A lower-dense and upper-sparse double-helical fin heat exchanger

Abstract

The present invention belongs to the technical field of heat exchangers, and in particular relates to a double-helix fin heat exchanger with dense lower part and sparse upper part, which includes multiple central tubes connected to each other. A capillary pipeline is wound around the central tubes, and a cold fluid flows in the capillary pipeline. Heat dissipation fins are evenly arranged on the capillary pipeline. The capillary pipeline is wound around the central tube, and the number of spiral turns at the lower end is dense while the number of spiral turns at the upper end is sparse. A housing is wrapped outside the central tube, and a flowing liquid is filled in the housing. A first through pipe is connected between multiple housings in a head-to-tail connection manner. The advantages are as follows: The purpose of the present invention is to better improve the heat exchange efficiency of energy, and at the same time solve the problem of excessive aggregation of part of the heat, thereby better improving the working efficiency of the heat exchanger.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchangers, and particularly relates to a double - helix fin heat exchanger with dense lower part and sparse upper part. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. That is, water or other media are filled in a large closed container, and there are pipes passing through the container. Hot water flows through the pipes. Due to the temperature difference between the hot water in the pipes and the cold and hot water in the container, heat exchange will occur, which is the heat balance in junior high school physics. The heat of a high - temperature object always transfers to a low - temperature object, so the heat of the water in the pipes is exchanged to the cold water in the container.

[0003] Using the interaction of energy to achieve the transfer and change of the entropy value of an object, thereby achieving the purpose of interaction and heat exchange. The fins used in traditional heat exchangers have good heat - exchange efficiency, but they cannot work effectively for a long time during operation. Therefore, a layout with a dense lower part and a sparse upper part is adopted, but this method also has disadvantages. First, the heat - exchange efficiency is insufficient. Second, in some overly dense layouts, local heat is likely to accumulate and cannot be dissipated, resulting in a failure to perform heat - exchange operations better.

[0004] Therefore, we propose a double - helix fin heat exchanger with dense lower part and sparse upper part to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a double - helix fin heat exchanger with dense lower part and sparse upper part that can improve the working efficiency of the heat exchanger for the above - mentioned problems.

[0006] To achieve the above - mentioned purpose, the present invention adopts the following technical solutions: A double - helix fin heat exchanger with dense lower part and sparse upper part includes multiple central tubes that are connected to each other. A capillary pipeline is wound around the central tubes, and a cold fluid flows in the capillary pipeline. Heat - dissipating fins are evenly arranged on the capillary pipeline. The capillary pipeline is wound around the central tube, with a dense number of spiral turns at the lower end and a sparse number of spiral turns at the upper end. A housing is wrapped outside the central tube, and a flowing liquid is filled in the housing. The multiple housings are connected by a first through - tube in a head - to - tail connection manner.

[0007] In the above - mentioned double - helix fin heat exchanger with dense lower part and sparse upper part, multiple contact panels are fixedly connected to the inner wall of the central tube. The contact panels are evenly distributed on the inner wall of the central tube and are in a wedge shape.

[0008] In the above - mentioned double - helix fin heat exchanger with dense lower part and sparse upper part, the capillary pipeline is connected to the outer wall of the central tube by direct welding, and the mutually bonded area is between 15% and 50%.

[0009] In the above-mentioned lower-dense and upper-sparse double-helical fin heat exchanger, the heat dissipation fins are in a horn shape, and the roots of multiple heat dissipation fins are evenly connected to the capillary pipeline. The horn-shaped diffusion parts are stacked together. The outer wall of the horn-shaped diffusion part of the heat dissipation fin is disconnected at the connection of the capillary pipeline and the central pipe, and the outer wall of the heat dissipation fin and the central pipe do not contact each other.

[0010] In the above-mentioned lower-dense and upper-sparse double-helical fin heat exchanger, a plurality of through drainage holes are formed in the horn-shaped diffusion part of the heat dissipation fin.

[0011] In the above-mentioned lower-dense and upper-sparse double-helical fin heat exchanger, a break is provided on the central pipe, and a transmission mechanism is provided in the break. The transmission mechanism includes a rotating ring, inner blades and outer blades. The inner blades are arranged on the inner wall of the rotating ring, and the outer blades are fixedly connected to the outer wall of the rotating ring.

[0012] In the above-mentioned lower-dense and upper-sparse double-helical fin heat exchanger, the whole of the heat dissipation fin is arranged in a hollow shape. A plurality of the heat dissipation fins are communicated with each other through a bridging channel. A second through pipe is provided between a plurality of the casing shells for connecting the heat dissipation fins between the plurality of casing shells and communicating them.

[0013] In the above-mentioned lower-dense and upper-sparse double-helical fin heat exchanger, one end of the bridging channel is connected to the root of one heat dissipation fin, and the other end of the bridging channel is connected to the top of another heat dissipation fin.

[0014] In the above-mentioned lower-dense and upper-sparse double-helical fin heat exchanger, a plurality of concave pits are evenly provided on the inner wall of the casing shell.

[0015] In the above-mentioned lower-dense and upper-sparse double-helical fin heat exchanger, a plurality of fins are fixedly connected in the concave pits, and the ends of the fins do not exceed the depth of the concave pits.

[0016] Compared with the existing technology, the advantages of the present lower-dense and upper-sparse double-helical fin heat exchanger are as follows:

[0017] 1. By means of the cooperation of the capillary pipeline, the heat dissipation fins and the central pipe provided in the present invention, the horn-shaped heat dissipation fins are used to replace the traditional spiral heat exchange fins, so that more effective heat exchange working surfaces can be obtained in a unit space. Therefore, while obtaining a larger heat exchange area, the heat exchange efficiency is effectively improved, and it is more efficient than the traditional spiral heat exchange fins.

[0018] 2. Through the cooperation of the first through pipe, the second through pipe and the housing provided in the present invention, the self-flowing liquid in the housing can fully enter between multiple heat dissipation fins, achieving the effect of direct energy contact and conversion, effectively solving the problem of excessive heat accumulation caused by the structural design. In addition, due to the application of the linkage setting, external power is not required for driving, so that the internal liquid can better perform energy interaction and transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is an external structural schematic diagram of a lower-dense and upper-sparse double-helical fin heat exchanger provided by the present invention;

[0020] Figure 2 is Figure 1 a schematic structural diagram of the contact panel in

[0021] Figure 3 is Figure 1 a schematic connection diagram of the central axis pipe and the capillary pipeline in

[0022] Figure 4 is Figure 3 a schematic combination diagram of the heat dissipation fins in

[0023] Figure 5 is Figure 4 a perspective view of the heat dissipation fins in

[0024] Figure 6 is Figure 3 a schematic single-piece structure diagram of the heat dissipation fins;

[0025] Figure 7 is Figure 2 a schematic structural diagram of the transmission mechanism in

[0026] Figure 8 is Figure 1 a side cross-sectional view of the pit in

[0027] Figure 9 FIG. is a schematic heat flow aggregation comparison diagram of a lower-dense and upper-sparse double-helical fin heat exchanger provided by the present invention.

[0028] In the figure, 1 is the central axis pipe, 2 is the capillary pipeline, 3 is the heat dissipation fin, 4 is the housing, 5 is the first through pipe, 6 is the contact panel, 7 is the drainage hole, 8 is the transmission mechanism, 9 is the rotating ring, 10 is the inner blade, 11 is the outer blade, 12 is the bridging channel, 13 is the second through pipe, 14 is the pit, and 15 is the fin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Embodiment

[0030] AsFigure 1-2 As shown in the figure, a double-helix fin heat exchanger with a dense bottom and sparse top includes multiple axial tubes 1. The axial tubes 1 are used to connect external energy conversion devices, and the traditional sealing ring and nut fastening method is adopted at the butt joint ports, so as to facilitate conventional disassembly and docking. In this solution, only a partial schematic diagram of the axial tube 1 is intercepted, and the final port part is not shown. The multiple axial tubes 1 are connected to each other and are connected in a bent arc shape. Multiple contact panels 6 are fixedly connected to the inner wall of the axial tube 1. The contact panels 6 are made of the same material as the axial tube 1, and their roots are fixedly connected to the inner wall of the axial tube 1. The contact panels 6 are evenly distributed on the inner wall of the axial tube 1. The contact panels 6 are vertically arranged, so as to prevent the influence on the flow of the internal liquid to the greatest extent, and are in a wedge shape for further reinforcement. It should be noted that the purpose of the contact panels 6 is to increase the inner wall area of the axial tube 1, so that it can be further docked with the internal fluid and make more sufficient contact for energy conversion. Therefore, its length and size can be customized according to requirements, and they are not specifically limited in this solution. In addition, the whole of the contact panels 6 is discontinuous, and the middle part can be arbitrarily disconnected or partially connected.

[0031] As Figure 3-4 shown in the figure, a capillary pipeline 2 is wound around the axial tube 1. The capillary pipeline 2 is arranged around the axial tube 1 in a spiral winding manner. The capillary pipeline 2 is wound around the axial tube 1, and the number of spiral turns at the lower end is dense, while the number of spiral turns at the upper end is sparse. The spiral pitch adopted by the capillary pipeline 2 is an equivalent distance: the length ratio is 1.2:1. It should be noted that the spiral pitch does not necessarily need to be set according to a linear ratio. The above effects can be achieved by using a non-linear spiral design. The given corresponding ratio is the best experimental ratio, not the only linear ratio. Its upper end is distributed in a scientific dense and sparse manner to the greatest extent. Cold fluid or the fluid in the corresponding axial tube 1 flows in the capillary pipeline 2, which is used to directly contact the axial tube 1 for energy conversion operation. The capillary pipeline 2 is connected to the outer wall of the axial tube 1 by direct welding. Compared with the traditional winding method, welding has the advantages of good firmness and a large contact area of the contact points, so as to better carry out the heat exchange operation. The mutually bonded area is between 15% and 50%, which fully ensures the direct contact area for heat exchange.

[0032] Radiating fins 3 are evenly arranged on the capillary pipeline 2. The radiating fins 3 are in a horn shape or a similar horn shape, mainly showing an outward expansion in a fixed direction. Its bottom converges, the end expands, and the middle part has a waist. And multiple radiating fins 3 are evenly connected to the capillary pipeline 2 at the root. The ratio of the length of the outer expansion end to the connection distance of multiple radiating fins 3 is 4:1. The root of the radiating fin 3 is wrapped inside the outer expansion end of the previous one or more radiating fins 3. The horn-shaped diffusion parts are stacked together in a blooming shape. Compared with the traditional fins, this method effectively increases the heat exchange area.

[0033] As shown Figure 6 in the figure, the outer wall of the horn-shaped diffusing part of the heat dissipation fin 3 is disconnected at the connection between the capillary tube 2 and the central axis tube 1, and the outer walls of the heat dissipation fin 3 and the central axis tube 1 do not contact each other. The disconnected part is on the side, so that the horn-shaped outward diffusing part cannot be closed together. This part is used to accommodate the contact between the capillary tube 2 and the central axis tube 1.

[0034] As shown Figure 9 in the figure, it can be seen from the figure that in terms of the transducer for temperature, the limit and duration of the transducer are significantly different. Due to the effect of the sheet fins, it generally can only achieve normal efficiency, and the limit envelope is relatively low. While for the helical setting method with denser upper part and sparser lower part, it has obvious advantages, that is, the limit can be further lowered, but there is still a bottleneck. The bottleneck is that the local density is too high, resulting in the inability to sustain the transducer, so the best effect is not achieved. However, it can be seen from the solution of this embodiment that it has a better limit compared with the previous two, and at the same time, the efficiency is also better improved and can be sustained.

[0035] As shown Figure 5-6 in the figure, a plurality of through drainage holes 7 are provided on the horn-shaped diffusing part of the heat dissipation fin 3. The function of the drainage holes 7 is to further eliminate the heat accumulation effect. In Figure 9 this case, it is necessary to utilize the reflux liquid in the housing 4 to fill the dense root aggregation area in contact with the heat dissipation fin 3, and the function of the drainage holes 7 is to further diffuse the reflux liquid to the inside. The whole heat dissipation fin 3 is arranged in a hollow shape, and the hollow shape is used to further transduce the internal heat energy. A plurality of heat dissipation fins 3 are interconnected through a bridging channel 12 for the connection between multiple channels. One end of the bridging channel 12 is connected to the root of one heat dissipation fin 3, and the other end of the bridging channel 12 is connected to the top of another heat dissipation fin 3 to form a continuous cavity.

[0036] As shown Figure 7As shown in the figure, a second connecting pipe 13 is provided between multiple housing cases 4 for connecting the heat dissipation fins 3 between the multiple housing cases 4 and communicating with each other. A break is provided on the axial center pipe 1, and a transmission mechanism 8 is provided in the break. The transmission mechanism 8 is applied to the axial center pipe 1 and the second connecting pipe 13, and has the same function. Both drive the fluid / gas in the corresponding component to advance through the driving force of the fluid, and adopt a multiple energy conversion method, which greatly accelerates the energy conversion effect and saves the occupied space. The transmission mechanism 8 includes a rotating ring 9, inner blades 10 and outer blades 11. The inner blades 10 are arranged on the inner wall of the rotating ring 9, and the outer blades 11 are fixedly connected to the outer wall of the rotating ring 9. The inner blades 10 are forced to push the rotating ring 9 to move, and then push the outer blades 11, thereby driving the fluid in the housing case 4 to move. Subsequently, through the movement of this part of the fluid, the air flow in the second connecting pipe 13 is driven to achieve the energy conversion effect. The axial center pipe 1 is wrapped by the housing case 4, and the housing case 4 is filled with flowing liquid. The multiple housing cases 4 are connected by a first connecting pipe 5 in a head-to-tail connection manner.

[0037] As Figure 8 shown in the figure, a plurality of concave pits 14 are evenly provided on the inner wall of the housing case 4. A plurality of fins 15 are fixedly connected in the concave pits 14. The end portions of the fins 15 do not exceed the depth of the concave pits 14. The concave pits 14 on the housing case 4 expand its surface area. Therefore, in cooperation with the fins 15, the surface area of the housing case 4 is effectively increased, and the energy conversion efficiency is further improved.

[0038] Although terms such as axial center pipe 1, capillary pipeline 2, heat dissipation fin 3, housing case 4, first connecting pipe 5, contact panel 6, drainage hole 7, transmission mechanism 8, rotating ring 9, inner blade 10, outer blade 11, bridging channel 12, second connecting pipe 13, concave pit 14, fin 15, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A double-helix fin heat exchanger with dense lower part and sparse upper part, comprising a plurality of axial tubes (1), and the plurality of axial tubes (1) are connected to each other. It is characterized in that, A capillary pipeline (2) is wound around the central axis pipe (1). A cold fluid flows in the capillary pipeline (2). Heat dissipation fins (3) are evenly arranged on the capillary pipeline (2). The capillary pipeline (2) is wound around the central axis pipe (1), and the number of spiral turns at the lower end is dense, while the number of spiral turns at the upper end is sparse. The outer surface of the central axis pipe (1) is wrapped with a housing (4). A flowing liquid is filled in the housing (4). A first through pipe (5) is connected between multiple housings (4) in a head-to-tail connection manner; A plurality of contact panels (6) are fixedly connected to the inner wall of the central axis pipe (1). The contact panels (6) are evenly distributed on the inner wall of the central axis pipe (1) and are in a wedge shape; The capillary pipeline (2) is connected to the outer wall of the central axis pipe (1) by direct welding, and the mutually bonded area is between 15% and 50%; The heat dissipation fins (3) are in a horn shape, and the roots of multiple heat dissipation fins (3) are evenly connected to the capillary pipeline (2). The horn-shaped diffusion parts are stacked together. The outer wall of the horn-shaped diffusion part of the heat dissipation fins (3) is disconnected at the connection between the capillary pipeline (2) and the central axis pipe (1), and the heat dissipation fins (3) do not contact the outer wall of the central axis pipe (1); A plurality of through drainage holes (7) are formed in the horn-shaped diffusion part of the heat dissipation fins (3); A break is provided on the central axis pipe (1), and a transmission mechanism (8) is arranged in the break. The transmission mechanism (8) includes a rotating ring (9), inner blades (10) and outer blades (11). The inner blades (10) are arranged on the inner wall of the rotating ring (9), and the outer blades (11) are fixedly connected to the outer wall of the rotating ring (9). The whole of the heat dissipation fins (3) is in a hollow shape. Multiple heat dissipation fins (3) are communicated with each other through a bridging channel (12). A second through pipe (13) is arranged between multiple housings (4) to connect the heat dissipation fins (3) between multiple housings (4).

2. The lower-dense and upper-sparse double-helical fin heat exchanger according to claim 1, wherein One end of the bridging channel (12) is connected to the root of one heat dissipation fin (3), and the other end of the bridging channel (12) is connected to the top of another heat dissipation fin (3).

3. The double-helix fin heat exchanger with lower density and upper density as claimed in claim 1, wherein A plurality of concave pits (14) are evenly arranged on the inner wall of the housing (4).

4. The lower-dense and upper-sparse double-helical fin heat exchanger according to claim 3, characterized in that, A plurality of fins (15) are fixedly connected in the concave pits (14), and the ends of the fins (15) do not exceed the depth of the concave pits (14).

Images