CN113865372A

CN113865372A - Heat exchange element and heat exchanger comprising same

Info

Publication number: CN113865372A
Application number: CN202010621402.9A
Authority: CN
Inventors: 程高锋; 唐海宽; 张宏伟; 王瑞星
Original assignee: Luoyang Mingyuan Petrochemical Industry Technology Co ltd
Current assignee: Luoyang Mingyuan Petrochemical Industry Technology Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-12-31

Abstract

The application discloses heat transfer element includes: a heat transfer core assembly made of a metal material, having a flat shape, and forming at least one fluid medium passage extending in a direction in which the flat shape thereof extends; an outer frame having two panels parallel to the direction in which the flat profile of the heat transfer core assembly extends and enclosing the heat transfer core assembly between the two panels, the panels being made of a material resistant to flue gas dew point corrosion; and a thermal interface material layer composed of a thermal interface material filled in the outer frame to form a thermal interface between the face plate and the heat transfer core assembly. The invention also discloses a heat exchanger comprising the heat exchange element. The heat exchange element and the heat exchanger comprising the same have the advantages of strong adaptability, wide application range, low cost and strong pressure bearing capacity, and stress between combination interfaces of components made of different materials is eliminated, so that the components cannot be damaged, and the reliability is high.

Description

Heat exchange element and heat exchanger comprising same

Technical Field

The invention relates to the field of heat exchangers in industries of oil refining, chemical engineering and the like, in particular to a heat exchange element. The invention also relates to a heat exchanger using the heat exchange element.

Background

Non-metallic materials, such as ceramics, glass, graphite, plastics, etc., are resistant to acids, bases, salts, organic solvents, and many other chemicals. For example, glass resists most acid attacks, and polytetrafluoroethylene plastic resists most attack by corrosive media. However, most non-metallic materials have the problems of poor mechanical properties, such as low strength, poor plastic toughness, difficult processing and forming, and the like, and have the disadvantages of low thermal conductivity, high cost, and the like. Therefore, the application range of the non-metal material independently used as the material of the heat exchange element is narrow.

The metal material has good mechanical property and heat conduction property, is a mainstream heat exchange element material, but is often limited by insufficient corrosion resistance to cause limited application or high cost.

Because the thermal expansion coefficients of the non-metallic material and the metallic material have larger difference, the two materials are compounded to form an acid corrosion resistance, the heat exchange element which can bear high pressure has great difficulty, and under the working condition, huge thermal stress can be generated at the compounding interface position of the tightly combined metallic material and the non-metallic material to cause the non-metallic material to lose efficacy, thereby damaging the heat exchange element formed by the composite material. Therefore, there is a need for a new corrosion-resistant composite heat exchange element that combines the advantages of non-metallic materials and has structural stability and reliability.

Disclosure of Invention

The invention aims to provide a heat exchange element, which combines a metal heat transfer core component and a corrosion-resistant material component made of different materials to form the heat exchange element, can effectively absorb the deformation stress generated on a joint surface and an end part due to the inconsistent thermal deformation between the components made of the two different materials, and has the advantages of corrosion resistance, strong bearing capacity, compact structure, high heat transfer coefficient and the like.

According to an aspect of the present invention, there is provided a heat exchange element comprising:

a heat transfer core assembly made of a metal material, having a flat shape, and forming at least one fluid medium passage extending in a direction in which the flat shape thereof extends;

an outer frame having two panels parallel to the direction in which the flat profile of the heat transfer core assembly extends and enclosing the heat transfer core assembly between the two panels, the panels being made of a material resistant to flue gas dew point corrosion; and

and the thermal interface material layer is composed of a thermal interface material, is filled in the outer frame and forms a thermal interface between the panel and the heat transfer core assembly.

According to the invention, the thermal interface material layer which can allow the metal heat transfer core assembly and the corrosion-resistant outer frame to slide mutually without separating from contact is arranged between the metal heat transfer core assembly and the corrosion-resistant outer frame, so that the metal heat transfer core assembly can be protected from being corroded by a fluid medium, and the mutual thermal stress and deformation caused by different thermal expansion coefficients between the metal heat transfer core assembly and the corrosion-resistant outer frame can be avoided.

Preferably, the at least one fluid medium channel comprises a plurality of fluid medium channels arranged side by side.

Preferably, the heat transfer core assembly comprises more than one heat exchange tube arranged side by side and an elbow connected to an end of the heat exchange tube, the heat exchange tubes being connected to each other in series by the elbow.

Preferably, the heat transfer core assembly comprises more than one heat exchange tube arranged side by side and two header pipes connected to two ends of the heat exchange tube, wherein the axial direction of the header pipe is perpendicular to the axial direction of the heat exchange tube and is communicated with each heat exchange tube, so that the heat exchange tubes are connected in parallel.

Preferably, the side of the heat exchange tube facing the panel is provided with a metal fin parallel to the panel.

Preferably, a deformation compensator is arranged between the adjacent heat exchange tubes, and the deformation compensator is made of an elastic material and has a sealed elastic cavity structure.

Preferably, the heat transfer core assembly comprises a heat transfer core body and a plurality of built-in pipe bodies embedded in the heat transfer core body and arranged side by side, wherein the built-in pipe bodies and the heat transfer core body are made of different metal materials.

Preferably, the heat transfer core is cast outside the inner tubular body.

Preferably, the built-in pipe body is a copper pipe, and the heat transfer core body is an aluminum plate.

Preferably, the heat transfer core assembly comprises a plate tubular metal assembly, the interior of which forms at least one fluid medium channel.

Preferably, the plate-and-tube metal assembly has a plurality of fluid medium passages formed therein in a side-by-side arrangement, and the heat transfer core assembly further includes two collecting chambers respectively formed at both ends of the plurality of fluid medium passages such that the plurality of fluid medium passages are connected in parallel.

Preferably, the plate-tubular metal assembly has a rectangular cross-sectional shape, and the at least one fluid medium channel has a rectangular cross-sectional shape.

The heat transfer core assembly of the present invention may take many different embodiments, and any configuration that provides at least one internal fluid medium passage and achieves heat exchange between internal and external fluid media is within the scope of the present invention.

Preferably, the face plate is made of ceramic, glass, graphite or polytetrafluoroethylene.

Preferably, the thermal interface material includes at least one selected from the group consisting of a thermally conductive silicone grease, a thermally conductive gel, a thermally conductive phase change material, a thermally conductive cement, a thermally conductive pad, a thermally conductive oil, and a non-drying thermally conductive sealant.

Preferably, the outer frame further comprises a frame that surrounds the edges of the two panels to form a space surrounding the heat transfer core assembly.

Preferably, the frame is made of ceramic, glass, graphite, polytetrafluoroethylene, a metal material resistant to dew point corrosion of smoke, a metal material subjected to surface corrosion prevention processing, or a combination thereof.

Preferably, the heat transfer core assembly has a fluid inlet pipe and a fluid outlet pipe, the outer frame is provided with an inlet opening and an outlet opening through which the fluid inlet pipe and the fluid outlet pipe pass, and the outer frame sealingly surrounds the heat transfer core assembly with only the fluid inlet pipe and the fluid outlet pipe exposed.

According to another aspect of the present invention, there is provided a heat exchanger comprising a heat exchange element as described above.

In summary, the heat transfer core assembly made of metal material and having a plurality of heat exchange channels is combined with the external frame made of corrosion-resistant material, and a proper thermal interface is formed between the heat transfer core assembly and the external frame, so that the heat exchange element with corrosion resistance, small thermal stress and high mechanical strength is constructed.

The heat exchange element and the heat exchanger comprising the same can fully exert the respective performance characteristics of metal materials and non-metal materials, achieve the advantages of adapting to medium corrosion characteristics and efficiently transferring heat according to the characteristics of application conditions, and have strong adaptability and wide application range.

According to the heat exchange element and the heat exchanger comprising the same, the medium with high medium pressure and weak corrosivity can enter the cheap metal heat transfer core assembly, and the low-pressure strong corrosive medium is contacted with the outer frame of the material capable of resisting the corrosion of the medium, so that a large amount of precious metals are saved, and the heat exchange element has the advantage of low cost.

The heat exchange element and the heat transfer core assembly of the heat exchanger comprising the heat exchange element adopt a metal material tubular structure or a multi-channel plate-tube structure with good mechanical properties, and have strong pressure bearing capacity.

According to the heat exchange element and the heat exchanger comprising the same, as the thermal interface material is in a paste state, a gel state or a liquid state and exists between the components made of different materials, the shape of the thermal interface material can be changed along with the change of the gap between the components made of different materials, the deformation of the thermal interface material and the deformation of the components made of different materials can not be limited, the thermal deformation at the interface between the components made of different materials can not be mutually restricted, and the stress between the bonding interfaces between the components made of different materials can be eliminated. Therefore, the damage is not generated and the reliability is high.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic view of a heat exchange element according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a heat transfer core assembly in the heat exchange element shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along section A-A in FIG. 1;

FIG. 4 is an enlarged partial view of FIG. 3;

FIG. 5 is an enlarged view of a finned tube used with the heat transfer core element shown in FIG. 3;

FIG. 6 is a schematic view of a heat exchange element according to a second embodiment of the present invention;

FIG. 7 is a schematic view of a heat transfer core assembly of the heat exchange element shown in FIG. 6;

FIG. 8 is a schematic view of a heat exchange element according to a third embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along section B-B in FIG. 8;

FIG. 10 is a schematic view of a heat transfer core assembly of a heat exchange element according to a fourth embodiment of the present invention;

FIG. 11 is a schematic view of a heat exchange element according to a fifth embodiment of the present invention;

FIG. 12 is a schematic view of a heat transfer core assembly of the heat exchange element of FIG. 11;

13 is a sectional view taken along section C-C in fig. 11;

FIG. 14 is an enlarged partial view of FIG. 13;

FIG. 15 is a schematic view of the sheet metal tubes of the heat transfer core assembly of FIG. 13.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

The heat exchange element is generally used for a heat exchanger, one fluid heat exchange medium flows through the heat exchange element, and the other fluid heat exchange medium flows through the heat exchange element, so that the heat exchange of the two heat exchange media is realized. The heat exchange element of the present invention is typically arranged to pass a stream of hot, corrosive fluid heat exchange medium through the exterior of the heat exchange element. The invention has the conception that the metal heat transfer core assembly is adopted, the outer frame made of corrosion-resistant materials is coated outside the metal heat transfer core assembly, the thermal interface material is arranged between the inner surface of the outer frame made of the corrosion-resistant materials and the outer surface of the metal heat transfer core assembly, the thermal interface material has better deformation performance and filling performance, the interfaces of the heat transfer core assembly, the frame, the corrosion-resistant panel and the deformation compensator which are contacted with the thermal interface material can mutually slide and are not separated from the contact, and no fixed constraint is generated, so that the thermal deformation stress at the connecting interface is eliminated. Thus, a heat exchange element is realized which is corrosion resistant and avoids stresses between the outer frame and the metal heat transfer core assembly made of corrosion resistant materials due to different coefficients of thermal expansion.

The thermal interface material can be non-solid paste thermal interface materials, such as heat-conducting silicone grease, heat-conducting gel, heat-conducting phase change material, heat-conducting clay, heat-conducting pad, heat-conducting oil, non-drying heat-conducting sealant and the like, and the thermal interface material has high thermal conductivity which is generally not lower than 1.2W/(m.K).

Fig. 1 is a schematic view of a heat exchange element according to a first embodiment of the present invention. A heat exchange element is generally indicated at 100. The outer frame 101 of the heat exchange element 100 is shown, and a fluid medium inlet pipe 103 and a fluid medium outlet pipe 104 are shown extending from the lower end of the outer frame 101. The fluid medium passage 102 is also shown in phantom.

FIG. 2 is a schematic view of heat transfer core assembly 105 in heat exchange element 100 shown in FIG. 1. The heat transfer core assembly 105 is composed of a plurality of metal finned tubes 106 arranged side by side, the ends of the metal finned tubes 106 on the same side are connected by metal bent tubes to form a plurality of fluid medium channels 102 connected in series with each other, and the free ends of the metal finned tubes 106 on the sides form a fluid inlet pipe 103 and a fluid outlet pipe 104.

Heat exchange member 100 includes a heat transfer core assembly 105, an outer frame 102, and a thermal interface material layer 111 (see fig. 4) filled inside outer frame 102 and formed as a thermal interface between the inner surface of the outer frame and the outer surface of heat transfer core assembly 105.

Outer frame 102 is provided with inlet and outlet openings through which said fluid inlet and

outlet tubes

103 and 104 pass, and outer frame 102 sealingly surrounds heat transfer core assembly 105, leaving only fluid medium inlet tube 103 and fluid medium outlet tube 104 exposed. The connection between the inlet opening and the outlet opening of the outer frame 102 and the fluid inlet pipe 103 and the fluid outlet pipe 104 of the heat transfer core assembly 105 can adopt a conventional sealing structure with a fastener, a gasket and two connecting surfaces, and the gasket can be made of non-metallic materials with acid corrosion resistance, such as fluororubber, tetrafluoro material and the like. The connection is a sliding seal which can effectively absorb thermal deformation between the heat transfer core assembly 105 and the outer frame 101, and when the elongation amounts are not uniform, the sliding seal slides to absorb stress generated between the fluid inlet pipe 103 and the fluid outlet pipe 104 and the outer frame 111.

FIG. 3 is a cross-sectional view taken along section A-A in FIG. 1, and as can be seen in conjunction with FIGS. 2 and 3, heat transfer core assembly 105 has a flattened profile forming at least one fluid medium passage 102 extending in a direction along which its flattened profile extends. The outer frame 101 includes two face plates 108 parallel to the direction in which the flat profile of the heat transfer core assembly 105 extends, and a fixed frame 109, and the fixed frame 109 is enclosed on the edges of the two face plates 108, forming a space surrounding the heat transfer core assembly 105. The face plate 108 is made of a material resistant to dew point corrosion from flue gases, such as ceramic, glass, graphite, or polytetrafluoroethylene. The fixed frame 109 is made of non-metallic materials such as ceramic, glass, graphite, polytetrafluoroethylene, etc., or made of metal materials resistant to flue gas dew point corrosion, composite metal materials, metal materials subjected to surface corrosion prevention processing such as surface corrosion prevention coating processing, lining plastic processing, etc., or made of a combination thereof.

In this embodiment, the fixing frame 109 fixes the panel 108, the metal finned tube 106, the deformation compensator 107 and the thermal interface material layer 111 in place through the edge pressing frame 104 and the fasteners, and a sealing gasket may be disposed at the joint of the fixing frame 109 and the panel to form a closed anti-corrosion protection layer around the heat transfer core assembly 105 made of metal. The sealing gasket material can be made of non-metal materials with acid corrosion resistance, such as fluororubber, tetrafluoro material and the like. In addition to the fastening members, the fixed frame 109 and the panel 108 may be connected by a fixed sealing method such as bonding or brazing when the fixed frame 109 and the panel 108 are thermally displaced and matched, and the connection material between the fixed frame 109 and the panel 108 may be a material with acid corrosion resistance such as corrosion-resistant adhesive or corrosion-resistant brazing flux. The fixing frame 109 and the hem frame 104 may be formed integrally, or in other structures, as long as the panels, the metal finned tubes, the deformation compensator, and the thermal interface material layer can be fastened in place.

Fig. 4 is a partial enlarged view of fig. 3, and as can be seen in conjunction with fig. 2 to 4, in the present embodiment, the heat transfer core assembly 105 includes a plurality of metal fin tubes 106 arranged side by side, and a deformation compensator 107 arranged between the metal fin tubes 106 or between a fixed frame 109 and the metal fin tubes 106.

The strain compensator 107 is formed of an elastic material and has a closed elastic cavity structure. The material can be rubber hyperelastic material, and also can be elastic composite material, such as organic composite elastic material supported by metal framework. The cavity of the hollow glass tube can be hollow, and can also be filled with filler. The deformation compensator 107 can change the volume and size of the thermal interface material layer 111, the outer frame 101 and the heat transfer core assembly 105 to adapt to the change of the gap and generate corresponding deformation, so as to avoid the thermal interface material layer 111 from expanding and overflowing, avoid the fixed frame 109 and the panel 108 from being damaged due to deformation, and reduce the filling amount of the thermal interface material layer 111, so as to reduce the cost. The strain compensator 107 is not required and may not be used in some embodiments, or the space occupied by the strain compensator 107 may be directly filled with a thermal interface material.

FIG. 5 is an enlarged view of the finned tube used in the heat transfer core element shown in FIG. 3. As can be seen from fig. 3 to 5, the metal finned tube 106 comprises a heat transfer tube 110 and a metal fin 112 arranged in parallel up and down, the metal fin 112 and the tube body 110 are welded, soldered or bonded by high thermal conductivity adhesive, and the width of the filling area of the connecting material 113 between the two is equal to or slightly smaller than the diameter of the tube body 110.

In the present embodiment, although heat transfer core assembly 105 is described as including a plurality of metal finned tubes 106, metal finned tubes 106 may be light pipes, and the cross-sectional shape thereof and the cross-sectional shape of fluid medium channel 102 may be circular, oval, rectangular, or the like, which have superior overall performance.

Fig. 6 is a schematic view of a heat exchange element 200 according to a second embodiment of the present invention. As shown in fig. 6, the heat exchange element 200 includes an outer frame 201, and a fluid medium inlet pipe 203 and a fluid medium outlet pipe 204 that extend from the outer frame 201. At least one fluid medium passage 202 is also shown in phantom.

FIG. 7 is a schematic view of the heat transfer core assembly 205 in the heat exchange element 200 shown in FIG. 6. The heat exchange member 200 includes a heat transfer core assembly 205, an outer frame 202, and a thermal interface material layer (similar to the thermal interface material layer 111 in fig. 4) filled in the outer frame 202 to form a thermal interface between the inner surface of the outer frame 202 and the outer surface of the heat transfer core assembly 205.

The heat transfer core assembly 205 is constituted by a plurality of metal fin tubes 206 arranged side by side, and unlike the first embodiment, the ends of the metal fin tubes 206 on the same side are connected by the same metal header pipe, the axial direction of the header pipe is perpendicular to the axial direction of the metal fin tubes 206, and communicates with each of the metal fin tubes 206, so that the metal fin tubes 206 are connected in parallel to form a plurality of fluid medium channels 202 connected in parallel to each other, and further, a fluid medium inlet pipe 203 extends therefrom from the upper side portion of the outer frame 201, and a fluid medium outlet pipe 204 extends therefrom from the lower side portion of the outer frame 201.

The arrangement of the finned metal tubes 206 of the heat exchange element 200, the finned metal tubes 206, and the strain compensator (not shown) and the outer frame 202 in the second embodiment is exactly the same as that in embodiment 1, and will not be described in detail here, and reference may be made to fig. 3 to 5 in the first embodiment.

Although the plurality of metal fin tubes 106 in the first embodiment are arranged in series and the plurality of metal fin tubes 206 in the second embodiment are arranged in parallel, in practice, the plurality of

metal fin tubes

106 and 206 in the first and second embodiments may be arranged in a combination of series and parallel.

FIG. 8 is a schematic view of a heat transfer core assembly of a heat exchange element according to a third embodiment of the present invention. The third embodiment differs from the first embodiment in that the heat transfer core assembly 305 is different in structure from the heat transfer core assembly 105.

Heat transfer core assembly 305 is shown in FIG. 8, showing its heat transfer core 314, as well as fluid media inlet tube 303 and fluid media outlet tube 304 extending from the lower end of heat transfer core 314. At least one fluid medium passage 302 is also shown in phantom.

Fig. 9 is a sectional view taken along the B-B section in fig. 8. As clearly seen in the drawing, the heat transfer core assembly 305 includes a heat transfer core 314 and a plurality of inner pipe bodies 310 embedded in the heat transfer core 314 and arranged side by side, the fluid medium passage 302 is defined by hollow cavities of the inner pipe bodies 310, the heat transfer core 314 is cast outside the inner pipe bodies 310, ends of the inner pipe bodies 310 on the same side are connected by a metal elbow, a plurality of fluid medium passages 302 are formed in series with each other, and a fluid medium inlet pipe 303 and a fluid medium outlet pipe 304 shown in fig. 8 extend from free ends of two inner pipe bodies 310 on the side. The inner tube 310 and the heat transfer core 314 are made of different metal materials, for example, the inner tube 310 is a copper tube, and the heat transfer core 314 is an aluminum plate.

It can be seen that the heat transfer core assembly 305 of the third embodiment is a cast-in-one structure. The outer frame 301 and the layer of thermal interface material (not shown) of this third embodiment are the same as those of the first embodiment and will not be described in detail here.

FIG. 10 is a schematic view of a heat transfer core assembly of a heat exchange element according to a fourth embodiment of the present invention. A heat transfer core assembly is indicated generally at 405. FIG. 10 shows heat-transfer core 414 of heat-transfer core assembly 405, as well as fluid medium inlet tube 403 extending from the upper side of heat-transfer core 414 and fluid medium outlet tube 404 extending from the lower side of heat-transfer core 414. The heat transfer core assembly 405 of this fourth embodiment is a cast-in-one structure similar to the heat transfer core assembly 305 of the third embodiment, and differs from the third embodiment in that the ends of the built-in pipe bodies 410 on the same side are connected by the same metal header pipe, the axial direction of the header pipe being perpendicular to the axial direction of the built-in pipe bodies 410, and communicating with each of the built-in pipe bodies 410, so that the built-in pipe bodies 410 are connected in parallel to form a plurality of fluid medium passages 402 connected in parallel to each other, and further, a fluid medium inlet pipe 403 is extended from the upper side of the heat transfer core 414, and a fluid medium outlet pipe 404 is extended from the lower side of the heat transfer core 414.

Due to this structure of the heat transfer core assembly 405, it employs the outer frame, thermal interface material layer structure in the second embodiment.

The same structure of the heat transfer core assembly of the fourth embodiment as that of the third embodiment, and the same structure of the outer frame and the thermal interface material layer of the second embodiment will not be described in detail.

Fig. 11 is a schematic view of a heat exchange element according to a fifth embodiment of the present invention. A heat exchange element is generally indicated at 500. The outer frame 501 of the heat exchange element 500 is shown, and a fluid medium inlet pipe 503 extended from the upper end of the outer frame 501 and a fluid medium outlet pipe 504 extended from the lower end of the outer frame 501. Fluid medium passage 502 is also shown in phantom.

FIG. 12 is a schematic view of heat transfer core assembly 505 of heat exchange element 500 shown in FIG. 11. The heat transfer core assembly 505 comprises a sheet metal tube 510, a collecting chamber 515 located at both ends of the sheet metal tube 510, respectively, and a fluid medium inlet pipe 503 extending from the upper collecting chamber 515 and a fluid medium outlet pipe 504 extending from the lower collecting chamber. Fig. 11 also shows the fluid medium channel 502 in a dotted line, and the collecting chambers 515 are respectively formed at both ends of the fluid medium channel 502 so that a plurality of the fluid medium channels 502 are connected in parallel.

Fig. 13 is a sectional view taken along a section B-B in fig. 11, fig. 14 is a partially enlarged view of fig. 13, and fig. 15 is a sectional view of the sheet metal tube in fig. 13. As can be seen in conjunction with fig. 13 to 15, a plurality of fluid medium passages 502 arranged side by side are formed inside the metal plate tube 510, the metal plate tube 510 has a rectangular cross-sectional shape, and the fluid medium passages 502 have a rectangular cross-sectional shape. The metal plate tube 510 may have a shape having excellent overall performance such as an oval shape and a circular shape.

Referring to fig. 11 to 14, it is shown that the heat exchange member 500 includes a heat transfer core assembly 505, an outer frame 502, and a thermal interface material layer 511 (see fig. 14) filled in the outer frame 502 to form a thermal interface between the inner surface of the outer frame 502 and the outer surface of the heat transfer core assembly 505. The outer frame 501 comprises two panels 508 and a fixed border 509 parallel to the direction in which the flat profile of the heat transfer core assembly 505 extends, enclosing the heat transfer core assembly 505, the panels 508 being made of a material resistant to dew point corrosion by fumes.

The outer frame 502 structure in this fifth embodiment is the same as that in the first to fourth embodiments except that the inlet opening and the outlet opening are at the upper and lower ends, respectively, and will not be described in detail.

Although the fluid medium passage is shown in plural in the above-described embodiment, the case of one fluid medium passage can be realized by the present invention, and it is within the scope of the present invention.

Heat exchangers employing heat exchange elements according to the present invention are also within the scope of the present application.

According to the heat exchange element and the heat exchanger comprising the same, as the thermal interface material is in a paste state, a gel state or a liquid state and exists among the components made of different materials, the shape of the thermal interface material can be changed along with the change of gaps among the components made of different materials, the components made of different materials are not deformed to generate constraint, the thermal deformation at the interface between the components made of different materials is not restrained, and the stress between the bonding interfaces among the components made of different materials is eliminated. Therefore, the damage is not generated and the reliability is high.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A heat exchange element comprising:

2. The heat exchange element of claim 1, wherein the at least one fluid medium channel comprises a plurality of fluid medium channels arranged side-by-side.

3. A heat exchange element according to claim 2, wherein the heat transfer core assembly comprises more than one heat exchange tube arranged side by side and an elbow connected to an end of the heat exchange tube, the heat exchange tubes being connected to each other in series by the elbow.

4. A heat exchange element according to claim 2, wherein the heat transfer core assembly comprises more than one heat exchange tube arranged side by side and two header pipes connected at both ends of the heat exchange tubes, the header pipes having an axial direction perpendicular to an axial direction of the heat exchange tubes and communicating with each of the heat exchange tubes so that the heat exchange tubes are connected in parallel.

5. A heat exchange element according to claim 3 or 4, wherein the sides of the heat exchange tubes facing the panels are provided with metal fins parallel to the panels.

6. The heat exchange element according to claim 3 or 4, wherein a deformation compensator is arranged between the adjacent heat exchange tubes, and the deformation compensator is formed by an elastic material and has a closed elastic cavity structure.

7. The heat exchange element according to claim 2, wherein the heat transfer core assembly comprises a heat transfer core and a plurality of inner pipe bodies embedded in the heat transfer core and arranged side by side, the inner pipe bodies and the heat transfer core being made of different metal materials.

8. The heat exchange element of claim 7, wherein the heat transfer core is cast outside the inner tube body.

9. The heat exchange element of claim 7 or 8, wherein the inner tube body is a copper tube and the heat transfer core is an aluminum plate.

10. The heat exchange element of claim 1, wherein the heat transfer core assembly comprises a plate tubular metal assembly having at least one fluid medium channel formed therein.

11. The heat exchange element of claim 10, wherein the interior of the plate-tubular metal assembly forms a plurality of fluid medium channels arranged side-by-side, and the heat transfer core assembly further comprises two pooling chambers formed at both ends of the plurality of fluid medium channels, respectively, such that the plurality of fluid medium channels are connected in parallel.

12. The heat exchange element of claim 10 or 11, wherein the plate-tubular metal assembly has a rectangular cross-sectional shape and the at least one fluid medium channel has a rectangular cross-sectional shape.

13. The heat exchange element of any one of claims 1-4, 7, 8, 10 and 11, wherein the face plate is made of ceramic, glass, graphite or polytetrafluoroethylene.

14. The heat exchange element of any of claims 1-4, 7, 8, 10, and 11, wherein the thermal interface material comprises at least one selected from the group consisting of thermally conductive silicone grease, thermally conductive gel, thermally conductive phase change material, thermally conductive cement, thermally conductive pad, thermally conductive oil, and non-drying thermally conductive sealant.

15. The heat exchange element of any one of claims 1-4, 7, 8, 10 and 11, wherein the outer frame further comprises a frame that is enclosed on the edges of the two panels to form a space that encloses the heat transfer core assembly.

16. The heat exchange element of claim 15, wherein the frame is made of ceramic, glass, graphite, polytetrafluoroethylene, a metal material resistant to dew point corrosion of flue gas, a metal material subjected to surface corrosion protection processing, or a combination thereof.

17. The heat exchange element of any one of claims 1-4, 7, 8, 10 and 11, wherein the heat transfer core assembly has a fluid inlet pipe and a fluid outlet pipe, the outer frame is provided with inlet and outlet openings through which the fluid inlet and outlet pipes pass, and the outer frame sealingly surrounds the heat transfer core assembly exposing only the fluid inlet and outlet pipes.

18. A heat exchanger comprising a heat exchange element according to any one of claims 1 to 17.