Outer fin reinforced condenser pipe

Abstract

The utility model relates to an outer fin reinforced condenser pipe, which comprises a pipe body and outer fins, the outer fins are formed by extending materials on the pipe body along the radius direction of the pipe body and spirally extending on the outer surface of the pipe body around the pipe body, the outer fins and the pipe body are integrally formed, and the thicknesses of the two sides of each outer fin are gradually reduced outwards along the radius direction of the pipe body; a spiral channel is formed by a gap between every two adjacent outer fins; fin top grooves are formed in the top ends of the outer fins, and the fin top grooves are formed in the spiral extending direction of the outer fins at intervals; wing tips are arranged on the side edges of the outer fins, and the wing tips are arranged at intervals in the spiral extending direction of the outer fins; an internal thread rib integrally formed with the pipe body is arranged on the inner surface of the pipe body in a protruding mode. The sharp fin tips are additionally arranged on the outer fins, the surface tension of a liquid film of condensate is further damaged through the fin tip structures, the thickness of the liquid film is reduced, the heat resistance outside the pipe is reduced, meanwhile, the heat exchange area is effectively increased, and the heat exchange effect outside the pipe is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to condensing heat exchange technical field in air conditioner, refrigeration system, in particular to a kind of condensing pipe of outer fin enhancement type. BACKGROUND

[0002] In recent years, with the development of refrigeration and air conditioning technology, it promotes the continuous updating of heat exchanger manufacturing technology, and the design and manufacturing technology of heat exchanger tube for heat exchanger are also constantly updated and developed.

[0003] The water-cooled condenser used in centrifugal and screw refrigeration units is mainly a horizontal tube-shell heat exchanger. In the horizontal tube-shell condenser, the heat exchange tubes are arranged horizontally, and the refrigerant vapor condenses and exchanges heat outside the tube, forming a liquid film. The refrigerant gas is forced to condense on the outer surface of the liquid film, and the latent heat released must be transferred to the heat exchange tube through the liquid film. The existence of the condensation liquid film increases the heat transfer resistance, resulting in temperature difference loss and reducing the refrigeration efficiency, which affects the heat exchange performance of the heat exchange tube.

[0004] Therefore, in order to improve the heat exchange performance of the heat exchange tube, it is necessary to use heat transfer enhancement technology. In order to further improve the performance of the condensing heat exchanger, fins are formed on the outer surface of the heat exchange tube by machining, and gaps are pressed out at the top of the fins to form sawtooth-shaped fins. The sawtooth-shaped fins are used to thin the liquid film and promote the flow of the liquid film, while effectively increasing the heat exchange area, thereby improving the heat exchange effect. However, there is still room for improvement in further improving the heat exchange performance of the heat exchange tube. SUMMARY

[0005] The utility model aims at providing a kind of condensing pipe of outer fin enhancement type, improve the heat exchange efficiency of condenser in prior art.

[0006] To achieve the above object, the utility model employs the technical scheme of:

[0007] The utility model provides a kind of condensing pipe of outer fin enhancement type, including: tube body and by the material on the tube body extends along the radius direction of the tube body and on the outer surface of the tube body around the tube body and is formed with the tube body integrally formed outer fin, the thickness of the two sides of the outer fin gradually decreases along the radius direction of the tube body outward;The gap between adjacent two outer fins constitutes spiral channel;The top end of the outer fin is provided with fin top groove, and the fin top groove is interval arranged along the spiral extension direction of the outer fin;The inner surface of the tube body is provided with internally threaded rib integrally formed with the tube body.

[0008] Further, the fin tip is a sharp protrusion, and the sharp part of the sharp protrusion faces outward.

[0009] Further, the fin tip is arranged on one side or both sides of the outer fin.

[0010] Further, the fin tip is arranged on one side or both sides of the outer fin.

[0011] Further, the fin tip is arranged on one side or both sides of the outer fin.

[0012] Further, the spiral groove is wide at the top and narrow at the bottom.

[0013] Further, the fin tip is arranged on one side or both sides of the outer fin.

[0014] Further, the fin tip is arranged on one side or both sides of the outer fin.

[0015] Further, the fin tip is arranged on one side or both sides of the outer fin.

[0016] Due to the above technical scheme, the utility model has the following advantages compared with the prior art:

[0017] The utility model discloses a kind of outer fin reinforced condensing pipes, outer fin and pipe body are integrally formed, eliminate the contact thermal resistance between both;And because the thickness of outer fin two sides is reduced in the direction outward, it is favorable to destroy the tension of condensate film outside pipe and thereby reduce liquid film thickness;The fin tip of outer fin side edge and the recess of outer fin top end are arranged, which is favorable to destroy the surface tension of condensate film, reduce condensate film thickness, thereby reduce thermal resistance, while heat exchange area is effectively increased, further improve the heat exchange effect outside pipe;The inner thread rib of pipe body inner surface, then it is favorable to improve the flow state of fluid in pipe, reduce boundary layer, reduce the thermal resistance of heat exchange in pipe, make the heat exchange efficiency inside and outside pipe be optimized combination, improve the overall heat exchange performance of condensing pipe. BRIEF DESCRIPTION OF DRAWINGS

[0018] Some specific embodiments of the utility model will be described in detail hereinafter with reference to the accompanying drawings in an exemplary but not restrictive manner. The same reference signs in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0019] Figure 1 is a three-dimensional structure schematic view of a kind of outer fin reinforced condensing pipe provided by the utility model;

[0020] Figure 2 is a front view of a kind of outer fin reinforced condensing pipe provided by the utility model;

[0021] Figure 3It is the top view of the outer fin reinforced type condensing pipe provided by the utility model,

[0022] Figure 4 It is the right view of the outer fin reinforced type condensing pipe provided by the utility model,

[0023] Figure 5 It is the sectional view of the outer fin reinforced type condensing pipe provided by the utility model,

[0024] Among them, the sign explanation is as follows:

[0025] 1, pipe body, 2, outer fin, 21, fin top groove, 22, fin tip, 3, spiral channel, 4, inner thread rib, 41, inner thread groove. Specific implementation

[0026] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0027] As Figure 1 The utility model discloses a kind of outer fin reinforced type condensing pipe's three-dimensional structure schematic diagram, it is the part of reinforced type condensing pipe, which includes pipe body 1, and outer fin 2 and inner thread rib 4 integrally formed with pipe body 1.

[0028] Referring to Figures 1 to 5 Outer fin 2 extends along the radial direction of pipe body 1 and extends in spiral state around pipe body on the outer surface of pipe body. Outer fin 2 is rolled from the material on pipe body 1. The integrally formed setting eliminates the contact thermal resistance between outer fin 2 and pipe body 1, and further reduces the heat transfer loss between them.

[0029] The thickness of both sides of outer fin 2 gradually decreases outward along the radial direction of pipe body 1, i.e. the thickness of bottom end of outer fin 2 is greater than that of top end. The thicker part of bottom end of outer fin 2 can effectively enhance the turbulent flow of condensate, thereby improving the heat transfer efficiency. And with the gradual thinning of outer fin 2 outward, the resistance of condensate can be reduced, the flow loss can be reduced, and the flow characteristics of condensate can be improved. In addition, the bottom end of outer fin 2 is set thicker, which can increase the surface area in contact with condensate and improve the efficiency of heat exchange, and the design of gradually decreasing thickness helps to maintain the speed of condensate flowing through outer fin 2, thereby optimizing the overall heat transfer performance.

[0030] The gap between two adjacent outer fins 2 forms a spiral groove 3, and each spiral groove 3 is connected to each other. In this embodiment, the spiral groove 3 is wide at the top and narrow at the bottom. The spiral groove 3 which is wide at the top and narrow at the bottom can enhance the flowability of the condensate, promote the heat transfer in the fluid, and thus improve the condensation efficiency. By optimizing the flow path of the condensate, the flow resistance of the condensate is further reduced, and the heat exchange efficiency is ensured.

[0031] A fin top groove 21 is formed at the top end of the outer fin 2, and each fin top groove 21 is spaced along the spiral extension direction of the outer fin 2. The direction of each fin top groove 21 is consistent, and the fin top grooves 21 on the adjacent two outer fins 2 are connected to each other. Thus, a plurality of notches are formed at the top of the fin, which is beneficial to further promote the flow of the condensate, reduce the thickness of the liquid film, reduce the thermal resistance outside the tube, and effectively increase the heat exchange area, thereby further improving the heat exchange effect outside the tube.

[0032] In addition, the opening direction of the fin top groove 21 and the direction of the spiral groove 3 are cross arranged, that is, the direction of the fin top groove 21 and the direction of the spiral groove 3 are staggered, and the fin top groove 21 and the spiral groove 3 are connected. The fin top groove 21 and the spiral groove 3 are arranged in communication, which can reduce the flow dead zone, improve the flow characteristics of the condensate, reduce the thermal resistance when the condensate slides on the fin surface, increase the turbulence of the condensate, and improve the system energy efficiency.

[0033] It should be noted that the opening depth, opening direction, opening number of the fin top groove 21 and the spacing between the adjacent fin top grooves 21 can be reasonably arranged and adjusted according to actual needs.

[0034] In order to further improve the heat exchange effect, in this embodiment, a fin tip 22 is arranged on the side of the outer fin 2. Consistent with the fin top groove 21, the fin tip 22 is also arranged in the spiral extension direction of the outer fin 2. Specifically, the fin tip 22 is a sharp protrusion, and the sharp part of the sharp protrusion faces outwardly of the tube body 1, which aims to destroy the surface tension of the condensate liquid film through the sharp part, reduce the thickness of the liquid film, improve the flow efficiency of the condensate, reduce the thermal resistance outside the tube, increase the heat exchange area, and thus further improve the heat exchange effect outside the tube.

[0035] In this embodiment, the fin tip 22 can be arranged on one side or both sides of the outer fin 2, and the specific arrangement of one side or both sides can be adjusted according to actual needs. In addition, the fin tip 22 can be arranged in one row or two rows, or other number of rows. When the fin tip 22 is arranged in two rows or more, the fin tips 22 between the adjacent two rows can be staggered or arranged correspondingly.

[0036] Whether staggered or corresponding, the wing tip 22 can increase the turbulence degree of the condensed liquid to some extent, improve the liquid discharge efficiency of the condenser, and improve the heat transfer performance.

[0037] The inner surface of the pipe body 1 is convexly provided with internal thread ribs 4, and the gap between adjacent two internal thread ribs 4 constitutes an internal thread groove 41. The internal thread state is beneficial to improve the flow state of the fluid in the pipe, thin the boundary layer, reduce the thermal resistance of the heat exchange in the pipe, optimize the combination of the heat exchange efficiency inside and outside the pipe, and improve the overall heat exchange performance of the heat exchange pipe.

[0038] As described above, the outer fin enhanced condenser pipe of the example is integrally formed by arranging the pipe body 1 and the outer fin 2, thereby reducing the energy loss between heat transfer; at the same time, the wing tip 22 is arranged at the side of the outer fin 2, and the fin top groove 21 is arranged at the top of the outer fin 2, thereby increasing the heat exchange surface area outside the pipe, promoting the flow of the condensed liquid, thinning the liquid film thickness, reducing the thermal resistance outside the pipe, and improving the heat exchange efficiency, thereby reducing the weight of the heat exchange pipe and strengthening the heat exchange process. At the same time, the structure of the internal thread rib 4 makes the fluid in the pipe form a turbulent state, thins the boundary layer, promotes the convection and mixing between the fluids, and effectively improves the heat exchange efficiency.

[0039] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An externally fin-stiffened condenser tube, characterized by, The application relates to a pipe body (1) and an outer fin (2) integrally formed with the pipe body (1) by extending material on the pipe body (1) in the radial direction of the pipe body (1) and extending on the outer surface of the pipe body (1) in a spiral state around the pipe body (1), the thickness of the outer fin (2) gradually decreases outward in the radial direction of the pipe body (1), the gap between two adjacent outer fins (2) forms a spiral channel (3), a fin top groove (21) is arranged on the top end of the outer fin (2), the fin top groove (21) is arranged at intervals in the spiral extension direction of the outer fin (2), a fin tip (22) is arranged on the side of the outer fin (2), the fin tip (22) is arranged at intervals in the spiral extension direction of the outer fin (2), and an inner thread rib (4) integrally formed with the pipe body (1) is arranged on the inner surface of the pipe body (1). The fin tip (22) is a sharp protrusion, and the sharp part of the sharp protrusion faces outward.

2. The externally fin-stiffened condenser tube of claim 1, wherein The fin tip (22) is arranged on one side or both sides of the outer fin (2).

3. The externally finned enhanced condensing tube of claim 2, wherein, One row or multiple rows of the fin tip (22) are arranged on one side of the outer fin (2).

4. The externally finned enhanced condenser tube of claim 3, wherein, Two rows of the fin tip (22) are arranged on one side of the outer fin (2), and the two rows of the fin tip (22) are arranged staggeredly or correspondingly.

5. The externally finned enhanced condenser tube of claim 4, wherein, The spiral channel (3) is wide at the top and narrow at the bottom.

6. The externally finned enhanced condensing tube of claim 1 wherein, The fin top groove (21) is arranged crosswise to the spiral channel (3), and the fin top groove (21) is communicated with the spiral channel (3).

7. The externally finned enhanced condensing tube of claim 1 wherein, The fin top grooves (21) on two adjacent outer fins (2) are communicated with each other.

8. The externally finned enhanced condenser tube of claim 1 wherein, The gap between two adjacent inner thread ribs (4) forms an inner thread groove (41).

9. The externally finned enhanced condenser tube of claim 1 wherein, ​

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