Multi-pipe diameter coil heat exchanger
Patent Information
- Application Number
- CN202522108110.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-09-29
AI Technical Summary
[0003]盘管式换热器是众多换热器形式中的一种，而目前传统的螺旋盘管式换热器多采用单层螺旋盘管结构，其制造虽然简便，但由于单层螺旋盘管的换热面积有限，若要增强换热能力，通常需增加盘管长度，但这会又导致设备体积增大、安装空间受限
[0015]本实用新型的有益效果主要体现在：相对于传统的螺旋盘管换热器来说，本实用新型提供的多管径盘管换热器，在维持原有体积的情况下，进一步加大了盘管的行程，增大了换热面积，并且也提升了换热效率。
Smart Images
Figure CN224905780U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger equipment technology, specifically to a multi-diameter coil heat exchanger. Background Technology
[0002] Heat exchangers, as key equipment for heat transfer between materials, are widely used in chemical, petroleum, power, food and other industrial fields. Their core function is to transfer part of the heat of hot fluids to cold fluids to meet the needs of heating, cooling, condensation and evaporation in the process, which is crucial for improving energy efficiency.
[0003] Coil heat exchangers are one of many types of heat exchangers. Currently, most traditional spiral coil heat exchangers use a single-layer spiral coil structure. Although it is easy to manufacture, the heat exchange area of a single-layer spiral coil is limited. To enhance the heat exchange capacity, the length of the coil usually needs to be increased, which will lead to an increase in equipment size and limited installation space.
[0004] Therefore, it is necessary to improve upon existing technologies and provide a multi-diameter coil heat exchanger that enhances heat exchange efficiency. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a multi-diameter coil heat exchanger with higher heat exchange efficiency.
[0006] To solve the above-mentioned technical problems, the technical solution used in this utility model is: a multi-diameter coil heat exchanger, characterized in that: it includes a shell, an inner coil, and an outer coil; a heat exchange cavity is formed inside the shell, and both the inner coil and the outer coil are located inside the heat exchange cavity; the outer coil is sleeved on the outside of the inner coil, and there is a gap between the outer coil and the inner coil for medium to flow through; a medium inlet pipe and a medium outlet pipe are provided on the shell, the medium inlet pipe is connected to the inner coil, the medium outlet pipe is connected to the outer coil, and the inner coil and the outer coil are connected in series.
[0007] Preferably, it further includes an intermediate coil located between the inner coil and the outer coil. The intermediate coil is connected in parallel with the outer coil and then in series with the inner coil. The medium inlet pipe is connected to the inlet of the inner coil, and the outlet of the inner coil is connected to the inlet of the intermediate coil and the inlet of the outer coil, respectively. The outlet of the intermediate coil and the outlet of the outer coil are both connected to the medium outlet pipe.
[0008] Preferably, the system further includes a branch pipe and a manifold. The branch pipe has a first interface, a second interface, and a third interface that are connected in series. The first interface is connected to the outlet of the inner coil, and the second and third interfaces are connected to the inlets of the intermediate coil and the outer coil, respectively. The manifold has a fourth interface, a fifth interface, and a sixth interface that are connected in series. The fourth and fifth interfaces are connected to the outlets of the intermediate coil and the outer coil, respectively, and the sixth interface is connected to the medium outlet pipe.
[0009] Preferably, the intermediate coil and the outer coil have the same diameter.
[0010] Preferably, the diameter of the inner coil is smaller than the diameter of the outer coil.
[0011] Preferably, a spiral guide vane is provided inside the inner coil, the spiral guide vane extending along the length of the inner coil, and the spiral guide vane is used to disturb the heat exchange medium inside the inner coil.
[0012] Preferably, the spiral guide vane and the inner coil are integrally formed.
[0013] Preferably, the pitch of the spiral guide vane is 10-25 mm.
[0014] Preferably, the thickness of the spiral guide vane gradually decreases from its connection point with the inner wall of the inner coil towards the axis of the inner coil.
[0015] The beneficial effects of this utility model are mainly reflected in the following aspects: Compared with the traditional spiral coil heat exchanger, the multi-diameter coil heat exchanger provided by this utility model further increases the coil stroke, increases the heat exchange area, and improves the heat exchange efficiency while maintaining the original volume. Attached Figure Description
[0016] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.
[0017] Figure 1 This is a schematic diagram of the overall structure of the heat exchanger in this utility model;
[0018] Figure 2 This is an exploded structural diagram of the heat exchanger in this utility model;
[0019] Figure 3 This is a cross-sectional structural diagram of the heat exchanger in this utility model;
[0020] Figure 4This is a top view of the heat exchange coil in this utility model.
[0021] Figure 5 This is a bottom view of the heat exchange coil structure in this utility model;
[0022] Figure 6 This is a partial cross-sectional first-view structural schematic diagram of the inner coil in this utility model;
[0023] Figure 7 This is a partial cross-sectional second-view structural schematic diagram of the inner coil in this utility model;
[0024] In the figure: shell 1, heat exchange chamber 10, water inlet 11, water outlet 12, medium inlet pipe 13, medium outlet pipe 14, inner coil 2, spiral guide vane 20, outer coil 3, intermediate coil 4, branch pipe 5, first interface 50, second interface 51, third interface 52, manifold 6, fourth interface 60, fifth interface 61, sixth interface 62. Detailed Implementation
[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.
[0026] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0028] refer to Figure 1-7 This utility model provides a multi-diameter coil heat exchanger, including a shell 1, an inner coil 2, and an outer coil 3; a heat exchange cavity 10 is formed inside the shell 1, and heat exchange is achieved between the heat exchange cavity 10 and the coil by circulating media of different temperatures. The inner coil 2 and the outer coil 3 are both located inside the heat exchange cavity 10, and the outer coil 3 is sleeved on the outside of the inner coil 2, and there is a gap between the outer coil 3 and the inner coil 2 for the media (such as refrigerant or heat medium) to flow through; a medium inlet pipe 13 and a medium outlet pipe 14 are provided on the shell 1, the medium inlet pipe 13 is connected to the inner coil 2, the medium outlet pipe 14 is connected to the outer coil 3, and the inner coil 2 and the outer coil 3 are connected in series.
[0029] The multi-diameter coil heat exchanger provided by this utility model works as follows: the heat exchange medium (such as refrigerant) enters the inner coil 2 through the medium inlet pipe 13, flows through the inner coil 2 and then through the outer coil 3, and finally flows out through the medium outlet pipe 14. Simultaneously, the shell 1 has an inlet 11 and an outlet 12 connected to the heat exchange chamber 10. The inlet 11 and outlet 12 are located on the side of the shell 1 and are spaced apart along the height of the shell 1. Water enters the heat exchange chamber 10 through the inlet 11 and flows towards the outlet 12. During the flow, the water in the heat exchange chamber 10 exchanges heat with the heat exchange medium in the coil, thereby achieving the heat exchange effect. Compared with traditional spiral coil heat exchangers, the heat exchanger of this utility model, while maintaining the original volume, further increases the coil stroke, increases the heat exchange area, and also improves the heat exchange efficiency.
[0030] In this embodiment, the positions of the medium inlet pipe and the medium outlet pipe can be interchanged. For example, the medium inlet pipe can be connected to the outer coil, and the medium outlet pipe can be connected to the inner coil. Furthermore, the diameter of the inner coil is smaller than that of the outer coil. In this case, the heat exchange medium flows from the outer coil into the inner coil and out through the outer coil. This is suitable when heating is required. Gaseous refrigerant can be introduced into the outer coil through the medium inlet pipe, and the condensate formed after heat exchange can be discharged through the smaller-diameter inner coil, effectively ensuring that the discharged refrigerant is in a liquid state to achieve sufficient heat exchange.
[0031] When the heat exchange medium flows in from the inner coil and out from the outer coil, it is suitable for situations requiring refrigeration. That is, the liquid heat exchange medium can flow in through the inner coil with a small diameter, and the evaporated gas formed after heat exchange can be discharged from the outer coil with a relatively large diameter.
[0032] In a preferred embodiment, an intermediate coil 4 is also included. The intermediate coil 4 is located between the inner coil 2 and the outer coil 3. The intermediate coil 4 and the outer coil 3 are connected in parallel and then connected in series with the inner coil 2. The medium inlet pipe 13 is connected to the inlet of the inner coil 2, and the outlet of the inner coil 2 is connected to the inlet of the intermediate coil 4 and the inlet of the outer coil 3, respectively. The outlet of the intermediate coil 4 and the outlet of the outer coil 3 are connected together to the medium outlet pipe 14. That is, in this embodiment, by adding an intermediate coil 4, the intermediate coil 4 is connected in parallel with the outer coil 3 and then connected in series with the inner coil 2 to merge together. The specific flow path of the medium is as follows: after the medium flows into the inner coil 2 from the medium inlet pipe 13, it is divided into two fluids at the outlet of the inner coil 2. One fluid enters the intermediate coil 4 and flows along the stroke of the intermediate coil 4, and the other fluid enters the outer coil 3 and flows along the stroke of the outer coil 3. Finally, the two fluids merge into the medium outlet pipe 14 and then flow out. This greatly increases the flow path of the medium, while also increasing the heat exchange area and reducing the pressure during the flow of the medium.
[0033] refer to Figure 2 ,4 5. In a preferred embodiment, the system further includes a branch pipe 5 and a manifold 6. The branch pipe 5 has a first interface 50, a second interface 51, and a third interface 52 that are interconnected. The first interface 50 is connected to the outlet of the inner coil 2, and the second interface 51 and the third interface 52 are respectively connected to the inlets of the intermediate coil 4 and the outer coil 3. The manifold 6 has a fourth interface 60, a fifth interface 61, and a sixth interface 62 that are interconnected. The fourth interface 60 and the fifth interface 61 are respectively connected to the outlets of the intermediate coil 4 and the outer coil 3, and the sixth interface 62 is connected to the medium outlet pipe 14. In this embodiment, the branch pipe 5 and the manifold 6 are similar to a tee pipe, that is, they have three interconnected channels. The diverter 5 connects the outlet of the inner coil 2 to the inlets of the outer coil 3 and the intermediate coil 4, allowing the medium flowing in from the medium inlet pipe 13 to flow through the inner coil 2 to the outer coil 3 and the intermediate coil 4 respectively. Furthermore, the manifold 6 connects the outlets of the outer coil 3 and the intermediate coil 4 to the medium outlet pipe 14, allowing the two streams of fluid flowing to the outer coil 3 and the intermediate coil 4 to converge through the manifold 6 and then be discharged through the medium outlet pipe 14. This flow path of the heat exchange medium is more suitable for cooling applications. When heating is required, the flow path of the heat exchange medium can be changed so that it first enters the intermediate coil and the outer coil through the manifold. This effectively reduces pressure loss, and the condensate formed after heat exchange is then discharged through the inner coil and the medium outlet pipe, thereby improving the heat exchange efficiency.
[0034] refer to Figure 3 In a preferred embodiment, the intermediate coil 4 and the outer coil 3 have the same diameter (meaning both the outer and inner diameters of the intermediate coil 4 and the outer coil 3 are the same). Since the intermediate coil 4 and the outer coil 3 are connected in parallel, using the same diameter ensures that the resistance of the flow through the two coils is similar, thereby achieving a uniform flow distribution. This avoids the situation where different diameters cause different resistances, and the fluid may tend to flow along the path with less resistance, leading to uneven flow distribution.
[0035] refer to Figure 3 In a preferred embodiment, the diameter of the inner coil 2 is smaller than that of the outer coil 3. That is, the outer diameter of the inner coil 2 is smaller than that of the outer coil 3, and the inner diameter of the inner coil 2 is also smaller than that of the outer coil 3. This can increase the flow velocity of the medium during the flow process. At the same time, the smaller diameter of the inner coil 2 can also reduce the overall volume of the heat exchange coil, making the structural design more compact.
[0036] refer to Figure 6 and 7In a preferred embodiment, a spiral guide vane 20 is provided inside the inner coil 2. The spiral guide vane 20 extends along the length of the inner coil 2. The spiral guide vane 20 is used to disturb the heat exchange medium inside the inner coil 2, thereby improving the heat exchange effect and helping to improve the heat exchange efficiency.
[0037] In a preferred embodiment, the spiral guide vane 20 and the inner coil 2 are integrally formed to improve the overall strength between the spiral guide vane 20 and the inner coil 2.
[0038] refer to Figure 7 In a preferred embodiment, the pitch of the spiral guide vane 20 is 10-25 mm. In this embodiment, the pitch is the distance the spiral guide vane 20 travels after one revolution, i.e. Figure 7 The distance shown in D, by controlling the pitch between 10-25 mm, allows the guide vanes to achieve better flow turbulence without causing excessive flow resistance. Specifically, the pitch can be 10 mm, 15 mm, 20 mm, or 25 mm. A pitch that is too small may cause excessive turbulence during medium flow, resulting in a strong impact sensation, while a pitch that is too large may lead to insignificant flow turbulence.
[0039] In a preferred embodiment, the thickness of the spiral guide vane 20 gradually decreases from its connection point with the inner wall of the inner coil 2 towards the axis of the inner coil 2. That is, the thickness of the spiral guide vane 20 near the inner wall of the inner coil 2 is greater than the thickness away from the inner wall. It can also be understood that the spiral guide vane 20 becomes thinner towards the axis of the inner coil 2 (or the center of the spiral). The purpose of this design is to improve the connection stability and strength between the spiral guide vane 20 and the inner wall of the inner coil 2 by making the guide vane relatively thicker near the inner wall, thus preventing breakage. The thinner thickness near the axis reduces resistance to the fluid, allowing the fluid to flow more smoothly along the direction of the guide vane and better guiding the fluid to rotate during flow, which is more conducive to improving heat exchange efficiency.
[0040] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A multi-diameter coil heat exchanger, characterized in that: The device includes a shell, an inner coil, and an outer coil. A heat exchange cavity is formed inside the shell, and both the inner and outer coils are located inside the heat exchange cavity. The outer coil is sleeved on the outside of the inner coil, and there is a gap between the outer coil and the inner coil for medium to flow through. A medium inlet pipe and a medium outlet pipe are provided on the shell. The medium inlet pipe is connected to the inner coil, and the medium outlet pipe is connected to the outer coil. The inner and outer coils are connected in series.
2. The multi-diameter coil heat exchanger as described in claim 1, characterized in that, It also includes an intermediate coil, which is located between the inner coil and the outer coil. The intermediate coil and the outer coil are connected in parallel and then connected in series with the inner coil. The medium inlet pipe is connected to the inlet of the inner coil, and the outlet of the inner coil is connected to the inlet of the intermediate coil and the inlet of the outer coil, respectively. The outlet of the intermediate coil and the outlet of the outer coil are both connected to the medium outlet pipe.
3. The multi-diameter coil heat exchanger as described in claim 2, characterized in that, It also includes a branch pipe and a manifold. The branch pipe has a first interface, a second interface, and a third interface that are connected to each other. The first interface is connected to the outlet of the inner coil, and the second and third interfaces are connected to the inlets of the intermediate coil and the outer coil, respectively. The manifold has a fourth interface, a fifth interface, and a sixth interface that are connected to each other. The fourth and fifth interfaces are connected to the outlets of the intermediate coil and the outer coil, respectively, and the sixth interface is connected to the medium outlet pipe.
4. The multi-diameter coil heat exchanger as described in claim 2, characterized in that, The intermediate coil has the same diameter as the outer coil.
5. The multi-diameter coil heat exchanger as described in claim 1, characterized in that, The diameter of the inner coil is smaller than the diameter of the outer coil.
6. The multi-diameter coil heat exchanger as described in claim 1, characterized in that, The inner coil is provided with a spiral guide vane that extends along the length of the inner coil and is used to agitate the heat exchange medium inside the inner coil.
7. The multi-diameter coil heat exchanger as described in claim 6, characterized in that, The spiral guide vane and the inner coil are integrally formed.
8. The multi-diameter coil heat exchanger as described in claim 6, characterized in that, The pitch of the spiral guide vane is 10-25 mm.
9. The multi-diameter coil heat exchanger as described in claim 6, characterized in that, The thickness of the spiral guide vane gradually decreases from its connection with the inner wall of the inner coil towards the axis of the inner coil.