 can further enhance the leading edge effect of the boundary layer.

That is, each cut-and-raised portion 14 is
Are continuously and alternately provided on both side surfaces of the fin 12, and the arrangement of the legs 18c is inclined so as to gradually approach the substrate 10 side with respect to the airflow direction indicated by the arrow. The air flow for heat exchange flowing through the fins 13 is cut and raised from both adjacent fins 12 as shown by arrows.
4 and flow toward the substrate 10 more, and the fins 12
Active exchange of heat with the substrate 10 corresponding to the bottom of the space 13 can further improve the performance.

Also, since each of the cut-and-raised portions 14 is alternately cut and raised on both side surfaces of the fin 12, the leg portions 18c of the cut-and-raised portions 14 on both side surfaces of the fin 12 are in line with the leg portions 18c of the adjacent cut-and-raised portion 14. Since the parts do not overlap, the cut-out 14 does not enter the temperature boundary layer of the wind-up cut-out, so that the leading edge effect is higher, and the fan 19
As shown by the arrows, the airflow caused by the wind from the air strikes each of the cut-and-raised portions and the front edge of the leg portion, so that not only the heat radiation effect due to turbulence but also the boundary layer front edge effect can be further enhanced.

(Embodiment 6) FIG. 12 is a front view of a main part of a heat exchanger showing an embodiment corresponding to the sixth aspect of the present invention.
3 shows the same side view, and the heating element and the fan in FIG. 1 are omitted because they are the same. The present invention is different from the first and fourth embodiments only in that the fins are cut and raised with an interval between adjacent cuts and raised, and the other structures and effects are the same. Portions are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

Each of the cut-and-raised portions 14 of the fin 12 has a space 16 between adjacent cut-and-raised portions 14.
Are alternately cut and raised on both side surfaces of the sheet. The cut-and-raised portions 14 are arranged so as to have an inclination gradually approaching the substrate 10 side in the airflow direction indicated by the arrow.

In the above embodiment, each cut-and-raised portion 14
Are alternately cut and raised on both sides of the fin 12 with an interval 16 between adjacent cuts and raised portions 14, so that continuous cut and raised portions with no space between them are cut and raised more than when the fins are arranged. Can be reliably formed, the operation thereof can be simplified, and the mold can be relatively easily formed.

In this embodiment, because of its structure, the interval between the cut-and-raised portions is widened and the temperature boundary layer of the cut-and-raised portion on the windward side is sufficiently recovered. It is suppressed by a slight decrease, while the air resistance is reduced and the wind becomes easier to flow.

(Embodiment 7) FIG. 14 is a top view of a heat exchanger showing an embodiment corresponding to the invention of claim 7, and FIG.
The heating element and the fan in are the same and are omitted. The present invention is different from the first embodiment only in that the cut-and-raised fins are provided so as not to be at the same position as the cut-and-raised adjacent fins. Portions are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

The cut-and-raised portions 14 of the fins 12 are alternately provided on both side surfaces of the fins 12 at equal intervals so as not to be at the same position as the cut-and-raised portions 14 of the adjacent fins 12. The cut-and-raised portion 14 is not shown, but the substrate 1 is moved in the airflow direction as in FIG.
They are arranged so as to form a slope that gradually approaches the zero side.

In the above embodiment, the cut-and-raised portions 14 provided on both side surfaces of the fins 12 are shifted at equal intervals so that the cut-and-raised portions 14 of the adjacent fins 12 are not located at the same position. 14, the group is dispersed along the direction of air flow in the space 13 between the fins 12,
After the temperature boundary layer of the upstream cut-and-raising is sufficiently recovered, the leading edge effect is caused by the cut-and-raise on the downstream side, so that a more effective boundary-layer leading-edge effect is obtained, and the airflow indicated by the flowing arrow is generated by the fin 12. Example 13 flows smoothly and uniformly through the space 13.
The same boundary layer leading edge effect as in the invention of the first aspect is uniformly generated in the entire fin 12, and the performance can be made uniform.

(Eighth Embodiment) FIG. 15 is a side view of a heat exchanger showing an embodiment corresponding to the invention of claim 8, and FIG.
Are omitted because they are the same. The present invention differs from the first and fourth embodiments only in that the fins are cut and raised at the nearest portion of the heat exchange or heat exchange target portion. The same reference numerals are given to the portions to be played, detailed description is omitted, and different portions will be mainly described.

The fins 12 are provided with three groups of the cut-and-raised portions 14 at the nearest portion of the heating element 11 joined to the back surface of the substrate 10 which is a heat exchange target where heat is generated or absorbed. The arrangement of the cut-and-raised portions 14 is arranged so as to form an inclination that gradually approaches the substrate 10 side with respect to the airflow direction.

In the above embodiment, since the cut-and-raised portions 14 are concentrated on the fins 12 closest to the heating element 11, the cut-and-raised portions 14 can be efficiently performed where heat exchange is required most, and the number thereof is optimized. Becomes possible.

In this embodiment, it is needless to say that the same operation and effect as the invention of the fourth embodiment can be expected due to its structure. In other words, each cut-and-raised portion 14 has a leg portion 18c.
Are arranged so as to gradually approach the substrate 10 side with respect to the airflow direction indicated by the arrow. As a result, the airflow for heat exchange flowing between the fins 12 is cut off as shown by the arrow. The flow is more guided to the substrate 10 by the raising member 14 and the substrate 10 corresponding to the bottom of the space 13 between the fins 12 actively exchanges heat, so that the performance can be improved.

The leg 18c of the cut-and-raised portion 14 does not partially overlap the leg 18c of the adjacent cut-and-raised portion 14, so that the cut-and-raised portion 14 enters the temperature boundary layer of the wind-raised portion. The leading edge effect is higher, and the airflow due to the wind from the fan hits each cut and raised and the leading edge of its leg as shown by the arrow, not only the heat dissipation effect by turbulence but also the boundary layer leading edge effect Can be.

[0058]

As described above, claim 1 of the heat exchanger of the present invention.
The invention described in the above is provided with a substrate provided so as to be able to exchange heat to a heat exchange target portion that generates or absorbs heat, a plurality of sheets provided in an upright state from the substrate, and a thin plate-like fin through which an airflow flows, and On the side surface, a plurality of cut-and-raised portions having openings facing the airflow direction are provided.
By increasing the leading edge distance by the cut and raised, the leading edge effect of the boundary layer can be enhanced, and the heat exchange capacity can be improved.

According to a second aspect of the present invention, in the first aspect, the cut-and-raised portion is provided such that the legs rising from the adjacent cut-and-raised fins are not at the same position. As the cut-and-raised portion does not overlap with the adjacent cut-and-raised portion, the leading edge effect increases without entering the temperature boundary layer of the windward rising and rising portion, further enhancing the boundary layer leading edge effect and further increasing the heat exchange capacity. Can be improved.

According to a third aspect of the present invention, in the first or the second aspect,
The arrangement of the legs rising from the cut-and-raised fins is provided so as to be inclined with respect to the airflow direction, so that the adjacent cut-and-raised legs do not enter the temperature boundary layer of the wind-raised portion as much as it does not overlap The leading edge effect is increased, and the leading edge effect of the boundary layer is further enhanced, so that the heat exchange capacity can be further improved. In addition, each cut-and-raised fin can be formed by the same die, and the fin-forming die can be made compact.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the cut-and-raised portion is formed by using an arrangement of the leg portions rising from the fins of the cut-and-raised portion. It is provided so as to form an angle toward the substrate side with respect to the direction, so that more airflow flowing between the fins can be made to flow toward the substrate side closer to the heat source side to enhance heat exchange and improve performance.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the cut-and-raised portions are provided alternately on both side surfaces of the fin. In the surface, the leading edge distance by cutting and raising can be lengthened, and the leading edge effect of the boundary layer can be further increased to improve the heat exchange capacity.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the cut-and-raised portions are provided at intervals between adjacent cut-and-raised portions. It is more than a case where continuous cut-and-raised
Cut-and-raise processing and dies can be simplified.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects of the present invention, the fins adjacent to each other are provided so as to be shifted from each other so as not to be at the same position. By dispersing the fins so that the cut-and-raise of the adjacent fins does not occur at the same position, the air flow flowing between the fins can be made uniform and the entire heat exchange capacity can be made uniform.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the cut-and-raised portion is a portion closest to a fin at a heat exchange target portion which generates or absorbs heat. , The cut-and-raised portions can be efficiently arranged on the fins of the heat exchange target portion, and the position of the cut-and-raised portions can be optimized.

[Brief description of the drawings]

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

FIG. 2 is a front view of a main part of the heat exchanger.

FIG. 3 is a side view of the heat exchanger.

FIG. 4 is a front view of a main part of the heat exchanger according to the second embodiment.

FIG. 5 is a side view of the heat exchanger.

FIG. 6 is a front view of a main part of the heat exchanger according to the third embodiment.

FIG. 7 is a side view of the heat exchanger.

FIG. 8 is a front view of a main part of the heat exchanger according to the fourth embodiment.

FIG. 9 is a side view of the heat exchanger.

FIG. 10 is a front view of a main part of the heat exchanger according to the fifth embodiment.

FIG. 11 is a side view of the heat exchanger.

FIG. 12 is a front view of a main part of the heat exchanger according to the sixth embodiment.

FIG. 13 is a side view of the heat exchanger.

FIG. 14 is a top view of the heat exchanger in the seventh embodiment.

FIG. 15 is a side view of the heat exchanger in the eighth embodiment.

FIG. 16 is a perspective view of a heat exchanger in the related art.

FIG. 17 is an explanatory diagram of the operation of the heat exchanger.

FIG. 18 is a front view of another conventional heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Substrate 11 Heating element 12 Fin 14 Cut and raised 15 Opening 16 Spacing 18, 18a, 18b, 18c Leg

Claims (8)

[Claims] 1. A substrate provided so as to be capable of exchanging heat with a heat-exchangeable or heat-exchangeable portion, and a plurality of thin fins provided in an upright state from the substrate and having an airflow flowing therebetween. A heat exchanger provided with a plurality of cut-and-raised portions having front and rear openings facing the airflow direction. 2. The heat exchanger according to claim 1, wherein the cut-and-raised portions are provided such that legs rising from the adjacent cut-and-raised fins are not at the same position. 3. The heat exchanger according to claim 1, wherein the cut-and-raised arrangement is such that the arrangement of the legs rising from the cut-and-raised fins is inclined with respect to the airflow direction. 4. The cut-and-raised structure according to any one of claims 1 to 3, wherein the arrangement of the legs rising from the cut-and-raised fins is formed so as to form an angle toward the substrate with respect to the airflow direction. A heat exchanger according to item 1. 5. The heat exchanger according to claim 1, wherein the cut-and-raised portions are alternately provided on both side surfaces of the fin. 6. The heat exchanger according to claim 1, wherein the cut-and-raised portion is provided with a space between adjacent cut-and-raised portions. 7. The heat exchanger according to claim 1, wherein the cut-and-raised portions are provided so that the cut-and-raised portions of adjacent fins are not located at the same position. 8. The heat exchanger according to claim 1, wherein the cut-and-raised portion is provided at a portion closest to a heat exchange target that generates or absorbs heat.