Enhanced condensation heat exchange tube

Abstract

The utility model relates to a reinforced condensation heat exchange tube, belongs to the technical field of condensation heat exchange tubes in air conditioning and refrigerating systems, and solves the problem that the heat exchange efficiency is reduced as the flow rate of a heat exchange medium is reduced as the resistance of the existing fins to the heat exchange medium is larger. Comprising a tube body and a plurality of outer fins, the outer fins are formed by extending materials on the tube body from inside to outside in the radius direction of the tube body, the outer fins are arranged on the outer surface of the tube body and distributed around the tube body in a spiral state, and the outer fins are arranged in a conical shape. Every two adjacent rows or rows of outer fins are matched to form an inter-fin channel, and internal thread ribs which are of an integrated structure with the pipe body are arranged on the inner surface of the pipe body in a protruding mode; the heat exchanger has the effects of reducing resistance, improving the flow rate of a heat exchange medium and improving the heat exchange efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of condensation heat exchange tubes in air conditioners and refrigeration systems, and in particular relates to an enhanced condensation heat exchange tube. Background Art

[0002] The existing patent announcement number "CN103791754A" announces a high-efficiency heat exchange tube for a condenser, which belongs to the technical field of condensing heat exchange tubes in air conditioning and refrigeration systems. It includes a tube body, a spiral fin formed by extending the material on the tube body along the radial direction of the tube body and extending in a spiral state around the tube body on the outer surface of the tube body, and the spiral groove of the fin is formed on the spiral fin along the length direction of the tube body, and also includes the fin circumferential grooves that are arranged on the spiral fin at intervals along the circumferential direction of the tube body and are interlaced with the spiral groove of the fin and communicated with the spiral groove of the fin. Through the spiral groove of the fin and the circumferential groove of the fin, independent heat exchange surface expansion units that are communicated with the spiral groove of the fin and the circumferential groove of the fin are formed on the spiral fin.

[0003] The above content has the following problems: the fins in the high-efficiency heat exchange tubes used in this condenser are arranged in a pyramidal shape. When the heat exchange medium flows in the spiral groove, the flow resistance to the heat exchange medium is increased, the flow rate of the heat exchange medium is reduced, and thus the heat exchange efficiency is reduced. Utility Model Content

[0004] The utility model aims to provide an enhanced condensation heat exchange tube, which solves the problem that the existing fins have a large resistance to the heat exchange medium, reduce the flow rate of the heat exchange medium, and thus reduce the heat exchange efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides an enhanced condensation heat exchange tube, comprising a tube body and a plurality of external fins extending from the inside to the outside along the radial direction of the tube body from the material on the tube body, wherein the plurality of external fins are arranged on the outer surface of the tube body and distributed in a spiral state around the tube body, the external fins are arranged in a conical shape, and the external fins of two adjacent rows or two lines cooperate to form an inter-fin groove, and an internal threaded rib which is an integral structure with the tube body is convexly provided on the inner surface of the tube body.

[0007] Furthermore, the outer fins include a first fin and a second fin, the height of the first fin along the radial direction of the tube body is greater than the height of the second fin along the radial direction of the tube body, and the first fin and the second fin are distributed on the outer surface of the tube body in rows and columns.

[0008] Furthermore, the height of the first fin is 0.7 mm to 1.5 mm, and the height of the second fin is 0.5 mm to 1.2 mm.

[0009] Furthermore, the adjacent second fins distributed in rows and columns on the outer surface of the tube body cooperate with the first fins on both sides of the second fins to form a drainage channel, and the drainage channel has a spiral direction.

[0010] Furthermore, the surface of the tube body and the outer surface of the outer fin are coated with a liquid-repellent coating.

[0011] Furthermore, the outer fins and the inner threaded ribs are integrally formed with the tube body.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The enhanced condensing heat exchange tube of the utility model can reduce the resistance to the flow of the heat exchange medium when the heat exchange medium flows in the groove between the fins by arranging the outer fins in a conical shape, accelerate the drainage speed of the condensate at the bottom of the groove, and improve the heat exchange effect of the condensing heat exchange tube.

[0014] Furthermore, by arranging the conical outer fins into a first fin and a second fin with a high and low interval, the retention effect of the surface tension on the droplets can be reduced, thereby accelerating the detachment of the condensed droplets. At the same time, the heat exchange area is effectively increased, effectively improving the heat transfer effect and increasing the heat transfer coefficient outside the condensation heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0016] Figure 1 It is a cross-sectional view of a preferred embodiment of the utility model;

[0017] Figure 2 yes Figure 1 Main cross-sectional view of the structure;

[0018] Figure 3 yes Figure 1 Right sectional view of the structure;

[0019] Figure 4 It is a top view of a preferred embodiment of the utility model.

[0020] The reference numerals are described as follows:

[0021] 1. Pipe body; 2. External fins; 21. First fins; 22. Second fins; 3. Inter-fin channels; 4. Internal threaded ribs; 5. Drainage channels. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In addition, 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.

[0025] refer to Figure 1-Figure 4 , which is an enhanced condensation heat exchange tube provided by the utility model, includes a tube body 1 and a plurality of external fins 2 extending from the inside to the outside along the radial direction of the tube body 1 by the material of the tube body 1, the plurality of external fins 2 are arranged on the outer surface of the tube body and distributed in a spiral state around the tube body 1, the external fins 2 are arranged in a conical shape, and two adjacent rows or two lines of external fins 2 cooperate to form an inter-fin groove 3, and an internal threaded rib 4 which is an integral structure with the tube body 1 is convexly provided on the inner surface of the tube body 1.

[0026] refer to Figure 1-Figure 4 , wherein the outer fin 2 includes a first fin 21 and a second fin 22, the height of the first fin 21 along the radial direction of the tube body 1 is greater than the height of the second fin 22 along the radial direction of the tube body 1, and the first fin 21 and the second fin 22 are distributed on the outer surface of the tube body 1 in rows and columns. The height of the first fin 21 is 0.7mm~1.5mm, and the height of the second fin 22 is 0.5mm~1.2mm.

[0027] refer to Figure 1-Figure 4The adjacent second fins 22 distributed in rows and columns on the outer surface of the tube body 1 cooperate with the first fins 21 on both sides of the second fins 22 to form a rapid liquid drainage channel 5, and the rapid liquid drainage channel 5 is spiral. Since the height of the first fin 21 is greater than the height of the second fin 22, the rapid liquid drainage channel 5 formed at this time is a "canyon" channel, which facilitates the flow of the heat exchange medium.

[0028] refer to Figure 1-Figure 4 The enhanced condensation heat exchange tube in this example has the following beneficial effects:

[0029] (1) By integrating the outer fin 2, the inner thread rib 4 and the tube body 1 into an integrated structure, there is no contact thermal resistance;

[0030] (2) The internal threaded ribs 4 provided on the inner surface of the tube body 1 are conducive to improving the flow state of the fluid in the tube, thinning the boundary layer, reducing the thermal resistance of the heat exchange in the tube, optimizing the heat exchange efficiency inside and outside the tube, and improving the overall heat exchange performance of the heat exchange tube;

[0031] (3) By setting the outer fins 2 in a conical shape, when the heat exchange medium flows in the inter-fin groove 3, the flow resistance to the heat exchange medium can be reduced, the drainage speed of the condensate at the bottom of the groove can be accelerated, and the heat exchange effect of the condensation heat exchange tube can be improved;

[0032] (4) The surface of the tube body 1 and the outer surface of the outer fin 2 are coated with a liquid-repellent coating, which reduces the adhesion between the heat exchange medium and the tube body 1 and the outer fin 2, thereby facilitating the flow of the heat exchange medium in the inter-fin groove 3;

[0033] (5) By arranging the conical outer fin 2 into a first fin 21 and a second fin 22 with a high and low spacing, the retention effect of the surface tension on the droplets can be reduced, thereby accelerating the detachment of the condensed droplets. At the same time, the heat exchange area is effectively increased, the heat transfer effect is effectively improved, and the heat transfer coefficient outside the condensation heat exchange tube is increased.

[0034] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A reinforced condensation heat exchange tube, characterized in that: The invention comprises a tube body (1) and a plurality of external fins (2) extending from the inside to the outside along the radial direction of the tube body (1) from the material on the tube body (1), wherein the plurality of external fins (2) are arranged on the outer surface of the tube body (1) and are distributed in a spiral state around the tube body (1), the external fins (2) are arranged in a conical shape, and two adjacent rows or lines of the external fins (2) cooperate to form an inter-fin groove (3), and an internal thread rib (4) is protrudingly provided on the inner surface of the tube body (1).

2. The enhanced condensation heat exchange tube according to claim 1, characterized in that: The outer fins (2) comprise a first fin (21) and a second fin (22); the height of the first fin (21) along the radial direction of the tube body (1) is greater than the height of the second fin (22) along the radial direction of the tube body (1); the first fins (21) and the second fins (22) are distributed in rows and columns at intervals on the outer surface of the tube body (1).

3. The enhanced condensation heat exchange tube according to claim 2, characterized in that: The height of the first fin (21) is 0.7 mm to 1.5 mm, and the height of the second fin (22) is 0.5 mm to 1.2 mm.

4. The enhanced condensation heat exchange tube according to claim 2 or 3, characterized in that: The adjacent second fins (22) distributed in rows and columns on the outer surface of the tube body (1) cooperate with the first fins (21) on both sides of the second fins (22) to form a drainage channel (5), and the drainage channel (5) is spiral.

5. The enhanced condensation heat exchange tube according to claim 1, characterized in that: The surface of the tube body (1) and the outer surface of the outer fin (2) are both coated with a liquid-repellent coating.

6. The enhanced condensation heat exchange tube according to claim 1, characterized in that: The external fins (2) and the internal threaded ribs (4) are both integrally formed with the tube body (1).

Images