Double-medium heat exchange tube

Abstract

The double-medium heat exchange tube comprises a first through tube and a second through tube, and the first through tube is extruded and embedded into the second through tube on the outer side of the second through tube. The composite pipe wall is formed in the mode that the first through pipe is embedded into the second through pipe, and therefore the wall thickness of the first through pipe can be reduced under the condition that the same bearing strength is achieved. And the heat exchange area of the first through pipe and the second through pipe is ensured by embedding the first through pipe and the second through pipe, so that the heat exchange efficiency is ensured, and the wall thickness of the pipeline can be effectively reduced on the premise of ensuring the bearing strength and the heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a dual-medium heat exchange tube. Background Technology

[0002] Heat exchange tubes are a key structure in refrigeration or heating devices, and are the main structure for heat exchange between refrigeration or direct heating devices and the outside world.

[0003] In transcritical carbon dioxide systems, heat exchange tubes are required. Current technology typically uses a multi-head spiral tube encased within an outer tube, utilizing the channel formed between the outer and inner tubes to carry the carbon dioxide refrigerant. Since carbon dioxide refrigerant has a high pressure, both the outer tube and the spiral tube require sufficient wall thickness to ensure pressure resistance. Furthermore, the spiral tube must be made of a special nickel-copper alloy, resulting in high material costs, complex manufacturing processes, and large size for the heat exchange tubes. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a dual-medium heat exchange tube that reduces the pipe wall thickness while ensuring pressure resistance and heat exchange efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] In one aspect, the present invention provides a dual-medium heat exchange tube, comprising a first through-tube and a second through-tube, wherein the first through-tube is pressed and embedded inside the second through-tube on the outside of the second through-tube.

[0007] The beneficial effects of this invention are as follows: by embedding the first pipe into the second pipe, a composite pipe wall is formed. Therefore, the wall thickness of the first pipe can be reduced while achieving the same pressure resistance. Furthermore, the embedding of the first and second pipes ensures their heat exchange area, thereby guaranteeing heat exchange efficiency. Thus, while ensuring both pressure resistance and heat exchange efficiency, the pipe wall thickness can be effectively reduced, thereby lowering the requirements for pipe materials and reducing the cost of the heat exchange pipe.

[0008] Optionally, both the first conduit and the second conduit are heat-conducting metal pipes.

[0009] Optionally, the wall of the second conduit is provided with a curved surface.

[0010] As described above, setting curved surfaces not only optimizes the pipe wall structure and improves pressure resistance, but also increases fluid turbulence, further improving heat exchange efficiency.

[0011] Optionally, at least one set of curved surfaces is provided between the two first conduits.

[0012] As described above, at least one set of curved surfaces is provided between the two first pipes, which makes the fluid disturbance more uniformly affect each heat exchange area, thereby improving the heat exchange efficiency.

[0013] Optionally, the exposed angle of the wall of the first conduit embedded in the second conduit is less than or equal to 80°.

[0014] Optionally, the number of the first conduit is two or more.

[0015] Optionally, the fluid medium in the first conduit and the fluid medium in the second conduit may be the same or different.

[0016] Optionally, the dual-medium heat exchange tube can be coiled into a spiral coil.

[0017] As described above, the overall size of the dual-medium heat exchanger tube can be reduced.

[0018] Optionally, the wall of the second conduit is square or circular.

[0019] Optionally, when the wall of the second conduit is square, the perimeter of the second conduit is rounded. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the dual-medium heat exchanger tube according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional schematic diagram of a dual-medium heat exchanger tube according to another embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. First connecting pipe;

[0024] 2. Second conduit; 21. Curved surface. Detailed Implementation

[0025] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0026] Example 1

[0027] Please refer to Figure 1A dual-medium heat exchange tube includes a first through-tube 1 and a second through-tube 2. The first through-tube 1 is pressed and embedded into the second through-tube 2 outside the second through-tube 2, thus forming a composite tube wall, which can reduce the wall thickness of the first through-tube 1 while ensuring heat exchange efficiency.

[0028] In this embodiment, as Figure 1 As shown, the wall of the second conduit 2 is square in shape, and the two conduits 2 are rounded around their perimeter.

[0029] In this embodiment, a curved surface 21 is provided on the wall of the second pipe 2. The curved surface 21 not only optimizes the pipe wall structure and improves the pressure resistance, but also increases fluid disturbance, thereby improving the heat exchange efficiency.

[0030] Reference Figure 1 It can be seen that at least one set of curved surfaces 21 is provided between the two first pipes 1, which can be one set of curved surfaces 21 or multiple sets of curved surfaces 21, so that the fluid disturbance affects each heat exchange area more evenly, thereby improving the heat exchange efficiency.

[0031] In this embodiment, the curved surface 21 is a partial pipe wall that is misaligned with the overall pipe wall shape of the second conduit 2. This partial pipe wall may exist regularly or irregularly on the overall pipe wall of the second conduit 2. A set of curved surfaces 21 may consist of one curved surface 21 or multiple curved surfaces 21. The curved surface 21 includes a plane with a curvature of 0. For example... Figure 1 As shown, in this embodiment, the overall wall shape of the second conduit 2 is square. Figure 1 The pointed, protruding tube wall is offset from the square shape; therefore, this localized protruding tube wall is referred to as a set of curved surfaces 21, which includes two connecting arc surfaces and two planes. In other embodiments, the set of curved surfaces 21 may also be wavy, arc protrusions, or other regular or irregular protrusions.

[0032] In this embodiment, the exposed angle of the first pipe 1 embedded in the second pipe 2 is 65°. In other embodiments, this exposed angle can be any angle less than or equal to 80°, such as 15°, 40°, or 60°. This exposed angle ensures that the composite pipe wall formed by the two has corresponding pressure-bearing strength and heat exchange area. It also ensures that the exposed outer side of the first pipe 1 is flush with the overall wall of the second pipe 2, or that the exposed outer side of the first pipe 1 is within the overall wall of the second pipe 2.

[0033] In this embodiment, the number of first pipe 1 arranged around the second pipe 2 is 3. In other embodiments, the number of first pipe 1 can be 2 or more, depending on the heat exchange requirements of the internal medium of the first pipe 1 and the second pipe 2. For example, 2, 4, 5, etc. are all acceptable.

[0034] In this embodiment, carbon dioxide refrigerant flows through the channel of the first pipe 1, and water flows through the channel of the second pipe 2. In this case, the fluid media flowing through the first pipe 1 and the second pipe 2 are different. In other embodiments, one fluid medium flows through the first pipe 1, and the same fluid medium flows through the second pipe 2. That is, the fluid media in the first pipe 1 and the fluid media in the second pipe 2 can be the same or different.

[0035] In this embodiment, the dual-medium heat exchange tubes can be coiled into a spiral coil. The cross-section of the spiral coil can be circular like a spring or racetrack-shaped to reduce the overall size of the dual-medium heat exchange tubes. During the coiling process, adjacent dual-medium heat exchange tube coils can be in close contact or have gaps.

[0036] In this embodiment, both the first conduit 1 and the second conduit 2 are heat-conducting metal pipes.

[0037] Example 2

[0038] Please refer to Figure 2 A dual-medium heat exchange tube, based on the first embodiment, wherein the wall of the second through-tube 2 is entirely circular.

[0039] Other examples are shown in Example 1.

[0040] As can be seen from the above embodiments one and two, in other equivalent embodiments, depending on the actual situation, the overall wall of the second conduit 2 can also be elliptical or other shapes.

[0041] In summary, this embodiment improves upon the combination of the first pipe 1 and the second pipe 2 and optimizes the pipe wall of the second pipe 2, thereby reducing the pipe wall thickness while taking into account both pressure resistance and heat exchange efficiency.

[0042] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dual-medium heat exchanger tube, characterized in that, It includes a first tube and a second tube, wherein the first tube is pressed and embedded inside the second tube outside the second tube; Both the first and second through pipes are heat-conducting metal pipes; The exposed angle of the first conduit wall embedded in the second conduit is less than or equal to 80°.

2. The dual-medium heat exchanger tube according to claim 1, characterized in that, The second conduit has a curved surface on its wall.

3. The dual-medium heat exchanger tube according to claim 2, characterized in that, At least one set of curved surfaces is provided between the two first conduits.

4. The dual-medium heat exchanger tube according to any one of claims 1 to 3, characterized in that, The number of the first connecting pipes is two or more.

5. The dual-medium heat exchanger tube according to any one of claims 1 to 3, characterized in that, The fluid medium in the first conduit may be the same as or different from the fluid medium in the second conduit.

6. The dual-medium heat exchanger tube according to any one of claims 1 to 3, characterized in that, The dual-medium heat exchange tube can be coiled into a spiral coil.

7. The dual-medium heat exchanger tube according to any one of claims 1 to 3, characterized in that, The wall of the second conduit is generally square or circular.

8. The dual-medium heat exchanger tube according to claim 7, characterized in that, When the wall of the second conduit is square, the two conduits are rounded around their perimeter.

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