Condensing coil and condenser thereof

Abstract

The utility model provides a kind of condensing coil and its condenser, it is related to refrigeration system technical field, condensing coil includes: heat exchange pipe and two end plates, the heat exchange pipe includes mutually communicating main pipe section and variable diameter pipe section, the variable diameter pipe section includes at least one diameter part and more than two variable diameter parts, the diameter part is distributed with more than two the variable diameter part alternately;Two end plates are mutually spaced, and the both ends of the heat exchange pipe are connected with two end plates;The condensing coil of the utility model, the variable diameter pipe section of heat exchange concern has diameter part and more than two variable diameter parts of distribution alternately, variable diameter part is mutually spaced, so that each variable diameter part bears a part of pressure fluctuation and mechanical stress, to disperse the pressure fluctuation and mechanical stress at variable diameter, to improve the stability and service life of heat exchange pipe, so that the stability degree of condensing coil whole is good, and service life is long.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to condensing coils and their condensers. Background Technology

[0002] Common constant-diameter heat exchange tubes tend to form laminar flow during fluid flow, resulting in low heat transfer efficiency. To address this issue, variable-diameter heat exchange tube condensing devices have been employed in related technologies. While existing variable-diameter heat exchange tube condensing devices improve heat transfer efficiency to some extent, they still suffer from insufficient hydrodynamic performance. Significant pressure fluctuations and mechanical stresses occur at the diameter change points of the heat exchange tubes, limiting the stability and service life of the heat exchange tubes and condenser coils.

[0003] In view of this, a new technical solution is needed to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a condensing coil and its condenser, which have good stability and long service life.

[0005] To achieve the above objectives, the present invention employs the following technical means:

[0006] A first aspect of this utility model provides a condenser coil, comprising:

[0007] A heat exchange tube, the heat exchange tube comprising a main tube section and a variable diameter tube section that are interconnected, the variable diameter tube section comprising at least one diameter section and two or more variable diameter sections, the diameter section and the two or more variable diameter sections being distributed alternately;

[0008] Two end plates are provided, spaced apart from each other, and both ends of the heat exchange tube are connected to the end plates.

[0009] Optionally, the inner diameter of the variable diameter pipe section is reduced in a stepwise manner.

[0010] Optionally, the inner diameter of the variable diameter pipe section increases as the distance between the main pipe section and one end of the heat exchange tube decreases.

[0011] Optionally, each heat exchange tube is provided with two variable diameter pipe sections, which are respectively located at the input end and the output end of the main pipe section.

[0012] Optionally, the diameter portion and the diameter-reducing portion of the same variable-diameter pipe section are coaxially arranged.

[0013] Optionally, the inner wall of the variable diameter section is provided with a hydrophobic coating.

[0014] Optionally, a turbulent region is formed within the variable diameter pipe section, and a laminar flow region is formed within the main pipe section.

[0015] Optionally, the end plate is provided with an inlet manifold and an outlet manifold, through which fluid enters the heat exchange tube and exits the heat exchange tube.

[0016] A second aspect of this utility model provides a condenser comprising any of the condenser coils described above.

[0017] Optionally, it also includes an adjustable fan system and multiple temperature sensors. The adjustable fan system includes a fan and a control module, and the control module is electrically connected to the fan and the multiple temperature sensors respectively.

[0018] Compared with the prior art, this utility model brings the following technical effects:

[0019] The condenser coil of this invention has alternating diameter sections and two or more diameter-changing sections in the heat exchange section. The diameter-changing sections are arranged at intervals so that each diameter-changing section bears a portion of the pressure fluctuations and mechanical stress, thereby dispersing the pressure fluctuations and mechanical stress at the diameter change point, improving the stability and service life of the heat exchange tube, and thus the overall stability of the condenser coil is good and the service life is long. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 Schematic diagrams of the condenser coils of some embodiments are shown.

[0022] Figure 2 A front view of a condenser coil according to some embodiments is shown;

[0023] Figure 3 Schematic diagrams of the heat exchange tubes in some embodiments are shown;

[0024] Figure 4 It shows Figure 3 A magnified view of part A;

[0025] Figure 5 It shows Figure 3 A magnified view of part B.

[0026] Explanation of key component symbols:

[0027] 100-Condensing coil; 10-Heat exchange tube; 11-Main pipe section; 12-Reducing pipe section; 121-Diameter section; 122-Reducing section; 123-Hydrophobic coating; 13-Inlet manifold; 14-Outlet manifold; 20-End plate. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0030] Please see Figures 1-5 The first aspect of this utility model provides a condensing coil 100. The condensing coil 100 includes a heat exchange tube 10 and two end plates 20, which are spaced apart from each other. Both ends of the heat exchange tube 10 are connected to the two end plates 20 respectively. The heat exchange tube 10 includes a main pipe section 11 and a reducing pipe section 12 that are interconnected. The reducing pipe section 12 includes at least one diameter portion 121 and two or more reducing portions 122, with the at least one diameter portion 121 and the two or more diameter portions 121 distributed alternately.

[0031] The condenser coil of this invention has a variable diameter section 12 of the heat exchange tube 10 with alternating diameter portions 121 and two or more variable diameter portions 122. The variable diameter portions 122 are arranged at intervals so that each variable diameter portion 122 bears a portion of the pressure fluctuation and mechanical stress, thereby dispersing the pressure fluctuation and mechanical stress at the diameter change point, improving the stability and service life of the heat exchange tube 10, and thus the condenser coil 100 has good overall stability and a long service life.

[0032] Furthermore, since the cross-sectional areas of the diameter section 121 and the variable diameter section 122 are different, when the fluid passes through the variable diameter section 122, the variable diameter section 122 compresses the fluid to form turbulence. The turbulence increases the heat exchange and flow velocity between the fluid and the variable diameter section 122. The increased flow velocity further promotes micro-vortices and mixing effects, improving heat transfer efficiency. Laminar flow is formed in the direct flow section to reduce and disperse the pressure fluctuations and mechanical stresses generated by the fluid within the variable diameter pipe section 12.

[0033] It should be noted that the alternating distribution of diameter portion 121 and variable diameter portion 122 can be understood as an alternating distribution of diameter portion 121 and variable diameter portion 122. For example, two adjacent variable diameter portions 122 are connected to the two ends of a diameter portion 121.

[0034] Please see Figure 1 and Figure 2 The condenser coil 100 extends along an S-shaped path and is equipped with an inlet manifold 13 and an outlet manifold 14, which are located at opposite ends of the same end plate 20. Gaseous fluid enters the condenser coil 100 through the inlet manifold 13 and is gradually liquefied during its flow within the condenser coil 100. Finally, the fluid is discharged from the condenser coil 100 in liquid form through the outlet manifold 14.

[0035] In this embodiment, the fluid is liquefied in the condenser coil 100 via a refrigeration device. In this embodiment, the refrigeration device is a fan, whose exhaust air exchanges heat with the heat exchange tube 10, thereby cooling the fluid located within the condenser coil 100. Of course, the refrigeration device is not limited to a fan; liquid cooling devices or phase change medium devices can also be used to cool the fluid. In the condenser scenario, the fluid can be a refrigerant.

[0036] The inlet manifold 13 and the outlet manifold 14 are located at opposite ends of the same end plate 20. This arrangement avoids dead zones in the condenser coil 100, fully utilizes the transport space of the condenser coil 100, and improves the cooling efficiency of the condenser coil 100.

[0037] Please see Figure 2 There are multiple heat exchange tubes 10, arranged side by side. Each heat exchange tube 10 includes an interconnected main pipe section 11 and a reducing pipe section 12. It is understood that the diameters of any two cross-sections of the main pipe section 11 are consistent. However, the diameters of any two cross-sections of the reducing pipe section may differ.

[0038] Specifically, each heat exchange tube 10 has one main pipe section 11 and two reducing pipe sections 12, with the two reducing pipe sections 12 located at both ends of the main pipe section 11. That is, one reducing pipe section 12 is located at the input end of the heat exchange tube 10, and the other reducing pipe section 12 is located at the output end of the heat exchange tube 10.

[0039] Please see Figure 3 , Figure 3 A partially enlarged schematic diagram shows the specific structure of the variable diameter tube section 12 at the outlet end of the heat exchange tube 10. Each variable diameter tube section 12 includes five diameter sections 121 and four variable diameter sections 122 distributed alternately, with each end of a variable diameter section 122 connected to two adjacent diameter sections 121. The direction of fluid flow is as follows: Figure 3As indicated by the arrow in the diagram, the diameter of the reducing pipe section 12 decreases in a stepwise manner along the fluid flow direction.

[0040] The stepped change in the inner diameter of the main pipe section 11 can generate turbulence in the variable diameter pipe section 12 and gradually increase or decrease the fluid velocity, avoiding excessively rapid changes in fluid velocity that could lead to large local mechanical stress, thus further improving the operational stability of the variable diameter pipe section 12.

[0041] Furthermore, the inner diameter of the main pipe section 11 increases as the distance between the main pipe section 11 and one end of the heat exchange tube 10 decreases. In this way, a pressure difference can be generated inside the main pipe section 11 to control the fluid to pass through the heat exchange tube 10 at a relatively fast or relatively slow speed.

[0042] The heat exchange tube 10 has an inlet end and an outlet end. Specifically, the inner diameter of the reducing pipe section 12 increases as the main pipe section 11 decreases and the outlet end of the heat exchange tube 10 decreases.

[0043] Each heat exchange tube 10 is provided with two reducing pipe sections 12, which are respectively located at the input end and the output end of the main pipe section 11.

[0044] Please see Figure 4 For example, the inner diameters of the five diameter portions 121 along the direction of fluid flow are D5, D4, D3, D2, and D1, respectively, wherein D5 < D4 < D3 < D2 < D1.

[0045] The diameter of the variable diameter tube section 12 at the output end of the heat exchange tube 10 gradually increases along the flow direction of the fluid. This reduces the fluid velocity, thereby reducing the local stress caused by the collision when the fluid enters the next heat exchange tube 10, and ensuring the stability of the fluid at the connection between two adjacent heat exchange tubes 10.

[0046] Please see Figure 5 For the variable-diameter pipe section 12 at the output end of the heat exchanger tube 10, the diameter of the diameter portion 121 in this variable-diameter pipe section 12 decreases in a stepwise manner along the fluid flow direction. In this way, the fluid velocity gradually increases in this variable-diameter pipe section 12, creating a pressure difference with the input end of the heat exchanger tube 10 to force the fluid into the heat exchanger tube 10, thereby improving the fluid flow efficiency in the heat exchanger tube 10. Figure 5 The arrows indicate the direction of fluid flow within the reducing pipe section 12.

[0047] In summary, by increasing the inner diameter of the main pipe section 11 along with the reduction of the ends of the main pipe section 11 and the heat exchange tube 10, the flow efficiency and stability of the fluid in the heat exchange tube can be improved.

[0048] Correspondingly, the variable diameter tube section 12 at the output end of the heat exchange tube 10 may also include five diameter sections 121 and four variable diameter sections 122 distributed alternately, with the two ends of the variable diameter section 122 respectively connected to two diameter sections 121.

[0049] In other embodiments, the number of the same heat exchange tube 10 is not limited to two, and its location is not limited to the inlet and outlet ends of the heat exchange tube 10. For example, a heat exchange tube 10 may have three, four, or five variable diameter tube sections 12 spaced apart from each other in the middle. Alternatively, a heat exchange tube 10 may have only one variable diameter tube section 12.

[0050] Furthermore, the number, length, and diameter of the diameter portions 121 and 122 in a reducing pipe section 12 can be adaptively adjusted according to actual needs, and are not limited to the specific limitations of this embodiment. In the simplest case, there is one diameter portion 121 and two reducing portions 122, with both ends of the diameter portion 121 connected to the two reducing portions 122 respectively.

[0051] Please refer to it again. Figure 4 Optionally, the inner wall of the diameter portion 121 of the reducing pipe section 12 is provided with a hydrophobic coating 123.

[0052] The hydrophobic coating 123 prevents the fluid inside the pipe from directly contacting the inner wall of the diameter section 121, and by utilizing its own hydrophobic properties, it can reduce the formation of deposits inside the variable diameter pipe section 12, improve the anti-scaling ability, and extend the service life of the equipment.

[0053] Combination Figure 3 and Figure 4 In one specific embodiment, a turbulent region is formed within the variable-diameter pipe section 12, and a laminar flow region is formed within the main pipe section 11. The heat transfer efficiency of the fluid is low in the laminar flow region, but its fluid dynamics are strong, which can improve the flow efficiency of the fluid within the heat exchanger tube 10. The heat transfer efficiency of the fluid is high in the turbulent flow region, but it requires high fluid dynamics and can cause significant local pressure fluctuations and mechanical stress. In this embodiment, by integrating the variable-diameter pipe section 12 and the main pipe section 11, the heat transfer efficiency, local pressure fluctuations, and mechanical stress of the heat exchanger tube 10 are balanced, making it highly practical.

[0054] In one specific embodiment, the diameter portion 121 and the diameter-reducing portion 122 of the same reducing pipe section 12 are coaxially arranged. That is, the reducing pipe sections 12 in this embodiment are all straight pipes. Compared with setting the reducing pipe section 12 in a bend, the turbulence formed in the straight pipe of the reducing pipe section 12 is more stable and more evenly distributed within the reducing pipe section 12, which is suitable for systems that precisely control flow rate and pressure distribution.

[0055] The principle by which the variable-diameter pipe section 12 generates turbulence in this embodiment differs from that of a bend. In this embodiment, the variable-diameter pipe section 12 generates turbulence by changing the cross-sectional area between adjacent diameter sections 121, creating a pressure difference between them. In contrast, a bend generates turbulence by changing its own shape, rather than by altering the cross-sectional area of ​​the variable-diameter pipe section 12.

[0056] In this embodiment, the heat exchange tubes 10 of the condenser coil 100 are all circular tubes, and the main pipe section 11 and the reducing pipe section 12 on the heat exchange tube 10 are also circular tube sections. Circular tubes have high pressure resistance and strong resistance to mechanical damage, making them suitable for the condenser coil 100 of the condenser. Alternatively, the heat exchange tubes 10 of the condenser coil 100 can also be all flat tubes, with the main pipe section 11 and the reducing pipe section 12 on the heat exchange tube 10 being flat tubes. Flat tubes offer advantages such as excellent air-side performance, guiding fluid laminar flow, compact structure, and high space utilization.

[0057] Of course, the formation of the turbulent region is not limited to the use of the variable diameter pipe section 12. In one specific embodiment, the main pipe section 11 is provided with a flow-turbulence element (not shown). The flow-turbulence element can be a spiral blade, a mesh, or a baffle. The spiral blade, mesh, or baffle forces the fluid to generate more shear and vortices, thereby enhancing the degree of turbulence.

[0058] By installing a flow-disrupting element in the main pipe section 11, the laminar flow region of the main pipe section 11 can be transformed into a turbulent flow region without modifying the existing DC pipe section 11 itself, thereby improving the heat exchange efficiency of the heat exchange tube 10 and reducing the modification cost.

[0059] Please refer to it again. Figure 1 Both end plates 20 have mounting holes adapted to the heat exchange tube 10, which are used to fix the position of the heat exchange tube 10. The diameter of the mounting holes can be configured to be slightly smaller than the outer diameter of both ends of the heat exchange tube 10 so that the heat exchange tube 10 and the end plate 20 form an interference fit.

[0060] Two or more baffles are arranged inside the end plate 20 along the direction of the heat exchange tubes 10. The baffles form two or more independent cavities within the short plate. The heat exchange tubes 10 are inserted into the same cavity, thereby keeping the heat exchange tubes 10 in parallel and avoiding local crossflow caused by flow deviation.

[0061] Please see Figures 1-5 The second aspect of this utility model provides a condenser, including the condenser coil 100 of any of the above embodiments.

[0062] The condenser of this utility model, by employing the condenser coil 100 of any of the above embodiments, provides a variable diameter section 12 on the heat exchange tube 10. The variable diameter section 12 of the heat exchange tube 10 has alternating diameter portions 121 and two or more variable diameter portions 122. The variable diameter portions 122 are arranged at intervals so that each variable diameter portion 122 bears a portion of the pressure fluctuation and mechanical stress, thereby dispersing the pressure fluctuation and mechanical stress at the diameter change point, so as to improve the stability and service life of the heat exchange tube 10. As a result, the overall stability of the condenser coil 100 is good and the service life is long, which in turn improves the stability and service life of the condenser.

[0063] In one specific embodiment, the condenser further includes an adjustable fan system and multiple sensors, the adjustable fan system being electrically connected to the multiple sensors. The adjustable fan system includes a control module and a fan, the control module being electrically connected to the fan.

[0064] The adjustable fan system is located on top of the condenser bracket, and the fan's outlet direction is downward, i.e., towards the location of the condenser coil 100. Multiple sensors can be one or more of the following: temperature sensor, humidity sensor, hazardous gas sensor, and particulate matter sensor.

[0065] The temperature sensor is positioned between two adjacent fins. Fins are existing technology in the condenser field and will not be discussed further here.

[0066] Multiple sensors acquire detection data; for example, a temperature sensor acquires temperature data, and a humidity sensor acquires humidity data. The control module controls the fan to adjust the airflow based on the acquired detection data.

[0067] For example, the control module controls the fan to adjust the air volume based on the acquired detection data, including: when the real-time temperature acquired by the temperature sensor is greater than the temperature threshold, the fan increases the air volume as needed; when the real-time temperature acquired by the temperature sensor is less than the temperature threshold, the fan decreases the air volume as needed.

[0068] In this embodiment, the adjustable fan system and various sensors work together to infinitely adjust the speed of the fan according to the actual operating conditions of the condenser, thereby improving the overall energy-saving effect of the condenser.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom still fall within the protection scope of this invention.

Claims

1. A condenser coil, characterized in that, include: A heat exchange tube, the heat exchange tube comprising a main tube section and a variable diameter tube section that are interconnected, the variable diameter tube section comprising at least one diameter section and two or more diameter sections, the two or more diameter sections and the at least one diameter section being distributed alternately; Two end plates are provided, spaced apart from each other, and both ends of the heat exchange tube are connected to the end plates.

2. The condenser coil according to claim 1, characterized in that, The inner diameter of the variable-diameter pipe section decreases in a stepwise manner.

3. The condenser coil according to claim 2, characterized in that, The inner diameter of the variable diameter pipe section increases as the distance between the main pipe section and one end of the heat exchange tube decreases.

4. The condenser coil according to claim 3, characterized in that, Each heat exchange tube is provided with two variable diameter tube sections, which are respectively located at the input end and the output end of the main tube section.

5. The condenser coil according to claim 1, characterized in that, The diameter portion and the diameter-reducing portion of the same variable-diameter pipe section are coaxially arranged.

6. The condenser coil according to claim 1, characterized in that, The inner wall of the variable diameter section is coated with a hydrophobic layer.

7. The condenser coil according to any one of claims 1 to 6, characterized in that, A turbulent flow region is formed within the variable diameter pipe section, while a laminar flow region is formed within the main pipe section.

8. The condensing coil according to any one of claims 1 to 6, characterized in that, The end plate is provided with an inlet manifold and an outlet manifold. Fluid enters the heat exchange tube through the inlet manifold and leaves the heat exchange tube through the outlet manifold.

9. A condenser, characterized in that, Includes the condenser coil as described in any one of claims 1 to 8.

10. The condenser according to claim 9, characterized in that, It also includes an adjustable fan system and a variety of temperature sensors. The adjustable fan system includes a fan and a control module, and the control module is electrically connected to the fan and the various temperature sensors respectively.

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