CN217764628U - Heat exchange tube for evaporator - Google Patents

Abstract

The utility model relates to a heat exchange tube for evaporator, it includes the body and extends and be the outer fin that spiral state extends and form and constitute as an organic whole with the body at the surface of body around the body along the radial direction of body by the material on the body, and clearance between the two adjacent outer fins constitutes the channel that communicates each other, the outer fin top seted up with the unanimous first recess of outer fin spiral extending direction, the top of outer fin with interval state constitute have with first recess and with the second recess of channel intercommunication, the internal surface epirelief of body is equipped with the interior screw thread rib that is a body structure with the body, the outer fin is in first recess top both sides extend in opposite directions are formed with the blend stop. Because the two sides of the top of the first groove extend oppositely to form the barrier strips, the number of the hole structures is further increased, the number of the vaporization cores is increased, and the boiling heat exchange effect is enhanced.

Description

Heat exchange tube for evaporator

Technical Field

The utility model belongs to the technical field of the condensation heat exchange pipe among air conditioner, the refrigerating system, concretely relates to heat exchange pipe for evaporimeter.

Background

The evaporation heat exchanger is an indispensable component in a central air-conditioning system, and the evaporation tube is a core component of the evaporation heat exchanger, and the heat exchange performance of the evaporation heat exchanger determines the performance of the evaporation heat exchanger. For the heat exchange tube manufacturing industry, the energy efficiency of refrigeration air conditioning equipment is mainly improved by improving the heat exchange efficiency of the heat exchange tube. Studies on boiling heat transfer mechanisms have shown that boiling of liquids requires the presence of a core of vaporization. Given the degree of superheat of the heating surface, the bubble grows and nucleate boiling proceeds only when the radius of the vaporization core is greater than the minimum radius required for bubble growth. And the cavity formed by the grooves on the heated surface is most likely to be the core of vaporization. In the boiling process, after the bubbles grow and are separated from the cavities, the active cavities can intercept part of steam due to the action of the surface tension of the liquid, become a new vaporization core and grow new bubbles, so that the boiling process is continuously continued. For full liquid evaporation, the reasonable arrangement of the cavity structure plays a crucial role in enhancing heat transfer, the cavity structure of the heat exchange tube is beneficial to generating bubbles, the bubbles can freely float and be discharged out of the surface of the liquid, a continuous boiling heat exchange process is formed, and therefore the heat exchange performance of the heat exchange tube is improved.

The Chinese patent document 'CN 209672913U' is the heat exchange tube for the evaporator, and the performance of the heat exchange tube still has a space for improving.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heat exchange tube for evaporator has solved the problem that improves heat transfer performance.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a heat exchange tube for evaporator, it includes the body and extends and be the outer fin that spiral state extends and form and constitute as an organic whole with the body at the surface of body around the body along the radial direction of body by the material on the body, and the clearance between the two adjacent outer fins constitutes the channel that communicates each other, outer fin top seted up with the unanimous first recess of outer fin spiral extending direction, the top of outer fin with interval state constitute have with first recess and with the second recess of channel intercommunication, the internal surface epirelief of body is equipped with the internal thread rib that is a body structure with the body, outer fin is in first recess top both sides are extended in opposite directions and are formed with the blend stop.

Preferably, the top end of the outer fin has a head portion with increased thickness at both sides, and the first groove is provided in the head portion.

Further, the thickness of the two sides of the lower end of the head part is narrowed in the extending direction towards the surface of the pipe body.

Further, the thickness of both sides of the head is uniform in a radial direction along the pipe body.

Furthermore, the bottom of the first groove is narrowed towards the surface of the pipe body, and the bottom of the first groove is narrowed into a straight line or narrowed to a plane bottom surface or narrowed to a concave bottom surface.

Preferably, the top surface of the barrier strip extends parallel to the outer surface of the pipe body.

Preferably, the bottom of the first groove is narrowed toward the surface of the tube body, and the bottom of the first groove is narrowed into a straight line or narrowed to a plane bottom surface or narrowed to a concave bottom surface.

Because of the application of the technical scheme, compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses a heat exchange tube for evaporator has increased the outside of tubes heat transfer area of heat exchange tube because first recess and second groove structure's setting, in addition, because the top both sides of first recess extend in opposite directions and are formed with the blend stop, has consequently further increased hole structure quantity, has increased vaporization core quantity to strengthen boiling heat transfer effect.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a partial structural schematic diagram of embodiment 1 of the present invention;

FIG. 2 is an enlarged view at A of FIG. 1;

FIG. 3 is a cross-sectional view taken perpendicular to the direction of the channels;

FIG. 4 is an enlarged view of the outer fins;

FIG. 5 is a schematic view of the structure of an outer fin of embodiment 2, corresponding to FIG. 3;

FIG. 6 is a schematic view of the structure of an outer fin of embodiment 3, corresponding to FIG. 3;

FIG. 7 is a schematic view of the structure of an outer fin of embodiment 4, corresponding to FIG. 3;

wherein the reference numerals are as follows:

1. a tube body;

2. an outer fin; 21. a first groove; 22. a second groove; 23. blocking strips; 24. a head portion;

3. a channel;

4. internal thread ribs.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The heat exchange tube for an evaporator shown in fig. 1 comprises a tube body 1, an outer fin 2 and an inner threaded rib 4. External fin

The tubular body 1 is tubular. Outer fin 2 and body 1 are a body structure, and outer fin 2 outwards extends along the radial direction of body 1 from body 1 surface, and outer fin 2 is the spiral state around body 1 surface and extends. The outer fins 2 are formed by extruding the material of the tube body 1.

As shown in fig. 1, 2 and 4, the gaps between two adjacent outer fins 2 form channels 3 which communicate with each other. The outer fin 2 is further provided with a second groove 22. The second grooves 22 are distributed in a spaced state. The second groove 22 communicates with the channel 3. The top end of the outer fin 2 is also provided with a first groove 21, and the first groove 21 is consistent with the spiral extending direction of the outer fin 2. The first recess 21 communicates with the second recess 22. The outer fin 2 is formed with barrier strips 23 extending oppositely on two sides of the top of the first groove 21. The top end of the outer fin 2 has a head portion 24, and the thickness of both sides of the head portion 24 is increased. And the first recess 21 is provided in the head 24. The stop strip 23 is formed by the material of the head 24 extending towards each other on both sides of the top of the first recess 21. The top surface of the barrier strip 23 extends in parallel with the outer surface of the tube body 1, so that the outer surface of the integral heat exchange tube is relatively flat.

As shown in fig. 2 and 3, the thickness of the head 24 is narrowed in the direction extending toward the surface of the pipe body 1, so as to facilitate the escape of the air bubbles in the channel 3. And the shape of the first recess 21 matches the shape of the head 24. The bottom of the first groove 21 is narrowed toward the surface of the tube 1 and narrowed to a planar bottom surface.

The inner surface of the pipe body 1 is convexly provided with an inner thread rib 4, and the inner thread rib 4 and the pipe body 1 are of an integral structure.

Example 2

As shown in fig. 5, according to embodiment 2, which corresponds to fig. 3, unlike embodiment 1, the thickness of the head 24 on both sides is uniform along the radius direction of the pipe body 1, and the shape of the first groove 21 is matched with the shape of the head 24, that is, the thickness of the first groove 21 on both sides is uniform along the radius direction of the pipe body 1.

Example 3

As shown in fig. 6, according to embodiment 3, the difference from embodiment 1 is that the bottom of the first groove 21 narrows to a straight line toward the surface of the pipe body 1, corresponding to fig. 3.

Example 4

Embodiment 3 shown in fig. 7 corresponds to fig. 3, and differs from embodiment 1 in that the thickness of both sides of the head portion 24 is uniform in the radial direction along the pipe body 1. While the shape of the first recess 21 does not match the shape of the head 24.

In other embodiments, the bottom of the first groove 21 may be narrowed toward the surface of the tube 1 to a concave bottom.

The beneficial effects produced by the above embodiment are as follows:

(1) The outer fins 2 and the tube body 1 are of an integral structure and have no thermal contact resistance;

(2) The channel 3 is arranged to form a cavity structure to become a vaporization core, which is beneficial to the generation of bubbles;

(3) The top of the outer fin 2 is provided with a first groove 21 structure, so that the number of hole structures is further increased, the number of vaporization cores is effectively increased, and the boiling heat exchange effect is enhanced;

(4) The second groove 22 structure is arranged in the cross direction of the outer fin 2, so that the heat exchange area is increased, bubbles are generated easily, the bubbles can float freely to be discharged out of the liquid surface, a continuous boiling heat exchange process is formed, and the heat exchange performance of the heat exchange tube is improved;

(5) The internal thread rib 4 structure in the tube is beneficial to improving the flowing state of fluid in the tube, thinning a boundary layer, reducing the thermal resistance of heat exchange in the tube and optimizing and combining the heat exchange efficiency inside and outside the tube, thereby improving the overall heat exchange performance of the evaporation heat exchange tube.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (7)

1. The utility model provides a heat exchange tube for evaporator, it includes body (1) and by the material on body (1) along the radial direction extension of body (1) and be outer fin (2) that constitute an organic whole with body (1) that the spiral state extends and form around body (1) at the surface of body (1), the clearance between two adjacent outer fins (2) constitutes channel (3) that communicate each other, outer fin (2) top seted up with outer fin (2) spiral extending direction unanimous first recess (21), the top of outer fin (2) constitute with the interval state have with first recess (21) and with second recess (22) of channel (3) intercommunication, the internal surface epirelief of body (1) is equipped with and is the internal thread rib (4) of body structure, its characterized in that: the outer fin (2) extends oppositely on two sides of the top of the first groove (21) to form barrier strips (23).

2. A heat exchange tube for an evaporator according to claim 1, wherein: the top end of the outer fin (2) is provided with a head part (24) with two sides with increased thickness, and the first groove (21) is arranged in the head part (24).

3. A heat exchange tube for an evaporator according to claim 2, wherein: the thickness of the two sides of the lower end of the head part (24) is narrowed in the extending direction towards the surface of the pipe body (1).

4. A heat exchange tube for an evaporator according to claim 2, wherein: the thickness of the two sides of the head (24) is consistent along the radius direction of the pipe body (1).

5. The heat exchange tube for an evaporator as set forth in claim 4, wherein: the bottom of the first groove (21) is narrowed towards the surface direction of the pipe body (1) and is narrowed into a straight line or narrowed to a plane bottom surface or narrowed to a concave bottom surface.

6. A heat exchange tube for an evaporator according to claim 1, wherein: the top surface of the barrier strip (23) extends in parallel with the outer surface of the pipe body (1).

7. A heat exchange tube for an evaporator according to claim 1, wherein: the bottom of the first groove (21) is narrowed towards the surface direction of the pipe body (1) and narrowed into a straight line or narrowed to a plane-shaped bottom surface or narrowed to a concave surface-shaped bottom surface.

Images