Air conditioner copper pipe with spiral guide groove
By setting spiral guide grooves and turbulence structures inside the air conditioning copper pipes, setting condensate grooves and water guide ridges on the outer wall, and coating with a hydrophobic coating, the problems of low heat transfer efficiency and easy frost in air conditioning copper pipes are solved, achieving more efficient heat transfer and anti-frost effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN AIERTE ELECTRIC CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-06-02
AI Technical Summary
Existing air conditioners have copper tubes in the evaporator that have low heat transfer efficiency and are prone to frost, which leads to a decline in evaporator performance.
A spiral guide groove and a turbulence structure are set inside the copper tube body, and a condensate groove and a water guide ridge are set on the outer wall. A hydrophobic coating is applied to the water guide ridge to enhance the contact between the refrigerant and the tube wall and to guide the condensate to prevent frost formation.
It improves the heat transfer efficiency and anti-frost effect of copper pipes, enhances the heat transfer between refrigerant and pipe wall, and prevents condensate from staying on the outer wall of copper pipe for a long time to form a frost layer.
Smart Images
Figure CN224316293U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air conditioning copper pipe technology, and more specifically, to an air conditioning copper pipe with a spiral guide groove. Background Technology
[0002] In the field of refrigeration and air conditioning technology, the evaporator, as the core component for realizing the phase change and heat absorption of refrigerant, directly determines the energy efficiency and operational stability of the entire system. Copper tubes, with their excellent thermal conductivity, ductility, and corrosion resistance, have long been widely used as key heat transfer elements for refrigerant circulation and heat exchange within the evaporator. However, the conventional smooth-walled straight copper tube structure currently in common use has gradually revealed its inherent technical limitations in practical applications, especially under harsh conditions such as low temperature and high humidity. These limitations are mainly reflected in the limited improvement of heat transfer efficiency and significant condensation on the outer surface, which restricts the further optimization of the overall performance of the evaporator and the continuous improvement of system energy efficiency.
[0003] On the one hand, the smooth, flat inner surface of the straight copper tube lacks an effective guiding and disturbance mechanism for the flowing working fluid. When the refrigerant flows through the tube, it easily forms a relatively stable laminar flow or a single flow pattern. This flow pattern results in a relatively limited contact area between the refrigerant fluid and the tube wall metal, preventing the refrigerant from fully and efficiently exchanging heat with the tube wall material, thus hindering the heat transfer process. This inadequate heat transfer makes it difficult for the evaporator's heat exchange capacity per unit area to reach an ideal state.
[0004] On the other hand, during the operation of the evaporator, water vapor in the air is very easy to condense on the surface of the cold pipe wall. The smooth pipe wall surface lacks an effective structure for guiding and retaining condensate. The condensate droplets formed in the early stage are easy to aggregate and quickly freeze in local areas to form an initial frost layer. The frost layer will hinder the heat transfer between the air outside the pipe and the low-temperature refrigerant inside the pipe, resulting in a decrease in the heat exchange efficiency of the evaporator.
[0005] Therefore, the existing copper tubes in air conditioner evaporators need improvement in terms of heat transfer efficiency and preventing frost from forming on the surface of the copper tubes. Utility Model Content
[0006] To address the aforementioned technical problems, this utility model provides an air conditioning copper pipe with a spiral guide groove, which solves the technical problems of low heat transfer efficiency and easy frost condensation on the copper pipe of the traditional air conditioner evaporator in the prior art.
[0007] The purpose and function of this utility model of an air conditioning copper pipe with a spiral guide groove are achieved by the following specific technical means:
[0008] An air conditioning copper pipe with a spiral guide groove includes: a copper pipe body, one end of which is an inlet end and the other end of which is an outlet end;
[0009] The outer wall of the copper tube body is provided with multiple sets of condensate water tanks at intervals;
[0010] A water guide ridge is provided at the bottom of the copper pipe body;
[0011] The inner wall of the copper tube body is provided with multiple sets of turbulence structures at intervals. Each set of turbulence structures includes multiple turbulence plates arranged in two rows. The two rows of turbulence plates are staggered on the inner wall of the copper tube body. The turbulence plates are provided with flow guide holes. A spiral flow guide groove is provided between two adjacent sets of turbulence structures.
[0012] According to a preferred embodiment, from the inlet end to the outlet end of the copper tube body, the spiral spacing between each set of spiral guide grooves increases sequentially.
[0013] According to a preferred embodiment, the depth of the spiral guide groove is 0.18-0.22 mm.
[0014] According to a preferred embodiment, the cross-section of the water-guiding ridge is triangular.
[0015] According to a preferred embodiment, the surface of the water-guiding ridge is coated with a hydrophobic coating.
[0016] According to a preferred embodiment, the hydrophobic coating is a polytetrafluoroethylene dispersion coating.
[0017] According to a preferred embodiment, the outer diameter of the copper tube body is 7mm-7.1mm, and the wall thickness of the copper tube body is 0.32mm-0.36mm.
[0018] Based on the above aspects, the embodiments of this application achieve the following:
[0019] 1. By setting spiral guide grooves inside the copper tube body, the contact area between the refrigerant and the tube wall inside the copper tube body is increased, thereby improving the heat transfer efficiency between the copper tube and the refrigerant. At the same time, multiple sets of spiral guide grooves are distributed at intervals, and the spiral spacing gradually increases from the inlet end to the outlet end, which disrupts the regular swirling flow of the refrigerant over a long distance inside the copper tube. The turbulence plates set between the multiple sets of spiral guide grooves generate additional micro vortices when the refrigerant flows along the grooves, further enhancing the near-wall disturbance, destroying the boundary layer, and thus improving the heat transfer efficiency between the refrigerant and the tube wall.
[0020] 2. Multiple sets of condensate grooves are provided on the outer wall of the copper tube body. When the evaporator is working, the condensate water condensed on the outer wall of the copper tube body will flow along the condensate grooves to the water guide ridge. The water guide ridge is coated with a hydrophobic coating, which is a polytetrafluoroethylene dispersion coating. When the condensate water flows to the bottom of the water guide ridge, due to the hydrophobicity of the polytetrafluoroethylene dispersion coating, the condensate water is easy to drip off and does not easily stay on the outer wall of the copper tube body to gradually form a frost layer, thus improving the anti-frost effect of the copper tube. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of an air conditioning copper pipe with a spiral guide groove provided in an embodiment of this utility model;
[0022] Figure 2 This is a schematic diagram of the internal structure of the copper pipe body in an air conditioning copper pipe with a spiral guide groove provided in an embodiment of this utility model;
[0023] Figure 3 yes Figure 2 Enlarged view of region a in the middle;
[0024] Figure 4 This is a cross-sectional view of the copper pipe body in an air conditioning copper pipe with a spiral guide groove provided in an embodiment of this utility model.
[0025] In the diagram, the correspondence between component names and drawing numbers is as follows:
[0026] 100. Copper tube body; 101. Spiral guide groove; 102. Baffle plate; 103. Condensate tank; 104. Water guide ridge; 105. Guide hole; 106. Inlet end; 107. Outlet end. Detailed Implementation
[0027] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.
[0028] As attached Figure 1 To be continued Figure 4 As shown:
[0029] An air conditioning copper pipe with spiral guide grooves includes a copper pipe body 100, one end of the copper pipe is an inlet end 106, and the other end of the copper pipe is an outlet end 107. The copper pipe body 100 is internally processed with multiple sets of spiral guide grooves 101. These spiral guide grooves 101 are distributed in a spiral shape, which improves the heat transfer effect between the copper pipe and the refrigerant by increasing the contact area between the refrigerant and the pipe wall. The copper pipe body 100 is also provided with multiple sets of turbulence structures, which can disturb the flow of refrigerant. At the same time, multiple sets of condensate water grooves 103 are opened on the outer surface of the copper pipe body 100 to guide the condensate water condensed on the outer wall of the copper pipe when the evaporator is working. There is a water guide ridge 104 at the bottom of the copper pipe body 100, which can collect the condensate water and prevent the condensate water from staying on the outer wall of the copper pipe body 100 for a long time.
[0030] There is a certain interval between the multiple sets of spiral guide grooves 101, and the pitch of these spiral guide grooves 101 gradually increases from the inlet end 106 to the outlet end 107. This spiral guide groove 101 with interval distribution and varying pitch can disrupt the regular swirling motion of the refrigerant over a long distance in the copper tube, making the flow of the refrigerant more complex and variable, thereby enhancing the heat transfer process.
[0031] Each set of turbulence structures includes multiple sets of turbulence vanes 102 arranged in two rows. The two rows of turbulence vanes 102 are staggered on the inner wall of the copper tube body 100. Each set of turbulence vanes 102 has a guide hole 105 on one side. When the refrigerant flows along the spiral guide groove 101, it will collide with the turbulence vanes 102. The turbulence vanes 102 cause the refrigerant to generate additional micro vortices. These vortices enhance the degree of turbulence of the refrigerant near the inner wall of the copper tube, destroy the boundary layer formed by the refrigerant near the tube wall, and further improve the heat transfer efficiency between the refrigerant and the tube wall. The staggered arrangement makes the turbulence effect of the turbulence vanes 102 better.
[0032] Multiple sets of condensate tanks 103 are evenly distributed on the outer wall of the copper tube body 100. The depth of each set of condensate tanks 103 is 0.05mm-0.1mm. These condensate tanks 103 can guide the condensate that condenses on the outer wall of the copper tube body 100 when the evaporator is working, allowing the condensate to flow along the channels and thus flow to the water guide ridge 104.
[0033] The bottom of the copper pipe body 100 and the water guide ridge 104 are integrally formed. The cross-section of the water guide ridge 104 is triangular. This shape design helps the condensate to collect better in the water guide ridge 104.
[0034] The water guide ridge 104 is coated with a hydrophobic coating, which is a polytetrafluoroethylene (PTFE) dispersion coating. The PTFE dispersion coating has a water contact angle greater than 150° and strong chemical inertness, resisting the corrosion of most refrigerants and lubricating oils. The PTFE dispersion coating has a low coefficient of friction, which is conducive to water droplet dripping and reduces the residence time of condensate on the outer wall of the copper tube body 100. This prevents condensate from condensing into frost over time and improves the practicality of the copper tube. When condensate flows along the condensate trough 103 to the bottom of the water guide ridge 104, the bottom arc surface is hydrophobic, so the condensate will not adhere to it but drips more easily, avoiding the condensate from staying on the outer wall of the copper tube body 100 and gradually forming a frost layer, effectively improving the anti-frost effect of the copper tube.
[0035] The outer diameter of the copper tube body 100 is 7mm-7.1mm, the wall thickness is 0.32mm-0.36mm, and the groove depth of the multiple sets of spiral guide grooves 101 is 0.18mm-0.22mm, which ensures that the copper tube has good heat transfer performance and anti-frost effect, while also meeting the strength requirements in actual use.
[0036] The specific usage and function of this embodiment are as follows:
[0037] When users use this copper pipe as the pipe of the air conditioner evaporator, the spiral guide groove 101 set inside the copper pipe body 100 can increase the contact area between the refrigerant and the pipe wall of the copper pipe body 100, thereby improving the heat transfer efficiency between the copper pipe and the refrigerant. At the same time, since multiple sets of spiral guide grooves 101 are distributed at intervals and the spiral spacing gradually increases, the regular swirling flow of the refrigerant over a long distance in the copper pipe is disrupted, making the heat exchange between the refrigerant and the copper pipe body 100 more complete. The turbulence plate 102 set between the multiple sets of spiral guide grooves 101 further enhances the disturbance near the wall when the refrigerant flows along the groove, destroys the boundary layer, improves the heat transfer efficiency between the refrigerant and the pipe wall, and makes the whole heat transfer process more efficient.
[0038] The cross-section of the water guide ridge 104 is triangular. The water guide ridge 104 is coated with a polytetrafluoroethylene dispersion coating. When the user uses this copper pipe, when the condensate flows along the condensate tank 103 to the bottom of the water guide ridge 104, due to the hydrophobicity of the polytetrafluoroethylene dispersion coating, the condensate does not easily stay at the bottom of the water guide ridge 104 for a long time. This prevents the condensate from staying on the outer wall of the copper pipe body 100 and gradually forming a frost layer, effectively improving the anti-frost effect of the copper pipe.
[0039] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. An air conditioning copper pipe with a spiral guide groove, comprising a copper pipe body (100), one end of the copper pipe body (100) being an inlet end (106), and the other end of the copper pipe body (100) being an outlet end (107), characterized in that: The outer wall of the copper pipe body (100) is provided with multiple sets of condensate tanks (103) at intervals; A water guide ridge (104) is provided at the bottom of the copper pipe body (100); The inner wall of the copper tube body (100) is provided with multiple sets of turbulence structures at intervals. Each set of turbulence structures includes multiple turbulence plates (102) arranged in two rows. The two rows of turbulence plates (102) are staggered on the inner wall of the copper tube body (100). The turbulence plates (102) are provided with flow guide holes (105). A spiral flow guide groove (101) is provided between two adjacent sets of turbulence structures.
2. An air conditioning copper pipe with a spiral guide groove according to claim 1, characterized in that... : From the inlet end (106) to the outlet end (107) of the copper tube body (100), the spiral spacing between each set of spiral guide grooves (101) increases sequentially.
3. An air conditioning copper pipe with a spiral guide groove according to claim 2, characterized in that... : The depth of the spiral guide groove (101) is 0.18mm-0.22mm.
4. An air conditioning copper pipe with a spiral guide groove according to claim 1, characterized in that: The cross-section of the water-guiding ridge (104) is triangular.
5. An air conditioning copper pipe with a spiral guide groove according to claim 4, characterized in that: The surface of the water-guiding ridge (104) is coated with a hydrophobic coating.
6. An air conditioning copper pipe with a spiral guide groove according to claim 5, characterized in that: The hydrophobic coating is a polytetrafluoroethylene dispersion coating.
7. An air conditioning copper pipe with a spiral guide groove according to claim 1, characterized in that: The outer diameter of the copper tube body (100) is 7mm-7.1mm, and the wall thickness of the copper tube body (100) is 0.32mm-0.36mm.