Topological curved surface wave corrugated air conditioner high-efficiency heat exchange evaporation pipe

Abstract

The utility model discloses a kind of topological surface corrugated air conditioner high-efficiency heat exchange evaporation pipes, including evaporation pipe body, the evaporation pipe body is provided with core pipe, the outside of core pipe is fixedly wrapped with heat shrink tube, topological surface is opened in the circumferential inner wall of evaporation pipe body, the inner annular surface of evaporation pipe body is fixedly provided with baffling mechanism. The topological surface corrugated air conditioner high-efficiency heat exchange evaporation pipe, hot medium impact on the narrow part of baffle block, the beam medium is divided into three groups, in turn through baffle block, and pass through multiple groups of baffle block and carry out turbulence blocking, the baffle block of isosceles trapezoidal will main stream be divided into upper center flow, wall flow and lateral flow, form complex vortex system structure behind baffle block, significantly enhance radial mixing;Shunting effect makes fluid constantly scour wall surface, destroy thermal boundary layer, reduce thermal resistance;When fluid passes through multiple groups of baffle block in turn, form disturbance, recovery and again disturbance cycle.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning accessories, specifically a high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface. Background Technology

[0002] With social and economic progress and the improvement of people's living standards, people have increasingly higher requirements for air conditioning systems and stricter requirements for their energy efficiency. Energy conservation has become an increasingly important focus of society. The evaporator is an important component of the air conditioning system, and the core of the evaporator is the evaporator core. Due to the good pressure resistance, shock resistance, and corrosion resistance of finned tube heat exchange cores, most automotive air conditioning systems currently use finned tube heat exchange cores.

[0003] Regarding patents related to evaporators, a search revealed a patent with publication number CN221483914U that discloses an improved automotive air conditioning evaporator. The patent includes an evaporator tube assembly, a liquid distribution assembly, and a gas return assembly. The evaporator tube assembly includes a front end plate, a rear end plate, and several evaporator tubes installed between the front end plate and the rear end plate. Fins are installed on the outside of the evaporator tubes. The same end of two adjacent evaporator tubes is connected by a U-shaped tube, and several evaporator tubes form a heat exchange loop.

[0004] While the aforementioned device can integrate the evaporator core and evaporator fan onto the air conditioner base, resulting in a more compact air conditioner structure and reduced volume, in actual use, the refrigerant flow within the smooth inner wall tends to remain in a laminar flow state (or low turbulence). In laminar flow, the fluid flows in layers along the pipe axis, with almost no macroscopic mixing between the layers. Heat transfer mainly relies on molecular diffusion, leading to the formation of a relatively thick thermal boundary layer (the region with the largest temperature gradient in the fluid) between the pipe wall and the refrigerant. This thick boundary layer significantly increases thermal resistance and weakens the heat exchange efficiency between the refrigerant and the pipe wall. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface, so as to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, a high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface is provided, including an evaporator tube body, a core tube provided on the evaporator tube body, a heat shrink tubing fixedly wrapped around the outer side of the core tube, a topological curved surface formed on the inner circumference of the evaporator tube body, and a baffle mechanism fixedly provided on the inner ring surface of the evaporator tube body, the baffle mechanism including a fixing plate fixedly connected to the inner ring surface of the evaporator tube body, and a baffle block fixedly provided on the fixing plate.

[0007] Furthermore, the evaporator tube body is serrated and consists of a core tube, a heat shrink tube, and a flow-deflecting component. The flow-deflecting component consists of a topological surface and a flow-deflecting mechanism.

[0008] Furthermore, the topological surface is arranged in a spiral shape and includes a flow-disrupting groove.

[0009] Furthermore, the depth of the turbulence channel is 0.4 mm, and the cross-section of the turbulence channel is an isosceles trapezoid.

[0010] Furthermore, multiple sets of flow deflection mechanisms are equidistantly distributed on the inner wall of the core tube, and five sets of flow deflection mechanisms are uniformly arranged on the inner circumference of the cross-section of the core tube.

[0011] Furthermore, the baffle is an isosceles trapezoid with a narrow section at one end and a wide section at the other end. The narrow section is positioned opposite to the flow direction of the heat exchange medium inside the core tube.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This application uses a serrated structure to extend the flow path of the fluid within the evaporator tube, increasing the contact time with the surrounding environment and thus improving heat transfer efficiency. The tube wall at the bends in the evaporator tube disrupts the fluid flow, creating turbulence, which helps break the boundary layer, reduces thermal resistance, and enhances convective heat transfer. The serrated pipe can increase the effective length through the bends, making it suitable for miniaturized or integrated equipment designs. It also promotes fluid mixing and heat transfer, optimizing reaction conditions.

[0014] 2. This application utilizes a spiral-shaped topological surface, including turbulence grooves, on the inner wall of the core tube. This spiral topological structure and turbulence grooves force the fluid to form a spiral flow or secondary flow, disrupting boundary layer development and significantly improving the convective heat transfer coefficient. The centrifugal force and turbulent shear force generated by the spiral flow reduce particle deposition on the tube wall, lowering the risk of scaling and extending maintenance cycles. Enhanced heat transfer reduces localized high-temperature areas, preventing crystallization or polymerization of fouling caused by temperature gradients. For the evaporation process, the spiral turbulence grooves guide bubbles away from the wall surface, preventing vapor film formation, increasing the critical heat flux density, and avoiding localized dry burning.

[0015] 3. In this application, the heat exchange medium impacts the narrow section of the baffle block, and the medium is divided into three groups, which pass through the baffle block in sequence. The baffle block is further turbulent and blocked by multiple groups of baffle blocks. The isosceles trapezoidal baffle block divides the main flow into the upper central flow, the wall flow, and the lateral flow, forming a complex vortex structure behind the baffle block, which significantly enhances radial mixing. The flow splitting effect causes the fluid to continuously scour the wall, destroy the thermal boundary layer, and reduce thermal resistance. When the fluid passes through multiple groups of baffle blocks in sequence, it forms a cycle of disturbance, recovery, and re-disturbance, maintaining high turbulence intensity and further improving heat exchange efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the evaporator tube body of this utility model.

[0017] Figure 2 This is a schematic diagram of the cross-section of the core tube of this utility model.

[0018] Figure 3 for Figure 2 Side view;

[0019] Figure 4 This is a schematic diagram of the baffle mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the topological surface on the cross-section of the core tube of this utility model;

[0021] Figure 6 for Figure 5 Rear view.

[0022] The following numbers are labeled in the diagram: 100, Evaporator tube body; 1, Core tube; 2, Heat shrink tubing; 3, Topological surface; 30, Baffle groove; 4, Baffle mechanism; 41, Fixing plate; 42, Baffle block; 421, Narrow section; 422, Wide section. Detailed Implementation

[0023] Please see Figure 1-6 This utility model provides a high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface, including an evaporator tube body 100, a core tube 1 on the evaporator tube body 100, a heat shrink tube 2 fixedly wrapped around the outside of the core tube 1, a topological curved surface 3 on the inner circumference of the evaporator tube body 100, and a baffle mechanism 4 fixedly arranged on the inner ring surface of the evaporator tube body 100. The baffle mechanism 4 includes a fixing plate 41 fixedly connected to the inner ring surface of the evaporator tube body 100, and a baffle block 42 fixedly arranged on the fixing plate 41.

[0024] In a preferred embodiment, the evaporator tube body 100 is serrated and consists of a core tube 1, a heat shrink tube 2, and a flow-deflecting component. The flow-deflecting component consists of a topological surface 3 and a flow-deflecting mechanism 4.

[0025] The topological surface 3 is arranged in a spiral shape and includes a turbulence groove 30.

[0026] The depth of the turbulence channel 30 is 0.4 mm, and the cross-section of the turbulence channel 30 is an isosceles trapezoid.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown: When the heat exchange medium flows inside the core tube 1, a topological surface 3 is provided on the inner wall of the core tube 1. The topological surface 3 is helical and includes a turbulence groove 30. The helical topological surface 3 and the turbulence groove 30 on the inner wall of the core tube force the fluid to form a helical flow or secondary flow, disrupting the development of the boundary layer and significantly improving the convective heat transfer coefficient. The geometry of the turbulence groove 30 induces local vortices, increases the mixing degree of fluid micro-particles, and enhances heat and mass transfer. The helical path effect occurs when the fluid flows along the helical surface. The actual flow path is longer than that of a straight pipe, extending the heat exchange time, which is especially suitable for low-flow or high-viscosity media; it increases the contact area, and the undulating structure of the topological surface 3 increases the inner wall surface area, directly improving the heat transfer area; the centrifugal force and turbulent shear force generated by the spiral flow can reduce particle deposition on the pipe wall, reduce the risk of scaling, and extend the maintenance cycle; enhanced heat transfer can reduce local high-temperature areas and avoid crystallization or polymerization of fouling caused by temperature gradients; for the evaporation process, the spiral turbulence groove 30 can guide bubbles to detach from the wall surface, prevent vapor film formation, increase the critical heat flux density, and avoid local dry burning.

[0028] As a preferred embodiment, multiple sets of flow deflection mechanisms 4 are equidistantly distributed on the inner wall of the core tube 1, and five sets of flow deflection mechanisms 4 are uniformly arranged on the inner wall of the cross-section of the core tube 1.

[0029] The baffle 42 is an isosceles trapezoid with a narrow section 421 at one end and a wide section 422 at the other end. The narrow section 421 is positioned opposite to the flow direction of the heat exchange medium inside the core tube 1.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown: Multiple sets of baffle mechanisms 4 are evenly distributed on the inner wall of the core tube 1. The baffle blocks 42 are isosceles trapezoids, and the narrow part 421 is set opposite to the flow direction of the heat exchange medium inside the core tube 1. The heat exchange medium impacts the narrow part 421 of the baffle block 42, and the medium is divided into three groups, which pass through the baffle block 42 in sequence. The multiple sets of baffle blocks 42 turbulently block the flow. The isosceles trapezoidal baffle blocks 42 divide the main flow into the upper central flow, the wall flow, and the lateral flow, forming a flow pattern behind the baffle blocks 42. The complex vortex structure significantly enhances radial mixing; the flow splitting effect causes the fluid to continuously scour the wall, disrupting the thermal boundary layer and reducing thermal resistance; the isosceles trapezoidal geometry, with the narrow section 421 facing the flow and the wide section 422 flowing with the flow, reduces the flow separation zone and improves heat transfer efficiency; the trapezoidal structure has a more uniform wake vortex shedding frequency, avoiding additional energy loss caused by resonance; when the fluid passes through multiple sets of baffles 42 in sequence, it forms a cycle of disturbance, recovery, and re-disturbance, maintaining high turbulence intensity.

[0031] Working Principle: In actual use, the evaporator tube body 100 is serrated. The serrated structure makes the fluid flow path within the evaporator tube body 100 longer, increasing the contact time with the surrounding environment and thus improving heat transfer efficiency. The tube wall at the bends of the evaporator tube body 100 disrupts the fluid flow state, forming turbulence, which helps break the boundary layer, reduce thermal resistance, and enhance convective heat transfer. Compared with straight pipes, the serrated structure has stronger bending and vibration resistance, making it suitable for scenarios with large vibrations or impacts. In limited spaces, the serrated pipe can increase the effective length through the bending path, making it suitable for miniaturized or integrated equipment designs. For multiphase flows or fluids that need to be mixed, the serrated pipe can enhance the degree of turbulence, making the fluid mix more complete, improving reaction uniformity, improving the heat exchange efficiency between refrigerant and air, and reducing energy consumption; it promotes fluid mixing and heat transfer, and optimizes reaction conditions.

Claims

1. A high-efficiency heat exchange evaporator tube for air conditioning with a topologically curved corrugated surface, comprising an evaporator tube body (100), characterized in that: The evaporator tube body (100) is provided with a core tube (1), and a heat shrink tube (2) is fixedly wrapped around the outside of the core tube (1). A topological curved surface (3) is opened on the inner circumference of the evaporator tube body (100). A flow baffle mechanism (4) is fixedly provided on the inner ring surface of the evaporator tube body (100). The flow baffle mechanism (4) includes a fixing plate (41) fixedly connected to the inner ring surface of the evaporator tube body (100). A flow baffle block (42) is fixedly provided on the fixing plate (41).

2. The high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface as described in claim 1, characterized in that: The evaporator tube body (100) is serrated. The evaporator tube body (100) consists of a core tube (1), a heat shrink tube (2) and a flow-disrupting component. The flow-disrupting component consists of two parts: a topological surface (3) and a flow-deflecting mechanism (4).

3. The high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface as described in claim 2, characterized in that: The topological surface (3) is arranged in a spiral shape and includes a turbulence groove (30).

4. The high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface as described in claim 3, characterized in that: The depth of the turbulence groove (30) is 0.4 mm, and the cross-section of the turbulence groove (30) is an isosceles trapezoid.

5. The high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface as described in claim 1, characterized in that: Multiple sets of flow deflection mechanisms (4) are equidistantly distributed on the inner wall of the core tube (1), and five sets of flow deflection mechanisms (4) are uniformly arranged on the inner wall of the cross-section of the core tube (1).

6. The high-efficiency heat exchange evaporator tube for air conditioning with a topological curved corrugated surface as described in claim 1, characterized in that: The baffle (42) is an isosceles trapezoid with a narrow section (421) at one end and a wide section (422) at the other end. The narrow section (421) is positioned opposite to the flow direction of the heat exchange medium inside the core tube (1).

Images