CN110425911B - Three-medium heat exchanger - Google Patents
Three-medium heat exchanger Download PDFInfo
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- CN110425911B CN110425911B CN201910813186.5A CN201910813186A CN110425911B CN 110425911 B CN110425911 B CN 110425911B CN 201910813186 A CN201910813186 A CN 201910813186A CN 110425911 B CN110425911 B CN 110425911B
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- tube
- heat exchange
- heat
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- 238000012546 transfer Methods 0.000 claims abstract description 61
- 239000011229 interlayer Substances 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 230000004888 barrier function Effects 0.000 claims description 32
- 239000010410 layer Substances 0.000 claims description 27
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 20
- 238000010438 heat treatment Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D11/00—Heat-exchange apparatus employing moving conduits
- F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
- F28D11/04—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller performed by a tube or a bundle of tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the field of heat exchanger structural design, and provides a three-medium heat exchanger, which comprises a heat exchange tube, a first medium inlet tube and a first medium outlet tube, wherein the heat exchange tube comprises an outer tube, an inner tube, a first interlayer and a second interlayer, and two ends of the inner tube are respectively connected with the first medium inlet tube and the first medium outlet tube in a dynamic sealing manner; the first interlayer and the second interlayer divide the space between the outer tube and the inner tube into a heat insulation cavity and two heat transfer cavities, and the two heat transfer cavities are communicated with the second medium inlet and the second medium outlet. According to the three-medium heat exchanger provided by the invention, the heat exchange tube structure is specially designed, and the contact area between the medium in the two heat transfer cavity units and the inner tube or the outer tube is changed by adjusting the rotation of the heat exchange tube according to the preset direction and angle, so that the heat exchange quantity between two mediums or between three mediums is adjusted, the problem that the third medium participates in heat exchange when only two mediums exchange heat is solved, the stepless adjustment of the heat exchange quantity can be realized, the energy consumption is reduced, and the heat exchange efficiency is improved.
Description
Technical Field
The invention relates to the field of structural design of heat exchangers, in particular to a three-medium heat exchanger.
Background
With the development of economy and refrigeration/heat technology, the demand for heat exchange technology of various media (especially three media) in the same space is more and more strong, and the heat exchange technology is practically applied to various fields of multi-heat source composite heat pumps, natural cooling systems, chemical processes and the like. However, in the existing three-medium heat exchanger, only two mediums are needed to participate in heat exchange, and the third medium is often also involved in heat exchange, so that the problems of energy consumption, complex control and the like are caused.
Disclosure of Invention
First, the technical problem to be solved
The embodiment of the invention provides a three-medium heat exchanger, which aims to solve the problem that the third medium cannot be prevented from participating in heat exchange under the working condition that the existing three-medium heat exchanger only needs double-medium heat exchange.
(II) technical scheme
In order to solve the technical problems, the embodiment of the invention provides a three-medium heat exchanger, which comprises a first medium inlet pipe, a first medium outlet pipe and a heat exchange pipe, wherein the heat exchange pipe comprises an inner pipe and an outer pipe sleeved on the inner pipe, two ends of the outer pipe are respectively provided with a second medium inlet and a second medium outlet, and two ends of the inner pipe are respectively connected with the first medium inlet pipe and the first medium outlet pipe in a dynamic sealing way;
The heat exchange tube further comprises a first interlayer and a second interlayer, opposite ends of the first interlayer are respectively connected with the inner tube wall of the outer tube and extend along the length direction of the outer tube, the area between the outer tube and the inner tube is divided into a heat insulation cavity and a heat transfer cavity, and the inner tube is positioned in the heat transfer cavity;
The second interlayer is positioned in the heat transfer cavity and extends along the length direction of the outer tube, and the heat transfer cavity is divided into a first heat transfer cavity unit and a second heat transfer cavity unit by at least one second interlayer;
the first heat transfer cavity unit and the second heat transfer cavity unit are communicated with the second medium inlet and the second medium outlet.
Preferably, the three-medium heat exchanger further comprises: the device comprises a first sealed rotating shaft and a second sealed rotating shaft, wherein one end of the first sealed rotating shaft is in dynamic sealing connection with the first medium inlet pipe, and the other end of the first sealed rotating shaft is fixedly connected with the inlet end of the inner pipe;
One end of the second sealing rotating shaft is in dynamic sealing connection with the first medium outlet pipe, and the other end of the second sealing rotating shaft is fixedly connected with the outlet end of the inner pipe.
Preferably, the first medium inlet pipe and the first medium outlet pipe are parallel, the number of the heat exchange pipes is a plurality, and the plurality of the heat exchange pipes are arranged at equal intervals along the length direction of the first medium inlet pipe.
Preferably, the three-medium heat exchanger further comprises: the second medium inlet pipe is flexibly connected with the second medium inlet through a hose, and the second medium outlet pipe is flexibly connected with the second medium outlet through the hose;
the second medium inlet pipe and the first medium outlet pipe are positioned at the same end of the outer pipe, and the second medium outlet pipe and the first medium inlet pipe are positioned at the same end of the outer pipe.
Preferably, the inner tube and the outer tube are eccentrically arranged, the first interlayer is of an arc-shaped structure, and one side, close to the heat transfer cavity, of the first interlayer is in inscribed connection with the outer tube wall of the inner tube.
Preferably, the second barrier layer is connected to a position where a distance between an outer tube wall of the inner tube and an inner tube wall of the outer tube is largest, and the first barrier layer is symmetrically arranged with respect to the second barrier layer so that cross-sectional sizes of the first heat transfer chamber unit and the second heat transfer chamber unit are equal.
Preferably, a first positioning groove is formed in the inner pipe wall of the outer pipe, and the first interlayer is clamped in the first positioning groove;
the inner pipe wall of inner pipe and the corresponding position on the outer pipe wall of inner pipe all are provided with the second constant head tank, the opposite end of second interlayer card respectively establishes the outer pipe with in the second constant head tank of inner pipe.
Preferably, the three-medium heat exchanger further comprises a reinforcing rib, one side, close to the heat insulation cavity, of the first interlayer is connected with the inner pipe wall of the outer pipe through the reinforcing rib, and the reinforcing rib and the second interlayer are located in the same plane.
Preferably, a third positioning groove is formed in the inner pipe wall of the outer pipe, one end of the reinforcing rib is integrally connected with the first interlayer, and the other end of the reinforcing rib is clamped in the third positioning groove.
Preferably, the inner tube and the outer tube are made of copper tubes, aluminum tubes or stainless steel tubes;
The inner tube wall of the outer tube is provided with a smooth surface or an internal thread, and the outer tube wall of the outer tube is provided with a smooth surface, an external thread, a rib or a fin structure.
(III) beneficial effects
According to the three-medium heat exchanger provided by the embodiment of the invention, the structure of the heat exchange tube is specially designed, and the contact area between the second medium in the two heat transfer cavity units and the outer tube wall of the inner tube or the inner tube wall of the outer tube is changed by adjusting the rotation of the heat exchange tube according to the preset direction and angle, so that the heat exchange quantity between the two mediums or between the three mediums is adjusted, the problem that the third medium participates in heat exchange when only the first medium and the second medium exchange heat is solved, the stepless adjustment of the heat exchange quantity can be realized, the energy consumption is reduced, and the heat exchange efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a three-medium heat exchanger in an embodiment of the invention;
FIG. 2 is a top view of a three-medium heat exchanger in an embodiment of the invention;
FIG. 3 is a schematic view illustrating an internal structure of a heat exchange tube according to an embodiment of the present invention;
FIG. 4 is a schematic view of an installation structure of a heat exchange tube according to an embodiment of the present invention;
FIG. 5 is a graph of the change in the internal liquid level of the heat exchange tube rotating around the axial direction in an embodiment of the present invention;
In the figure: 1. a first medium inlet pipe; 2. a first medium outlet pipe; 3. a second medium inlet pipe; 4. a second medium outlet pipe; 5. a heat exchange tube; 6. a surface expansion structure; 7. a first tee structure; 8. a second tee structure; 9. a thermally insulating chamber; 10. a heat transfer chamber; 11. a highest level line; 12. a second medium; 13. a first interlayer; 14. a first medium; 15. a second barrier layer; 16. a first sealed rotating shaft; 17. a second sealed rotating shaft; 18. a fixed support; 19. a second medium inlet; 20. a second medium outlet; 21. a first positioning groove; 22. a second positioning groove; 23. reinforcing ribs; 24. a third positioning groove; 25. a hose; 101. a first heat transfer chamber unit; 102. a second heat transfer chamber unit; 501. an inner tube; 502; an outer tube.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 5, an embodiment of the present invention provides a three-medium heat exchanger, which includes a first medium inlet pipe 1, a first medium outlet pipe 2, and a heat exchange pipe 5, wherein the first medium inlet pipe 1 is arranged parallel to the first medium outlet pipe 2, and the heat exchange pipe 5 is located between the first medium inlet pipe 1 and the first medium outlet pipe 2 and is perpendicular to both the first medium inlet pipe 1 and the first medium outlet pipe 2.
In the embodiment, the heat exchange quantity control of the three-medium heat exchanger is realized by carrying out special design on the internal structure of the heat exchange tube and combining the rotation of the heat exchange tube around the axial direction of the heat exchange tube.
Specifically, the heat exchange tube 5 includes an inner tube 501 and an outer tube 502 fitted over the inner tube, and the axis of the inner tube 501 is parallel to the axis of the outer tube 502. The end of the outer tube 502 and the end of the inner tube 501 are sealed, so as to prevent the working medium in the outer tube 502 from leaking out. The length of the inner pipe 501 may be equal to the length of the outer pipe 502 or may be greater than the length of the outer pipe 502, so that the working medium inside the inner pipe is conveniently communicated with the first medium inlet pipe 1 and the first medium outlet pipe 2.
The inner tube 501 is filled with the first medium 14, the outer tube 502 is filled with the second medium 12, and the third medium is located outside the heat exchange tube 5 and in contact with the outer tube wall of the outer tube 502.
To ensure that the second medium 12 flows in the outer tube 502, both ends of the outer tube 502 are provided with a second medium inlet 19 and a second medium outlet 20, respectively. In this embodiment, in order not to affect the medium flow of the heat exchange tube 5 during rotation, the two ends of the inner tube 201 are respectively connected with the first medium inlet tube 1 and the first medium outlet tube 2 in a dynamic seal manner.
Wherein the heat exchange tube 5 further comprises a first barrier layer 13 and a second barrier layer 15, opposite ends of the first barrier layer 13 are respectively connected with the inner tube wall of the outer tube 502 and extend along the length direction of the outer tube 502, thereby dividing the region between the outer tube 502 and the inner tube 501 into the heat insulating chamber 9 and the heat transfer chamber 10.
Further, the inner tube 501 is located in the heat transfer chamber 10 so as to be in contact with the second medium 12 in the heat transfer chamber 10, and in order to achieve that the flowing second medium 12 is distributed in the first heat transfer chamber unit 101 and the second heat transfer chamber unit 102, both ends of the two heat transfer chamber units need to be respectively communicated with the second medium inlet 19 and the second medium outlet 20 in the present embodiment.
Meanwhile, a second barrier layer 15 is located within the heat transfer chamber 9 and arranged along the length direction of the outer tube 502, the second barrier layer 15 being connected between the inner tube wall of the outer tube 502 and the outer tube wall of the inner tube 501 or between the first barrier layer 13 and the outer tube wall of the inner tube 501.
The heat transfer cavity 10 is internally divided into a first heat transfer cavity unit 101 and a second heat transfer cavity unit 102 by arranging at least one second interlayer 15, and the control of participation of different media in heat exchange is realized by arranging that the contact areas of the two heat transfer cavities and the outer pipe wall of the inner pipe 501 are different and the outer pipe 502 is different in the rotation process. It should be noted that at least one of the second spacers 15 specifically means one or two, and generally, two second spacers 15 are required to be disposed in the heat insulation cavity 10 to divide the space in the heat insulation cavity 10 into two parts; in particular, if the outer wall of the inner tube 501 is bonded to the first barrier layer 13, only one second barrier layer 15 needs to be disposed between the inner tube 501 and the outer tube 502.
In this embodiment, the second barrier layer 10 and the first barrier layer 6 are both physical sealing barriers, and preferably are various materials with low thermal insulation or thermal conductivity. The heat insulation cavity 9 can be filled with vacuum or other filling materials with low heat transfer coefficient, so that the purpose of heat insulation or partial heat insulation can be achieved when the heat exchange tube is at certain angle positions, and the heat exchange quantity can be adjusted conveniently.
According to the three-medium heat exchanger provided by the embodiment, the contact area between the second medium 12 in the two heat transfer cavity units and the inner pipe 501 (the first medium 14) and the outer pipe 502 (the third medium) is changed by adjusting the rotation of the heat exchange pipe according to the preset direction and angle, so that the heat exchange quantity between the two mediums or between the three mediums is changed, the problem that the third medium participates in heat exchange when only two mediums exchange heat is solved, the stepless regulation of the heat exchange quantity can be realized, the energy consumption is reduced, the heat exchange efficiency is improved, and the rotation direction and angle can be automatically adjusted according to the heat exchange quantity requirement.
On the basis of the above embodiment, in order to realize dynamic sealing connection between the heat exchange tube 5 and the first medium inlet tube 1 and the first medium outlet tube 2, the dynamic sealing connection is realized by arranging a corresponding first sealing rotating shaft 16 and a second sealing rotating shaft 17, and the inside of the first sealing rotating shaft 16 and the inside of the second sealing rotating shaft 17 are hollow structures, which can realize autorotation and drive a shaft or a pipe connected with the autorotation through connecting a power supply to rotate.
Specifically, one end of the first sealed rotating shaft 16 is in dynamic sealing connection with the pipe wall of the first medium inlet pipe 1, and of course, a connecting pipe may be disposed on the pipe wall of the first medium inlet pipe 1, and is in dynamic sealing connection with one end of the first sealed rotating shaft 16 through the connecting pipe, and the other end of the first sealed rotating shaft 16 is fixed and in sealing connection with the inlet end of the inner pipe 501.
One end of the second sealing rotating shaft 17 is in dynamic sealing connection with the pipe wall of the first medium outlet pipe 2, and of course, a connecting pipe can be arranged on the pipe wall of the first medium outlet pipe 2 and is in dynamic sealing connection with the other end of the second sealing rotating shaft 17 through the connecting pipe, and the other end of the second sealing rotating shaft 17 is fixed with the outlet end of the inner pipe 201 and is in sealing connection.
In this embodiment, the connection manner between the two ends of the first sealing rotation shaft 16 and the second sealing rotation shaft 17 may be exchanged, that is, the two ends of the inner tube 501 are respectively connected with one end of the first sealing rotation shaft 16 and one end of the second sealing rotation shaft 17 in a dynamic sealing manner, the other end of the first sealing rotation shaft 16 is fixedly connected with the wall of the first medium inlet pipe 1, and the other end of the second sealing rotation shaft 17 is fixedly connected with the wall of the first medium outlet pipe 2.
On the basis of the above embodiments, in order to increase the heat exchange area in the three-medium heat exchanger, the heat exchange tubes 5 are provided in plurality, and the plurality of heat exchange tubes 5 are arranged at equal intervals along the length direction of the first medium inlet tube 1, since the first medium inlet tube 1 and the first medium outlet tube 2 are arranged in parallel, that is, the plurality of heat exchange tubes 5 are arranged between the first medium inlet tube 1 and the first medium outlet tube 2 in parallel with each other, and each heat exchange tube 5 is perpendicular to the first medium inlet tube 1 and the first medium outlet tube 2.
On the basis of the above embodiments, the three-medium heat exchanger further includes: the second medium inlet pipe 3 and the second medium outlet pipe 4 are flexibly connected through a hose 25, and the second medium outlet pipe 4 and the second medium outlet 20 are flexibly connected through the hose 25, so that the circulating flow of the second medium 12 is not influenced when the heat exchange pipe 5 rotates. Moreover, by setting the length of the hose 25, the rotation angle of the heat exchange tube 5 can be limited, and the length of the hose 25 in this embodiment is preferably enough to meet the requirement that the heat exchange tube rotates within a range of 180 degrees, so as to prevent the length of the hose 25 from being excessively long and winding on the heat exchange tube 5 to affect the flow effect of the second medium 12.
Meanwhile, in order to increase the heat exchange effect between the first medium 14 and the second medium 12, the second medium inlet pipe 3 and the first medium outlet pipe 2 are disposed at one end of the outer pipe 502, and the second medium outlet pipe 4 and the first medium inlet pipe 1 are disposed at the other end of the outer pipe 502.
In addition, in order to facilitate flexible connection between the plurality of heat exchange tubes 5 and the second medium inlet tube 3 and the second medium outlet tube 4 through the flexible tube 25, the first medium inlet tube 1, the second medium outlet tube 4, the second medium inlet tube 3 and the first medium outlet tube 2 are all arranged in parallel, and the second medium outlet tube 4 is fixedly connected with the first medium inlet tube 1 through the fixed support 18, and the second medium inlet tube 3 is also fixedly connected with the first medium outlet tube 2 through the fixed support 18.
In the above-described embodiment, in order to facilitate the installation and sealing of the end portions of the heat exchange tube 5, the first three-way joint 7 and the second three-way joint 8 are provided at both ends of the outer tube 502, respectively.
The inlet of the outer pipe 502 is communicated with the first port of the first three-way joint 7, the outlet is communicated with the first port of the second three-way joint 8, cover plates are respectively arranged on the second ports of the first three-way joint 7 and the second three-way joint 8 in a covering manner, two ends of the inner pipe 501 respectively penetrate through the corresponding cover plates to be in dynamic sealing connection with the first medium outlet pipe 2 and the first medium inlet pipe 1, namely, two ends of a first channel formed in the inner cavity of the inner pipe 501 are respectively in dynamic sealing communication with the first medium inlet pipe 1 and the first medium outlet pipe 2.
While the third port (corresponding to the second medium inlet 19) of the first three-way joint 7 is flexibly connected with the second medium inlet pipe 3 through the hose 25, the third port (corresponding to the second medium outlet 20) of the second three-way joint 8 is flexibly connected with the second medium outlet pipe 4 through the hose 25, that is, the outer pipe wall of the inner pipe 501 and the inner pipe wall of the outer pipe 502 enclose a heat transfer cavity 10 (comprising the first heat transfer cavity unit 101 and the second heat transfer cavity unit 102), and two ends of the heat transfer cavity 10 are respectively communicated with the second medium inlet pipe 3 and the second medium outlet pipe 4 through the flow passages formed between the inner pipe 501 and the first three-way joint 7 and the second three-way joint 8. The length of the hose 25 is preferably such that it does not interfere with the free rotation of the first and second three-way joints 7, 8 during one rotation cycle.
On the basis of the above embodiments, in order to maximize the heat exchange area of the heat pipe cavity, the inner pipe 502 and the outer pipe 501 are eccentrically arranged, that is, the axes of the two are not coincident, so that a larger space can be reserved for the first heat transfer cavity unit 101 and the second heat transfer cavity unit 102. The first interlayer 13 is of an arc structure, one side of the first interlayer 13, which is close to the heat transfer cavity 10, is inscribed with the outer pipe wall of the inner pipe 502, the tangent position between the first interlayer 13 and the outer pipe wall of the inner pipe 502 is fixedly connected through a clamping groove, a groove can be specifically formed in the outer pipe wall of the inner pipe 501 at the tangent position, a protrusion matched with the groove is arranged on the first interlayer 13, and when the inner pipe 501 is installed, the groove of the inner pipe corresponds to the protrusion on the first interlayer 13 at the end part of the heat exchange pipe and is pushed into the outer pipe 502. The inner tube position can be stabilized and the shock absorption effect can be achieved based on the self structural design and the pressure difference of the two sides of the first interlayer 13.
Further, in order to equalize the volumes of the two heat transfer chamber units, the second barrier 15 is connected at a position where the distance between the outer tube wall of the inner tube 502 and the inner tube wall of the outer tube 501 is largest, that is, the second barrier 15 is located in the radial direction of the outer tube 501. While the first barrier layer 13 is symmetrically arranged about the second barrier layer 15 such that the cross-sectional dimensions of the resulting first heat transfer chamber unit 101 and second heat transfer chamber unit 102 are equal and the volumes therebetween are also equal.
On the basis of the above embodiments, in order to facilitate the installation of each component in the heat exchange tube, the first barrier layer 13 and the second barrier layer 15 are connected by using a clamping groove, and can be inserted into a designated position from one end of the outer tube 502 and then welded and fixed at a port.
Specifically, two first positioning grooves 21 are formed in the inner wall of the outer tube 502, and opposite ends of the first interlayer 13 are respectively clamped in the corresponding first positioning grooves 21. The inner pipe wall of the inner pipe 501 and the corresponding position on the outer pipe wall of the inner pipe 502 are respectively provided with a second positioning groove 22, and the opposite ends of the second interlayer 15 are respectively clamped in the second positioning grooves 22 on the outer pipe 502 and the inner pipe 501.
Further, in order to increase the fixing effect on the first barrier layer 13 to enhance the structural stability thereof, one side of the first barrier layer 13 close to the heat insulating cavity 9 is connected with the inner pipe wall of the outer pipe 502 by providing the reinforcing ribs 23, the reinforcing ribs 23 and the second barrier layer 15 are located in the same plane, and the plane is located in the radial direction of the outer pipe 502, and the structural design makes the structure inside the whole heat exchange pipe 5 more stable.
Further, in order to facilitate the installation and fixation of the first spacer layer 13, a third positioning groove 24 for installing the reinforcing rib 23 is provided on the inner wall of the outer tube 502, one end of the reinforcing rib 23 is integrally connected with the first spacer layer 13 to form an integral structure, and the other end of the reinforcing rib is clamped in the third positioning groove 24.
Based on the content of the above embodiment, the embodiment of the present invention further provides a method for installing each structure of a heat exchange tube:
first, the first spacer layer 13 is attached to the inner tube wall of the outer tube 502, and the first spacer layer 13 (including the ribs 23) is connected to the left and right first positioning grooves 21 and the upper third positioning groove 24 on the inner tube wall of the outer tube 502, respectively, so as to be inserted from the port of the heat exchange tube 5.
Next, the connection of the inner tube 501 to the first barrier 13 is installed, the inner tube 501 is likewise inserted from the port of the heat exchange tube 5 and the groove thereon mates with the protrusion on the first barrier 13 until the specified installation position is reached.
Then, the second spacer 15 is inserted from the port of the heat exchange tube 5, and is firmly contacted with the second positioning groove on the outer wall surface of the inner tube 501 and the inner wall surface of the outer tube 502, and finally, the port of the heat exchange tube 5 is sealed by welding or the like.
Finally, the inner tube 501 and the heat transfer chamber may be filled with a corresponding medium as needed.
In the above embodiments, the inner tube 501 and the outer tube 502 may be made of copper tubes, aluminum tubes or stainless steel tubes of various sizes. Further, the inner tube wall of the outer tube 502 is provided with a smooth surface, an internal thread and various other inner tube wall structures for enhancing heat exchange, and the outer tube wall of the outer tube 1 is provided with a smooth surface, an external thread, ribs, a fin structure and various other surface expanding structures 6 for enhancing heat exchange.
On the basis of the above embodiments, in order to prevent the liquid filling rate of the second medium 12 in the outer tube 502 from being too high, in this embodiment, the liquid level of the second medium 12 needs to be limited, specifically, a highest liquid level line 11 may be disposed in the outer tube 502, where the liquid level of the second medium 12 is not allowed to exceed the highest liquid level line 11, and the highest liquid level line 11 is perpendicular to the second barrier 15 and tangential to the inner tube 501, so that the second medium 12 can be prevented from contacting the outer tube wall of the inner tube 501 in the a position of fig. 5 or contacting the inner tube wall of the outer tube 502 in the E position, and further, the heat transfer effect of the second medium 12 in each mode is increased.
On the basis of the above embodiments, the working process of the three-medium heat exchanger according to the embodiment of the invention is as follows:
(1) First and second medium heat exchange modes
The heat exchange is only carried out between the first medium 14 in the inner pipe 501 and the second medium 12 in the outer pipe 502, wherein the mode of zero contact between the second medium 12 in the heat transfer cavity 10 and the inner pipe wall of the outer pipe 502 and the mode of multiple contact between the second medium 12 and the inner pipe wall of the outer pipe 502 can be changed in a rotating mode along the axis (as shown in the position E in fig. 5), and the third medium outside the outer pipe 502 is almost isolated from participating in the heat exchange, so that the heat exchange is only carried out between the first medium 14 and the second medium 12, the heat exchange to the third medium outside the outer pipe 502 is effectively isolated, and the purpose of energy conservation is achieved. On the basis, under the working condition that the heat exchange amount needs to be adjusted, the contact area with the inner pipe wall of the inner pipe 501 can be adjusted, so that the second medium 12 is in contact with the inner wall part of the outer pipe, and although partial energy loss can be caused, the effective adjustment of the heat exchange amount can be realized.
(2) Second, third medium heat exchange mode
The heat exchange is only carried out between the second medium 12 in the outer tube 502 and the third medium outside the outer tube 502, wherein the mode of zero contact between the second medium 12 and the outer tube wall of the inner tube 501 in the heat transfer cavity 10 and the mode of multiple contact between the second medium 12 and the inner tube wall of the outer tube 502 (shown as a position A in fig. 5) can be changed by rotating along the axis, and the first medium 14 is almost isolated from participating in the heat exchange, so that the heat exchange is only carried out between the second medium 12 and the third medium, the heat exchange to the first medium 14 in the inner tube 501 is effectively isolated, and the purpose of energy conservation is achieved. In addition, under the working condition that the heat exchange amount needs to be adjusted, the contact area between the second medium 12 and the wall surface of the outer tube can be adjusted, so that the second medium 12 contacts with the wall part of the inner tube 501, and the effective adjustment of the heat exchange amount can be realized although partial energy loss can be caused.
(3) Three-medium heat exchange mode
Cooling mode: the outer tube wall of the outer tube 502 and the external connection 502 expand the surface structure (such as the external connection surface of the ribs, fins, etc.) to contact with the third medium-hot fluid outside the outer tube 502 (the fluid outside the tube may be hot gas fluid such as air or liquid phase fluid such as hot water) to absorb heat, so that the second medium 12 contacts the inner tube wall of the outer tube 502 and does not contact the outer tube wall of the inner tube 501.
The heat is transferred to the second medium 12 in the outer tube 502, at this time, the second medium 12 in the heat transfer cavity 10 does not flow horizontally by external force, the heat transfer cavity 10 becomes a gravity type heat pipe functional area to run, the second medium 12 absorbs heat and evaporates, the heat is condensed and released on the cold wall surface of the outer tube wall of the inner tube 501, and finally the heat is transferred to the first medium 14, so that the purpose of cooling the fluid outside the heat exchanger is realized, and the continuous refrigeration is realized.
The position a in fig. 5 is the first state of the heat exchange tube 5, and the corresponding refrigeration effect is the best (the area where the inner tube wall of the outer tube 502 directly contacts the second working medium 14 is the largest).
The rotation to the position B is the second state of the heat exchange tube, the rotation to the position C is the third state of the heat exchange tube, and the rotation to the position D is the fourth state of the heat exchange tube, wherein the areas of the inner tube wall of the outer tube 502 and the second working medium 14 in direct contact are gradually reduced, and the corresponding refrigeration effect is also gradually deteriorated.
The rotation to the E position is the fifth state of the heat exchange tube, and the refrigerating effect is the worst (the area where the inner wall of the outer tube 502 directly contacts the second working medium 14 is the smallest).
The sixth state of the heat exchange tube when rotating to the F position, the seventh state of the heat exchange tube when rotating to the G position, and the eighth state of the heat exchange tube when rotating to the H position, wherein the areas of the inner tube wall of the outer tube 502 and the second working medium 14 in direct contact gradually decrease and the corresponding refrigeration effect gradually increases in the sixth state to the eighth state.
In the embodiment, the rotary refrigerating effect from the A to the E (A-B-C-D-E) is gradually weakened, the refrigerating effect from the E to the A (E-F-G-H-A) is gradually enhanced, and finally, the stepless regulation of the refrigerating capacity is realized. ) Specifically, during rotation, E to A rotate counterclockwise in the order of (E-D-C-B-A) (rotation angle is limited to 180 degrees), and the heat exchange effect is the same as that of E to A rotating clockwise in the order of (E-F-G-H-A).
Heating mode: when the first medium 14 is a thermal fluid, the second medium 12 is first contacted with the outer tube wall of the inner tube 501, and the second medium 12 is heated by the outer tube wall of the inner tube 501, at this time, the second medium 12 in the heat transfer cavity 10 does not flow horizontally by external force, the heat transfer cavity 10 becomes a gravity type heat pipe functional area to operate, and the second medium 12 absorbs heat and evaporates.
Then, the heat is condensed and released on the cold wall surface of the inner pipe wall of the outer pipe 502, and finally the heat is transferred to a third medium outside the outer pipe 502, so that the purpose of heating the fluid outside the heat exchanger is realized, and continuous heating is realized.
The position a in fig. 5 is the first state of the heat exchange tube 5, and the corresponding heating effect is the worst (the area of the outer wall of the inner tube 501 in direct contact with the second medium 14 is the smallest).
The rotation to the position B is the second state of the heat exchange tube, the rotation to the position C is the third state of the heat exchange tube, and the rotation to the position D is the fourth state of the heat exchange tube, wherein the areas of the outer tube walls of the inner tube 501 in direct contact with the second medium 14 are gradually increased, and the corresponding heating effect is also gradually enhanced.
The rotation to the E position is the fifth state of the heat exchange tube, and the cooling effect is the worst (the area where the outer wall of the inner tube 501 directly contacts the second medium 14 is the largest).
The sixth state of the heat exchange tube when rotating to the F position, the seventh state of the heat exchange tube when rotating to the G position, and the eighth state of the heat exchange tube when rotating to the H position, wherein the areas of the outer tube walls of the inner tube 501 in direct contact with the second medium 14 gradually decrease and the corresponding heating effect gradually weakens in the sixth state to the eighth state.
In the embodiment, the rotary heating effect from the A to the E (A-B-C-D-E) is gradually enhanced, the heating effect from the E to the A (E-F-G-H-A) is gradually weakened, and finally, the stepless regulation of the heating quantity is realized. ) Specifically, during the rotation, E to A actually rotate anticlockwise (the rotation angle is limited to 180 degrees) in the sequence of (E-D-C-B-A), and the heat exchange effect of each state is the same as the effect of clockwise rotation of E to A in the sequence of (E-F-G-H-A).
According to the three-medium heat exchanger provided by the embodiment, as the second medium used for carrying out heat exchange with the first medium and the third medium is filled in the two heat transfer cavities of the heat exchange tube, due to the action of gravity, the contact area change between the second medium and the outer tube wall of the inner tube or the inner tube wall of the outer tube can be realized by adjusting the rotation angle of the heat exchange tube along the axial direction of the heat exchange tube, so that the third medium does not participate in heat exchange under the working condition of only needing double-medium heat exchange, the energy conservation is facilitated, the stepless adjustment of the refrigerating capacity or the heating capacity can be realized, and the accurate control of the heat exchanger is facilitated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The three-medium heat exchanger comprises a first medium inlet pipe, a first medium outlet pipe and a heat exchange pipe, wherein the heat exchange pipe comprises an inner pipe and an outer pipe sleeved on the inner pipe, two ends of the outer pipe are respectively provided with a second medium inlet and a second medium outlet, and the three-medium heat exchanger is characterized in that,
The two ends of the inner tube are respectively connected with the first medium inlet tube and the first medium outlet tube in a dynamic sealing way;
The heat exchange tube further comprises a first interlayer and a second interlayer, opposite ends of the first interlayer are respectively connected with the inner tube wall of the outer tube and extend along the length direction of the outer tube, the area between the outer tube and the inner tube is divided into a heat insulation cavity and a heat transfer cavity, and the inner tube is positioned in the heat transfer cavity;
The second interlayer is positioned in the heat transfer cavity and extends along the length direction of the outer tube, and the heat transfer cavity is divided into a first heat transfer cavity unit and a second heat transfer cavity unit by at least one second interlayer;
The first heat transfer cavity unit and the second heat transfer cavity unit are communicated with the second medium inlet and the second medium outlet;
further comprises: the device comprises a first sealed rotating shaft and a second sealed rotating shaft, wherein one end of the first sealed rotating shaft is in dynamic sealing connection with the first medium inlet pipe, and the other end of the first sealed rotating shaft is fixedly connected with the inlet end of the inner pipe;
One end of the second sealed rotating shaft is in dynamic sealing connection with the first medium outlet pipe, and the other end of the second sealed rotating shaft is fixedly connected with the outlet end of the inner pipe; the first medium inlet pipe and the first medium outlet pipe are parallel, the number of the heat exchange pipes is multiple, and the heat exchange pipes are arranged at equal intervals along the length direction of the first medium inlet pipe;
the inner tube and the outer tube are eccentrically arranged, the first interlayer is of an arc-shaped structure, and one side, close to the heat transfer cavity, of the first interlayer is internally tangent to the outer tube wall of the inner tube and is connected with the outer tube wall through a clamping groove;
The inner tube and the outer tube are made of copper tubes, aluminum tubes or stainless steel tubes;
The inner tube wall of the outer tube is provided with a smooth surface or an internal thread, and the outer tube wall of the outer tube is provided with a smooth surface, an external thread, a rib or a fin structure. .
2. The three-medium heat exchanger of claim 1, further comprising: the second medium inlet pipe is flexibly connected with the second medium inlet through a hose, and the second medium outlet pipe is flexibly connected with the second medium outlet through the hose;
the second medium inlet pipe and the first medium outlet pipe are positioned at the same end of the outer pipe, and the second medium outlet pipe and the first medium inlet pipe are positioned at the same end of the outer pipe.
3. The three-medium heat exchanger according to claim 2, wherein the second barrier is connected at a position where a distance between an outer tube wall of the inner tube and an inner tube wall of the outer tube is largest, and the first barrier is symmetrically arranged with respect to the second barrier so that a cross-sectional size of the first heat transfer chamber unit and the second heat transfer chamber unit is equal.
4. The three-medium heat exchanger according to claim 3, wherein a first positioning groove is formed in the inner pipe wall of the outer pipe, and the first interlayer is clamped in the first positioning groove;
the inner pipe wall of inner pipe and the corresponding position on the outer pipe wall of inner pipe all are provided with the second constant head tank, the opposite end of second interlayer card respectively establishes the outer pipe with in the second constant head tank of inner pipe.
5. The three-medium heat exchanger according to claim 4, further comprising a reinforcing rib, wherein a side of the first barrier layer adjacent to the heat insulating chamber is connected to an inner tube wall of the outer tube by the reinforcing rib, and wherein the reinforcing rib and the second barrier layer are located in the same plane.
6. The three-medium heat exchanger according to claim 5, wherein a third positioning groove is formed in the inner pipe wall of the outer pipe, one end of the reinforcing rib is integrally connected with the first interlayer, and the other end of the reinforcing rib is clamped in the third positioning groove.
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| CN201910813186.5A CN110425911B (en) | 2019-08-30 | 2019-08-30 | Three-medium heat exchanger |
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| CN110425911B true CN110425911B (en) | 2024-04-19 |
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