JPH0674675A - Laminate body heat exchanger and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a laminate body heat exchanger and a manufacture thereof which has no drop in the efficiency of the heat exchanger because of the effect of a contact heat resistance while achieving a handy designing of a production process and a reduction in production costs. CONSTITUTION:A laminate body heat exchanger has a plurality of slits formed parallel on a sheet comprising a high thermal conductive material such as copper and aluminum and a pin fin part 5 built up with a part left between slits. A fin element 1 which is provided with a rectangular hole 6 to form a refrigerant passage is laminated on both end sides in the longitudinal direction (vertical way) of the pin fin part 5 through a spacer 2 provided with a rectangular hole 7 alone corresponding to the rectangular hole 6 for forming the refrigerant passage of the fin element 1 so that the rectangular holes 6 and 7 form continuous through passages 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger constructed by laminating a plurality of fin elements and the like, and a method for manufacturing the laminated heat exchanger.

[0002]

2. Description of the Related Art FIG. 9 schematically shows a heat exchanger constructed by using a conventional pin fin radiator. Here, a pin fin radiator 101 formed by stacking a plurality of fins for heat radiation and a pipe 102 for a refrigerant flow path are alternately arranged, and the connecting portions of both are integrally joined by solder or the like to perform heat exchange. Vessels are configured.

As described above, in the conventional heat exchanger,
Since the radiator that constitutes the expanded heat transfer surface and the piping for the refrigerant flow path are manufactured separately, and the two are integrally joined by soldering or the like in the subsequent process, the radiator and the piping are There is a big problem that the heat exchange efficiency is lowered due to the influence of the contact thermal resistance that occurs.

Further, in order to suppress the above-mentioned influence of the contact thermal resistance as much as possible, it is necessary to devise a joining method of the radiator and the pipe, which complicates the manufacturing process of the heat exchanger and increases the manufacturing cost. There was also a problem.

[0005]

As described above, in the conventional heat exchanger, there are problems that the heat exchange efficiency is lowered due to the influence of the contact heat resistance, the manufacturing process is complicated, and the manufacturing cost is increased. It was

Therefore, the present invention solves the above problems,
An object of the present invention is to provide a laminated body heat exchanger and a method for producing a laminated body heat exchanger in which the heat exchanger efficiency does not decrease due to the influence of contact thermal resistance, and the production process can be simplified and the production cost can be reduced. To do.

[0007]

In order to achieve the above object, in the present invention, a fin element having fins and openings formed in a plate-shaped member formed of a heat conductive material is provided with a spacer element, A laminate heat exchanger, characterized in that a plurality of the openings are laminated so as to form a continuous through flow path,
The fin portion is configured by forming a plurality of slits in the plate-shaped member, and the fin portion is substantially composed of a plurality of pin-shaped fins. Provided is a featured laminate heat exchanger.

Further, the first fin element and the second fin element in which the fin portion and the opening portion are provided in the plate-like member formed of the heat conductive material are used as the first fin element and the second fin element. A laminated heat exchanger, characterized in that the openings of the fins constitute a continuous through flow path, and both fin elements are alternately laminated so that both fin portions are in a non-contact state with each other, and The first fin element and the second
Of the fin element and the openings of the first fin element and the second fin element manufactured by this step constitute a continuous through flow path, and both fin portions are not in contact with each other. So as to be in such a state that the fin elements are alternately laminated, and the outer surfaces of the first fin element and the second fin element laminated by this step or the joint portions of both are integrally joined. And a step of forming a laminated body, the method for manufacturing the laminated body heat exchanger.

Further, a first flow path element in which a plurality of openings are provided in a plate-like member formed of a heat conductive material and a plate-like member formed of a heat conductive material in the first flow path element are provided. A second flow path element having the same number of openings as the openings, and the openings of the first flow path element and the second flow path element constitute the same number of through flow paths as the openings. In addition, a laminate heat exchanger characterized by being alternately laminated so that a plurality of convex portions are formed in the flow path, and a plurality of openings in a plate member formed of a heat conductive material. A step of manufacturing the first flow path element and the second flow path element provided with, and the openings of the first flow path element and the second flow path element manufactured by this step are While configuring the same number of through channels as the openings,
A step of alternately stacking both flow path elements so that a plurality of convex portions are formed in the flow path, and outer surfaces of the first flow path element and the second flow path element stacked by this step Or a step of integrally joining the joint portions of the both to form a laminated body, and a method for manufacturing the laminated body heat exchanger.

[0010]

The fin element constituting the laminate heat exchanger according to the present invention is a plate member having fins and openings formed by punching or etching. It can be manufactured.
Therefore, the manufacturing process of the fin portion constituting the heat exchanger can be extremely simplified, and the size and shape of the fin portion can be freely set. Further, the stacking pattern when stacking the fin elements at a predetermined interval with a spacer or the like can be variously modified in consideration of the configuration of the entire heat exchanger.

In the laminate heat exchanger constructed by laminating the fin elements and the like described above, since the fin portion and the refrigerant flow passage are integrally molded from a single member,
Since there is no joint between the two, it is possible to eliminate the decrease in heat exchange efficiency due to the effect of contact thermal resistance at the joint between the fin portion of the heat exchanger and the refrigerant flow path, which has been a problem from the past. Become. Further, since the fin portion of the laminated body heat exchanger can have a pin fin structure, the heat transfer characteristics can be further improved by effectively exhibiting the fin leading edge effect. Furthermore, it is also possible to construct a heat exchanger having parallel flow type, counter flow type or cross flow type flow path types according to the respective applications.

According to the laminated heat exchanger and the manufacturing method thereof, which are constituted by alternately laminating two kinds of fin elements having different fin portions, without interposing a spacer or the like, the laminated heat exchanger is manufactured. The process can be further simplified and the manufacturing cost can be reduced.

According to the laminated heat exchanger constituted by alternately laminating at least two kinds of flow path elements having a plurality of openings and the manufacturing method thereof, the manufacturing process of the laminated heat exchanger is further simplified. It is possible to reduce the manufacturing cost, and by using a plurality of convex portions corresponding to the heat transfer fins formed inside the through flow passage of the laminated body heat exchanger, between the both flow passages. It is possible to improve the heat exchange efficiency of.

[0014]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic view of fin elements and the like constituting a laminated body heat exchanger according to the present invention. Here, FIG. 1A is a fin element 1, FIG. 1B is a spacer 2,
(C) has shown the lid part 3, respectively.

The fin element 1 comprises a plurality of slits 4 formed in parallel on a thin plate made of a good heat conducting material such as copper or aluminum, and a pin fin portion 5 constituted by a portion remaining between the slits 4. Have. Further, rectangular holes 6 for forming a refrigerant flow path are provided at both ends of the pin fin portion 5 in the longitudinal direction (vertical direction in the drawing).

The spacer 2 is also made of a thin plate made of a good heat conductive material such as copper or aluminum, and is provided with only a rectangular hole 7 corresponding to the rectangular hole 6 for forming the refrigerant passage of the fin element 1 described above. There is.

The slit 5 and the rectangular holes 6 and 7 described above are
Since it is formed on a thin plate by punching or etching, it can be easily manufactured in any size and pattern. Therefore, the manufacturing process of the fin portion constituting the heat exchanger can be extremely simplified, and the size and shape of the fin portion can be freely set. Details of the portions 8 and 9 and the lid portion 3 surrounded by circles in the figure will be described later with reference to FIG.

FIG. 2 shows an outline of stacking the fin elements 1 described above via the spacers 2. Figure 2
As shown in (a), the fin elements 1 and the spacers 2 are alternately laminated so that the spacers 2 are sandwiched between the fin elements 1. At this time, the rectangular hole 6 of the fin element 1 and the rectangular hole 7 of the spacer 2 are aligned with each other, and after the predetermined number of layers are stacked, the rectangular holes 6 and 7 form a continuous through flow path. .

Fin element 1 and spacer 2 stacked
Are joined at their peripheral surfaces or at the contact portions of the two to form a laminated body heat exchanger. These joints can be easily achieved by pressure bonding, diffusion joining, soldering, silver brazing, or an adhesive. In the case of the peripheral surface bonding, fusion bonding using a laser, an electron beam or the like can be performed.

Further, as shown in FIG. 2B, the fin elements 1 may be directly laminated instead of the spacers 2 by sliding so that the pin fin portions 5 do not overlap each other. By laminating in this way, a laminated body heat exchanger having two stages of pin fin portions 5 can be configured. As described above, the lamination pattern of the fin elements 1 and the spacers 2 can be variously modified in consideration of the configuration of the entire heat exchanger.

FIG. 3 shows a first embodiment of a laminated heat exchanger according to the present invention, which is constructed by laminating the fin elements 1 and the spacers 2 by the above method. As shown in the figure, the laminated body heat exchanger 10 according to the present embodiment includes a fin portion 11 having a pin fin structure and a coolant passage 12. In this embodiment, the coolant flow passage 12 is provided in parallel with the stacking direction of the fin elements 1 and the like.

Since the fin portion 11 and the coolant passage 12 are integrally formed from a single member, there is no joint portion between them. Therefore, it is possible to eliminate the decrease in heat exchange efficiency due to the influence of the contact thermal resistance at the joint between the fin portion 11 and the refrigerant flow path 12, which has been a problem in the past.

Further, the fin portion 11 of the laminated body heat exchanger 10
Can have a pin fin structure, so that the heat transfer characteristics can be further improved by effectively exhibiting the fin leading edge effect.

Further, with respect to the flow direction of the coolant in the coolant flow path 12 (the direction of the black arrow 13 in the figure), the flow direction of the fluid flowing through the fin portion 11 is represented by the white arrows 14 and 1 in the figure.
It is possible to construct a heat exchanger having a parallel flow type, a counter flow type or a cross flow type flow path type according to each application by setting it to either 5 or 16.

FIG. 4 shows a modified example of the first embodiment of the laminated body heat exchanger according to the present invention. In this modified example, similarly to the one shown in FIG. 3, after the fin elements 1 and the spacers 2 described above are alternately laminated, the portion forming the inlet and outlet of the cooling flow passage 12 in FIG. 1 (a) and 1 (b) while sealing with the lid portion 3 shown in FIG.
In, the cooling passages 17 are formed in a direction perpendicular to the stacking direction of the fin elements 1 and the like by removing the circled portions 8 and 9 of the fin elements 1 and the spacers 2.

Also in the present modification, as in the case of the embodiment shown in FIG. 3, the fin portion 11 is oriented with respect to the flow direction of the refrigerant in the refrigerant passage 12 (the direction of the black arrow 13 in the drawing).
The flow direction of the fluid flowing through is indicated by the white arrows 14, 15,
By setting it to any one of 16, it is possible to construct a heat exchanger having a parallel flow type, a counter flow type, or a cross flow type flow path type according to each application.

FIG. 5 shows another pattern of fin elements constituting the laminated body heat exchanger according to the embodiment of the present invention, and a fin element laminating method at the time of constituting a laminated body heat exchanger using the fin element. It is shown.

As shown in FIG. 5A, the fin element 21
Like the fin element 1 shown in FIG. 1, is composed of a plurality of slits 22 formed in parallel on a thin plate made of a good heat conductive material such as copper or aluminum, and a portion remaining between the slits 22. And a pin fin portion 23. Here, the pattern of the fin element 21 has a shape in which, in the fin element 1 shown in FIG. 1A, the portion forming the slit 4 and the portion forming the pin fin portion 5 are arranged in reverse. Have. In addition, at both ends of the pin fin portion 23 in the longitudinal direction, rectangular holes 2 for forming a refrigerant flow path are formed.
4 are provided.

Here, when the shape of both fin elements 1 and 21 is set so that the width of the pin fin portion 23 of the fin element 21 is smaller than the width of the slit 4 of the fin element 1, it is shown in FIG. 5 (b). As described above, even in the laminated body heat exchanger configured by laminating the fin element 21 and the fin element 1 without a spacer or the like, the flow path of the fin portion can be secured. As a result, according to the stacking method described above, the heat exchanger can be configured by simply stacking two types of fin elements alternately, the manufacturing process thereof can be further simplified, and the manufacturing cost can be reduced. It is possible to plan.

The joining method when the fin elements are laminated to form the laminated body heat exchanger, and the overall constitution of the laminated body heat exchanger are the same as those in FIGS. 2 to 4 described above.

In the laminated heat exchanger as described above, the shape and arrangement pattern of the fin portion can be variously changed by appropriately changing the pattern of the fin element. For example, the arrangement pattern of the pin fins forming the fin portion 26 of the laminated body heat exchanger 25 is a staggered arrangement shown in FIG.
By stacking the fin elements in the stepwise arrangement as shown in (b), the fluid of the stacked body heat exchanger 25 is made to collide with the pin fins located on the downstream side in the fluid flow direction. It is also possible to further improve the thermal characteristics. 7A and 7B show a second embodiment of the laminated body heat exchanger according to the present invention. FIG. 7A is a front view thereof, and FIG. 7B is a sectional view taken along the line AA. ing.

In this embodiment, the laminate heat exchanger 27 is constructed by alternately laminating two kinds of flow path elements 30, 31 having rectangular holes 28, 29 for forming two through flow paths. To do. Here, the rectangular holes 28 and 29 provided in the flow path elements 30 and 31, respectively, have the same shape, and as shown by the solid line part and partly broken line part in FIG. It is provided at a position that is vertically shifted. By alternately stacking such flow path elements 30 and 31, through flow paths 32 and 33 having a cross-sectional shape as shown in FIG. 7B are formed, and a fluid flowing in both through flow paths. Heat exchange takes place between them. As shown in the figure, a plurality of convex portions 34 corresponding to the heat transfer fins are formed inside the through passages 32 and 33, whereby the heat exchange efficiency between both through passages can be improved. It will be possible. The joining method when stacking the flow path elements 30 and 31 to form a heat exchanger, the flow direction of the fluid flowing in the through flow path, and the like are the same as those shown in FIGS. 2 to 4 described above. It is the same.

FIG. 8 shows a modification of the second embodiment of the laminate heat exchanger according to the present invention shown in FIG. Note that the same portions as those shown in FIG. 7 or portions having the same function are denoted by the same reference numerals, and the duplicated description will be omitted.

In this modification, the same effect as that shown in FIG. 7 is obtained by changing the shapes of the rectangular holes 28 and 29 for forming the two through flow paths by the flow path elements 30 and 31, respectively. It was an attempt.

Also in the second embodiment of the laminate heat exchanger according to the present invention described above, the rectangular holes 28 and 29 provided on the flow path elements 30 and 31 are formed on a thin plate by punching or etching. So any size,
It is possible to easily fabricate even patterns. Further, since there is no contact portion between the two through-flow passages 32 and 33, it is possible to construct a heat exchanger that prevents a decrease in heat exchange efficiency due to the effect of contact thermal resistance. Furthermore, in the present embodiment, the heat exchanger can be configured only by alternately stacking at least two types of flow path elements, so that the manufacturing process thereof can be further simplified and the manufacturing cost can be reduced. It will be possible. In this example,
Although the laminate heat exchanger that constitutes the two through-flow passages has been described, the present invention is not limited to this case, and a flow passage provided with a plurality of openings so that a plurality of through-flow passages are formed. It is also applicable to a laminated heat exchanger formed by stacking elements.

[0037]

As described above, according to the present invention,
The manufacturing process of the fin portion constituting the heat exchanger can be extremely simplified, the size and shape of the fin portion can be freely set, and the stacking pattern for stacking the fin elements can be set to the heat exchanger. It is possible to provide a laminate heat exchanger that can be variously modified and a method for manufacturing the same in consideration of the overall configuration.

Further, since the fin portion and the coolant passage or the plurality of through passages are integrally formed from a single member, the heat exchanger efficiency is lowered due to the influence of contact thermal resistance, which has been a problem in the prior art. It is possible to provide a laminate heat exchanger that can be eliminated.

Furthermore, the manufacturing process can be further simplified and the manufacturing process can be further simplified by providing the manufacturing method in which the laminated body heat exchange can be constituted only by alternately stacking at least two kinds of fin elements without interposing the spacers or the like. It is possible to reduce the cost.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a fin element, a spacer, and a lid portion that constitute a laminated body heat exchanger according to the present invention.

FIG. 2 is a schematic view of stacking fin elements via spacers.

FIG. 3 is a diagram showing a first embodiment of a laminated body heat exchanger according to the present invention.

FIG. 4 is a view showing a modified example of the first embodiment of the laminated body heat exchanger according to the present invention.

FIG. 5 is a diagram showing another pattern of fin elements constituting the laminate heat exchanger according to the present invention, and a fin element stacking method when constructing a laminate heat exchanger using the fin pattern.

FIG. 6 is a diagram showing an arrangement pattern of pin fins constituting a fin portion of the laminated body heat exchanger according to the embodiment of the present invention.

FIG. 7 is a diagram showing a second embodiment of the laminated body heat exchanger according to the present invention.

FIG. 8 is a diagram showing a modified example of the second embodiment of the laminated body heat exchanger according to the present invention.

FIG. 9 is a diagram showing an outline of a conventional heat exchanger.

[Explanation of symbols]

 1,21 Fin element 2 Spacer 3 Lid part 4,22 Slit 5,23 Pin fin part 6,7,24,28,29 Rectangular hole 10,27 Laminated heat exchanger 11,18 Fin part 12,17 Refrigerant flow path 30 , 31 Channel element

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tomiya Sasaki 1 Komukai Toshiba-cho, Sachi-ku, Kawasaki-shi, Kanagawa Inside Toshiba Research Institute Co., Ltd. (72) Hideo Iwasaki Toshiba, Komukai-shi, Kawasaki-shi, Kanagawa No. 1 in the city, Toshiba Research Institute, Inc. (72) Inventor Koichiro Kawano No. 1 in Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Inside the Toshiba Research Institute, Inc.

Claims (7)

[Claims] 1. A plurality of fin elements, each having a fin portion and an opening portion provided in a plate-shaped member formed of a heat conductive material, are stacked through a spacer element so that the opening portion forms a continuous flow passage. A laminated body heat exchanger comprising: 2. The laminate heat exchanger according to claim 1, wherein the fin portion is formed by forming a plurality of slits in the plate member. 3. The laminated body heat exchanger according to claim 1, wherein the fin portion is substantially composed of a plurality of pin-shaped fins. 4. A first fin element and a second fin element in which a fin portion and an opening are provided in a plate-shaped member formed of a heat conductive material, the first fin element and the second fin element. Along with the opening of the continuous flow path,
A laminated body heat exchanger, characterized in that both fin elements are alternately laminated so that both fin portions are not in contact with each other. 5. A step of manufacturing the first fin element and the second fin element, and a continuous penetration of the openings of the first fin element and the second fin element manufactured by this step. A step of alternately stacking both fin elements so that both fin portions are in a non-contact state while forming a flow path, and the first fin element and the second fin stacked in this step And a step of integrally joining the outer surfaces of the elements or the joining portions of the two to form a laminate, the method for producing a laminate heat exchanger. 6. A first flow path element having a plurality of openings formed in a plate-shaped member formed of a heat conductive material, and a first flow path element of the first flow path element formed in a plate-shaped member formed of a heat conductive material. A second flow path element having the same number of openings as the openings, and the openings of the first flow path element and the second flow path element constitute the same number of through flow paths as the openings. At the same time, the laminated body heat exchanger is characterized by being alternately laminated so that a plurality of convex portions are formed in the through flow passage. 7. A step of manufacturing the first flow path element and the second flow path element in which a plurality of openings are provided in a plate-shaped member formed of a heat conductive material, and a step of manufacturing by this step. The openings of the first flow path element and the second flow path element constitute the same number of through flow paths as the openings, and both flow paths are formed so that a plurality of convex portions are formed in the flow path. A step of alternately laminating the channel elements and an outer surface of the first channel element and the second channel element laminated by this step, or a joint portion of the both are integrally joined to form a laminated body. The manufacturing method of the laminated body heat exchanger characterized by including the process.