CN212673919U - Micro-channel heat exchanger - Google Patents
Micro-channel heat exchanger Download PDFInfo
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- CN212673919U CN212673919U CN202021719994.XU CN202021719994U CN212673919U CN 212673919 U CN212673919 U CN 212673919U CN 202021719994 U CN202021719994 U CN 202021719994U CN 212673919 U CN212673919 U CN 212673919U
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Abstract
The utility model provides a microchannel heat exchanger belongs to heat transfer technical field. The microchannel heat exchanger includes: the heat exchanger comprises a plurality of clapboards arranged in parallel at intervals, a group of heat exchange channels are arranged between every two adjacent clapboards, each group of heat exchange channels comprises a plurality of first spoilers arranged between every two adjacent clapboards along a first direction in an extending and interval mode, two adjacent first spoilers in each group of heat exchange channels respectively surround the clapboards to form a flow channel, and two adjacent groups of heat exchange channels are respectively used for circulating a cold source and a heat source. This application can effectively improve the heat exchange efficiency of heat exchanger.
Description
Technical Field
The utility model relates to a heat transfer technical field particularly, relates to a microchannel heat exchanger.
Background
The microchannel heat exchanger is a brand new heat exchange structure different from the traditional shell-and-tube heat exchanger, has the characteristics of large heat exchange area per unit volume, high heat exchange efficiency (up to 98%), pressure reduction and the like, has obvious advantages in the capabilities of bearing pressure, resisting temperature and the like (high temperature resistance of 700 ℃ and high temperature resistance of 100MPa), and has wide application prospects in the fields of nuclear power, thermal power, offshore oil and gas exploitation, chemical reactions, industrial gas treatment and the like.
The existing microchannel heat exchanger has the structural forms of a finned microchannel heat exchanger, an etched microchannel heat exchanger and a finned/etched composite microchannel heat exchanger, the heat exchangers are often provided with turbulent flow structures only in the direction parallel to the flow direction of fluid, the degree of turbulence caused by the turbulent flow is limited, and therefore the heat exchange efficiency is limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a microchannel heat exchanger can effectively improve the heat exchange efficiency of heat exchanger.
The embodiment of the utility model is realized like this:
the embodiment of the utility model provides a microchannel heat exchanger, include: the heat exchanger comprises a plurality of clapboards arranged in parallel at intervals, wherein a group of heat exchange channels are arranged between every two adjacent clapboards, each group of heat exchange channels comprises a plurality of first spoilers arranged at intervals along a first direction, the two adjacent first spoilers in each group of heat exchange channels surround the clapboards to form a flow channel, the extending directions of the two adjacent layers of heat exchange channels are mutually perpendicular, and the two adjacent layers of heat exchange channels are respectively used for circulating a cold source and a heat source.
Optionally, the group of heat exchange channels further includes a plurality of second spoilers extending along the first direction between two adjacent partition plates, and the first spoilers and the second spoilers are sequentially and alternately connected.
Optionally, the partition plate, the first spoiler and the second spoiler are all made of carbon fiber reinforced metal matrix composite materials.
Optionally, the matrix of the metal matrix composite is any one of an aluminum alloy, an aluminum magnesium alloy, a titanium alloy, and a superalloy.
Optionally, the first spoiler and the second spoiler connected to each other are arranged at a preset included angle.
Optionally, the predetermined included angle between the first spoiler and the second spoiler connected to each other is in the range of 10 ° to 170 °.
Optionally, the first spoiler, the second spoiler and the partition plate enclose to form a spoiler having a flow channel, and the cross section of the flow channel is rectangular, triangular or trapezoidal.
Optionally, each group of heat exchange channels is distributed between two adjacent partition plates, and the first spoiler and the second spoiler forming one group of heat exchange channels are welded and fixed with the partition plates.
Optionally, the first spoiler and/or the second spoiler is a flat plate.
Optionally, the surface of the first spoiler and/or the second spoiler is wavy.
Optionally, the distance between the peaks and troughs of the undulations is between 0.02 mm and 2 mm.
Optionally, the spacing between adjacent peaks is between 0.1 and 10 mm.
The utility model discloses beneficial effect includes:
the embodiment of the utility model provides a pair of microchannel heat exchanger, a plurality of baffles through parallel interval setting are provided with a set of heat transfer passageway between two adjacent baffles, and a set of heat transfer passageway includes and extends a plurality of first spoilers that the interval set up along the first direction between two adjacent baffles, and two adjacent first spoilers in a set of heat transfer passageway enclose with the baffle respectively and close and form a runner. The extending directions of the two adjacent groups of heat exchange channels are mutually perpendicular, and the two adjacent groups of heat exchange channels are respectively used for circulating a cold source and a heat source, so that the heat exchange efficiency of the micro-channel heat exchanger is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a microchannel heat exchanger according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a flow passage according to an embodiment of the present invention;
fig. 3 is a second schematic cross-sectional view of a flow channel according to an embodiment of the present invention;
fig. 4 is a third schematic cross-sectional view of a flow passage according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating a first spoiler as a flat plate according to an embodiment of the present invention;
fig. 6 is a schematic view illustrating a first spoiler according to an embodiment of the present invention in a wave shape;
fig. 7 is a schematic view illustrating a first spoiler according to an embodiment of the present invention in a zigzag shape.
Icon: 100-microchannel heat exchangers; 110-a separator; 120-heat exchange channels; 121-a first spoiler; 122-a second spoiler; 123-flow channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: the terms "central," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the description and are used in a generic and descriptive sense only and not for purposes of limitation, the term "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like. The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "disposed," "mounted," "connected," and "coupled" are to be construed broadly and may include, for example, a fixed connection, an integral connection, or a communication between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The existing microchannel heat exchanger has the structural forms of a finned microchannel heat exchanger, an etched microchannel heat exchanger and a finned/etched composite microchannel heat exchanger, the heat exchangers are often provided with turbulent flow structures only in the direction parallel to the flow direction of fluid, the degree of turbulence caused by the turbulent flow is limited, and therefore the heat exchange efficiency is limited. The present application has been made in view of the above-described deficiencies in the prior art, and the following is a description of embodiments of the present application.
Fig. 1 is a schematic structural view of a microchannel heat exchanger 100 provided by the present invention, please refer to fig. 1, an embodiment of the present invention provides a microchannel heat exchanger 100, including: the heat exchanger comprises a plurality of partition plates 110 arranged in parallel at intervals, a group of heat exchange channels 120 are arranged between two adjacent partition plates 110, each group of heat exchange channels 120 comprises a plurality of first spoilers 121 arranged between two adjacent partition plates 110 in an extending and interval mode along a first direction, two adjacent first spoilers 121 in one group of heat exchange channels 120 respectively surround the partition plates 110 to form a flow channel 123, the extending directions of two adjacent groups of heat exchange channels 120 are mutually perpendicular, and two adjacent groups of heat exchange channels 120 are respectively used for circulating a cold source and a heat source.
The first direction mentioned above refers to a direction perpendicular to a flowing direction of the heat source or the cold source, that is, a direction perpendicular to an extending direction of the heat exchanging channel 120.
The height of the partition 110 is in the range of 1-10mm, and the length and width of the partition 110 are in the range of 10-1000mm, so that the microchannel heat exchanger 100 formed by the plurality of partitions 110 has more specifications and is more practical.
The partition plate 110, the first spoiler 121 and the second spoiler 122 are made of carbon fiber reinforced metal matrix composite materials, metal powder and carbon fibers are sintered and formed into a metal laminate by vacuum hot pressing, wherein the metal matrix can be aluminum alloy, aluminum-magnesium alloy, titanium alloy, high-temperature alloy and the like, so that the strength and the heat conduction performance of the metal laminate can be effectively improved, and the microchannel heat exchanger can obtain higher heat exchange performance and pressure resistance.
A group of heat exchange channels 120 is arranged between two adjacent partition plates 110, the heat exchange channels 120 of adjacent groups are respectively introduced with a heat source and a cold source, the more the partition plates 110 are arranged, the more the groups of heat exchange channels 120 are, and the higher the heat exchange efficiency of the microchannel heat exchanger 100 is.
For example, four partition plates 110 are provided, a cold source is introduced into a group of heat exchange channels 120 formed between the first partition plate 110 and the second partition plate 110, a heat source is introduced into a group of heat exchange channels 120 formed between the second partition plate 110 and the third partition plate 110, a cold source is introduced into a group of heat exchange channels 120 formed between the third partition plate 110 and the fourth partition plate 110, and the flow directions of the heat source or the cold source in two adjacent groups of heat exchange channels 120 are perpendicular to each other, so that the heat exchange effect of the microchannel heat exchanger 100 is effectively improved.
The number of the partition plates 110 is not particularly limited, and a person skilled in the art can correspondingly design a certain number of the partition plates 110 according to actual conditions to achieve the heat exchange effect to be achieved by the microchannel heat exchanger 100.
The group of heat exchange channels 120 includes a plurality of first spoilers 121 arranged at intervals, the more the first spoilers 121 are arranged, the more the flow channels 123 formed by enclosing every two adjacent first spoilers 121 and two partition plates 110 are, the better the heat exchange effect is.
The cross-section of one flow channel 123 formed by two adjacent first spoilers 121 and the partition 110 in one set of heat exchange channels 120 can be various, such as square, rectangle, parallelogram, trapezoid, etc., which are given as examples only and are not intended to limit the cross-section of the flow channel 123.
Referring to fig. 1 and 2, a cross section of a flow channel 123 enclosed by two adjacent first spoilers 121 and the partition 110 in a group of heat exchange channels 120 is rectangular.
Referring to fig. 1 and 3, a cross section of a flow channel 123 enclosed by two adjacent first spoilers 121 and the partition 110 in a group of heat exchange channels 120 is a parallelogram.
In order to facilitate the inlet and outlet arrangement of the cold and hot fluids, in this embodiment, the extending directions of the two adjacent sets of heat exchanging channels 120 are set to be perpendicular to each other, that is, the included angle between the extending directions of the two adjacent sets of heat exchanging channels 120 is 90 °. When the heat source and the cold source respectively pass through the adjacent heat exchange channels 120, the flow directions of the heat source and the cold source are perpendicular to each other, so that the heat exchange effect of the microchannel heat exchanger 100 can be effectively improved.
The embodiment of the utility model provides a pair of microchannel heat exchanger 100, through a plurality of baffles 110 that parallel interval set up, be provided with a set of heat transfer passageway 120 between two adjacent baffles 110, a set of heat transfer passageway 120 includes a plurality of first spoilers 121 that extend the setting along the first direction between two adjacent baffles 110, and two adjacent first spoilers 121 in a set of heat transfer passageway 120 enclose with baffle 110 respectively and close and form a runner 123. The extending directions of the two adjacent sets of heat exchanging channels 120 are perpendicular to each other, and the two adjacent sets of heat exchanging channels 120 are respectively used for circulating a cold source and a heat source, so that the heat exchanging efficiency of the microchannel heat exchanger 100 is effectively improved.
Optionally, in this embodiment, the group of heat exchange channels 120 further includes a plurality of second spoilers 122 extending in the first direction between two adjacent partitions 110, and the first spoilers 121 and the second spoilers 122 are sequentially and alternately connected.
The first spoilers 121 and the second spoilers 122 of the heat exchange channels 120 are alternately connected in sequence, and the cross-section of the flow channel 123 enclosed by the baffles is various, such as rectangular, square, trapezoidal, triangular, etc. Specifically, the first spoiler 121 is perpendicular to the second spoiler 122, and the first spoiler 121 and the second spoiler 122 are connected end to form a set of heat exchange channels 120 as shown in fig. 4. Alternatively, one side of the first spoiler 121 is connected to both sides of the second spoiler 122, respectively, and the other side of the first spoiler 121 is fixedly connected to the partition plate to form the flow channel 123.
The more the first spoilers 121 and the second spoilers 122 are arranged in the group of heat exchange channels 120, the more the flow channels 123 are formed in the group of heat exchange channels 120, and the heat exchange effect of the microchannel heat exchanger 100 is effectively improved.
Optionally, in this embodiment, the first spoiler 121 and the second spoiler 122 connected to each other are disposed at a predetermined included angle.
It should be noted that, the included angle between the first spoiler 121 and the second spoiler 122 connected to each other is not limited herein, as long as the first spoiler 121 and the second spoiler 122 connected to each other in the group of heat exchange channels 120 are respectively enclosed with the partition 110 to form the flow channel 123, so that the heat source or the cold source can flow through the flow channel 123.
Illustratively, the included angle between the first spoiler 121 and the second spoiler 122 is 90 °, please refer to fig. 4, wherein the second spoiler 122 and one first spoiler 121 are sequentially and vertically connected.
The above is only an example and is not to be understood as a limitation of the angle between the first spoiler 121 and the second spoiler 122.
Alternatively, in the present embodiment, the predetermined included angle between the first spoiler 121 and the second spoiler 122 connected to each other is in the range of 10 ° to 170 °.
In this embodiment, the preset included angle between the first spoiler 121 and the second spoiler 122 is within a range of 10 ° to 170 °, as long as the preset included angle between the first spoiler 121 and the second spoiler 122 is within a range of 10 ° to 170 °, the first spoiler 121 and the second spoiler 122 connected in sequence and alternately can disturb the fluid in the heat exchange pipe, thereby effectively improving the heat exchange effect. As to the specific preset included angle between the first spoiler 121 and the second spoiler 122, the heat exchange effect of the microchannel heat exchanger 100 is the best, and a person skilled in the art should select a suitable value according to the actual heat exchange condition, because the preset included angle between the first spoiler 121 and the second spoiler 122 has different values, the applicable turbulence degree is different.
Optionally, the first spoiler 121, the second spoiler 122 and the partition 110 enclose a spoiler having a flow channel 123, and the flow channel 123 has a rectangular, triangular or trapezoidal cross section.
As can be seen from the above description, the predetermined included angle between the first spoiler 121 and the second spoiler 122 is in the range of 10 ° to 170 °, so that the first spoiler 121 and the second spoiler 122, which are sequentially and alternately connected in the group of heat exchange channels 120, and the partition plate 110 enclose to form the spoiler with different cross sections, that is, the cross section of one flow channel 123 is different.
Referring to fig. 4, when a cross section of one flow channel 123 is rectangular, the spoiler includes two first spoilers 121 and one second spoiler 122 sequentially and alternately connected in one group of heat exchange channels 120 and the partition plate 110 are enclosed to form, or the spoiler includes two second spoilers 122 and one first spoiler 121 and the partition plate 110 sequentially and alternately connected in one group of heat exchange channels 120 and the partition plate 110 is enclosed to form, a cross section of the spoiler is also rectangular, and at this time, a preset included angle between the first spoilers 121 and the second spoilers 122 sequentially and alternately connected is 90 °.
When the cross section of a flow channel 123 is triangular, a flow channel 123 is defined by a first spoiler 121 and a second spoiler 122 connected to each other and the partition 110, and the predetermined included angle between the first spoiler 121 and the second spoiler 122 connected to each other ranges from 10 ° to 170 °, the predetermined included angle has different values, and the types of triangles are different, for example, when the predetermined included angle is greater than 90 °, the formed triangle is an obtuse triangle, when the predetermined included angle is equal to 90 °, the formed triangle is a right-angled triangle, and when the predetermined included angle is equal to 60 °, the formed triangle may be an equilateral triangle.
When a cross section of one flow channel 123 is a trapezoid, the enclosing to form one flow channel 123 includes two first spoilers 121 and one second spoiler 122, which are sequentially and alternately connected, and the partition 110, and the trapezoid includes various shapes, such as a right trapezoid, an isosceles trapezoid, an irregular trapezoid, and the like, which are not limited herein.
Alternatively, in this embodiment, each group of heat exchanging channels 120 is distributed between two adjacent partition plates 110, and the first spoiler 121 and the second spoiler 122 forming one group of heat exchanging channels 120 are welded to the partition plates 110.
The first spoilers 121 and the second spoilers 122 connected in sequence and alternately are respectively fixedly connected with the partition plate 110, and this embodiment shows that the first spoilers 121 and the second spoilers 122 connected in sequence and alternately are respectively fixedly welded with the partition plate 110, and the welding form is not limited herein, for example, the welding form may be brazing or diffusion welding, and those skilled in the art should understand.
Fig. 5 is a schematic view illustrating the first spoiler 121 according to an embodiment of the present invention being a flat plate, please refer to fig. 5, and optionally, the first spoiler 121 and/or the second spoiler 122 are/is a flat plate.
The shape and size of the first spoiler 121 and/or the second spoiler 122 are not particularly limited, as long as one set of the heat exchange channels 120 can be adapted to different degrees of heat exchange conditions.
When the first spoiler 121 and/or the second spoiler 122 are flat plates, the manufacturing cost of the microchannel heat exchanger 100 can be effectively reduced.
Fig. 6 is a schematic view illustrating that the first spoiler 121 according to an embodiment of the present invention is in a wave shape, please refer to fig. 6, and optionally, the plate surface of the first spoiler 121 and/or the second spoiler 122 is in a wave shape.
When the wave-shaped plate of the first spoiler 121 and/or the second spoiler 122 is wave-shaped, the wave crests and wave troughs can change the boundary of the fluid, increase the turbulence degree of the fluid, and thus effectively improve the heat exchange effect.
Fig. 7 is a schematic view illustrating that the first spoiler 121 is serrated, please refer to fig. 7, and optionally, the surfaces of the first spoiler 121 and/or the second spoiler 122 are serrated respectively.
When the wavy plate surface of the first spoiler 121 and/or the second spoiler 122 has the zigzag shape, the zigzag tooth tops and tooth bottoms can change the boundary of the fluid because the corners at the zigzag tooth tops and tooth bottoms are relatively sharp, and thus, when the wavy plate surface of the first spoiler 121 and/or the second spoiler 122 has the zigzag shape, the heat exchange with a high degree of turbulence can be performed.
Optionally, in this embodiment, the distance between the wave crest and the wave trough is 0.02-2 mm.
Since the heat exchanger is the microchannel heat exchanger 100, the distance between the peaks and the valleys in the undulations cannot be too large, which would otherwise significantly increase the pressure drop of the microchannel heat exchanger 100, whereas the distance between the peaks and the valleys in the undulations cannot be too small, which would not significantly increase the heat exchange efficiency of the microchannel heat exchanger 100, and therefore, in view of the above situation, the distance between the peaks and the valleys in the undulations in the present embodiment ranges from 0.01 mm to 1 mm.
Optionally, the spacing between adjacent peaks in this embodiment is between 0.1 mm and 10 mm.
From the above, when the plate surfaces of the first spoiler 121 and/or the second spoiler 122 are respectively in the wave shape, the distance range between the wave-shaped peaks and the wave troughs is 0.02 to 2mm, and the distance between the adjacent peaks is 0.1 to 10mm, the increase of the pressure drop of the microchannel heat exchanger 100 can be accepted within the acceptable range, and the heat exchange effect is also better.
In general, the length and width of the microchannel heat exchanger 100 range from 10 to 1000mm, and the number of the partitions 110 ranges from 1 to 100, and in view of the above, the width of the first spoiler 121 and the second spoiler 122 in the present embodiment ranges from 1 to 10 mm.
As can be seen from the above, when the width ranges of the first spoilers 121 and the second spoilers 122 are 1-10mm, the heat exchange effect of the micro-channel heat exchanger 100 can be ensured without affecting the flow disturbing effect of the heat source and the cold source in the heat exchange channel 120, and therefore, in order to further ensure the heat exchange effect, the distance between the two first spoilers 121 is set to be 10-500 mm.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A microchannel heat exchanger, comprising: the heat exchanger comprises a plurality of clapboards which are arranged in parallel at intervals, a group of heat exchange channels are arranged between every two adjacent clapboards, the heat exchange channels comprise a plurality of first spoilers which are arranged between every two adjacent clapboards along a first direction in an extending and interval mode, every two adjacent first spoilers in the heat exchange channels form a flow channel in a surrounding mode with the clapboards, the extending directions of every two adjacent heat exchange channels are perpendicular to each other, and every two adjacent heat exchange channels are used for circulating a cold source and a heat source.
2. The microchannel heat exchanger of claim 1, wherein a group of the heat exchange channels further comprises a plurality of second spoilers extending in the first direction between two adjacent partitions, the first spoilers and the second spoilers being connected in series and alternately.
3. The microchannel heat exchanger of claim 2, wherein the first and second baffles are connected at a predetermined included angle.
4. The microchannel heat exchanger of claim 3, wherein the predetermined included angle between the first and second interconnected spoilers is in the range of 10 ° to 170 °.
5. The microchannel heat exchanger of claim 2, wherein the first spoiler, the second spoiler, and the partition plate enclose a spoiler member having one flow channel, the flow channel having a cross-section of a rectangular, triangular, or trapezoidal shape.
6. The microchannel heat exchanger of claim 2, wherein each of the heat exchange channels is disposed between two adjacent partition plates, and the first and second spoilers forming one of the heat exchange channels are welded to the partition plates.
7. The microchannel heat exchanger of claim 2, wherein the first and/or second baffles are flat plates.
8. The microchannel heat exchanger of claim 2, wherein the plate surface of the first spoiler and/or the second spoiler is waved.
9. The microchannel heat exchanger of claim 8, wherein the distance between the crests and troughs of the undulations is in the range of 0.02 mm to 2 mm.
10. The microchannel heat exchanger of claim 9, wherein the spacing between adjacent peaks is between 0.1 mm and 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021719994.XU CN212673919U (en) | 2020-08-17 | 2020-08-17 | Micro-channel heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021719994.XU CN212673919U (en) | 2020-08-17 | 2020-08-17 | Micro-channel heat exchanger |
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| CN212673919U true CN212673919U (en) | 2021-03-09 |
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| CN202021719994.XU Active CN212673919U (en) | 2020-08-17 | 2020-08-17 | Micro-channel heat exchanger |
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