Dry type evaporating pipe

Abstract

The utility model relates to a dry-type evaporating pipe which comprises a pipe body and inner fins, the inner fins are formed by extending materials on the pipe body in the radius direction of the pipe body and spirally extending on the inner surface of the pipe body around the pipe body, the inner fins and the pipe body are integrally formed, and a groove channel is formed by a gap between every two adjacent inner fins. Grooves are formed in the roots of the inner fins, the channels are communicated with the grooves, and arc sections are arranged on the bottom edges of the sections of the grooves. The pipe body of the dry type evaporation pipe and the inner fins are integrally formed, so that energy loss during heat transfer is reduced; meanwhile, the grooves are formed in the roots of the inner fins, the heat exchange efficiency is improved by increasing the heat exchange surface area in the pipe, therefore, the weight of the heat exchange pipe can be reduced, the evaporation heat exchange process can be enhanced, liquid in the pipe can form turbulent flow through the grooves, and the heat exchange efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporator tube heat exchange, in particular to a dry evaporator tube. Background Art

[0002] In order to save materials, reduce costs, improve the effective utilization of energy and make the heat exchanger structure compact, dry evaporator tubes are gradually replacing bare tubes. Especially with the introduction of the new national air-conditioning energy efficiency standards, the share of dry evaporator tubes in copper tubes for air-conditioning refrigeration is gradually expanding. Compared with bare tubes, dry evaporator tubes can increase the heat exchange area, and the turbulent flow formed can improve the heat exchange efficiency and achieve energy-saving effects.

[0003] Dry evaporation copper tubes are used as an important means to improve the heat exchange rate of heat exchangers at home and abroad, which can reduce the volume of heat exchangers. Since copper resources in my country are relatively scarce, but the market demand for copper tubes is strong, therefore, under the premise of meeting the technical indicators of copper tube stiffness, strength, heat dissipation performance, etc., the internal structure of dry evaporation tubes can be improved to reduce the volume and weight of heat exchange units, improve energy efficiency, and reduce copper consumption, thereby achieving the purpose of energy and material saving. Utility Model Content

[0004] The utility model aims to provide a dry evaporator tube, which improves the heat exchange efficiency of the evaporator tube by improving the internal structure of the dry evaporator tube in the prior art.

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

[0006] The utility model provides a dry evaporator tube, comprising a tube body and inner fins formed integrally with the tube body, which are 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 inner surface of the tube body. The gap between two adjacent inner fins constitutes a channel, a groove is opened at the root of the inner fin, the groove is connected with the groove, and the cross-section bottom edge of the groove has an arc segment.

[0007] Furthermore, the groove is in a flared shape, and comprises: a straight line segment at the root of the inner fin, a first circular arc segment at the bottom, and a second circular arc segment opposite to the straight line segment.

[0008] Furthermore, the radius of the first circular arc segment of the bottom is smaller than the radius of the second circular arc segment.

[0009] As a preferred embodiment, a groove is provided on one side of the root of the inner fin.

[0010] As another preferred embodiment, grooves are provided on both sides of the root of the inner fin.

[0011] Furthermore, the groove spirally passes through the channel around at least one side outer wall of the root of the inner fin.

[0012] Furthermore, the groove is intermittently and spirally arranged in the channel around at least one side outer wall of the root of the inner fin.

[0013] Furthermore, the height of the inner fin is 0.3-1.0 mm, and the depth of the groove is 0.1-0.5 mm.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] The utility model discloses a dry evaporator tube, which reduces the energy loss during heat transfer by forming the tube body and the inner fins into one piece; at the same time, a groove is provided at the root of the inner fin to increase the heat exchange surface area in the tube and improve the heat exchange efficiency, thereby reducing the weight of the heat exchange tube and strengthening the evaporation heat exchange process. The groove also helps to form turbulence in the liquid in the tube, further improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the first dry evaporation tube provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the second dry evaporation tube provided by the utility model;

[0019] Figure 3 This is a cross-sectional view of the first dry evaporation tube provided by the utility model;

[0020] Figure 4 It is a cross-sectional view of the second dry evaporation tube provided by the utility model;

[0021] Figure 5 The utility model provides a schematic diagram of fluid flow in a dry evaporation tube.

[0022] The reference numerals are described as follows:

[0023] 1. Tube body; 2. Inner fins; 3. Channel; 4. Recess. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figure 1 The three-dimensional structural diagram of the first type of dry evaporator tube shown is a portion of a cut dry evaporator tube. It includes a tube body 1 and an inner fin 2 arranged on the inner surface of the tube body 1. The inner fin 2 is made by spinning the material on the tube body 1, and the inner fin 2 extends spirally on the inner surface of the tube body 1, extending from one end of the tube body 1 to the other end. The inner fin 2 and the tube body 1 are integrally formed, so the contact thermal resistance between the two is eliminated, thereby reducing the heat transfer loss between the two. The gap between two adjacent inner fins 2 constitutes a groove 3, and the groove 3 also extends in a spiral shape on the inner surface of the tube body 1. In addition, a groove 4 is provided at the root of the inner fin 2, and the groove 4 is also interconnected with the above-mentioned groove 3.

[0026] In one embodiment of the present invention, the groove 4 may be provided only on one side of the root of the inner fin 2. Figure 2 In another embodiment of the present invention, the groove 4 can also be provided on both sides of the root of the inner fin 2 .

[0027] At the same time, the groove 4 can be a space that spirals through the channel 3 around at least one side of the outer wall of the root of the inner fin 2, or can be intermittently spirally arranged in the channel 3 around at least one side of the outer wall of the root of the inner fin 2. This forms different spiral effects, increases the contact area between the fluids in the tube, strengthens the convection mixing between the fluids, and improves the heat transfer efficiency.

[0028] See also Figure 3 and Figure 4 Specifically, the groove 4 includes a straight section that fits the root of the inner fin 2, a first arc section at the bottom, and a second arc section opposite to the straight section. The radius of the first arc section is smaller than the radius of the second arc section. The setting of the groove structure can increase the heat exchange surface area in the evaporator tube, thereby improving the heat exchange efficiency in the tube. In addition, by opening the groove 4, the side structure at the root of the inner fin 2 is thinned, so that the fluid thickness of the refrigerant is spread thinner, thereby reducing the weight of the evaporator tube, reducing the heat exchange volume of the evaporator tube, thereby improving the energy efficiency ratio and heat exchange effect of the evaporator tube, and correspondingly reducing the copper consumption required for the preparation of the evaporator tube, and implementing the concept of energy saving and material saving. In addition, the aforementioned groove 4 is set as a three-stage groove structure, which increases the complexity of the groove structure while making the structure of the channel 3 between adjacent inner fins 2 more complicated, thereby improving the turbulence intensity in the evaporator tube.

[0029] See also Figure 5 As shown in the schematic diagram of fluid flow in the tube, the increase in turbulence intensity can promote convection and mixing of the fluid in the tube, so that the fluid in the tube forms turbulence along the spiral direction and also turns and swirls along the groove wall. The arc segment structure of the groove 4 makes it easier for the fluid to swirl. Under the turbulent flow state, the fluid generates shear force on the surface of the tube wall, causing the boundary layer to be disturbed, increasing the effective heat transfer area of ​​the heat transfer interface, reducing the thermal resistance on the heat transfer surface, thereby improving the heat exchange efficiency.

[0030] In the present invention, the height of the inner fin 2 is set at 0.3-1.0 mm, and the depth of the groove is controlled at 0.1-0.5 mm.

[0031] In summary, the dry evaporator tube of this example has the tube body 1 and the inner fin 2 formed as one piece to reduce the energy loss during heat transfer; at the same time, a groove 4 is provided at the root of the inner fin 2 to increase the heat exchange surface area in the tube and improve the heat exchange efficiency, thereby reducing the weight of the heat exchange tube and strengthening the evaporation heat exchange process. With the help of the complex structure of the groove 4, the fluid in the tube forms a turbulent state, promoting convection and mixing between the fluids, and effectively improving the heat exchange efficiency.

[0032] 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 dry evaporation tube, characterized in that: It comprises a tube body (1) and inner fins (2) formed integrally with the tube body (1) and formed by extending the material on the tube body (1) along the radial direction of the tube body (1) and extending in a spiral state around the tube body (1) on the inner surface of the tube body (1), wherein the gap between two adjacent inner fins (2) forms a groove (3). A groove (4) is provided at the root of the inner fin (2), the channel (3) is connected to the groove (4), and the bottom edge of the cross section of the groove (4) has an arc segment.

2. A dry evaporation tube according to claim 1, characterized in that: The groove (4) is in a flared shape, and comprises: a straight line segment at the root of the inner fin (2), a first arc segment at the bottom, and a second arc segment opposite to the straight line segment.

3. A dry evaporation tube according to claim 2, characterized in that: The radius of the first arc segment of the bottom is smaller than the radius of the second arc segment.

4. The dry evaporation tube according to claim 1, characterized in that: A groove (4) is provided on one side of the root of the inner fin (2).

5. The dry evaporation tube according to claim 1, characterized in that: Grooves (4) are provided on both sides of the root of the inner fin (2).

6. The dry evaporation tube according to claim 1, characterized in that: The groove (4) spirally passes through the channel (3) around at least one side outer wall of the root of the inner fin (2).

7. The dry evaporation tube according to claim 1, characterized in that: The groove (4) is arranged in a discontinuous spiral around at least one side outer wall of the root of the inner fin (2) in the channel (3).

8. The dry evaporation tube according to claim 1, characterized in that: The height of the inner fin (2) is 0.3-1.0 mm, and the depth of the groove (4) is 0.1-0.5 mm.

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