Efficient heat exchange tube for evaporator

Abstract

The utility model relates to an efficient heat exchange tube for an evaporator, belongs to the technical field of evaporation heat exchange tubes in air conditioning and refrigerating systems, and solves the problems that bubbles of an existing heat exchange tube are not easy to discharge and the heat exchange efficiency is low. Comprising a tube body and outer fins, the tops of the outer fins are evenly provided with T-shaped fins which extend towards the two sides to form platforms, a spiral groove channel formed by extending in the circumferential direction between every two adjacent T-shaped fins is of a cavity structure, a gap is reserved between every two adjacent T-shaped fins, and the width of the gap is gradually increased from inside to outside in the radial direction of the tube body. The bottom face of the spiral groove channel is provided with the vaporization groove, and the vaporization groove extends in the spiral direction of the spiral groove channel, so that refrigerants can rapidly enter the hole structures, bubbles formed by evaporation can rapidly grow and overflow, and the overall heat exchange efficiency of the heat exchange pipe is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of evaporative heat exchange tubes in air conditioners and refrigeration systems, and in particular relates to a high-efficiency heat exchange tube for an evaporator. Background Art

[0002] The existing patent announcement number "CN210718220U" announces a heat exchange tube for a full liquid evaporator, including a tube body and external fins extending in a spiral shape on the outer wall of the tube body, and the gap between two adjacent spiral external fins constitutes a connected cavity structure; the external fins include an upper half of the external fins and a lower half of the external fins respectively arranged on two opposite sides of the radial direction of the tube body; the cavity structure and the cavity opening formed between the upper half of the external fins are smaller, and the cavity structure and the cavity opening formed between the lower half of the external fins are larger.

[0003] The above content has the following problems: the refrigerant is not easy to enter the cavity of the heat exchange tube of the full liquid evaporator of this structure during operation, and the bubbles generated when the refrigerant evaporates are not easy to be discharged, thereby reducing the heat exchange efficiency. Utility Model Content

[0004] The utility model aims to provide a high-efficiency heat exchange tube for an evaporator, which solves the problem that the refrigerant is not easy to enter the cavity of the existing heat exchange tube when working, and the bubbles generated when the refrigerant evaporates are not easy to be discharged, thereby reducing 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 a high-efficiency heat exchange tube for an evaporator, comprising a tube body and an outer fin formed by extending along the radial direction of the tube body from a material on the tube body and extending in a spiral state around the tube body on the outer surface of the tube body to form an integral structure with the tube body, an inner threaded rib which is convexly arranged on the inner surface of the tube body and is an integral structure with the tube body, the outer fin is a T-shaped fin with a top evenly provided with a platform extending to both sides, a spiral groove extending circumferentially between two adjacent T-shaped fins is a cavity structure, a gap for discharging bubbles in the cavity structure is left between two adjacent T-shaped fins, the width of the gap gradually increases from the inside to the outside along the radial direction of the tube body, a vaporization groove is arranged on the bottom surface of the spiral groove, and the vaporization groove extends along the spiral direction of the spiral groove.

[0007] Furthermore, the number of the vaporization grooves is at least two.

[0008] Furthermore, the cross-section of the vaporization groove is V-shaped.

[0009] Furthermore, the bottom end surface of the transverse portion of the T-shaped fin is arranged as an inclined surface.

[0010] Furthermore, it also includes a cross channel connecting two adjacent spiral channels, and the cross channel extends in a spiral state around the tube body.

[0011] Furthermore, the number of the cross grooves is multiple and they are evenly distributed along the circumference of the tube body.

[0012] Furthermore, the width of the cross channel gradually increases from inside to outside along the radial direction of the tube body.

[0013] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0014] The utility model discloses an evaporator with a high-efficiency heat exchange tube, which gradually increases the width of the gap from the inside to the outside along the radial direction of the tube body, that is, is arranged in an inverted trumpet shape. On the one hand, it destroys the surface tension of the liquid, so that the liquid film on the surface of the spiral outer fin is effectively expanded, and it is easy for bubbles to be discharged and float up from the hole opening. On the other hand, it is beneficial for the refrigerant to flow into the hole structure during the evaporation heat exchange process, ensuring that the refrigerant is replenished in time, so that the boiling process can be carried out continuously, and the overall heat exchange efficiency of the heat exchange tube is improved. 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 It is a front view of a preferred embodiment of the utility model;

[0018] Figure 3 It is a top view of a preferred embodiment of the utility model.

[0019] The reference numerals are described as follows:

[0020] 1. Tube body; 2. External fins; 3. Internal threaded ribs; 4. Spiral grooves; 41. Cavity structure; 42. Gap; 5. Vaporization grooves; 6. Cross grooves. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] refer to Figure 1 , Figure 2 and Figure 3 , a high-efficiency heat exchange tube for an evaporator provided by the utility model, comprises a tube body 1 and an outer fin 2 which is formed by extending the material on the tube body 1 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 1 and is integral with the tube body 1, the outer fin 2 is formed by extruding the material on the tube body 1, the height of the outer fin 2 along the radial direction of the tube body 1 is the same, wherein the tube body 1 is arranged in a tubular shape, and the outer fin 2 is integrally formed with the tube body 1; an internal threaded rib 3 which is an integral structure with the tube body 1 is convexly provided on the inner surface of the tube body 1.

[0025] refer to Figure 1 , Figure 2 and Figure 3 The outer fin 2 is a T-shaped fin evenly provided on the top and extending to both sides to form a platform. The width of the vertical part of the T-shaped fin gradually decreases along the radial direction of the tube body. The lower part of the spiral groove 4 extending circumferentially between two adjacent T-shaped fins constitutes a cavity structure 41. A gap 42 for discharging bubbles in the cavity structure 41 is left between two adjacent T-shaped fins; wherein, the bottom end surface of the transverse part of the T-shaped fin is arranged in an inclined surface, and the width of the gap 42 gradually increases from the inside to the outside along the radial direction of the tube body 1, that is, it is arranged in an inverted trumpet shape.

[0026] refer to Figure 1 , Figure 2 and Figure 3 A vaporization groove 5 is provided on the bottom surface of the spiral groove 4. The vaporization groove 5 extends along the spiral direction of the spiral groove 4. The number of the vaporization grooves 5 is at least two, and the cross-sectional shape of the vaporization groove 5 is V-shaped. In this example, the number of the vaporization grooves 5 is two.

[0027] refer to Figure 1 , Figure 2and Figure 3 , and also includes a cross groove 6 connecting two adjacent spiral grooves 4, wherein the cross groove 6 extends in a spiral state around the tube body, the number of the cross grooves 6 is multiple and is evenly distributed along the circumference of the tube body 1, and the width of the cross groove 6 gradually increases from the inside to the outside along the radial direction of the tube body 1.

[0028] refer to Figure 1 , Figure 2 and Figure 3 The evaporator in this example uses high-efficiency heat exchange tubes, which have the following beneficial effects:

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

[0030] (2) The internal threaded ribs 3 provided on the inner surface of the tube body 1 are conducive to enhancing the turbulence of the fluid in the tube, while increasing the heat exchange area in the tube, thereby improving the heat exchange efficiency in the tube;

[0031] (3) The vaporization groove 5 arranged at the bottom of the spiral groove 3 provides a vaporization core required for the evaporation of a large amount of refrigerant, that is, during heat exchange, the heat in the tube body 1 is first transferred to the vaporization groove 5. At this time, the temperature in the vaporization groove 5 is relatively high. When the refrigerant flows into the vaporization groove 5, the bubbles generated by vaporization can grow rapidly. Moreover, since the vaporization groove 5 is arranged in a V-shaped groove, the bubbles are not easy to stick to the inner wall of the vaporization groove 5 when discharged and can overflow quickly. The boiling heat exchange is further enhanced, thereby improving the overall heat exchange efficiency of the heat exchange tube;

[0032] (4) By gradually increasing the width of the gap 42 from the inside to the outside along the radial direction of the tube body, that is, setting it in an inverted trumpet shape, on the one hand, the surface tension of the liquid is destroyed, so that the liquid film on the surface of the spiral outer fin is effectively expanded, and it is easy for bubbles to be discharged from the hole opening and float up. On the other hand, it is conducive to the refrigerant flowing into the hole structure during the evaporation heat exchange process, ensuring that the refrigerant is replenished in time, so that the boiling process can be carried out continuously; at the same time, by setting the bottom end face of the transverse part of the T-shaped fin as an inclined surface, the bubbles are not easy to adhere to the side wall of the T-shaped fin and can quickly overflow;

[0033] (5) The cross groove 6 provided for connecting two adjacent spiral grooves 4 facilitates the refrigerant to flow into the hole structure 41 during the evaporation heat exchange process, thereby ensuring that the refrigerant is replenished in time.

[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 high-efficiency heat exchange tube for an evaporator, comprising a tube body (1) and an outer fin (2) formed by extending along the radial direction of the tube body (1) and extending in a spiral state around the tube body (1) on the outer surface of the tube body (1) to form an integral part with the tube body, wherein an inner thread rib (3) is convexly provided on the inner surface of the tube body (1) and is an integral structure with the tube body (1), characterized in that: The outer fins (2) are T-shaped fins uniformly arranged on the top and extending to both sides to form platforms. The spiral groove (4) extending circumferentially between two adjacent T-shaped fins is a cavity structure (41). A gap (42) is left between the two adjacent T-shaped fins for discharging bubbles in the cavity structure (41). The width of the gap gradually increases from the inside to the outside along the radial direction of the tube body (1). The bottom surface of the spiral groove (4) is provided with a vaporization groove (5), and the vaporization groove (5) extends along the spiral direction of the spiral groove (4).

2. The high-efficiency heat exchange tube for evaporator according to claim 1, characterized in that: The number of the vaporization grooves (5) is at least two.

3. The high-efficiency heat exchange tube for evaporator according to claim 2, characterized in that: The cross-sectional shape of the vaporization groove (5) is V-shaped.

4. The high-efficiency heat exchange tube for evaporator according to any one of claims 1 to 3, characterized in that: The bottom end surface of the transverse portion of the T-shaped fin is arranged in an inclined surface.

5. The high-efficiency heat exchange tube for evaporator according to claim 4, characterized in that: It also comprises a cross channel (6) connecting two adjacent spiral channels (4), wherein the cross channel (6) extends in a spiral state around the tube body (1).

6. The high-efficiency heat exchange tube for evaporator according to claim 5, characterized in that: The number of the intersecting grooves (6) is plural and they are evenly distributed along the circumference of the tube body (1).

7. The high-efficiency heat exchange tube for evaporator according to claim 6, characterized in that: The width of the cross channel (6) gradually increases from the inside to the outside along the radial direction of the tube body (1).

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